Laboratory of Computer and Information Science / Neural Networks Research Centre

Publications by Krista Lagus

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2013

80Jussa Klapuri, Ilari T. Nieminen, Tapani Raiko, and Krista Lagus. Variational bayesian pca versus k-nn on a very sparse reddit voting dataset. In Allan Tucker, Frank Höppner, Arno Siebes, and Stephen Swift, editors, Advances in Intelligent Data Analysis XII, volume 8207 of Lecture Notes in Computer Science, pages 249–260. Springer Berlin / Heidelberg, October 2013.
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79Krista Lagus, Juho Saari, Ilari T. Nieminen, and Timo Honkela. Exploration of loneliness questionnaires using the self-organising map. In Valeri Mladenov, Petia D. Koprinkova-Hristova, Günther Palm, Alessandro E. P. Villa, Bruno Apollini, and Nikola Kasabov, editors, Proceedings of ICANN 2013 - 23rd International Conference on Artificial Neural Networks, pages 405–411, 2013.
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78Krista Lagus, Tommi Vatanen, Oili Kettunen, Antti Heikkilä, Matti Heikkilä, Mika Pantzar, and Timo Honkela. Paths of wellbeing on self-organizing maps. In Advances in Self-Organizing Maps, pages 345–352, 2013.
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2012

77Sami Virpioja, Mari-Sanna Paukkeri, Abhishek Tripathi, Tiina Lindh-Knuutila, and Krista Lagus. Evaluating vector space models with canonical correlation analysis. Natural Language Engineering, 18(03):399–436, July 2012.
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76Timo Honkela, Zaur Izzatdust, and Krista Lagus. Text mining for wellbeing: Selecting stories using semantic and pragmatic features. In Proceedings of ICANN 2012, 22nd International Conference on Artificial Neural Networks, Volume II, pages 467–474, 2012.
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75Tommi Vatanen, Matti Heikkilä, Timo Honkela, Oili Kettunen, Krista Lagus, and Mika Pantzar. Kuntotiedot kartalle - erilaiset hyvä- ja huonokuntoisten ryhmät näkyviin. Liikunta & Tiede, 49(2-3):48–53, 2012.
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74Tommi Vatanen, Ilari T. Nieminen, Timo Honkela, Tapani Raiko, and Krista Lagus. Controlling self-organization and handling missing values in SOM and GTM. In Proceedings of WSOM 2012, pages 55–64, 2012.
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73Timo Honkela, Juha Raitio, Krista Lagus, Ilari T. Nieminen, Nina Honkela, and Mika Pantzar. Subjects on objects in contexts: Using GICA method to quantify epistemological subjectivity. In Proceedings of IJCNN 2012, International Joint Conference on Neural Networks, pages 2875–2883, 2012.
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72Eric Malmi, Juha Raitio, Oskar Kohonen, Krista Lagus, and Timo Honkela. Identifying anomalous social contexts from mobile proximity data using binomial mixture models. In Jaakko Hollmén, Frank Klawonn, and Allan Tucker, editors, Advances in Intelligent Data Analysis XI, pages 195–206, 2012.
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2011

71Sami Virpioja, Minna Lehtonen, Annika Hultén, Riitta Salmelin, and Krista Lagus. Predicting reaction times in word recognition by unsupervised learning of morphology. In Timo Honkela, Wlodzislaw Duch, Mark Girolami, and Samuel Kaski, editors, Artificial Neural Networks and Machine Learning — ICANN 2011, volume 6791 of Lecture Notes in Computer Science, pages 275–282. Springer Berlin / Heidelberg, June 2011.
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70Sami Virpioja, Oskar Kohonen, and Krista Lagus. Evaluating the effect of word frequencies in a probabilistic generative model of morphology. In Bolette Sandford Pedersen, Gunta Nešpore, and Inguna Skadina, editors, Proceedings of the 18th Nordic Conference of Computational Linguistics (NODALIDA 2011), volume 11 of NEALT Proceedings Series, pages 230–237. Northern European Association for Language Technology, Riga, Latvia, May 2011.
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69Paula C. Kyro, Tiina Lindh-Knuutila, and Krista Lagus. Explorative Research Of Entrepreneurial Learning Paths As Interplay Between Cognitive, Conative and Affective Processes (Summary). In Frontiers of Entrepreneurship Research, volume 31. Babson college, 2011.
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2010

68Timo Honkela, Nina Janasik, Krista Lagus, Tiina Lindh-Knuutila, Mika Pantzar, and Juha Raitio. Gica: Grounded intersubjective concept analysis - a method for enhancing mutual understanding and participation. Technical Report TKK-ICS-R41, AALTO-ICS, ESPOO, December 2010.
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67Oskar Kohonen, Sami Virpioja, Laura Leppänen, and Krista Lagus. Semi-supervised extensions to Morfessor Baseline. In Mikko Kurimo, Sami Virpioja, and Ville T. Turunen, editors, Proceedings of the Morpho Challenge 2010 Workshop, pages 30–34, Espoo, Finland, September 2010. Aalto University School of Science and Technology, Department of Information and Computer Science. Technical Report TKK-ICS-R37.
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66Mikko Kurimo, Sami Virpioja, Ville Turunen, and Krista Lagus. Morpho challenge 2005-2010: Evaluations and results. In Proceedings of the 11th Meeting of the ACL Special Interest Group on Computational Morphology and Phonology, pages 87–95, Uppsala, Sweden, July 2010. Association for Computational Linguistics.
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65Oskar Kohonen, Sami Virpioja, and Krista Lagus. Semi-supervised learning of concatenative morphology. In Proceedings of the 11th Meeting of the ACL Special Interest Group on Computational Morphology and Phonology, pages 78–86, Uppsala, Sweden, July 2010. Association for Computational Linguistics.
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64Timo Honkela, Tiina Lindh-Knuutila, and Krista Lagus. Measuring Adjective Spaces. Proceedings of ICANN 2010, Artificial Neural Networks, pages 351–355, 2010.
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63Ilkka Kivimäki, Krista Lagus, Ilari T. Nieminen, Jaakko Väyrynen, and Timo Honkela. Using Correlation Dimension for Analysing Text Data. Proceedings of ICANN 2010, Artificial Neural Networks, pages 368–373, 2010.
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62Sami Virpioja, Oskar Kohonen, and Krista Lagus. Unsupervised morpheme analysis with Allomorfessor. In Multilingual Information Access Evaluation I. Text Retrieval Experiments: 10th Workshop of the Cross-Language Evaluation Forum, CLEF 2009, Corfu, Greece, September 30 - October 2, 2009, Revised Selected Papers, volume 6241 of Lecture Notes in Computer Science, pages 609–616. Springer, 2010.
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2009

61Oskar Kohonen, Sami Virpioja, and Krista Lagus. Constructionist approaches to grammar inference. In NIPS Workshop on Grammar Induction, Representation of Language and Language Learning, Whistler, Canada, December 2009. Extended abstract.
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60Krista Lagus, Mathias Creutz, Sami Virpioja, and Oskar Kohonen. Morpheme segmentation by optimizing two-part MDL codes. In 2009 Workshop on Information Theoretic Methods in Science and Engineering (WITMSE), Tampere, Finland, August 2009. Extended abstract.
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59Krista Lagus, Oskar Kohonen, and Sami Virpioja. Towards unsupervised learning of constructions from text. In Magnus Sahlgren and Ola Knutsson, editors, Proceedings of the Workshop on Extracting and Using Constructions in NLP of 17th Nordic Conference on Computational Linguistics, NODALIDA, May 2009. SICS Technical Report T2009:10.
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58Timo Honkela, Nina Janasik, Krista Lagus, Tiina Lindh-Knuutila, Mika Pantzar, and Juha Raitio. Modeling communities of experts – conceptual grounding of expertise. Technical Report TKK-ICS-R24, Helsinki University of Technology, 2009.
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2007

57Esa Alhoniemi, Antti Honkela, Krista Lagus, Jeremias Seppä, Paul Wagner, and Harri Valpola. Compact modeling of data using independent variable group analysis. IEEE Transactions on Neural Networks, 18(6):1762–1776, 2007.
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56Mathias Creutz and Krista Lagus. Unsupervised models for morpheme segmentation and morphology learning. ACM Transactions on Speech and Language Processing, 4(1), January 2007.
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2006

55Esa Alhoniemi, Antti Honkela, Krista Lagus, Jeremias Seppä, Paul Wagner, and Harri Valpola. Compact modeling of data using independent variable group analysis. Technical Report E3, Helsinki University of Technology, Publications in Computer and Information Science, Espoo, Finland, 2006.
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54Tiina Lindh-Knuutila, Timo Honkela, and Krista Lagus. Simulating meaning negotiation using observational language games. In P. Vogt et al., editor, Symbol Grounding and Beyond: Proceedings of the Third International Workshop on the Emergence and Evolution of Linguistic Communication, pages 168–179, Rome, Italy, 2006. Springer, Berlin/Heidelberg.
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53Mikko Kurimo, Mathias Creutz, and Krista Lagus. Proceedings of the PASCAL Challenge Workshop on Unsupervised segmentation of words into morphemes. PASCAL European Network of Excellence, Venice, Italy, 2006.
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52Krista Lagus and Timo Honkela. Kognitiivinen mallintaminen. In H. Hämäläinen, M. Laine, O. Aaltonen, and A. Revonsuo, editors, Mieli ja aivot. Kognitiivisen neurotieteen oppikirja, pages 61–70. Turun yliopisto, 2006.
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51Mathias Creutz, Krista Lagus, and Sami Virpioja. Unsupervised morphology induction using Morfessor. In A. Yli-Jyrä, L. Karttunen, and J. Karhumäki, editors, Finite-State Methods and Natural Language Processing (FSMNLP 2005), volume 4002 of Lecture Notes in Computer Science, pages 300–301. Springer-Verlag Berlin Heidelberg, 2006. Abstract of software demo.
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2005

50Krista Lagus, Mathias Creutz, and Sami Virpioja. Latent linguistic codes for morphemes using Independent Component Analysis. In A. Cangelosi, G. Bugmann, and R. Borisyuk, editors, Modeling language, cognition and action: Proceedings of the Ninth Neural Computation and Psychology Workshop (NCPW9), September 2005.
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49Krista Lagus, Esa Alhoniemi, Jeremias Seppä, Antti Honkela, and Paul Wagner. Independent variable group analysis in learning compact representations for data. In Timo Honkela, Ville Könönen, Matti Pöllä, and Olli Simula, editors, Proceedings of the International and Interdisciplinary Conference on Adaptive Knowledge Representation and Reasoning (AKRR'05), pages 49–56, Espoo, Finland, June 2005.
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48Ann Russell, Timo Honkela, Krista Lagus, and Matti Pöllä, editors. Proceedings of AMKLC'05, International Symposium on Adaptive Models of Knowledge, Language and Cognition. Helsinki University of Technology, Espoo, Finland, June 2005.
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47Mathias Creutz and Krista Lagus. Inducing the morphological lexicon of a natural language from unannotated text. In Proceedings of AKRR'05, International and Interdisciplinary Conference on Adaptive Knowledge Representation and Reasoning, pages 106–113, Espoo, Finland, June 2005.
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46Mathias Creutz, Krista Lagus, Krister Lindén, and Sami Virpioja. Morfessor and Hutmegs: Unsupervised morpheme segmentation for highly-inflecting and compounding languages. In Proceedings of the Second Baltic Conference on Human Language Technologies, pages 107–112, April 2005.
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45Krista Lagus. Miten hermoverkkomallit selittävät kielen oppimista. In A.M. Korpijaakko-Huuhka, S. Pekkala, and H. Heimo, editors, Kielen ja kognition suhde, volume 37. Yliopistopaino, Helsinki, 2005.
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44Mathias Creutz and Krista Lagus. Unsupervised morpheme segmentation and morphology induction from text corpora using Morfessor 1.0. Technical Report A81, Publications in Computer and Information Science, Helsinki University of Technology, 2005. http://www.cis.hut.fi/projects/morpho/.
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43Timo Honkela, Kevin Hynnä, Krista Lagus, and Jaakko Särelä. Adaptive and statistical approaches in conceptual modeling. Technical report A75, Helsinki University of Technology, Laboratory of Computer and Information Science, Neural Networks Research Center, 2005.
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2004

42Mathias Creutz and Krista Lagus. Induction of a simple morphology for highly-inflecting languages. In Proceedings of the 7th Meeting of the ACL Special Interest Group in Computational Phonology (SIGPHON), pages 43–51, Barcelona, July 2004.
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41Krista Lagus, Samuel Kaski, and Teuvo Kohonen. Mining massive document collections by the WEBSOM method. Information Sciences, 163(1–3):135–156, 2004.
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2003

40Mikko Kurimo and Krista Lagus. Retrieving a user language model from an unsupervised document map. In Machine Learning Meets the User Interface, A workshop at NIPS 2003, Whistler, Canada, December 2003. Poster.
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39T. Honkela, M. Kurimo, K. Lagus, V. Lantz, and E. Oja. Unsupervised learning in human-computer interfaces. In Adjunct Proceedings of Human-Computer Interaction International, pages 121–122, June 2003. Poster.
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2002

38Krister Lindén and Krista Lagus. Word sense disambiguation in document space. In 2002 IEEE International Symposium on Natural Language Processing and Knowledge Engineering (NLPKE 2002), Tunisia, October 2002. Electronic proceedings (CD-ROM).
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37Mathias Creutz and Krista Lagus. Unsupervised discovery of morphemes. In Proceedings of the Workshop on Morphological and Phonological Learning of ACL-02, pages 21–30, Philadelphia, Pennsylvania, July 2002.
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36Krista Lagus, Anu Airola, and Mathias Creutz. Data analysis of conceptual similarities of Finnish verbs. In Proceedings of the CogSci 2002, pages 566–571, Fairfax, Virginia, 2002.
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35Kristiina Jokinen, Antti Kerminen, Mauri Kaipainen, Tommi Jauhiainen, Markku Turunen, Jaakko Hakulinen, Jukka Kuusisto, and Krista Lagus. Adaptive dialogue systems — interaction with interact. In 3rd SIGdial Workshop on Discourse and Dialogue, July 11 and 12, 2002, pages 64–73, 2002.
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34Krista Lagus and Mikko Kurimo. Language model adaptation in speech recognition using document maps. In 2002 IEEE International workshop on neural networks for signal processing, September 4-6, 2002, pages 627–636, Martigny, Switzerland, 2002.
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33Mikko Kurimo and Krista Lagus. An efficiently focusing large vocabulary language model. In International Conference on Artificial Neural Networks, ICANN'02, 2002. 1068–1073.
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32Krista Lagus and Jukka Kuusisto. Topic identification in natural language dialogues using neural networks. In 3rd SIGdial Workshop on Discourse and Dialogue of ACL'02, July 11 and 12, 2002, pages 95–102, 2002.
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31Ella Bingham, Jukka Kuusisto, and Krista Lagus. Ica and som in text document analysis. In The 25th ACM SIGIR Conference on Research and Development in Information Retrieval, August 11-15, 2002, Tampere, Finland, pages 361–362, 2002.
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30Krista Lagus. Text retrieval using self-organized document maps. Neural Processing Letters., 15(1):21–29, 2002.
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2001

29Krista Lagus, Esa Alhoniemi, and Harri Valpola. Independent variable group analysis. In Georg Dorffner, Horst Bischof, and Kurt Hornik, editors, International Conference on Artificial Neural Networks - ICANN 2001, volume 2130 of LLNCS, pages 203–210, Vienna, Austria, August 2001. Springer.
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28Krista Lagus. Studying similarities in term usage with self-organizing maps. In Proceedings of NordTerm'01, pages 34–45, Helsinki, Finland, June 13.-16. 2001.
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27Vesa Siivola, Mikko Kurimo, and Krista Lagus. Large vocabulary statistical language modeling for continuous speech recognition. In Proceedings of 7th European Conference on Speech Communication and Technology, Aalborg, Copenhagen, 2001.
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26Krista Lagus and Anu Airola. Analysis of functional similarities of finnish verbs using the self-organizing map. In Alessandro Lenci, Simonetta Montemagni, and Vito Pirelli, editors, Appeared in the ESSLLI'01 Workshop on The Acquisition and Representation of Word Meaning, 2001.
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2000

25Krista Lagus. Text mining with the WEBSOM. Acta Polytechnica Scandinavica, Mathematics and Computing Series No. 110, December 2000. D.Sc(Tech) Thesis, Helsinki University of Technology, Finland.
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24Krista Lagus. Text retrieval using self-organized document maps. Technical report A61, Helsinki University of Technology, Laboratory of Computer and Information Science, Espoo, Finland, August 2000.
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23Teuvo Kohonen, Samuel Kaski, Krista Lagus, Jarkko Salojärvi, Vesa Paatero, and Antti Saarela. Organization of a massive document collection. IEEE Transactions on Neural Networks, Special Issue on Neural Networks for Data Mining and Knowledge Discovery, 11(3):574–585, May 2000.
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1999

22Krista Lagus, Timo Honkela, Samuel Kaski, and Teuvo Kohonen. WEBSOM for textual data mining. Artificial Intelligence Review, 13(5/6):345–364, December 1999.
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21Krista Lagus and Samuel Kaski. Keyword selection method for characterizing text document maps. In Proceedings of ICANN99, Ninth International Conference on Artificial Neural Networks, volume 1, pages 371–376. IEE, London, 1999.
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20Teuvo Kohonen, Samuel Kaski, Krista Lagus, Jarkko Salojärvi, Jukka Honkela, Vesa Paatero, and Antti Saarela. Self organization of a massive text document collection. In Erkki Oja and Samuel Kaski, editors, Kohonen Maps, pages 171–182. Elsevier, Amsterdam, 1999.
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1998

19Krista Lagus. Generalizability of the websom method to document collections of various types. In Proc. of 6th European Congress on Intelligent Techniqes & Soft Computing (EUFIT'98)., volume 1, pages 210–214, Aachen, Germany, September 7-10 1998.
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18Timo Honkela, Krista Lagus, and Samuel Kaski. Self-organizing maps of large document collections. In Guido Deboeck and Teuvo Kohonen, editors, Visual Explorations in Finance with Self-Organizing Maps, pages 168–178. Springer, London, 1998.
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17T. Honkela, S. Kaski, T. Kohonen, and K. Lagus. Self-organizing maps of very large document collections: Justification for the WEBSOM method. In I. Balderjahn, R. Mathar, and M. Schader, editors, Classification, Data Analysis, and Data Highways, pages 245–252. Springer, Berlin, 1998.
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16Samuel Kaski, Timo Honkela, Krista Lagus, and Teuvo Kohonen. WEBSOM—self-organizing maps of document collections. Neurocomputing, 21:101–117, 1998.
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15S. Kaski, K. Lagus, T. Honkela, and T. Kohonen. Statistical aspects of the WEBSOM system in organizing document collections. Computing Science and Statistics, 29:281–290, 1998. (Scott, D. W., ed.), Interface Foundation of North America, Inc.: Fairfax Station, VA.
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1997

14Samuel Kaski. Data exploration using self-organizing maps. Acta Polytechnica Scandinavica, Mathematics, Computing and Management in Engineering Series No. 82, March 1997. D.Sc.(Tech) Thesis, Helsinki University of Technology, Finland.
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13Timo Honkela. Self-Organizing Maps in Natural Language Processing. PhD thesis, Helsinki University of Technology, Espoo, Finland, 1997.
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12Timo Honkela, Samuel Kaski, Krista Lagus, and Teuvo Kohonen. WEBSOM—self-organizing maps of document collections. In Proceedings of WSOM'97, Workshop on Self-Organizing Maps, Espoo, Finland, June 4-6, pages 310–315. Helsinki University of Technology, Neural Networks Research Centre, Espoo, Finland, 1997.
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11Samuel Kaski. Computationally efficient approximation of a probabilistic model for document representation in the WEBSOM full-text analysis method. Neural Processing Letters, 5:139–151, 1997.
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10Teuvo Kohonen. Exploration of very large databases by self-organizing maps. In Proceedings of ICNN'97, International Conference on Neural Networks, pages PL1–PL6. IEEE Service Center, Piscataway, NJ, 1997.
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9Krista Lagus. Map of WSOM'97 abstracts—alternative index. In Proceedings of WSOM'97, Workshop on Self-Organizing Maps, Espoo, Finland, June 4-6, pages 368–372. Helsinki University of Technology, Neural Networks Research Centre, Espoo, Finland, 1997.
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1996

8Timo Honkela, Samuel Kaski, Krista Lagus, and Teuvo Kohonen. Newsgroup exploration with WEBSOM method and browsing interface. Technical Report A32, Helsinki University of Technology, Laboratory of Computer and Information Science, Espoo, Finland, 1996.
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7Timo Honkela, Samuel Kaski, Krista Lagus, and Teuvo Kohonen. Self-organizing maps of document collections. ALMA, 1(2), 1996. Electronic Journal, address http://www.diemme.it/ luigi/alma.html.
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6Timo Honkela, Samuel Kaski, Krista Lagus, and Teuvo Kohonen. Exploration of full-text databases with self-organizing maps. In Proceedings of the ICNN96, International Conference on Neural Networks, volume I, pages 56–61. IEEE Service Center, Piscataway, NJ, 1996.
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5Samuel Kaski, Timo Honkela, Krista Lagus, and Teuvo Kohonen. Creating an order in digital libraries with self-organizing maps. In Proceedings of WCNN'96, World Congress on Neural Networks, September 15-18, San Diego, California, pages 814–817. Lawrence Erlbaum and INNS Press, Mahwah, NJ, 1996.
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4Teuvo Kohonen, Samuel Kaski, Krista Lagus, and Timo Honkela. Very large two-level SOM for the browsing of newsgroups. In C. von der Malsburg, W. von Seelen, J. C. Vorbrüggen, and B. Sendhoff, editors, Proceedings of ICANN96, International Conference on Artificial Neural Networks, Bochum, Germany, July 16-19, 1996, Lecture Notes in Computer Science, vol. 1112, pages 269–274. Springer, Berlin, 1996.
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3Krista Lagus, Samuel Kaski, Timo Honkela, and Teuvo Kohonen. Browsing digital libraries with the aid of self-organizing maps. In Proceedings of the Fifth International World Wide Web Conference WWW5, May 6-10, Paris, France, volume Poster Proceedings, pages 71–79. EPGL, 1996.
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2Krista Lagus, Timo Honkela, Samuel Kaski, and Teuvo Kohonen. WEBSOM – a status report. In Jarmo Alander, Timo Honkela, and Matti Jakobsson, editors, Proceedings of STeP'96, Finnish Artificial Intelligence Conference, pages 73–78. Finnish Artificial Intelligence Society, Vaasa, Finland, 1996.
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1Krista Lagus, Timo Honkela, Samuel Kaski, and Teuvo Kohonen. Self-organizing maps of document collections: A new approach to interactive exploration. In Evangelios Simoudis, Jiawei Han, and Usama Fayyad, editors, Proceedings of the Second International Conference on Knowledge Discovery and Data Mining, pages 238–243. AAAI Press, Menlo Park, California, 1996.
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