Ari Pirkola


1996

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The Effect of Anaphor and Ellipsis Resolution on Proximity Searching in a Text Database
Ari Pirkola | Kalervo Järvelin
1996 Volume 32 Issue 2

1998

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The Effects of Query Structure and Dictionary Setups in Dictionary-Based Cross-Language Information Retrieval
Ari Pirkola
SIGIR '98: Proceedings of the 21st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, August 24-28 1998, Melbourne, Australia

1999

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The Effects of Conjunction, Facet Structure, and Dictionary Combinations in Concept-Based Cross-Language Retrieval
Ari Pirkola | Heikki Keskustalo | Kalervo Järvelin
1999 Volume 1 Issue 3

2000

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Bilingual Tests with Swedish, Finnish and German Queries
Turid Hedlund | Heikki Keskustalo | Ari Pirkola | Mikko Sepponen | Kalervo Järvelin
Working Notes for CLEF 2000 Workshop co-located with the 4th European Conference on Digital Libraries (ECDL 2000), Lisbon, Portugal, September 21-22, 2000

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Bilingual Tests with Swedish, Finnish, and German Queries: Dealing with Morphology, Compound Words, and Query Structure
Turid Hedlund | Heikki Keskustalo | Ari Pirkola | Mikko Sepponen | Kalervo Järvelin
Cross-Language Information Retrieval and Evaluation, Workshop of Cross-Language Evaluation Forum, CLEF 2000, Lisbon, Portugal, September 21-22, 2000, Revised Papers

2001

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Utaclir @ CLEF 2001 - Effects of Compound Splitting and N-Gram Techniques
Turid Hedlund | Heikki Keskustalo | Ari Pirkola | Eija Airio | Kalervo Järvelin
Evaluation of Cross-Language Information Retrieval Systems, Second Workshop of the Cross-Language Evaluation Forum, CLEF 2001, Darmstadt, Germany, September 3-4, 2001, Revised Papers

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UTACLIR @ CLEF 2001: New Features for Handling Compound Words and Untranslatable Proper Names
Turid Hedlund | Heikki Keskustalo | Ari Pirkola | Eija Airio | Kalervo Järvelin
Working Notes for CLEF 2001 Workshop co-located with the 5th European Conference on Digital Libraries (ECDL 2001), Darmstadt, Germany, September 3-4, 2001

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Employing the resolution power of search keys
Ari Pirkola | Kalervo Järvelin
2001 Volume 52 Issue 7

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Dictionary-Based Cross-Language Information Retrieval: Problems, Methods, and Research Findings
Ari Pirkola | Turid Hedlund | Heikki Keskustalo | Kalervo Järvelin
2001 Volume 4 Issue 3-4

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Aspects of Swedish morphology and semantics from the perspective of mono- and cross-language information retrieval
Turid Hedlund | Ari Pirkola | Kalervo Järvelin
2001 Volume 37 Issue 1

2002

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UTACLIR @ CLEF 2002: Towards a Unified Translation Process Model
Eija Airio | Heikki Keskustalo | Turid Hedlund | Ari Pirkola
Working Notes for CLEF 2002 Workshop co-located with the 6th European Conference on Digital Libraries (ECDL 2002), Rome, Italy, September 19-20, 2002

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Bilingual and Multilingual Runs with a Unified Process
Eija Airio | Heikki Keskustalo | Turid Hedlund | Ari Pirkola
Advances in Cross-Language Information Retrieval, Third Workshop of the Cross-Language Evaluation Forum, CLEF 2002. Rome, Italy, September 19-20, 2002. Revised Papers

2003

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TREC 2003 Genomics Track Experiments at UTA: Query Expansion with Predefinded High Frequency Terms
Ari Pirkola | Erkka Leppänen
Proceedings of The Twelfth Text REtrieval Conference, TREC 2003, Gaithersburg, Maryland, USA, November 18-21, 2003

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Non-adjacent Digrams Improve Matching of Cross-Lingual Spelling Variants
Heikki Keskustalo | Ari Pirkola | Kari Visala | Erkka Leppänen | Kalervo Järvelin
String Processing and Information Retrieval, 10th International Symposium, SPIRE 2003, Manaus, Brazil, October 8-10, 2003, Proceedings

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Fuzzy translation of cross-lingual spelling variants
Ari Pirkola | Jarmo Toivonen | Heikki Keskustalo | Kari Visala | Kalervo Järvelin
SIGIR 2003: Proceedings of the 26th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, July 28 - August 1, 2003, Toronto, Canada

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Multilingual Experiments of UTA at CLEF 2003: The Impact of Different Merging Strategies and Word Normalizing Tools
Eija Airio | Heikki Keskustalo | Turid Hedlund | Ari Pirkola
Working Notes for CLEF 2003 Workshop co-located with the 7th European Conference on Digital Libraries (ECDL 2003), Trondheim, Norway, August 21-22, 2003

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The Impact of Word Normalization Methods and Merging Strategies on Multilingual IR
Eija Airio | Heikki Keskustalo | Turid Hedlund | Ari Pirkola
Comparative Evaluation of Multilingual Information Access Systems, 4th Workshop of the Cross-Language Evaluation Forum, CLEF 2003, Trondheim, Norway, August 21-22, 2003, Revised Selected Papers

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Applying query structuring in cross-language retrieval
Ari Pirkola | Deniz Puolamäki | Kalervo Järvelin
2003 Volume 39 Issue 3

2004

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TREC 2004 Genomics Track Experiments at UTA: The Effects of Primary Keys, Bigram Phrases and Query Expansion on Retrieval Performance
Ari Pirkola
Proceedings of the Thirteenth Text REtrieval Conference, TREC 2004, Gaithersburg, Maryland, USA, November 16-19, 2004

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Dictionary-Based Cross-Language Information Retrieval: Learning Experiences from CLEF 2000-2002
Turid Hedlund | Eija Airio | Heikki Keskustalo | Raija Lehtokangas | Ari Pirkola | Kalervo Järvelin
2004 Volume 7 Issue 1-2

2005

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TREC 2005 Genomics Track Experiments at UTA
Ari Pirkola
Proceedings of the Fourteenth Text REtrieval Conference, TREC 2005, Gaithersburg, Maryland, USA, November 15-18, 2005

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Translating cross-lingual spelling variants using transformation rules
Jarmo Toivonen | Ari Pirkola | Heikki Keskustalo | Kari Visala | Kalervo Järvelin
2005 Volume 41 Issue 4

2006

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The Effects of Relevance Feedback Quality and Quantity in Interactive Relevance Feedback: A Simulation Based on User Modeling
Heikki Keskustalo | Kalervo Järvelin | Ari Pirkola
Advances in Information Retrieval, 28th European Conference on IR Research, ECIR 2006, London, UK, April 10-12, 2006, Proceedings

2007

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Frequency-based identification of correct translation equivalents (FITE) obtained through transformation rules
Ari Pirkola | Jarmo Toivonen | Heikki Keskustalo | Kalervo Järvelin
2007 Volume 26 Issue 1

2008

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Intuition-supporting visualization of user's performance based on explicit negative higher-order relevance
Heikki Keskustalo | Kalervo Järvelin | Ari Pirkola | Jaana Kekäläinen
Proceedings of the 31st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2008, Singapore, July 20-24, 2008

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A Novel Implementation of the FITE-TRT Translation Method
Aki Loponen | Ari Pirkola | Kalervo Järvelin | Heikki Keskustalo
Advances in Information Retrieval , 30th European Conference on IR Research, ECIR 2008, Glasgow, UK, March 30-April 3, 2008. Proceedings

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Evaluating the effectiveness of relevance feedback based on a user simulation model: effects of a user scenario on cumulated gain value
Heikki Keskustalo | Kalervo Järvelin | Ari Pirkola
2008 Volume 11 Issue 3

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Focused web crawling in the acquisition of comparable corpora
Tuomas Talvensaari | Ari Pirkola | Kalervo Järvelin | Martti Juhola | Jorma Laurikkala
2008 Volume 11 Issue 5

2009

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Test Collection-Based IR Evaluation Needs Extension toward Sessions - A Case of Extremely Short Queries
Heikki Keskustalo | Kalervo Järvelin | Ari Pirkola | Tarun Sharma | Marianne Lykke
Information Retrieval Technology, 5th Asia Information Retrieval Symposium, AIRS 2009, Sapporo, Japan, October 21-23, 2009. Proceedings

2012

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Cumulated Relative Position: A Metric for Ranking Evaluation
Marco Angelini | Nicola Ferro | Kalervo Järvelin | Heikki Keskustalo | Ari Pirkola | Giuseppe Santucci | Gianmaria Silvello
Information Access Evaluation. Multilinguality, Multimodality, and Visual Analytics - Third International Conference of the CLEF Initiative, CLEF 2012, Rome, Italy, September 17-20, 2012. Proceedings

2013

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Cumulated Relative Position: A Metric for Ranking Evaluation
Marco Angelini | Nicola Ferro | Kalervo Järvelin | Heikki Keskustalo | Ari Pirkola | Giuseppe Santucci | Gianmaria Silvello
Proceedings of the 4th Italian Information Retrieval Workshop, Pisa, Italy, January 16-17, 2013

2016

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The twist measure for IR evaluation: Taking user's effort into account
Nicola Ferro | Gianmaria Silvello | Heikki Keskustalo | Ari Pirkola | Kalervo Järvelin
2016 Volume 67 Issue 3