Ricardo Azambuja Silveira

Ricardo Azambuja Silveira
Federal University of Santa Catarina | UFSC · Departamento de Informática e Estatística

PhD

About

141
Publications
16,400
Reads
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512
Citations
Citations since 2016
33 Research Items
233 Citations
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
Additional affiliations
February 2006 - present
Federal University of Santa Catarina
Position
  • Professor (Associate)
November 2002 - November 2006
Universidade Federal de Pelotas
Position
  • Professor (Associate)
January 2002 - December 2002
Universidade Federal do Rio Grande do Sul
Position
  • Lecturer

Publications

Publications (141)
Conference Paper
Full-text available
Nowadays, decisions derived from intelligent systems frequently affect human lives (e.g., medicine, robotics, or finance). Traditionally, these systems can be implemented using symbolic or connectionist methods. Since both methods have crucial limitations in different aspects, integrating these methods represents a relevant step to deploying intell...
Conference Paper
Full-text available
AI systems have been playing a crucial role in many different fields of study. Even though connectionist methods, more precisely deep neural networks , are more prevalent nowadays, many of their limitations have delayed the deployment of AI systems in relevant areas, such as healthcare, financial, and legal. One of its main criticisms relies on the...
Chapter
Full-text available
Uma resenha sobre os aspectos envolvendo sistemas tutoriais inteligentes e ambientes inteligentes de aprendizagem
Conference Paper
One of the main challenges of machine learning algorithms is to maximize the result and generalization. Thus, the committee machines, i.e., the combination of more than one learning machine (an approach also called in the literature by ensemble), together with agent theory, become a promising alternative in this challenge. In this sense, this resea...
Thesis
Full-text available
Educational systems supported by computer networks - referred to as Distributed Learning Environments (DLE) - can indeed be an excellent option for overcoming distance teaching obstacles. Chiefly, because instructional resources are centralized, thus allowing for a better handle over the learning process. Secondly, these resources are concurrently...
Thesis
Full-text available
The present work deals with Intelligent Tutoring Systems in Education The area is comprised of a multidisciplinary theoretical framework from Education, Computer Science, and Cognitive Psychology. Computation technics in Artificial Intelligence were implemented in order to develop an Intelligent Tutoring System, also known as ICAI (Intelligent Comp...
Book
This book, which gathers the outcomes of the 9th International Conference on Methodologies and Intelligent Systems for Technology Enhanced Learning and its related workshops, expands on the topics of the evidence-based TEL workshop series in order to provide an open forum for discussing intelligent systems for TEL, their roots in novel learning the...
Article
Full-text available
In this paper, we present a text summarization approach focusing on multi-document, extractive and query-focused summarization that relies on an ontology-based semantic similarity measure, that specifically explores ontology instances. We employ the DBpedia Ontology and a theoretical definition of similarity to determine query-sentence and sentence...
Article
Full-text available
Agents deployed to dynamic environments, such as virtual and augmented reality, need specific mechanisms to capture relevant features from the environment. These mechanisms enable agents to avoid process some useless information and act quickly. The primary goal of this work is to investigate the perception policies of an agent situated in a virtua...
Chapter
Full-text available
Machine committees, as the name implies, are the union of more than one machine of learning in generating a solution to a given problem. During this process, several decisions must be taken to seek the generalization of the model and also to have the coordination to find a final solution at least satisfactory to the problem. At this point, agent th...
Chapter
Some daily tasks can be tedious or consume a great amount of time for humans to finish, such as scheduling a meeting, organize a trip, find a job, buy a house and so on. However, using agents to perform our daily tasks requires social interaction and conflicts resolution. Many negotiating agents have been implemented to manage and solve these confl...
Conference Paper
Full-text available
Mobile devices are now ubiquitous in daily life and the number of activities that can be performed using them is continually growing. This implies increased attention being placed on the device and diverted away from events taking place in the surrounding environment. The impact of using a smartphone on pedestrians in the vicinity of urban traffic...
Article
The usage of agents has become one of the most effective ways to deal with complex systems. The agent’s approach allows for the parallel execution of actions and eases the conception of the system. In this pa- per, we introduce a language, called Sigon, that allows the definition of agents as multi-context systems. Multi-context systems, in turn, a...
Book
This book presents the outcomes of the 8th International Conference in Methodologies and Intelligent Systems for Technology Enhanced Learning held in Toledo (Spain) hosted by the University of Castilla-La Mancha from 20 th to 22nd June 2018. Further expanding the topics of the previous editions, the conference provided an open forum for discussing...
Chapter
Normally, learning environments provide all participants with the same content and the same activities; this includes knowledge sharing, the addition of material to knowledge domains and pedagogical mediation activities for teachers and students. Thus, these processes do not tend to consider the differences that exist between each student, both in...
Chapter
The Semantic Web offers a structure to support generation of significant learning contents for Web based intelligent learning environments by using public knowledge bases known as public ontologies, available on the Web. Prior research has therefore been undertaken into allowing agents societies to navigate through these knowledge bases, in search...
Conference Paper
The Machine Learning is one of the areas of Artificial Intelligence whose objective is the development of computational techniques for knowledge and building systems able to acquire knowledge automatically. One of the main challenges of learning algorithms is to maximize generalization. Thus the board machine, or a combination of more of a learning...
Book
This book presents the outcomes of the 7th International Conference in Methodologies and Intelligent Systems for Technology Enhanced Learning (MIS4TEL'17), hosted by the Polytechnic of Porto, Portugal from 21 to 23 June 2017. Expanding on the topics of the previous conferences, it provided an open forum for discussing intelligent systems for techno...
Conference Paper
Learning management systems are used as a support tool in the process of knowledge sharing. Teachers add the material related to the domain of knowledge and also elaborate pedagogical mediation activities for the students. This process, in general, results in a learning environment that presents the same content for all participants, not taking int...
Conference Paper
Full-text available
In modern globalized, interconnected and networked society, information and knowledge are a differential. Therefore, it is necessary to universalize the right to quality education. The Open Educational Resources (OER) are materials for students, teachers and researchers on the web, controlled by copyright licenses, which support the creation, use,...
Article
Full-text available
Open multiagent systems are those in which the agents can enter or leave the system freely. In these systems any entity with unknown intention can occupy the environment. For this scenario trust and reputation mechanisms should be used to choose partners in order to request services or delegate tasks. Trust and reputation models have been proposed...
Book
Education is the cornerstone of any society and it serves as one of the foundations for many of its social values and characteristics. Knowledge societies offer significant opportunities for novel ICT tools and applications, especially in the fields of education and learning. In such a context, the role of intelligent systems, rooted in artificial...
Conference Paper
Full-text available
This paper presents the implementation and evaluation of ILOMAS, an architectural model designed to select Learning Objects (LO) for e-learning, based on multi-agent systems. The proposed model extends the Intelligent Learning Objects approach through the use of a BDI agent architecture, allowing the communication with the instructional resources t...
Book
This book constitutes the refereed proceedings of the seven workshops co-located with the 14th International Conference on Practical Applications of Agents and Multi-Agent Systems, PAAMS 2016, held in Sevilla, Spain, in June 2016.The 37 full papers presented were carefully reviewed and selected from 77 submissions. The volume presents the papers th...
Conference Paper
This paper presents a model for selecting Learning Objects (LO) for e-learning based on the multi-agent paradigm and aiming to facilitate the use of LOs in an adaptive way in Virtual Learning Environments. The proposed framework extends the Intelligent Learning Objects approach through the use of a BDI agent architecture, allowing the communication...
Chapter
The way as people communicate and interact each other have been changing, especially with the expansion of the internet and the use of social networks. Motivated to a better understanding of this phenomenon in the educational sphere, this research aimed to identify the perception of high school students and tutors about the use of virtual social ne...
Chapter
This paper presents some results of a case study, where we intend to identify the role of tutors in communicative processes, and their contribution to improve the meaningful learning through an accurate analysis of the content posted in discussion forums tools in a Virtual Learning Environment, used for communication and feedback to the students. T...
Book
This book constitutes the refereed proceedings of the seven workshops co-located with the 14th International Conference on Practical Applications of Agents and Multi-Agent Systems, PAAMS 2016, held in Sevilla, Spain, in June 2016.The 37 full papers presented were carefully reviewed and selected from 77 submissions. The volume presents the papers th...
Conference Paper
Full-text available
Este artigo descreve um modelo para seleção de Objetos de Aprendizagem (OA) em cursos a distância, baseado no paradigma de Sistemas Multiagentes, com o intuito de facilitar o uso de OAs de forma adaptativa em ambientes virtuais. O framework proposto estende o conceito de Objetos Inteligentes de Aprendizagem, através da utilização de uma arquitetura...
Conference Paper
This work proposes a new framework for implementing control systems for distributed scheduling. The framework E-HIPS (Extended Hybrid Intelligent Process Scheduler) aims to scale processes in production systems as an extension to the framework HIPS, proposed by the authors in previous work. The original proposal presented a methodology and a set of...
Conference Paper
This paper presents a model to select Learning Objects in e-learning courses, based on multi-agent paradigm, aiming to facilitate the learning material reuse and adaptability on Learning Management Systems. The proposed model has a BDI multi-agent architecture, as an improvement of the Intelligent Learning Objects approach, allowing the dynamic sel...
Conference Paper
This paper presents an e-learning content selection model, based on multi-agent paradigm, aiming to facilitate the learning material reuse and adaptability on Learning Management Systems. The proposed model was developed according to a BDI multi-agent architecture, as an improvement of the Intelligent Learning Objects approach, allowing the dynamic...
Article
Full-text available
The teaching materials production process in distance education requires of its professionals the constant search for tools and resources that contribute to the creation of the content. In this sense, the repositories acts as spaces which store learning objects and teaching materials already produced to be used or adapted according to the course pr...
Article
Full-text available
Este artigo é resultado da monografia submetida à Universidade Federal de Santa Catarina para conclusão do curso de Especialização em Gestão e Docência em Educação a Distância, em que se buscou identificar o papel dos tutores nos processos comunicativos e a forma como as participações destes têm contribuído com o processo de aprendizagem significat...
Article
This paper describes how an intelligent or adaptive learning management systems (LMSs) based on multiagent systems is useful and effective for knowledge sharing engineering or management. A complete model of intelligent learning environment based on intelligent tutoring systems (ITSs) using software agents is described, and a prototype based on thi...
Article
Full-text available
KEYWORD ABSTRACT Learning Objects; Repositories; Search; Recommendation Systems; Multiagent Systems; Ontology This paper discusses some important issues regarding the the management of Learning objects covering searching over repositories and different approaches of recommendation systems and presents a multiagent system based application model for...
Book
Full-text available
Este livro resultou do workshop Ações Institucionais de Avaliação e Disseminação de Tecnologias Educacionais, realizado em 2012 para discutir sobre os trabalhos que participaram do concurso Prêmio Professores do Brasil, realizado pelo MEC, nos anos 2008 a 2011. O evento decorreu de um projeto realizado por professores da Universidade Federal de San...
Conference Paper
Learning Management Systems (LMS) are increasingly being used in Computer-Assisted Education. LMS are used in distance learning and classroom teaching, as teachers and students support tools for learning. Teachers can design and provide material, activities and assessments exercises for the students. Nevertheless, this procedure is usually done in...
Article
Full-text available
Los repositorios de Objetos de Aprendizaje (OA) son importantes para la construcción de contenidos educativos y deben facilitar los procesos de búsqueda, recuperación y organización de OA con el fin de atender objetivos educativos. Sin embargo, estos procesos demandan tiempo y no proveen los resultados esperados; por ello, el objetivo de este artíc...
Article
Full-text available
Learning objects (LOs) repositories are important in building educational content and should allow search, retrieval and composition processes to be successfully developed to reach educational goals. However, such processes require so much time-consuming and not always provide the desired results. Thus, the aim of this paper is to propose a model f...
Conference Paper
Full-text available
Trust and reputation have been proposed in the Multiagent Systems area as a way to assist agents to select good partners in order to improve interactions between them. As well as trust, agent emotions have been studied with the aim of making the actions and reactions of the agents more like those of humans. In this paper, we present a trust model b...
Conference Paper
Full-text available
Trust and reputation have been proposed in the Multiagent Systems area as a way to assist agents to select good partners in order to improve interactions between them. As well as trust, agent emotions have been studied with the aim of making the actions and reactions of the agents more like those of humans. In this paper, we present a trust model b...
Article
Full-text available
O artigo apresenta um estudo de caso enfocando a análise da gestão do Projeto Aluno Integrado (PAI), promovido pelo Ministério da Educação e Cultura (MEC), no período de 2010 e 2011, na modalidade de EaD, com o objetivo de fomentar o uso pedagógico das Tecnologias de Informação e Comunicação (TICs) nas redes públicas de educação básica do Brasil. U...
Article
O artigo apresenta um estudo de caso sobre o modo como ocorreu a gestão do conhecimento na parte coordenada pela Universidade Federal de Santa Catarina (UFSC), abrangendo alunos dos estados do Paraná, Santa Catarina, Rio Grande do Sul e Mato Grosso do Sul, do Projeto Aluno Integrado (PAI), promovido pelo Ministério da Educação e Cultura (MEC), no p...
Conference Paper
This paper proposes a multiagent system application model for indexing, retrieving and recommending learning objects stored in different and heterogeneous repositories. The objects within these repositories are described by filled fields using different metadata (data about data) standards. The searching mechanism covers several different learning...
Conference Paper
The computer-assisted education is increasingly exploited, as well as the use of Learning Management Systems (LMS). LMS are used in distance learning and classroom teaching as teachers and students support tools in the teaching–learning process. Teachers can provide material, do activities and create assessments for students. Nevertheless, this pro...
Article
Virtual learning environments (VLEs) are used in distance learning and classroom teaching as teachers and students support tools in the teachingtextendashlearning process, where teachers can provide material, activities and assessments for students. However, this process is done in the same way for all the students, regardless of their differences...
Conference Paper
Virtual learning environments (VLEs) are used in distance learning and classroom teaching as teachers and students support tools in the teaching- learning process, where teachers can provide material, activities and assessments for students. However, this process is done in the same way for all the students, regardless of their differences in perfo...
Conference Paper
The evolution of the information and communication Technologies and the considerable growth of on-line education have increased the use of different media and resources in the structuring of the model of a course. The adequate choice for the structure of courses is fundamental to the motivation and comprehension of the context by the students. The...
Article
This paper proposes a multiagent system application model for indexing, retrieving and recommendation learning objects stored in different and heterogeneous repositories. The objects within these repositories are described by filled fields using different metadata standards. The searching mechanism covers several different learning object repositor...
Article
Full-text available
A evolução das tecnologias de informação e comunicação e o crescimento substancial da educação a distância aumentaram a utilização de diferentes mídias e recursos utilizados na estruturação de um modelo de curso. A escolha adequada da estrutura dos cursos é fundamental para a motivação e compreensão do conteúdo pelos estudantes. O presente artigo a...
Article
Full-text available
Esta pesquisa, resultado da tese de doutorado em Informatica na educacao da UFRGS, visa identificar como podemos inferir computacionalmente, a partir da analise de uma conversacao online com um sujeito com autismo, os deficits de comunicacao presentes nessa conversacao de tal forma que possa ser oferecido algum tipo de compensacao utilizando agente...
Conference Paper
This paper proposes a multiagent system application model for indexing and retrieving learning objects stored in different and heterogeneous repositories. The objects within these repositories are described by filled fields using different metadata standards. The searching mechanism covers several different learning object repositories and the same...
Book
Full-text available
Este livro traz um conjunto de artigos que discute e relata experiencias relacionadas às políticas públicas de disseminação de tecnologias educacionais para melhoria da qualidade da Educação Básica no Brasil. http://www.senado.gov.br/senado/biblioteca/servicos/getSumario.asp?cod=6249&tipo=A
Conference Paper
The Artificial Intelligence in Web applications is increasingly present, however, the use of multiagent systems does not increase in the same proportion. One of the causes of this problem is the difficulty found in creating such systems with the current developing platforms. The objective of this work is to create a new tool to assist in implementi...
Conference Paper
This paper proposes a multiagent system application model for indexing and retrieving learning objects stored in different and heterogeneous repositories. The objects within these repositories are described by filled fields using different metadata standards. The searching mechanism covers several different learning object repositories and the same...
Article
Full-text available
O Projeto Aluno Integrado no ano de 2010 conta com a participação de setenta mil estudantes de escola públicas em todo Brasil. Esta pesquisa objetiva analisar a desistência dos estudantes dos Estados gerenciados pela UFSC. Quanto aos procedimentos metodológicos classifica-se como descritiva, predominantemente qualitativa, estudo de caso e documenta...
Article
A proposta deste trabalho contempla uma comunidade de agentes BDI aplicando lógica fuzzy no intuito de classificar estudantes em grupos pré-determinados. O objetivo dessa classificação é conduzir o estudante para uma utilização mais apropriada do ambiente de ensino-aprendizagem. Neste intuito utilizou-se a lógica fuzzy, pois ela permite modelar cre...
Conference Paper
This paper describes a method to reduce the uncertainty about investments in stock market. The objective is to predict the movements of the Bovespa Stock Index through multiagent system. The proposed system has a population of agents for each asset that is a constituent part of the stock index. Agents have learning skills due to the use of neural n...
Article
Full-text available
The Learning Objects are a great initiative to increase the reusability of educational material. Despite this, the e-learning systems are not prepared to attend the individual learner's characteristics or provide custom learning experiences. This paper proposes the design of a multi-agent system based on Belief-Desire Intention (BDI) paradigm to cr...
Conference Paper
Full-text available
This research proposes the use of a belief desire intention (BDI) agent architecture that can be integrated with virtual learning environments (VLE). Thus we are developing and implementing a methodology that considers the main agents in this architecture. The BDI architecture applied in this study was based on Jadex. In addition this platform is s...