Mestrado em Ciência da Computação (INF)

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http://200.137.215.59/tede/handle/tde/225

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Agora exibindo 1 - 7 de 7

Ambiente colaborativo de ensino/aprendizagem para o ensino fundamental baseado nos princípios da web semântica
(Universidade Federal de Goiás, 2014-05-02) Costa, Adriano Ferraz da; Ferreira, Deller James; Carvalho, Cedric Luiz de; http://lattes.cnpq.br/4090131106212286; Carvalho, Cedric Luiz de; Ferreira, Deller James; Carvalho, Sérgio Teixeira de; Marques, Fátima de Lourdes dos Santos Nunes
The Semantic Web or Web 3.0 is a model proposed by Tim Berners-Lee concept. The Semantic Web is an extension of current a web that will enable computers and humans to work in cooperation. However, in order to Web 3.0 becomes a web reality it requires to implement applications that provide their data structured according to the Semantic Web standards. In this dissertation we developed a Collaborative Learning Environment that takes advantage of the Semantic Web, and it favors the process of teaching and learning. The Collaborative Environment is based on collaboration scripts and it is integrated into a framework for the creation of Virtual Communities of Practice that are semantically structured.
Mapeamento de bancos de dados para domínios semânticos
(Universidade Federal de Goiás, 2015-06-15) Cruz, Jaderson Araújo Gonçalves da; Carvalho, Cedric Luiz de; http://lattes.cnpq.br/4090131106212286; Carvalho, Cedric Luiz de; Leitão Júnior, Plínio de Sá; Lóscio, Bernadette Farias
This paper proposes a database mapping to a semantic domain. This process consists of mapping a set of database, relational or NoSQL, for a pre-existing user-defined ontology. Subsequently the elements of these databases are linked to semantic repositories in order to produce a representation as linked open data.
SABENÇA - um arcabouço computacional baseado na aprendizagem de ontologias a partir de textos
(Universidade Federal de Goiás, 2015-04-22) Guimaraes, Norton Coelho; Carvalho, Cedric Luiz de; http://lattes.cnpq.br/4090131106212286; Carvalho , Cedric Luiz de; Rosa, Thierson Couto; Freitas, Frederico Luiz Gonçalves de
The research on ontology learning has been carried out in various areas of knowledge. Semi-automatic or automatic extraction of ontologies would assist in the acceleration of knowledge structuring of multiple domains. Semi-automatic approaches to ontology learning from texts are proposed in several scientific papers, mostly with the support of natural language processing techniques. This paper describes the construction of a computational framework for semi-automated ontology learning from texts in the Portuguese language. Axioms are not dealt with in this paper. The work done here originated from the proposal of Philipp Cimiano [18], along with mechanisms for standardization of texts, Natural Language Processing, identification of taxonomic relationships and structure of ontologies. This research resulted in the development of a set of classes concrete and a set of abstract classes that comprise a computational framework. In this work we also present a case study in the field public safety, proving the benefits of computational framework.
Fluzz - redes sociais: geração, visualização e buscas que maximizam a probabilidade de influência entre indivíduos
(Universidade Federal de Goiás, 2013-02-25) Marin, Ericsson Santana; Carvalho, Cedric Luiz de; http://lattes.cnpq.br/4090131106212286; Carvalho, Cedric Luiz de; Rosa, Thierson Couto; Julia, Rita Maria da Silva
O propósito desta dissertação é a realização de um estudo sobre redes, mais especificamente das redes sociais, visando à criação de modelos, técnicas e ferramentas para simular a sua geração, produzir o seu mapeamento estrutural gráfico, e viabilizar a realização de buscas nos ambientes que as representam. A geração e visualização de redes, ou grafos, assim como a realização de buscas, compõem um ramo continuamente estudado por diversos profissionais que ingressaram recentemente em uma nova ciência interdisciplinar, enraizada em pesquisas sociológicas e na Teoria dos Grafos: a Ciência das Redes. Alguns resultados provenientes das pesquisas desta ciência subverteram conceitos previamente definidos, e apresentaram características reveladoras sobre o universo social interconectado. Dentre eles destacam-se a desmistificação dos seis graus de separação com a comprovação do fenômeno do "mundo pequeno". Tais revelações inserem-se particularmente no estudo das redes sociais, mas demonstraram ser uma característica onipresente nas demais redes pesquisadas pelos cientistas. Consequentemente, as pesquisas sobre redes sociais principiaram o estudo sobre redes de forma mais geral, produzindo inúmeros trabalhos sobre o tema. Dentro deste contexto, a aplicação Fluzz, engendrada sob os alicerces dos Sistemas Multiagentes e dos princípios da contemporânea Ciência das Redes, é introduzida para prover ferramentas de visualização e de simulação da geração de redes sociais, baseadas nos modelos já propostos na literatura e em um novo modelo concebido nesta obra. Para o processo de busca, agentes de software capazes de atuar de forma distribuída e paralela, foram implementados utilizando-se de diversas abordagens intrínsecas à Inteligência Artificial, como Algoritmo de Dijkstra, Otimização por Colônia de Formigas e Algoritmos Genéticos. Tais agentes foram projetados para maximizar a probabilidade de influência entre os indivíduos das redes sociais, contribuindo para o aumento da atividade de conexão, de interação, e consequentemente de cooperação entre os mesmos.
Sistema de localização de facilidades: uma abordagem para mensuração de pontos de demanda e localização de facilidades
(Universidade Federal de Goiás, 2012-10-08) Oliveira, Max Gontijo de; Soares, Telma Woerle de Lima; http://lattes.cnpq.br/6296363436468330; Carvalho, Cedric Luiz de; http://lattes.cnpq.br/4090131106212286; Carvalho, Cedric Luiz de; Soares, Telma Woerle de Lima; Rodrigues, Cássio Leonardo; Alves, Antônio César Baleeiro
Several organizations need to solve the problem of locate and allocate facilities within a geographic area. There are location/allocation problems in various situations, like the distribution of police cars, ambulances, taxi drivers, bus stops among other numerous situations where the location of such facilities is strategic for organization. In location/allocation problems, usually is necessary allocate each demand point to the closest facility. So, each facility will be located in the center of demand points, considering the demand as weight. However, the majority of the real location problems have capacity constraint. Therefore, each facility has a certain capacity based on the type of demand. Facility location problems can be continuous or discrete. In continuous problems (also called Weber problem with multiple sources), any point in the plane is a potential site for the instalation of the facility. There are several approaches for working with continuous models. Furthermore, there are many others works approaches presenting models with capacity constraint. But most of these approaches turns the continous model to a discrete model. The objective of this work thesis is to present an approach to distribution of facilities in instances of the capacitated facility location problem. A case study will be presented with the purpose of evaluating the results.
Extração e mineração de informação independente de domínios da web na língua portuguesa
(Universidade Federal de Goiás, 2015-05-08) Pires, Julio Cesar Batista; Carvalho, Cedric Luiz de; http://lattes.cnpq.br/4090131106212286; Carvalho, Cedric Luiz de; Ambrósio, Ana Paula Laboissière; Vieira, Renata
Many people are constantly connected on the Web. They are looking for all kinds of things. The Web is a huge source of information. So, they can find almost everything they want. However, Web information is disorganized and have no formal structure. This hampers machine processing and consequently makes information access more difficult. Bringing structure to the Web can be one of the key points for facilitating user searching and navigation. A recent technique, Open Information Extraction, has been successfully applied to extract structured information from the Web. This technique has been mostly applied in pages written in English. This work is specifically focused on information extraction for Portuguese. Techniques used here can be also used to other languages too.
Cognare: um sistema para alocação dinâmica de recursos baseado em técnicas de Inteligência Artificial
(Universidade Federal de Goiás, 2012-06-21) Xavier, Francisco Calaça; Carvalho, Cedric Luiz de; http://lattes.cnpq.br/4090131106212286; Carvalho, Cedric Luiz de; Yamanaka, Keiji; Camilo Júnior, Celso Gonçalves
The problem of decision making about the allocation of resources is present in many areas of society. The allocation of ambulances to the occurrence of accidents with victims and the allocation of teams to solve problems in the supply of electricity are examples of situations where it is necessary to make this decision. We can also mention the problems that occur in the allocation of hardware resources when a system is running in a distributed form. In this context, this paper presents the system COGNARE, which brings together techniques such as Genetic Algorithms, Fuzzy Logic and Multiagent Systems in order to allocate tasks to resources dynamically. The COGNARE was used in two different situations. At first, the problem was to allocate vehicles to a distributor of electricity to occurrences of failures in supply. In the second situation, the problem was to allocate hardware resources in a distributed system. In both cases, the COGNARE presented as a system of allocating resources efficiently. Keywords

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