Manuel Alberto Pérez-Coutiño

Although the application of data fusion in information retrieval has yielded good results in the majority of the cases, it has been noticed that its achievement is dependent on the quality of the input result lists. In order to tackle this problem, in this paper we explore the combination of only the n-top result lists as an alternative to the fusi...

This paper describes the experiments performed for the QA@CLEF-2006 within the joint participation of the eLing Division at VEng and the Language Technologies Laboratory at INAOE. The aim of these experiments was to observe and quantify the improvements in the final step of the Question Answering prototype when some syntactic features were included...

This paper describes the experiments performed for the QA@CLEF-2006 within the joint participation of the eLing Division at VEng and the Language Technologies Laboratory at INAOE. This year our laboratories have participated in the Spanish monolingual task, continue with their previous work described in (Pérez-Coutiño et al., 2005). The aim of thes...

This paper describes the prototype developed in the Language Technologies Laboratory at INAOE for the Spanish monolingual QA evaluation task at CLEF 2005. The proposed approach copes with the QA task according to the type of question to solve (factoid or definition). In order to identify possible answers to factoid questions, the system applies a m...

This work is a revised version of the paper “INAOE-UPV Joint Participation at CLEF 2005: Experiments in Monolingual Question Answering”, previously published in the CLEF 2005 working notes (www.clef-campaign.org/2005/working_notes/). This paper describes a full data-driven system for question answering. The system uses pattern matching and statisti...

This paper describes the prototype developed by the Language Technologies Laboratory at INAOE for Spanish monolingual QA evaluation task at CLEF 2004. Our approach is centered on the use of context at a lexical level in order to identify possible answers to factoid questions. This method is supported by an alternative one based on pattern recogniti...

We present in this work a method for question classification in Spanish and Portuguese. The method relies on lexical features and at- tributes extracted from the Web. A machine learning algorithm, namely Support Vector Machines is successfully trained on these features. Our experimental results show that this method performs consistently well over...

This paper discuses preliminary results on acoustic models creation through acoustic models already in existence for another language. In this work we show as case of study, the creation of acoustic models for Mexican Spanish, tagging automatically the training corpus with a recognition system for French. The resulting set of acoustic models for Me...

Recent works on question answering are based on complex natural language processing tech-niques: named entity extractors, parsers, chunkers, etc. While these approaches have proven to be effective they have the disadvantage of being targeted to a particular language. In this paper we present a full data-driven method that uses simple lexical patter...

This paper describes the prototype developed by the Language Technologies Laboratory at INAOE for Spanish monolingual QA evaluation task at CLEF 2005. Our approach is centered in the use of lexical features in order to identify possible answers to factual questions. Such method is supported by an alternative one based on pattern recognition in orde...

Question Answering has become a promising research field whose aim is to provide more natural access to the information than traditional document retrieval techniques. In this work, an approach centered in the use of context at a lexical level has been followed in order to identify possible answers to short factoid questions stated by the user in n...

The problem of acquiring valuable information from the large amounts available today in electronic media requires automated mechanisms more natural and efficient than those already existing. The trend in the evolution of information retrieval systems goes toward systems capable of answering specific questions formulated by the user in her/his langu...

Nowadays there is a large amount of digital texts available for every purpose. New flexible and robust approaches are necessary for their access and analysis. This paper proposes a text exploration scheme based on hypertext, which incorporates some elements from information retrieval and text mining in order to transform the blind navigation of the...

Current efforts on the semantic web are mainly focused on the creation of recommendations and standards for adding semantic descriptions to web resources. This situation represents a huge challenge to content creators that have to construct manually such descriptions, implying high costs in material and human resources. This paper presents a multi-...

The language model is an important component of any speech recogni- tion system. In this paper, we present a lexical enrichment methodology of corpora focused o n the construction of statistical language models. This methodology co n- siders, on one hand, the identification of the set of poor represented words of a given training corpus, and on the...

En este artículo se presenta un estudio para evaluar la riqueza léxica de un corpus específicamente recolectado para el entrenamiento de modelos de lenguaje estadísticos. Para ello se presenta un estudio comparativo entre un corpus oral –el corpus DIME– y un corpus recolectado de la Web para la construcción de modelos de lenguaje –el corpus WebDIME...

This paper describes the prototype developed by the Language Technologies Laboratory at INAOE for Spanish monolingual QA evaluation task at CLEF 2004. Our approach is centered in the use of context at a lexical level in order to identify possible answers to factoid questions. Such method is supported by an alternative one based on pattern recogniti...

PhD Thesis in Computer Science written by Manuel Alberto Pérez Coutiño under the supervision of Dr. Manuel Montes-y-Gómez and Dr. Aurelio López López (both from INAOE). The author was examined in March 2006 in Sta. Ma. Tonantzintla, Pue, México by the committee integrated by Drs. Angélica Muñoz Meléndez, Saúl E. Pomares Hernández, Carlos A. Reyes G...