5 research outputs found

    Extending the Metaglue multi-agent system

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    Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.Includes bibliographical references (leaf 66).by Nimrod Warshawsky.M.Eng

    Agentenbasiertes Verwalten mit aktiven Dokumenten am Beispiel der Schadenbearbeitung

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    Die Arbeit zeigt Mƶglichkeiten fĆ¼r die Verwendung sogenannter aktiver Dokumente, auf Softwareagenten beruhende Strukturen, fĆ¼r verwaltungsorientierte GeschƤftsprozesse auf. Dabei wird auf das VerstƤndnis vom Begriffs des Softwareagenten in verschiedenen Informatikdisziplinen eingegangen. Ein Beispielsystem fĆ¼r die Schadenbearbeitung in Versicherungsunternehmen wird vorgestellt

    Uso de agentes de interface para adequaĆ§Ć£o de bate-papos ao contexto de educaĆ§Ć£o a distancia

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    Orientador: Heloisa Vieira da RochaDissertaĆ§Ć£o (mestrado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e ComputaĆ§Ć£o CientificaResumo: O grande crescimento da Internet nos Ćŗltimos anos a tornou um importante veĆ­culo de comunicaĆ§Ć£o. Aliado a esse crescimento, a EducaĆ§Ć£o a DistĆ¢ncia (EaD), caracterizada pela separaĆ§Ć£o geogrĆ”fica entre o aluno e o professor, vem atingindo uma quantidade cada vez maior de pessoas das mais diversas culturas em muitos lugares ao redor do mundo. A EducaĆ§Ć£o a DistĆ¢ncia via Internet, utilizando ambientes de EducaĆ§Ć£o a DistĆ¢ncia Ć© cada vez mais freqĆ¼ente. Esses ambientes de EaD permitem a criaĆ§Ć£o, ediĆ§Ć£o e acompanhamento de cursos por meio de diversas ferramentas como fĆ³runs de discussĆ£o, correio eletrĆ“nico, bate-papo, material de apoio, etc. Na literatura, diversos autores apontam a construĆ§Ć£o de um senso de comunidade em um curso de EaD como fator importante e que influencia positivamente as relaƧƵes estabelecidas entre os participantes do curso. Nesse sentido, as ferramentas de comunicaĆ§Ć£o, dentre elas o bate-papo, auxiliam os usuĆ”rios a constituĆ­rem sua identidade perante a comunidade de aprendizagem. As ferramentas de bate-papo existentes nos ambientes de EaD mantĆ©m as mesmas caracterĆ­sticas fundamentais dos bate-papos tradicionais existentes na Web. Muitas dessas caracterĆ­sticas nĆ£o sĆ£o adequadas ao contexto de educaĆ§Ć£o. O objetivo deste trabalho Ć© a construĆ§Ć£o de uma ferramenta de bate-papo que seja adequada ao contexto educacional e possibilite a adoĆ§Ć£o de alguma forma de coordenaĆ§Ć£o Ć s conversas sĆ­ncronas realizadas em ambientes de EducaĆ§Ć£o a DistĆ¢ncia, especialmente o ambiente TelEduc. Na construĆ§Ć£o da ferramenta ChEd (Chat Educacional) foi feita uma anĆ”lise da literatura e das necessidades dos usuĆ”rios do TelEduc para a definiĆ§Ć£o de alguns modelos prĆ©-definidos de coordenaĆ§Ć£o para sessƵes de bate-papo. Aliados a esses modelos prĆ©-definidos, existe a possibilidade da configuraĆ§Ć£o, por parte do usuĆ”rio, de um modelo personalizado. Para prover essa flexibilidade, foi utilizada a tecnologia de Agentes de Interface, buscando integrar as Ć”reas de InteligĆŖncia Artificial e EducaĆ§Ć£o. Neste trabalho ainda sĆ£o apresentados os resultados de alguns testes preliminares realizados com o ChEd que apontam a necessidade do aprimoramento da ferramentaAbstract: An outstanding growth of Internet in the last years turned it into an important communication medium. In addition to that, distance education methods (EaD), characterized by a geographical separation between students and teachers, kept reaching an increasing amount of people with varying cultures around the world. With the application of distance education over the Internet, the use of Learning Management Systems (LMS) became a popular practice. As a result, EaD environments started to offer several tools for the creation, edition and attendance of courses like forums, electronic mail, chat, support material, along with others. Many authors point out the construction of a community sense as an important factor during a EaD process, because it influences the established relationship among course participants. In that sense, chat tools represent some of the best alternatives to help users constitute their identity in the learning community. However, current LMS's chat tools maintain the traditional web chats fundamental characteristics, which are not all appropriate for an educational purpose. Thus, the objective of this work is to build a chat tool suitable for an educational context, that should coordinate some LMS's synchronous conversations, focusing the TelEduc environment. An analysis of specialized literature and TelEduc users needs was made during the ChEd (Educational Chat) building process, in order to define some chat session coordination models. Together with those pre-defined models, the possibility of configuring a personalized one was also incorporated to the system, with the use of Interface Agents. Such feature aimed to provide better flexibility, by integrating Artificial Intelligence and Educational concepts. This work still presents the results of tests made using ChEd, that indicate the need of some upgradesMestradoMestre em CiĆŖncia da ComputaĆ§Ć£

    Multi-agent model to formative assessment support at learning

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    Orientador: Heloisa Vieira da RochaTese (doutorado) - Universidade Estadual de Campinas, Instituto de ComputaĆ§Ć£oResumo: A ComunicaĆ§Ć£o Mediada por Computador (CMC) introduziu novas possibilidades Ć  EducaĆ§Ć£o a DistĆ¢ncia (EaD), favorecendo a adoĆ§Ć£o de abordagens inovadoras de ensino-aprendizagem, mais centradas no aluno, na interaĆ§Ć£o, na colaboraĆ§Ć£o, na reflexĆ£o e na construĆ§Ć£o do conhecimento. Novas possibilidades foram introduzidas tambĆ©m Ć  avaliaĆ§Ć£o a distĆ¢ncia, sendo possĆ­vel a passagem de uma abordagem de avaliaĆ§Ć£o tradicional baseada em testes cumulativos para uma avaliaĆ§Ć£o mais formativa e alinhada com essas novas abordagens pedagĆ³gicas. As avaliaƧƵes formativas a distĆ¢ncia podem ser realizadas por meio do acompanhamento e orientaĆ§Ć£o contĆ­nuos das participaƧƵes dos aprendizes ao longo de desenvolvimento de atividades de aprendizagem nos ambientes de EaD, tendo como objetivo apoiar os processos de aprendizagem em andamento e a abordagem pedagĆ³gica adotada. ExperiĆŖncias prĆ”ticas com avaliaĆ§Ć£o formativa em cursos a distĆ¢ncia baseados em atividades de aprendizagem colaborativas e construcionistas tĆŖm revelado uma especial importĆ¢ncia por favorecer a percepĆ§Ć£o do comportamento dos aprendizes e a identificaĆ§Ć£o de problemas mesmo a distĆ¢ncia, possibilitando uma orientaĆ§Ć£o mais efetiva das aprendizagens em andamento, mesmo a distĆ¢ncia. No entanto, a maioria dos ambientes de EaD atual nĆ£o oferece recursos apropriados para o apoio a esta forma de avaliaĆ§Ć£o, restringindo-se ao registro das interaƧƵes decorrentes das atividades de aprendizagem desenvolvidas ao longo do curso. Assim, esse processo de avaliaĆ§Ć£o demanda muito trabalho e tempo do professor no acompanhamento, anĆ”lise e orientaĆ§Ć£o das participaƧƵes dos alunos, o que consiste num dos principais problemas da avaliaĆ§Ć£o formativa, seja ela presencial ou a distĆ¢ncia. Esta tese de doutorado defme um modelo de suporte Ć  avaliaĆ§Ć£o formativa para ambientes de EaD com o objetivo de reduzir os custos e favorecer a adoĆ§Ć£o desta modalidade de avaliaĆ§Ć£o. O modelo Ć© fundamentado nas pesquisas e recomendaƧƵes para avaliaƧƵes formativas de Perrenoud [2001] e Hadji [2001] e tambĆ©m em experiĆŖncias prĆ”ticas com avaliaĆ§Ć£o formativa em cursos a distĆ¢ncia baseados em atividades de aprendizagem colaborativas e construcionistas. A soluĆ§Ć£o tecnolĆ³gica Ć© baseada em um sistema multiagente (SMA) que provĆŖ suporte para Ć  avaliaĆ§Ć£o formativa em ambientes de EaD, por meio da exploraĆ§Ć£o da possibilidade de registro e posterior anĆ”lise de todas as interaƧƵes que ocorrem nos cursos a distĆ¢ncia. O modelo atua em duas frentes complementares: (1) apoiando o planejamento detalhado de atividades de aprendizagem a serem avaliadas, bem como a regulaĆ§Ć£o das participaƧƵes nessas atividades planejadas (por meio de notas e comentĆ”rios); e (2) reduzindo a quantidade de informaĆ§Ć£o a ser analisada, ajudando o formador na recuperaĆ§Ć£o e anĆ”lise de dados relevantes para a regulaĆ§Ć£o das participaƧƵes nas atividades planejadas, de acordo com os critĆ©rios de avaliaĆ§Ć£o defmidos no planejamento de cada atividade de aprendizagemAbstract: The Computer Mediated Communication (CMC) has introduced new possibilities to the Distance Education, making possible the adoption of innovative learner-centered pedagogical approaches based on interaction, collaboration, reflexion and knowledge construction. New possibilities has also been introduced to the online assessment, from traditional assessment, based on cumulative question and tests, to a more formative assessment aligned to these new pedagogical approaches. The online formative assessment is based on the continuous monitoring and regulation of leamer participation throughout the learning activities development, aiming to support the learning process based on the adopted pedagogical approaches. The experience in online courses based on collaborative and constructionist learning activities and on these activities formative assessment has revealed that this assessment approach is even more important in Distance Education, since it helps on the learners' behaviour perception as well as on the problems identification, making possible more effective advice in the . time of learning process, even at distance. Nevertheless, nowadays most Leaming Management Systems (LMSs) does oot present features designed to help this assessmeot approach. Thus, the educators need to take extra steps to monitor, to analyse and to advise the learning processo This scenario has been the maio problem of formative assessment, at face-to-face as well as at distance practices. This doctoral thesis proposes a Formative Assessment Support Model for LMSs, aiming to reduce the formative assessment costs. This model is based on Perreooud's [1999] and Hadji's [2001] researches and recommeodations to formative assessmeot and 00 our previous practices in online formative assessmeot based 00 collaborative and coostructionist learning activities. The technological support is based on a multiagent system (MAS) that provides support to formative assessmeot in LMSs, exploring the possibility of saving alI interactions in online courses for later analysis. The model acts 00 two complemeotary ways: (1) by supporting the planning of learning activities to be assessed as well as by supporting the educator 00 these activities participation regulation (grades and comments); (2) by reducing the amount of information to be analysed, helping the educator 00 relevant information recovery and analysis. for participation regulatioo, according to the criteria defined at each learning activity assessmeot planningDoutoradoDoutor em CiĆŖncia da ComputaĆ§Ć£

    Intelligent interface agents for biometric applications

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    This thesis investigates the benefits of applying the intelligent agent paradigm to biometric identity verification systems. Multimodal biometric systems, despite their additional complexity, hold the promise of providing a higher degree of accuracy and robustness. Multimodal biometric systems are examined in this work leading to the design and implementation of a novel distributed multi-modal identity verification system based on an intelligent agent framework. User interface design issues are also important in the domain of biometric systems and present an exceptional opportunity for employing adaptive interface agents. Through the use of such interface agents, system performance may be improved, leading to an increase in recognition rates over a non-adaptive system while producing a more robust and agreeable user experience. The investigation of such adaptive systems has been a focus of the work reported in this thesis. The research presented in this thesis is divided into two main parts. Firstly, the design, development and testing of a novel distributed multi-modal authentication system employing intelligent agents is presented. The second part details design and implementation of an adaptive interface layer based on interface agent technology and demonstrates its integration with a commercial fingerprint recognition system. The performance of these systems is then evaluated using databases of biometric samples gathered during the research. The results obtained from the experimental evaluation of the multi-modal system demonstrated a clear improvement in the accuracy of the system compared to a unimodal biometric approach. The adoption of the intelligent agent architecture at the interface level resulted in a system where false reject rates were reduced when compared to a system that did not employ an intelligent interface. The results obtained from both systems clearly express the benefits of combining an intelligent agent framework with a biometric system to provide a more robust and flexible application
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