The Question-Answering (QA) systems fall in the study area of Information Retrieval (IR) and Natural Language Processing (NLP). Given a set of documents, a QA system tries to obtain the correct answer to the questions posed in Natural Language (NL). Normally, the QA systems comprise three main components: question classification, information retrieval and answer extraction. Question classification plays a major...
One of the most important contributions that any decision support system can make to achieve wide acceptance among any community is to be able to justify its own suggestions. When dealing with highly technical and scientifically advanced practitioners like medical doctors or any other related clinical workers, the ability to justify itself using the domain specialist usual terminology and technicalities i...
Neste artigo apresenta-se um sistema de part-of-speech tagging, independente do domínio, para etiquetação gramatical de texto para o Português e Inglês. O etiquetador usa informação morfo-sintáctica que vem de um dicionário local que completa a sua informação recorrendo a dicionários disponíveis na rede como o da Priberam e do LookWayUP. Este etiquetador é baseado numa função heurística que é usada na optimizaç...
Em Portugal, e de acordo com o último relatório do Programa Nacional de luta contra a Tuberculose da Direção-Geral da Saúde, em 2012 foram notificados 2480 casos de tuberculose (TB), dos quais 2286 correspondem a casos novos (taxa de incidência de 21,6/100.000 habitantes). Embora Portugal continue entre os países de incidência intermédia, o único na Europa Ocidental, a incidência dos casos novos parece vir a di...
Tese de doutoramento, Antropologia (Antropologia da Religião e do Simbólico), Universidade de Lisboa, Instituto de Ciências Sociais, 2013 ; In the end of the 1970s Chinese people, mostly from the region of Wenzhou (Zhejiang province, Southeast China) recovered previous migratory chains to Europe that dated back to the late nineteenth century. These new migratory flows started at a time when China was precisely...
We present the work done as a contribution to use an enriched ontology as the support for Semantic Interoperability among technicians and systems in healthcare providing environments. Clinical practice ontologies are the next generation workhorse for automatic reasoning using Semantic Web techniques and tools in the healthcare sub-domain. Acquisition from semi-structured data that renders a full picture of the ...
In this paper we propose a Cooperative Question Answering System that takes as input natural language queries and is able to return a cooperative answer based on semantic web resources, more specifically DBpedia represented in OWL/RDF as knowledge base and WordNet to build similar questions. Our system resorts to ontologies not only for reasoning but also to find answers and is independent of prior knowledge of...
Os sistemas de pergunta-resposta em língua natural sobre a web semântica exigem mecanismos capazes de interpretar para além da correspondência de palavras em documentos, actualmente feito pelos motores de pesquisa na internet, bem como de encontrar uma resposta precisa, sem exigir a ajuda do utilizador para interpretar os documentos retornados. Neste artigo apresentamos um Controlador do Discurso que, através d...
In this paper we propose a Cooperative Question Answering System that takes as input natural language queries and is able to return a cooperative answer based on semantic web resources, more specifically DBpedia represented in OWL/RDF as knowledge base and WordNet to build similar questions. Our system resorts to ontologies not only for reasoning but also to find answers and is independent of prior knowledge of...
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