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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.

The impact of error propagation on software reliability analysis of component-based systems

Popic, Petar. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 2005. / Title from document title page. Document formatted into pages; contains ix, 118 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 45-46).

Um estudo sobre os riscos inerentes a implantação do reuso de componentes no processo de desenvolvimento de software / Study about implementation risks of component reuse in the software development process

Sanches, Mauricio Gruhn 28 June 2005 (has links)
Orientador: Ana Cervigni Guerra / Dissertação (mestrado profissional) - Universidade Estadual de Campinas, Instituto de Computação / Made available in DSpace on 2018-08-05T06:59:49Z (GMT). No. of bitstreams: 1 Sanches_MauricioGruhn_M.pdf: 621110 bytes, checksum: b9818d8d518e03c417515cfe58fe3990 (MD5) Previous issue date: 2005 / Resumo: No mundo globalizado de hoje, a necessidade de se prover sistemas para o gerenciamento do grande volume de informações gerado a cada dia torna imperativa a busca contínua por novas práticas e formas de desenvolvimento de software para a manipulação dessas informações. Isso está vinculado também à necessidade de se conseguir ganhos de qualidade, produtividade e redução de custos em tais desenvolvimentos, pois esses são fatores fundamentais no sucesso do negócio de empresas ligadas à tecnologia da informação. Nesse cenário, o reuso de componentes no processo de desenvolvimento de software vem a exercer um papel importante na concretização desses objetivos. Este trabalho apresenta os conceitos envolvidos no contexto de um processo de desenvolvimento de software baseado em componentes reusáveis. São apresentadas as diferentes formas de reuso, o conceito de componentes reusáveis e as formas que esses componentes podem assumir dentro de um domínio de aplicação. Componentes possuem características diferentes, podem ser originados a partir de diversas fontes e carregam detalhes importantes que devem ser considerados durante a sua documentação. Todos esses aspectos influenciam o grau de reuso de um componente dentro do projeto ou organização. São apresentadas algumas tecnologias que promovem a aplicação do reuso de componentes e os conceitos envolvidos na definição, gerenciamento e implantação de repositórios de componentes reusáveis, fundamentais na consolidação do processo de reuso. Novos papéis e responsabilidades envolvidos no processo de reuso são apresentados, além de exemplos de métricas a serem utilizadas com o intuito de auxiliar a medição dos benefícios proporcionados pelo reuso dentro de um processo já consolidado. O resultado desse trabalho é uma análise crítica em relação aos benefícios do reuso e os riscos associados à sua implementação no processo de desenvolvimento de software, considerandose os aspectos tecnológicos, humanos e econômicos envolvidos em cada tópico abordado ao longo do trabalho / Abstract: In a globalized world, the needs to release new systems to manage the large volume of information generated every day force a continuous search for new software development practices in order to handle this information. This is related to the needs to obtain quality and productivity improvements, as well as cost reduction in such development, because these are the main success factors of Information Technology companies. In this scenario, the component reuse in the software development process plays an important role in order to achieve these goals. This work presents the concepts around the context of a software development process based on reusable components. Different types of reuse are explained, as well as the concept of a reusable component and types of components inside an application domain. Components have different characteristics, are originated from different sources and carry on important details that should be analyzed during its documentation. All these aspects have influence on the reuse level of the components inside the project or the company. Some technologies that promote the component reuse and the concepts involved in the definition, management and implementation of reusable software components, which are the basis to consolidate the reuse process, are presented. New roles and responsibilities involved in the reuse process are shown, and also some metrics used to help to measure the benefits due to a consolidated reuse process. The results of this work are a critical analysis about the reuse benefits and the risks associated to its implementation in the software development process, taking into account the technological, human and economic factors involved on each topic discussed along this work / Mestrado / Engenharia de Software / Mestre Profissional em Computação

Modelovací nástroj pro grafický návrh komponentových systémů / A Tool for Modelling of Component-Based Systems

Zemko, Zoltán January 2013 (has links)
Component-based Software Engineering describes a complex information system as a set of components. The thesis seeks to highlight the benefits of this approach. Also defines terms such as standard software, component software, and others. It provides an introduction to the modeling techniques of component-based systems in UML. The second half of the document describes the structure of the Eclipse Modeling Project. The reader by these lines should obtain a theoretical overview of the development of modeling tools under Eclipse. The document includes design and implementation process description of the tool for modeling component-based systems which has been developed using the Eclipse Modeling Framework and Graphical Modeling Framework.

An Environment For Specifying and Executing Adaptable Software Components

Unhale, Sudeep Prabhakar 27 April 2003 (has links)
One of the difficulties of Component Based Software Engineering (CBSE) [1] in reusing pre-existing components is the need to adapt these components to work within the desired target systems [2, 3, 4, 5, 6]. Third-party or in-house Commercial Off-the-shelf (COTS) components may not always have the required exact functionality demanded by the builders of the target system, so these systems have to be either modified [2, 3, 4, 5, 6] or adapted to provide this required functionality. Modifying these components may not be always practically possible. In this thesis, we propose an infrastructure that supports the active interface adaptation technique [3, 8, 9, 10]. This infrastructure directly addresses the problem of effectively packaging components for third-party use, adaptation, and deployment. Doing so we support both component designers and third party application builders. Further we evaluate our approach using several adaptations over the case studies.

CCS - Collect, Convert and Send : Designing and implementing a system for data portability and media migration to mobile devices

Gustafsson, Jonas, Alserin, Fredrik January 2006 (has links)
<p>In this thesis we will identify which are the desired features and functionalities for implementing a system capable of acting as an information bridge for content available in the “wired” Internet to be delivered to mobile devices. We will also explore how to design and build such a system based on the specifications within parts of the MUSIS project. The MUSIS’ system development is used as a base of the work described in this thesis and the experiences from those efforts are used in order to design a system with more focus on data portability and media migration.</p><p>During the development of the MUSIS platform, problems related to system upgrading, i.e. adding new ad-hoc functionalities were discovered. Due to the fact that a user-centred design approach was taken, this was essential in the project. To solve some of these issues, we propose a new component-based system with a high level of scalability and re-usability. We name this system Collect, Convert and Send, CCS. The system shall be seen as a base that can be used as a core system for different projects where interoperability of content between different platforms, devices or systems is important.</p><p>The implementation of the system is based on the use cases and those theoretical aspects and ideas related to component software, interoperability, media migration and metadata in a Web service context. The results of our efforts give some indications that the use of component software gives a foundation for a service-oriented architecture.</p>

Eliciting Expert Knowledge for Bayesian Logistic Regression in Species Habitat Modelling

Kynn, Mary January 2005 (has links)
This research aims to develop a process for eliciting expert knowledge and incorporating this knowledge as prior distributions for a Bayesian logistic regression model. This work was motivated by the need for less data reliant methods of modelling species habitat distributions. A comprehensive review of the research from both cognitive psychology and the statistical literature provided specific recommendations for the creation of an elicitation scheme. These were incorporated into the design of a Bayesian logistic regression model and accompanying elicitation scheme. This model and scheme were then implemented as interactive, graphical software called ELICITOR created within the BlackBox Component Pascal environment. This software was specifically written to be compatible with existing Bayesian analysis software, winBUGS as an odd-on component. The model, elicitation scheme and software were evaluated through five case studies of various fauna and flora species. For two of these there were sufficient data for a comparison of expert and data-driven models. The case studies confirmed that expert knowledge can be quantified and formally incorporated into a logistic regression model. Finally, they provide a basis for a thorough discussion of the model, scheme and software extensions and lead to recommendations for elicitation research.

RIGEL : um repositorio com suporte para desenvolvimento basaeado em componentes / RIGEL : a repository with support for component based development

Pinho, Helder de Sousa 24 February 2006 (has links)
Orientador: Cecilia Mary Fischer Rubira / Dissertação (mestrado profissional) - Universidade Estadual de Campinas, Instituto de Computação / Made available in DSpace on 2018-08-07T00:50:23Z (GMT). No. of bitstreams: 1 Pinho_HelderdeSousa_M.pdf: 1255692 bytes, checksum: 91ab06629ddbbf4b6885b93010e3511f (MD5) Previous issue date: 2006 / Resumo: O desenvolvimento baseado em componente (DBC) pennite que uma aplicação seja construída pela composição de componentes de software que já foram previamente especificados, construídos e testados, resultando em ganhos de produtividade e qualidade no software produzido. Para haver reuso de componentes, é necessário que usuários consIgam procurar e recuperar componentes previamente especificados ou implementados Um repositório de componentes é essencial para possibilitar tal reuso. Interoperabilidade é um requisito importante para repositórios, mas nem todas as ferramentas a tratam com a devida relevância. O modelo de metadados de um repositório para DBC deve contemplar características de componentes, tais como interface e separação entre especificação e implementação. Este trabalho apresentou o Rigel, um repositório de bens de software reutilizáveis com suporte para desenvolvimento baseado em componentes. O Rigel apresenta características que facilitam atividades executadas durante o desenvolvimento de sistemas baseados em componentes, tais como pesquisa, armazenamento e recuperação de bens e integração com CVS. O padrão RAS foi adotado como o fonnato de metadados e de empacotamento de bens, facilitando a integração do Rigel com outros sistemas. O modelo de metadados do RAS foi estendido para apoiar um modelo conceitual de componentes e arquitetura de software. Esta adaptação resultou na criação de quatro novos profiles RAS, para apoiar bens relacionados à DBC: componente abstrato, componente concreto, interface e configuração arquitetural. Um estudo de caso foi conduzido a fim de mostrar como o Rigel apóia um processo de desenvolvimento baseado em componentes. Conclui-se que as características do repositório Rigel facilitam um desenvolvimento baseado em componentes / Abstract: The component based development (CBD) permits an application to be built by composition of previously specified, build and tested components, resulting in increases in productivity and quality of the produced software. 1n order to make the reuse of components happen, it is necessary that users are able to search and retrieve previously specified or implemented components. A component repository is important to support this reuse. 1nteroperability is an important requirement for repositories, but not alI the tools consider it with the required relevance. The metadata model of a CBD repository must handle components features, such as interface and separation between specification and implementation. This work presents Rigel, a repository of reusable software assets with a support for component based development. Rigel presents features that make activities performed during the development of component based systems easier, such as search, storage and retrieval of assets and CVS integration. RAS standard was adopted as the asset metadata and packaging format, making Rigel integration with other systems easier. The RAS metadata model was extended to support a conceptual model of components and software architecture. This adaptation resulted in the creation of four new RAS profiles to support CBD related assets: abstract component, concrete component, interface and architectural configuration. A case study was conducted in order to show how Rigel supports a CBD processo We also conclude that Rigel repository features make the component based development easier / Mestrado / Engenharia de Computação / Mestre em Computação

Objetos complexos em bibliotecas digitais = analisando o gerenciamento de componentes de imagens / Complex objects in digital libraries : analyzing the management of image components

Kozievitch, Nádia Puchalski 07 August 2011 (has links)
Orientador: Ricardo da Silva Torres / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Computação / Made available in DSpace on 2018-08-18T15:54:47Z (GMT). No. of bitstreams: 1 Kozievitch_NadiaPuchalski_D.pdf: 7513500 bytes, checksum: c6d45f0141cb99375cfcabb03d93ca73 (MD5) Previous issue date: 2011 / Resumo: Atualmente, com os avanços tecnológicos, há disponível uma quantidade grande e heterogênea de dados multimídia. Estes dados podem ser provenientes de fontes diversificadas, desempenhando um papel fundamental em sistemas de informação, tais como repositórios de Bibliotecas Digitais. Com o objetivo de reutilizar, integrar, agregar e unificar diferentes recursos sob o mesmo conceito, objetos complexos surgiram para facilitar a abstração de agregações, utilizando componentes de diferentes domínios, e unificando-os sob o mesmo conceito. Em especial, os objetos complexos de imagens são um exemplo representativo de fonte de dados que geralmente é integrada com componentes heterogêneos, tais como metadados, links e softwares de manipulação de imagem. A busca de imagens é um serviço importante, amplamente explorado em sistemas de Biblioteca Digital. A recuperação de imagens por conteúdo aborda a busca automática de imagens, considerando propriedades visuais (como textura e cor). Este trabalho trata de três aspectos relacionados a objetos complexos: (i) a formalização de conceitos; (ii) a comparação de tecnologias relacionadas; e (iii) a especificação e a implementação de um protótipo, que encapsula e publica objetos complexos de imagens manipulados em sistemas de busca de imagens por conteúdo. A infraestrutura proposta baseia-se em uma estrutura de componentização específica - Digital Content Component (DCC) - para encapsular o processo de busca de imagens por conteúdo e o objeto complexo de imagem. Posteriormente, os dados são publicados como itens de um repositório de dados, usando o protocolo Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH). A solução proposta prevê (i) um acesso homogêneo ao processo de busca de imagens por similaridade, e fontes de dados (imagens, metadados e descritores); (ii) a distribuição e coleta de metadados de objetos complexos de imagens, juntamente com as medidas de similaridade e vetores de características; e (iii) a centralização do processamento, encapsulamento, publicação e coleta do objeto complexo de imagem. Finalmente, é ilustrado o reuso dos componentes da infraestrutura proposta no domínio de biodiversidade, na integração de bibliotecas digitais de impressões digitais, na busca multimodal e em estórias de vídeo / Abstract: The large amount of heterogeneous data from different resources available today play a key role in information systems, such as Digital Library repositories. In order to reuse, integrate, aggregate, and unify different resources under the same concept, complex objects (COs) have emerged to facilitate aggregation abstraction, embracing components from different domains, and unifying them under the same concept. In special, image COs are a representative example of data source which is generally integrated with different components, such as metadata, links, and image manipulation software. Image search is an important service, widely explored in Digital Library systems. The so-called Content-Based Image Retrieval (CBIR) addresses the automatic search of images, trying to retrieve collection images by taking into account their visual properties (such as texture and color). This work is concerned with tackling three aspects related to complex objects: (i) formal definitions; (ii) comparison of related technologies; and (iii) the specification and implementation of a framework, which encapsulates and publishes complex image objects resulting from the CBIR process. Our infrastructure relies on a specific component technology - Digital Content Component (DCC) - to encapsulate the CBIR process and wrap image COs. Later, the data is exposed as items in a data repository, using Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH). The proposed solution provides (i) an homogeneous access to CBIR process and heterogenous data sources (image collection, metadata, descriptors); (ii) the harvesting of complex image objects (ICOs), along with the similarity distances and feature vectors; and (iii) the centralization of ICO processing, packaging, publishing, and harvesting. Finally, we illustrate the reuse of our infrastructure components in biodiversity domain, in a fingerprint digital library integration, with multimodal search, and video stories / Doutorado / Ciência da Computação / Doutor em Ciência da Computação

Process control and configuration of a reconfigurable production system using a multi-agent software system

Janse van Rensburg, Jean January 2011 (has links)
Thesis (M. Tech. (Information Technology)) -- Central University of technology, Free State, 2011 / Traditional designs for component-handling platforms are rigidly linked to the product being produced. Control and monitoring methods for these platforms consist of various proprietary hardware controllers containing the control logic for the production process. Should the configuration of the component handling platform change, the controllers need to be taken offline and reprogrammed to take the changes into account. The current thinking in component-handling system design is the notion of re-configurability. Reconfigurability means that with minimum or no downtime the system can be adapted to produce another product type or overcome a device failure. The re-configurable component handling platform is built-up from groups of independent devices. These groups or cells are each responsible for some aspect of the overall production process. By moving or swopping different versions of these cells within the component-handling platform, re-configurability is achieved. Such a dynamic system requires a flexible communications platform and high-level software control architecture to accommodate the reconfigurable nature of the system. This work represents the design and testing of the core of a re-configurable production control software platform. Multiple software components work together to control and monitor a re-configurable component handling platform. The design and implementation of a production database, production ontology, communications architecture and the core multi-agent control application linking all these components together is presented.

Evolving Legacy System's Features into Fine-grained Components Using Regression Test-Cases

Mehta, Alok 11 December 2002 (has links)
"Because many software systems used for business today are considered legacy systems, the need for software evolution techniques has never been greater. We propose a novel evolution methodology for legacy systems that integrates the concepts of features, regression testing, and Component-Based Software Engineering (CBSE). Regression test suites are untapped resources that contain important information about the features of a software system. By exercising each feature with its associated test cases using code profilers and similar tools, code can be located and refactored to create components. The unique combination of Feature Engineering and CBSE makes it possible for a legacy system to be modernized quickly and affordably. We develop a new framework to evolve legacy software that maps the features to software components refactored from their feature implementation. In this dissertation, we make the following contributions: First, a new methodology to evolve legacy code is developed that improves the maintainability of evolved legacy systems. Second, the technique describes a clear understanding between features and functionality, and relationships among features using our feature model. Third, the methodology provides guidelines to construct feature-based reusable components using our fine-grained component model. Fourth, we bridge the complexity gap by identifying feature-based test cases and developing feature-based reusable components. We show how to reuse existing tools to aid the evolution of legacy systems rather than re-writing special purpose tools for program slicing and requirement management. We have validated our approach on the evolution of a real-world legacy system. By applying this methodology, American Financial Systems, Inc. (AFS), has successfully restructured its enterprise legacy system and reduced the costs of future maintenance. "

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