122 research outputs found
Migrating C/C++ Software to Mobile Platforms in the ADM Context
Software technology is constantly evolving and therefore the development of applications requires adapting software components and applications in order to be aligned to new paradigms such as Pervasive Computing, Cloud Computing and Internet of Things. In particular, many desktop software components need to be migrated to mobile technologies. This migration faces many challenges due to the proliferation of different mobile platforms. Developers usually make applications tailored for each type of device expending time and effort. As a result, new programming languages are emerging to integrate the native behaviors of the different platforms targeted in development projects. In this direction, the Haxe language allows writing mobile applications that target all major mobile platforms. Novel technical frameworks for information integration and tool interoperability such as Architecture-Driven Modernization (ADM) proposed by the Object Management Group (OMG) can help to manage a huge diversity of mobile technologies. The Architecture-Driven Modernization Task Force (ADMTF) was formed to create specifications and promote industry consensus on the modernization of existing applications. In this work, we propose a migration process from C/C++ software to different mobile platforms that integrates ADM standards with Haxe. We exemplify the different steps of the process with a simple case study, the migration of “the Set of Mandelbrot” C++ application. The proposal was validated in Eclipse Modeling Framework considering that some of its tools and run-time environments are aligned with ADM standards
Migrating C/C++ Software to Mobile Platforms in the ADM Context
Software technology is constantly evolving and therefore the development of applications requires adapting software components and applications in order to be aligned to new paradigms such as Pervasive Computing, Cloud Computing and Internet of Things. In particular, many desktop software components need to be migrated to mobile technologies. This migration faces many challenges due to the proliferation of different mobile platforms. Developers usually make applications tailored for each type of device expending time and effort. As a result, new programming languages are emerging to integrate the native behaviors of the different platforms targeted in development projects. In this direction, the Haxe language allows writing mobile applications that target all major mobile platforms.
Novel technical frameworks for information integration and tool interoperability such as Architecture-Driven Modernization (ADM) proposed by the Object Management Group (OMG) can help to manage a huge diversity of mobile technologies. The Architecture-Driven Modernization Task Force (ADMTF) was formed to create specifications and promote industry consensus on the modernization of existing applications. In this work, we propose a migration process from C/C++ software to different mobile platforms that integrates ADM standards with Haxe. We exemplify the different steps of the process with a simple case study, the migration of “the Set of Mandelbrot” C++ application.
The proposal was validated in Eclipse Modeling Framework considering that some of its tools and run-time environments are aligned with ADM standards
On-demand provisioning of educational cloud-based services
[ES] El objetivo de este proyecto es facilitar la creación de nuevos entornos de capacitación en las aulas de las instituciones educativas, lo que permite a los docentes e investigadores aprovechar los medios tecnológicos al facilitar rápidamente el acceso y la organización de la información. Por esta razón, se presenta la implementación de un orquestador de servicios en la nube basado en el enfoque de la arquitectura dirigida por modelos (MDA), proporcionando así un acceso rápido a recursos y servicios basados en lecciones educativas interactivas. Los resultados del proyecto se utilizarán en la Nube Educativa de Małopolska (MCHE), el cual es un entorno educativo que conecta aproximadamente 150 escuelas con 10 universidades.[EN] The purpose of this project is to ease the creation of new training environments in the classrooms of educational institutions, allowing teachers and researchers to take advantage of technological means by promptly facilitating access and organization of information. For this reason, the implementation of an orchestrator of cloud services based on the Model Driven Architecture (MDA) approach is presented, thus providing quick access to resources and services which are based on interactive educational lessons. The results of the project will be used in the Małopolska Educational Cloud (MCHE), which is an educational environment connecting approximately 150 schools with 10 universities.Llopis Gandía, R. (2020). Aprovisionamiento bajo demanda de servicios educativos basados en la nube. http://hdl.handle.net/10251/149614TFG
Conformance Checking and Simulation-based Evolutionary Optimization for Deployment and Reconfiguration of Software in the Cloud
Many SaaS providers nowadays want to leverage the cloud's capabilities also for their existing applications, for example, to enable sound scalability and cost-effectiveness. This thesis provides the approach CloudMIG that supports SaaS providers to migrate those applications to IaaS and PaaS-based cloud environments. CloudMIG consists of a step-by-step process and focuses on two core components. (1) Restrictions imposed by specific cloud environments (so-called cloud environment constraints (CECs)), such as a limited file system access or forbidden method calls, can be validated by an automatic conformance checking approach. (2) A cloud deployment option (CDO) determines which cloud environment, cloud resource types, deployment architecture, and runtime reconfiguration rules for exploiting a cloud's elasticity should be used. The implied performance and costs can differ in orders of magnitude. CDOs can be automatically optimized with the help of our simulation-based genetic algorithm CDOXplorer. Extensive lab experiments and an experiment in an industrial context show CloudMIG's applicability and the excellent performance of its two core components
The Derivation of a pragmatic requirements framework for web development.
Web-based development is a relatively immature area of Software Engineering, producing often complex applications to many different types of end user and stakeholders. Web Engineering as a research area, was created to introduce
processes that enable web based development to be repeatable and to avoid potential failure in the fast changing landscape that is the current ubiquitous
Internet. A survey of existing perspectives from the literature highlights a number of points. Firstly, that web development has a number of subtle differences to
Software Engineering and that many web development methods are not used. Further, that there has been little work done on what should be in a web development method. A full survey of 50 web development methods finds that they do not give enough detail to be used in their entirety; they are difficult for a non-computer scientist to understand in the techniques they use and most do not cover the lifecycle, particularly in the area of requirements, implementation and
testing. This thesis introduces a requirements framework for novice web developers. It is created following an in-depth case study carried out over two years that
investigates the use of web development methods by novice developers. The study finds that web development methods are not easy to understand, there is a lack of explanation as to how to use the techniques within the method and the language used is too complex. A high level method is derived with an iterative process and with the requirements phase in the form of a framework; it addresses the problems
that are discussed and provides excellent support for a novice web developer in the requirements phase of the lifecycle. An evaluation of the method using a group of
novice developers who reflect on the method and a group who use it for development finds that the method is both easy to understand and use
Intensional Cyberforensics
This work focuses on the application of intensional logic to cyberforensic
analysis and its benefits and difficulties are compared with the
finite-state-automata approach. This work extends the use of the intensional
programming paradigm to the modeling and implementation of a cyberforensics
investigation process with backtracing of event reconstruction, in which
evidence is modeled by multidimensional hierarchical contexts, and proofs or
disproofs of claims are undertaken in an eductive manner of evaluation. This
approach is a practical, context-aware improvement over the finite state
automata (FSA) approach we have seen in previous work. As a base implementation
language model, we use in this approach a new dialect of the Lucid programming
language, called Forensic Lucid, and we focus on defining hierarchical contexts
based on intensional logic for the distributed evaluation of cyberforensic
expressions. We also augment the work with credibility factors surrounding
digital evidence and witness accounts, which have not been previously modeled.
The Forensic Lucid programming language, used for this intensional
cyberforensic analysis, formally presented through its syntax and operational
semantics. In large part, the language is based on its predecessor and
codecessor Lucid dialects, such as GIPL, Indexical Lucid, Lucx, Objective
Lucid, and JOOIP bound by the underlying intensional programming paradigm.Comment: 412 pages, 94 figures, 18 tables, 19 algorithms and listings; PhD
thesis; v2 corrects some typos and refs; also available on Spectrum at
http://spectrum.library.concordia.ca/977460
The derivation of a pragmatic requirements framework for web development
Web-based development is a relatively immature area of Software Engineering, producing often complex applications to many different types of end user and stakeholders. Web Engineering as a research area, was created to introduce processes that enable web based development to be repeatable and to avoid potential failure in the fast changing landscape that is the current ubiquitous Internet. A survey of existing perspectives from the literature highlights a number of points. Firstly, that web development has a number of subtle differences to Software Engineering and that many web development methods are not used. Further, that there has been little work done on what should be in a web development method. A full survey of 50 web development methods finds that they do not give enough detail to be used in their entirety; they are difficult for a non-computer scientist to understand in the techniques they use and most do not cover the lifecycle, particularly in the area of requirements, implementation and testing. This thesis introduces a requirements framework for novice web developers. It is created following an in-depth case study carried out over two years that investigates the use of web development methods by novice developers. The study finds that web development methods are not easy to understand, there is a lack of explanation as to how to use the techniques within the method and the language used is too complex. A high level method is derived with an iterative process and with the requirements phase in the form of a framework; it addresses the problems that are discussed and provides excellent support for a novice web developer in the requirements phase of the lifecycle. An evaluation of the method using a group of novice developers who reflect on the method and a group who use it for development finds that the method is both easy to understand and use.EThOS - Electronic Theses Online ServiceGBUnited Kingdo
An OMG model-based approach for aligning information systems requirements and architectures with business
Tese de Doutoramento (Programa Doutoral em Tecnologias e Sistemas de Informação)The challenges involved in developing information systems (which are able to adapt to rapidly
changing business and technological conditions) are directly related to the importance of their
alignment with the business counterpart. These challenges comprise issues that cross management
and information systems domains, relating and aligning them in order to attain superior
performance for the organization, while identifying its strategy and tailoring its business processes.
As this relation is increasingly intertwined its concepts are conducted to pragmatic methods,
incorporating both management and information systems components, for how, when and where
this alignment really matters.
The related topics of the alignment between business and information systems comprise diverse
paths of research, though with little common ground established inside the community, where
problems arouse due to the fast moving business and technological environments. According to
these circumstances, the process of developing information systems to support the alignment
benefits from incorporating the use of structured and model-based approaches. So, as the
development of evermore complex information systems presents a challenge for the currently
available methods, the use of models to support the alignment with business stands as an
increasingly important issue.
Following those challenges, we set out to question how to develop solutions aligning information
systems with business in a model-based approach. Accordingly, we support our research on the
need to understand what are the perspectives involved in aligning information systems with
business, and, moreover, to comprehend in what sense model adoption drives information systems
development. So, the proposed goals for this thesis are: (1) set the basis for the elicitation of
business requirements in order to support a well-grounded development of information systems; (2)
provide for the generation of business models based on the business requirements, while assuring
their alignment and traceability; and (3) arrange for the derivation of information system
architectures from the business requirements, while attaining alignment and traceability for their
mutual transformation and adaptation.
Several issues surrounding these goals have already been described and approached in diverse
ways by other researchers, where existing approaches and associated methods achieved good
results. Nevertheless, these approaches are not without their shortfalls, sometimes failing to present
a complete solution, others being unable to adapt to new challenges, or even incapable of reacting
to recent trends. In order to tackle these issues we propose to build upon those approaches by
adapting, evolving and innovating on solutions in each of the three proposed goals, respectively
intertwining with perspectives from related standards and reference models.
Answering the first goal, in what regards the main contributions of this thesis, we propose to
broaden the elicitation of requirements by relating functional and nonfunctional requirements from
business processes. So, we present a unified metamodel representation for those requirements,
accompanied by a customizable method for their joint elicitation, based-on business-driven
use-cases, goals and rules. This approach adopts the Rational Unified Process (RUP) development methodology and the Business Motivation Model (BMM) standard model language representation
for business requirements. Moreover, the metamodel representation and method operationalization
are accompanied by a prototype support tool that completes this first contribution.
For the second goal, a more business-oriented one correlated to the higher-level requirements, we
propose to generate business models directly from the inferred functional and nonfunctional
requirements. So, we present a three-dimensional approach built on the relation of the referred
requirements with the Balanced Scorecard (BSC) reference model, where an additional mapping to
the Business Model Canvas (BMC) is also made available. This proposal provides an associated
metamodel representation for the relation between the elements involved and a customizable
method for their operationalization, all accompanied by a prototype support tool.
On the third goal, focused on system architectures and connected to the lower-level requirements,
we propose to derive service-oriented participants from the functional requirements, while aligning
the nonfunctional requirements with the quality characteristics of the solution to-be. First, we
present an evolution of an existing method for the derivation of a logical architecture, in order to
adapt it to a service-oriented approach (SOA). Then, following on the existing relation between the
nonfunctional and functional side of the low-level requirements, our approach is able to associate
these last with its related services on the derived architecture, in another three-dimensional
approach. Additionally, a mapping of the nonfunctional requirements with the system quality
characteristics (CISQ) is made available. Once more, an associated metamodel, a customizable
method and a prototype support tool are also provided.
The development of these three approaches is supported through the execution of tasks which
originate artifacts and lead to publications associated to their respective research and development
efforts, all according to the Design Science Research (DSR) methodology. These are applied in
ongoing projects involving experimental scenarios in industrial settings and associated to
established research reference patterns, balancing the interests of both researchers and
practitioners while focused both on technology and management audiences. The results obtained
from their evaluation reflect the quality and depth of our findings, helping to validate the scientific
contribution of this work.Os desafios implicados no desenvolvimento de sistemas de informação (que sejam capazes de se
adaptar a condições tecnológicas e de negócios em rápida mutação) estão diretamente
relacionados à importância do seu alinhamento com a contraparte do negócio. Esses desafios
envolvem questões que cruzam os domínios da gestão e dos sistemas de informação,
relacionando-os e alinhando-os com o intuito de alcançar um desempenho superior para a
organização, ao mesmo tempo que identificam a sua estratégia e adequam os seus processos de
negócio. Como esta relação está cada vez mais interligada, os seus conceitos são canalizados para
métodos pragmáticos, incorporando ambos os componentes de sistemas de informação e de
gestão, para saber como, quando e onde este alinhamento realmente interessa.
Os tópicos relacionados com o alinhamento entre negócio e sistemas de informação abrangem
diversos caminhos de pesquisa, embora com poucos alicerces em comum estabelecidos dentro da
comunidade, onde os problemas surgem devido às rápidas mudanças nos negócios e nos
ambientes tecnológicos. De acordo com estas circunstâncias, o processo de desenvolvimento de
sistemas de informação para apoiar o alinhamento beneficia de incorporar o uso de abordagens
estruturadas e baseadas em modelos. Assim, dado que o desenvolvimento de sistemas de
informação cada vez mais complexos apresenta um desafio para os métodos atualmente
disponíveis, o uso de modelos para apoiar o alinhamento com o negócio destaca-se como uma
questão cada vez mais importante.
Em linha com esses desafios, estabelecemos a questão de como desenvolver soluções para alinhar
sistemas de informações com o negócio numa abordagem baseada em modelos. Neste sentido,
apoiamos a nossa pesquisa na necessidade de compreender quais são as perspetivas envolvidas
no alinhamento dos sistemas de informação com o negócio, e, além disso, de compreender em
que sentido a adoção de modelos capacita o desenvolvimento desses sistemas. Assim, os objetivos
propostos para esta tese são: (1) definir as bases para o levantamento de requisitos de negócio a
fim de suportar um desenvolvimento bem fundamentado de sistemas de informação; (2)
disponibilizar a geração de modelos de negócio baseados nos requisitos de negócio, garantindo o
alinhamento e a rastreabilidade entre ambos; e (3) estruturar a derivação de arquiteturas de
sistema de informação a partir dos requisitos de negócio, preservando o alinhamento e
rastreabilidade para a sua mútua transformação e adaptação.
Várias questões envolvendo estes objetivos foram já descritas e tratadas de diversas maneiras por
outros investigadores, tendo as abordagens existentes e os métodos associados alcançado bons
resultados. No entanto, essas abordagens têm as suas lacunas, umas vezes falham em apresentar
uma solução completa, noutras são ineficientes ao se adaptarem a novos desafios, ou mesmo
incapazes de reagir às novas tendências. Para lidar com estas questões, propomo-nos apoiar
nessas abordagens, adaptando, evoluindo e inovando em soluções para cada um dos três objetivos
propostos, intersetando-as, respetivamente, com perspetivas de modelos de referência e padrões
relacionados.
Relativamente ao primeiro objetivo, no que concerne aos principais contributos desta tese,
propomos alargar o levantamento de requisitos, relacionando os requisitos funcionais e nãofuncionais
dos processos de negócios. Assim, apresentamos um meta-modelo para a
representação unificada desses requisitos, acompanhado por um método personalizável para o seu levantamento conjunto, baseada em casos-de-uso, metas e regras orientadas a negócio. Esta
abordagem adota a metodologia de desenvolvimento do Rational Unified Process (RUP) e a
representação padrão do modelo de linguagem do Business Motivation Model (BMM), para os
requisitos de negócio. Além disso, a representação meta-modelo e a operacionalização do método
são acompanhados por um protótipo de uma ferramenta de suporte que completa esta primeira
contribuição.
Quanto ao segundo objetivo, mais orientado ao negócio e correlacionado com os requisitos de nível
superior, propomos gerar modelos de negócio a partir dos requisitos funcionais e não-funcionais
inferidos. Assim, apresentamos uma abordagem tridimensional, construída sobre a relação dos
referidos requisitos com o modelo de referência do Balanced Scorecard (BSC), em que um
mapeamento adicional para o Business Model Canvas (BMC) é também disponibilizado. Esta
proposta inclui um meta-modelo para representação da relação entre os elementos envolvidos e
um método personalizável para a sua operacionalização, tudo acompanhado por um protótipo de
uma ferramenta de suporte.
No terceiro objetivo, focado em arquiteturas de sistema e ligado aos requisitos de nível inferior,
propomos derivar participantes orientados-a-serviços desde os requisitos funcionais, alinhando os
requisitos não-funcionais com as características de qualidade da solução a obter. Primeiro,
apresentamos uma evolução de um método existente para a derivação de uma arquitetura lógica,
adaptando-o a uma abordagem-orientada-a-serviços (SOA). Assim, prosseguindo a relação existente
entre o lado não-funcional e funcional dos requisitos de baixo nível, a nossa abordagem associa
estes últimos com os serviços relacionados na arquitetura derivada, numa outra abordagem
tridimensional. Além disso, um mapeamento dos requisitos não-funcionais com as características
de qualidade do sistema (CISQ) é disponibilizado. Mais uma vez, um meta-modelo associado, um
método personalizável e um protótipo da ferramenta de suporte são disponibilizados.
O desenvolvimento destas três abordagens é suportado pela execução de tarefas, as quais dão
origem a artefatos e levam a publicações associadas aos seus esforços de pesquisa e
desenvolvimento respetivamente, tudo de acordo com a metodologia DSR. Estas são aplicadas a
projetos em andamento, os quais envolvem cenários experimentais em ambientes industriais e
associados a padrões de investigação de referência, equilibrando os interesses de investigadores e
profissionais assim como dos diferentes públicos de tecnologia e gestão. Os resultados obtidos na
sua avaliação refletem a qualidade e a profundidade dos nossos resultados, ajudando a validar a
contribuição científica deste trabalho
Semantic discovery and reuse of business process patterns
Patterns currently play an important role in modern information systems (IS) development and their use has mainly been restricted to the design and implementation phases of the development lifecycle. Given the increasing significance of business modelling in IS development, patterns have the potential of providing a viable solution for promoting reusability of recurrent generalized models in the very early stages of development. As a statement of research-in-progress this paper focuses on business process patterns and proposes an initial methodological framework for the discovery and reuse of business process patterns within the IS development lifecycle. The framework borrows ideas from the domain engineering literature and proposes the use of semantics to drive both the discovery of patterns as well as their reuse
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