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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.
61

Modellbasierter Systems Engineering Ansatz zur effizienten Aufbereitung von VR-Szenen

Mahboob, Atif, Husung, Stephan, Weber, Christian, Liebal, Andreas, Krömker, Heidi 03 January 2020 (has links)
Ein wesentliches Ziel während der Produktentwicklung ist die frühzeitige Absicherung der Produkteigenschaften auf Basis der definierten Produktmerkmale unter Beachtung der äußeren Randbedingungen. Digitale Modelle und Methoden unterstützen den Produktentwickler bei der frühzeitigen virtuellen Evaluation des Produktes. [...] In diesem Beitrag wird eine Methodik präsentiert, die mit Hilfe der SysML-Modelle eine Simulation in VR ermöglicht. Die SysML-Beschreibung wird als Kern der Simulation dienen und das gesamte Simulationsmodell steuern. Weiterhin wird erläutert, wie die SysML-Beschreibung mit einem VR-Tool und einem Physikberechnungstool verbunden werden kann. Die in CAVE und HMD durchgeführten Simulationen wurden im Rahmen von Usability Tests evaluiert. Aus diesen Tests werden Ergebnisse präsentiert, die sich mit Verwendungsschwerpunkten in VR und der Zufriedenheit bei der Beurteilung von Produkten in VR beschäftigt haben. Schlussendlich wird ein Beispiel-Simulationsszenario in der CAVE-VR und einem Head Mounted Display (HMD) diskutiert. [... aus der Einleitung]
62

Collaborative Construction of Telecommunications Services. An Enterprise Architecture and Model Driven Engineering Method

CHIPRIANOV, Vanea 16 January 2012 (has links) (PDF)
In the context of world economies transitioning to services, telecommunications services are the primary means of communication between different economic entities and are therefore essential. The focus on the end consumer, the convergence with the Internet, the separation between the software and the hardware implementing a service, and the telecommunications market deregulation have led to a revolution and a new era in the telecommunications industry. To meet these challenges, former national telecommunications providers have to reduce the construction time, from months to days, while affecting non-negatively other parameters (e.g., cost, quality of service, quality of experience) of new telecommunications services. To tackle this broad theme, we propose a telecommunications service construction process, the software tools that are to be used in this process and a tool building process to build them. The telecommunications service construction process reflects current practices in the telecommunications industry. As such, it should be (easily) accepted by practitioners. The software tools (i.e., Domain Specific Modeling Languages designed as profiles of an Enterprise Architecture Modeling Language, graphical editors, code generators, Off the Shelf network simulators, a collaboration Design Rationale Domain Specific Modeling Language) help telecommunications providers face the challenges. The tool building process relies on models and provides a high automation degree, hence software tools can be build more rapidly. We illustrate the telecommunications service construction process and the tools using a multimedia conferencing service. Our proposals contribute to reducing the construction time of new telecommunications services, while providing the possibility of improved quality of service and increased involvement of the consumer. Faster provisioning of new telecommunications services, that better answer the consumers¿ needs, will increase the rate of development of new economic services in general, and will ultimately have a positive impact on world economic development.
63

[en] A MODELING LANGUAGE FOR AGENT BASED SYSTEMS / [pt] UMA LINGUAGEM DE MODELAGEM PARA SISTEMAS BASEADOS EM AGENTES

RICARDO CHOREN NOYA 20 August 2004 (has links)
[pt] A tecnologia de agentes tem ganho destaque, tanto na academia quanto na indústria, no que se refere ao desenvolvimento de sistemas distribuídos. Linguagens de modelagem e processos de desenvolvimento foram criados para documentar e formalizar o desenvolvimento de sistemas baseados em agentes. Entretanto, as linguagens de modelagem existentes ou se baseiam em noções de uma tecnologia de desenvolvimento anterior (orientação a objetos) ou não possuem artefatos (modelos) que denotam as características de agência existentes no sistema. Esta tese propõe uma linguagem de modelagem para sistemas baseados em agentes, a LM-SMA, que gera artefatos (modelos) que mostram a modelagem de aspectos de agência, tais como adaptação, aprendizado, interação e autonomia. A LM-SMA ainda possui artefatos que permitem a modelagem da parte do sistema que não é composta por agentes, por meio de ontologias. / [en] The agent technology is gaining acceptance, both in academy and industry, with regards to distributed systems development. Modeling languages and development processes were created to formalize the development of agent based systems. Nevertheless, existing modeling languages are either based on previous development methods (object oriented) or they do not have artifacts (models) that show the agency characteristics that exist in a system. This thesis proposes a modeling language, for agent based systems, that generates artifacts that model agency aspects, such as adaptation, learning, interaction and autonomy. The language has artifacts that allow the modeling of the non- agent part of an agent based system, using ontology.
64

[en] INTRODUCING A VARIABILITY INTO DEVELOPMENT OF MULTI-AGENT SYSTEMS / [pt] INTRODUZINDO VARIABILIDADE NO DESENVOLVIMENTO DE SISTEMAS MULTI-AGENTES

GUILHERME NASCIMENTO PATE SANTOS 22 August 2007 (has links)
[pt] As linguagens de modelagem de agentes visam representar o sistema e seus agentes através de diagramas, os quais permitem explicitar seus objetivos, planos e ações. Mesmo as linguagens fornecendo todos esses mecanismos de representação, alguns sistemas ainda não podem ser expressos de maneira ideal, pois tais linguagens visam representar sistemas inteiros e não uma linha de produção com várias instâncias. O método proposto visa num primeiro momento determinar o mapeamento dos pontos de flexibilização em agentes de software. Planos e ações podem ser flexibilizados por apresentarem características de variabilidade. A variabilidade pode ser interpretada de duas formas: a variabilidade de planos que possibilita que um agente tenha vários planos distintos, acarretando aplicações distintas em função do seu plano; e a variabilidade de ações que possibilita que ações sejam executadas de maneiras distintas o que também acarreta aplicações distintas. Com isso podem ser observadas ações e planos abstratos que serão herdados por outras ações e planos concretos e que definirão uma instância para novas aplicações. Para isto o método proposto utiliza diagramas, tags e documentação para guiar a instanciação dos planos e ações. Esses agentes gerarão instâncias de aplicações devido seus planos e ações os quais determinam uma linha de produto de software e conseqüentemente a idéia de framework. Esta abordagem traz para o mundo dos agentes as vantagens observadas com o uso destas técnicas em orientação a objeto. Além disso, as linguagens atuais poderão utilizar concomitantemente tal método. Os benefícios da solução serão apresentados através de estudos de caso. / [en] The current agents´ modeling languages aim at representing the system and theirs agents in a clear way by diagrams, which permit shows theirs goals, plans and actions. Even with all provided by the language, some systems can´t be represented a correct form yet, because the current agents´ modeling languages represent only a whole system and not a product line. In this way the method proposed tries to determine a mapping of the flexibility points into software agents. The flexibility points into agents are defined to theirs plans and actions. Such points can be flexible if show a variability characteristic. The variability is presented by two points of view: the variability of plans and variability of action, where the variability of plans can enable many distinct plan for an agent, in other words, accept distinct applications for each one of theirs plans; and the variability of actions that enable the actions are executed in distinct form that result in distinct applications. With that, we can see an abstract actions and abstract plans will be inherited by the concrete actions and concrete plans, and that in the future will define new applications. For this the method uses the diagrams, tags and documentation. The documentation is used like a guide in a plan instance and action instance. After, these agents can generate the instance of new applications by yours owner plans and actions that´s determine the software product line and consequently it is possible to use the framework idea. With this approach it is possible to introduce into agent world all the advantage of frameworks and product lines, techniques that are traditionally used in object orientation. Moreover, the approach can be used concomitantly with current agents´ modeling languages. The benefits of the approach will be shown in more details through a case study.
65

On Using UML Diagrams to Identify and Assess Software Design Smells

Haendler, Thorsten January 2018 (has links) (PDF)
Deficiencies in software design or architecture can severely impede and slow down the software development and maintenance progress. Bad smells and anti-patterns can be an indicator for poor software design and suggest for refactoring the affected source code fragment. In recent years, multiple techniques and tools have been proposed to assist software engineers in identifying smells and guiding them through corresponding refactoring steps. However, these detection tools only cover a modest amount of smells so far and also tend to produce false positives which represent conscious constructs with symptoms similar or identical to actual bad smells (e.g., design patterns). These and other issues in the detection process demand for a code or design review in order to identify (missed) design smells and/or re-assess detected smell candidates. UML diagrams are the quasi-standard for documenting software design and are often available in software projects. In this position paper, we investigate whether (and to what extent) UML diagrams can be used for identifying and assessing design smells. Based on a description of difficulties in the smell detection process, we discuss the importance of design reviews. We then investigate to what extent design documentation in terms of UML2 diagrams allows for representing and identifying software design smells. In particular, 14 kinds of design smells and their representability in UML class and sequence diagrams are analyzed. In addition, we discuss further challenges for UML-based identification and assessment of bad smells.
66

[en] MDA BASED APPROACH FOR DEVELOPING MULTI-AGENT SYSTEMS / [pt] USANDO A ABORDAGEM MDA NO DESENVOLVIMENTO DE SISTEMAS MULTI-AGENTES

BEATRIZ ALVES DE MARIA 17 June 2005 (has links)
[pt] Sistemas multi-agentes (SMA) diferem de sistemas que não são baseados em agentes devido ao fato dos agentes serem unidades autônomas capazes de ações flexíveis e inteligentes. Por este motivo é proposto na literatura um grande número de metodologias, frameworks e linguagens para dar apoio a construção deste tipo de sistema. Muitas dessas metodologias e suas ferramentas provêm da comunidade de inteligência artificial e estão focadas em uma arquitetura específica de agentes. Este trabalho propõe o uso da arquitetura Model Driven Architecture (MDA), descrita pela OMG, no processo de desenvolvimento de SMA. MDA é uma arquitetura para desenvolvimento de software estruturada em etapas de modelagem que dá suporte a todo o ciclo de desenvolvimento de um sistema. O processo de desenvolvimento proposto está dividido de acordo com as etapas apresentadas por MDA. Na etapa PIM, onde são especificados modelos independentes de plataforma, propomos a utilização da linguagem de modelagem MAS-ML para SMA. Na etapa PSM, onde são definidos modelos específicos de plataforma, propomos utilizar a linguagem de modelagem UML. Os modelos MAS-ML definidos na etapa PIM são transformados em modelos UML na etapa PSM com base em um framework para implementação de SMA utilizando orientação a objetos. Na ultima etapa do desenvolvimento, o código da aplicação é gerado a partir dos modelos UML. Este trabalho detalha as etapas PIM e PSM do processo de desenvolvimento de SMA e as transformações necessárias para a geração de código. Para demonstrar a aplicação do processo proposto são apresentadas duas aplicações de SMA desenvolvidas utilizando o mesmo. Ao final, apresenta-se a ferramenta MAS-ML Tool desenvolvida para dar apoio ao processo de desenvolvimento proposto. Esta ferramenta implementa todas as etapas presentes no processo, permitindo assim a implementação de SMA a partir de sua modelagem. / [en] Multi-agent systems (MAS) differ from non-agent systems because agents are intended to be autonomous units capable of flexible and intelligent actions. For this reason it is proposed in the literature a great number of methodologies frameworks and languages to support the development of these systems. Several methodologies and their tools are come from artificial intelligent community and are focused in a specific agent architecture. This work proposes the use of the Model Driven Architecture (MDA), described by OMG, in the development process of MAS. MDA specifies a structured software development process in modeling stages that supports all system development life cycle. The proposed development process is divided according to the MDA stages. In PIM stage, where platform independent models are specified, we propose the use of MAS-ML modeling language for MAS. In PSM stage, where platform specific models are specified, we propose the use of UML modeling language. The MASML models defined on PIM stage are transformed in UML models at PSM stage, based on an object-oriented framework for implementing MAS. In the last development stage, the application code is generated from UML models. This work details the PIM and PSM stages of the MAS development process and the models transformations to generate source code. To exemplify the applicability of the proposed MAS development process, two different MAS applications were developed based on the process. Finally, a MAS-ML tool is presented. Such tool was developed to support the proposed development process. The tool implements all stages presented in the process, allowing the modeling and implementation of MAS.
67

Arquitetura informacional para gestão de relacionamento: um estudo em uma instituição de ensino superior privada

Trindade, Mauricio Fontoura 19 September 2008 (has links)
Made available in DSpace on 2015-03-05T19:13:44Z (GMT). No. of bitstreams: 0 Previous issue date: 19 / Nenhuma / A presente pesquisa propõe a estruturação de uma Arquitetura Informacional para Gestão de Relacionamento com Alunos de Instituição de Ensino Superior (IES) privada, com base na coleta e análise dos dados do Plano de Desenvolvimento Institucional (PDI), na observação participante e nos grupos de foco com alunos e gestores da Instituiçao de Ensino Superior (IES) em estudo. Os temas que tratam de vantagem competitiva e cadeia de valor, estratégias direcionadas ao lucro e rentabilidade, Customer Relationship Management (CRM) e marketing de relacionamento apresentados no referencial teórico, orientam a identificação dos atributos e benefícios que envolvem o termo ‘relacionamento’ e que tenham representatividade para os alunos e gestores. Os temas que tratam de arquitetura informacional e Unified Modeling Language (UML) orientam a estruturação da Arquitetura Informacional. O estudo foi realizado em uma IES privada, localizada na cidade de Porto Alegre/RS, possuindo natureza aplicada com abordagem qualitativa e expl / This work proposes the structuring of Information Architecture for Relationship Management with students in a private higher education institution based on the gathering and analysis of the Institutional Development Plan data, on participative observation and on focus groups with students and management of the university being studied. The topics that deal with competitive advantage and value chain, strategies targeted at profit and profitability, Customer Relationship Management and relationship marketing presented in the theoretical content orientate the identification of the atributes and benefits entailed by the term relationship and that are meaningful to both students and management. The topics that deal with information architecture and Unified Modeling Language orientate the structuring of Information Architecture. The study was carried out in a private institution of higher education located in Porto Alegre/RS possessing an applied nature with a qualitative and exploratory approach enabling the compr
68

Ingéniérie dirigée par les modèles pour la gestion de la variabilité dans le test d'applications mobiles / Model-Driven Engineering for Variability Management in Mobile Application Testing

Ridene, Youssef 23 September 2011 (has links)
L'engouement du grand public pour les applications mobiles, dont le nombre ne cessede croître, a rendu les utilisateurs de plus en plus exigeants quant à la qualité de cesapplications. Seule une procédure de test efficace permet de répondre à ces exigences.Dans le contexte des applications embarquées sur téléphones mobiles, le test est unetâche coûteuse et répétitive principalement à cause du nombre important de terminauxmobiles qui sont tous différents les uns des autres.Nous proposons dans cette thèse le langage MATeL, un DSML (Domain-Specific ModelingLanguage) qui permet de d’écrire des scénarios de test spécifiques aux applicationsmobiles. Sa syntaxe abstraite, i.e. un méta modèle et des contraintes OCL, permet auconcepteur de manipuler les concepts métier du test d'applications mobiles (testeur, mobileou encore résultats attendus et résultats obtenus). Par ailleurs, il permet d'enrichirces scénarii avec des points de variabilité qui autorisent de spécifier des variations dansle test en fonction des particularités d'un mobile ou d'un ensemble de mobiles. La syntaxeconcrète de MATeL, qui est inspirée de celle des diagrammes de séquence UML,ainsi que son environnement basé sur Eclipse permettent à l'utilisateur de concevoir desscénarii relativement facilement.Grâce à une plateforme de test en ligne construite pour les besoins de notre projet,il est possible d'exécuter les scénarii sur plusieurs téléphones différents. La démarcheest illustrée dans cette thèse à travers des cas d'utilisation et des expérimentations quiont permis de vérifier et valider notre proposition. / Mobile applications have increased substantially in volume with the emergence ofsmartphones. Ensuring high quality and successful user experience is crucial to the successof such applications. Only an efficient test procedure allows developers to meet these requirements. In the context of embedded mobile applications, the test is costly and repetitive. This is mainly due to the large number of different mobile devices. In this thesis, we describe MATeL, a Domain-Specific Modeling Language (DSML) for designing test scenarios for mobile applications. Its abstract syntax, i.e. a meta model and OCL constraints, enables the test designer to manipulate mobile applications testing concepts such as tester, mobile or outcomes and results. It also enables him/her to enrich these scenarios with variability points in the spirit of Software Product-Line engineering, that can specify variations in the test according to the characteristics of one mobile or a set of mobiles. The concrete syntax of MATeL that is inspired from UML sequence diagrams and its environment based on Eclipse allow the user to easily develop scenarios. MATeL is built upon an industrial platform (a test bed) in order to be able to run scenarios on several different phones. The approach is illustrated in this thesis through use cases and experiments that led to verify and validate our contribution.
69

Modelagem de sistemas de informação para a mineração de processos: características e propriedades das linguagens / Information systems modeling for a process mining: characteristics and properties of languages

Teixeira Junior, Gilmar 03 May 2017 (has links)
Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2017-07-19T11:05:26Z No. of bitstreams: 2 Dissertação - Gilmar Teixeira Junior - 2017.pdf: 6982787 bytes, checksum: c52c456e0cb8184f1f7144d862bff726 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-07-19T11:05:52Z (GMT) No. of bitstreams: 2 Dissertação - Gilmar Teixeira Junior - 2017.pdf: 6982787 bytes, checksum: c52c456e0cb8184f1f7144d862bff726 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-07-19T11:05:52Z (GMT). No. of bitstreams: 2 Dissertação - Gilmar Teixeira Junior - 2017.pdf: 6982787 bytes, checksum: c52c456e0cb8184f1f7144d862bff726 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-05-03 / Storing information in large data repositories (Big Data) creates opportunities for Organizations to use Process Mining techniques to extract knowledge about the performance and actual flow of their processes of business. One of the fundamental elements for achieving this objective is the relationship between process modeling languages, process event logging (logs) and Process Mining algorithms. In this work, comparisons were made between three languages (BPMN, Petri Nets and YAWL) which are usually used to model business processes with respect to their capabilities of use in Process Mining, especially in Process Discovery. The models created were based on typical Workflow patterns and five scenarios were simulated for each language using three Process Discovery algorithms (Alpha, Heuristic Miner and ILP Miner). The results indicate that the choice of the language used in the modeling and in recording of the business processes influences the quality of the results obtained by the Process Discovery algorithms. This work also presents suggestions for the development of process modeling languages and process mining algorithms. / O armazenamento das informações em grandes repositórios de dados (Big Data) geram oportunidades para que as Organizações utilizem técnicas de Mineração de Processos (Process Mining) para extrair conhecimento sobre o desempenho e o fluxo real de seus processos de negócio. Um dos elementos fundamentais para que este objetivo seja alcançado está na relação entre as linguagens de modelagem de processos, o registro dos eventos de processo (logs) e os algoritmos de Mineração de Processos. Neste trabalho, foram realizadas comparações entre três linguagens (BPMN, Redes de Petri e YAWL) normalmente utilizadas para modelar processos de negócio com respeito a suas capacidades de utilização na Mineração de Processos, em especial, na Descoberta de Processos. Os modelos criados foram baseados em padrões típicos de Workflow e cinco cenários foram simulados para cada linguagem utilizando três algoritmos de Descoberta de Processos (Alpha, Heuristic Miner e ILP Miner). Os resultados indicam que a escolha da linguagem utilizada na modelagem e no registro dos processos de negócio influencia na qualidade dos resultados obtidos pelos algoritmos de Descoberta de Processos. O trabalho também apresenta sugestões para o desenvolvimento das linguagens de modelagem de processos e dos algoritmos de Mineração de Processos.
70

Autoria de e-books Interativos: modelo conceitual fábulas e requisitos / Authorship of Interactive e-books: conceptual model fables and requirements

PINTO, Hedvan Fernandes 24 April 2017 (has links)
Submitted by Daniella Santos (daniella.santos@ufma.br) on 2017-11-23T13:50:49Z No. of bitstreams: 1 HedvanPinto.pdf: 2328772 bytes, checksum: d8b425eaee2ff4849509ead942f907ee (MD5) / Made available in DSpace on 2017-11-23T13:50:49Z (GMT). No. of bitstreams: 1 HedvanPinto.pdf: 2328772 bytes, checksum: d8b425eaee2ff4849509ead942f907ee (MD5) Previous issue date: 2017-04-24 / Nowadays, tablet and smartphones are commonly used by children for both entertainment and education. Interactive e-book for mobile devices offer a enhanced experience when compared to traditional books, being potentially more engaging and fun for readers. However, to explore the most interesting features in these environments, authors have scarce support. In the sense that there are not many high level support tools and that these features are usually only accessible programmatically. In this work, we intend to extract as main characteristics of interactive e-books and propose a model called Fábulas that allow authors to create declarative interactive e-books. The model was designed based on a systematic analysis of interactive e-books, authoring tools and authoring languages for multimedia applications. In addition, this dissertation presents a case study for an implementation of Fábulas for web browsers with Javascript and HTML and for a SceneSync language. / Hoje em dia, os tablets e smartphones são comumente usados por crianças tanto para entretenimento quanto para educação. E-books interativos em dispositivos móveis permitem uma experiência mais rica quando comparada com livros tradicionais, sendo potencialmente mais envolvente e divertido para os leitores. Contudo, para explorar os recursos mais interessantes nesses ambientes, os autores têm pouco suporte. No sentido de que não existem muitas ferramentas de apoio de nível elevado e que estas funcionalidades são normalmente acessíveis apenas através de programação. Neste trabalho, retendemos extrair as principais características de e-books interativos e propor um modelo chamadoFábulas que permite aos autores criarem e-books interativos declarativamente. O modelo foi concebido tomando como ponto de partida uma análise sistemática de e-books interativos, ferramentas de autoria e linguagens de autoria para aplicações multimídia. Além disso, esta dissertação apresenta um estudo de caso para a implementação de Fábulas para navegadores web com Javascript e HTML e para a linguagem SceneSync.

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