Maite Oronoz

Also published as: M. Oronoz


2019

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IxaMed at PharmacoNER Challenge 2019
Xabier Lahuerta | Iakes Goenaga | Koldo Gojenola | Aitziber Atutxa Salazar | Maite Oronoz
Proceedings of The 5th Workshop on BioNLP Open Shared Tasks

The aim of this paper is to present our approach (IxaMed) in the PharmacoNER 2019 task. The task consists of identifying chemical, drug, and gene/protein mentions from clinical case studies written in Spanish. The evaluation of the task is divided in two scenarios: one corresponding to the detection of named entities and one corresponding to the indexation of named entities that have been previously identified. In order to identify named entities we have made use of a Bi-LSTM with a CRF on top in combination with different types of word embeddings. We have achieved our best result (86.81 F-Score) combining pretrained word embeddings of Wikipedia and Electronic Health Records (50M words) with contextual string embeddings of Wikipedia and Electronic Health Records. On the other hand, for the indexation of the named entities we have used the Levenshtein distance obtaining a 85.34 F-Score as our best result.

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Leveraging SNOMED CT terms and relations for machine translation of clinical texts from Basque to Spanish
Xabier Soto | Olatz Perez-De-Viñaspre | Maite Oronoz | Gorka Labaka
Proceedings of the Second Workshop on Multilingualism at the Intersection of Knowledge Bases and Machine Translation

2016

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The impact of simple feature engineering in multilingual medical NER
Rebecka Weegar | Arantza Casillas | Arantza Diaz de Ilarraza | Maite Oronoz | Alicia Pérez | Koldo Gojenola
Proceedings of the Clinical Natural Language Processing Workshop (ClinicalNLP)

The goal of this paper is to examine the impact of simple feature engineering mechanisms before applying more sophisticated techniques to the task of medical NER. Sometimes papers using scientifically sound techniques present raw baselines that could be improved adding simple and cheap features. This work focuses on entity recognition for the clinical domain for three languages: English, Swedish and Spanish. The task is tackled using simple features, starting from the window size, capitalization, prefixes, and moving to POS and semantic tags. This work demonstrates that a simple initial step of feature engineering can improve the baseline results significantly. Hence, the contributions of this paper are: first, a short list of guidelines well supported with experimental results on three languages and, second, a detailed description of the relevance of these features for medical NER.

2014

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IxaMed: Applying Freeling and a Perceptron Sequential Tagger at the Shared Task on Analyzing Clinical Texts
Koldo Gojenola | Maite Oronoz | Alicia Pérez | Arantza Casillas
Proceedings of the 8th International Workshop on Semantic Evaluation (SemEval 2014)

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Translating SNOMED CT Terminology into a Minor Language
Olatz Perez-de-Viñaspre | Maite Oronoz
Proceedings of the 5th International Workshop on Health Text Mining and Information Analysis (Louhi)

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Adverse Drug Event prediction combining shallow analysis and machine learning
Sara Santiso | Arantza Casillas | Alicia Pérez | Maite Oronoz | Koldo Gojenola
Proceedings of the 5th International Workshop on Health Text Mining and Information Analysis (Louhi)

2013

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A Finite-State Approach to Translate SNOMED CT Terms into Basque Using Medical Prefixes and Suffixes
Olatz Perez-de-Viñaspre | Maite Oronoz | Manex Agirrezabal | Mikel Lersundi
Proceedings of the 11th International Conference on Finite State Methods and Natural Language Processing

2012

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First Approaches on Spanish Medical Record Classification Using Diagnostic Term to Class Transduction
A. Casillas | A. Díaz de Ilarraza | K. Gojenola | M. Oronoz | Alicia Pérez
Proceedings of the 10th International Workshop on Finite State Methods and Natural Language Processing

2011

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Using Kybots for Extracting Events in Biomedical Texts
Arantza Casillas | Arantza Díaz de Ilarraza | Koldo Gojenola | Maite Oronoz | German Rigau
Proceedings of BioNLP Shared Task 2011 Workshop

2009

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Evaluating the Impact of Morphosyntactic Ambiguity in Grammatical Error Detection
Arantza Díaz de Ilarraza | Koldo Gojenola | Maite Oronoz
Proceedings of the International Conference RANLP-2009

2008

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Detecting Erroneous Uses of Complex Postpositions in an Agglutinative Language
Arantza Díaz de Ilarraza | Koldo Gojenola | Maite Oronoz
Coling 2008: Companion volume: Posters

2004

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Abar-Hitz: An Annotation Tool for the Basque Dependency Treebank
Arantza Díaz de Ilarraza | Aitzpea Garmendia | Maite Oronoz
Proceedings of the Fourth International Conference on Language Resources and Evaluation (LREC’04)

2000

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Corpus-Based Syntactic Error Detection Using Syntactic Patterns
Koldo Gojenola | Maite Oronoz
Proceedings of the ANLP-NAACL 2000 Student Research Workshop

1997

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From Psycholinguistic Modelling of Interlanguage in Second Language Acquisition to a Computational Model
Montse Maritxalar | Arantza Diaz de Ilarraza | Maite Oronoz
CoNLL97: Computational Natural Language Learning