Xavier Llorà

Archive for 'Human-Computer Interaction' Category

Ben Shneiderman at UIUC

18 April 2007

You can find my notes for his presentation here.

One talk and a visit to UK

8 October 2006

September 21 I was invited to give a talk at the Computer Science Department at UIUC. During the talk “Combating User Fatigue and Contradictions in Subjective-based Optimization Schemes” I reviewed some of the research I have been involved about active interactive genetic algorithms. The PDF of the presentation can be downloaded here. I also gave the same presentation to some of the members of the ASAP research group at the University of Nottingham. Natalio Krasnogor invited me for a visit. The main topic was latest advances on Pittsburgh LCS (Jaume Bacardit is working there on protein folding problems using Pitt-style LCS). I really enjoyed interact with people there—lots of challenges and interesting discussions. Oh, I almost forgot, the three days I was in Nottingham I saw the sun most of the day :).

Evolving emotional prosody

17 September 2006

by Cecilia Ovesdotter Alm and Xavier Llorà (2006).
Proceedings of the Ninth International Conference on Spoken Language Processing (INTERSPEECH 2006), paper 1741. Also as IlliGAL TR No 2006018. Link to the PDF.

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GECCO 2006

8 July 2006

Well, it finally happened. GECCO started today at 8:30am. You can find live blogging at the IlliGAL Blogging.

Analyzing active interactive genetic algorithms using visual analytics

7 July 2006

by Xavier Llorà, Kumara Sastry , Francesc Alías, David E. Goldberg, and Michael Welge (2006).
Proceedings of the ACM Genetic and Evolutionary Computation Conference (GECCO 2006), pp. 1417–1418, ACM press. Also as IlliGAL TR No 2006004. Link to the PDF.

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Innovation and creativity support via chance discovery, genetic algorithms, and data mining

1 March 2006

by Xavier Llorà and David E. Goldberg, Yukio Ohsawa, Naohiro Matsumura, Yuichi Washida, Hiroshi Tamura, Masataka Yoshikawa, Michael Welge, Loretta Auvil, Duane Searshmith, Kei Ohnishi, and Chen-Ju Chao (2006).
New Mathematics and Natural Computation, World Scientific, pp. 2(1):85–100. Link to the Journal publication.

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The innovation pump: Supporting creative processes in collaborative engineering

26 February 2006

by Xavier Llorà and David E. Goldberg (2006).
IlliGAL TR No 2006011. Link to the PDF.

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A simple UMDAc implementation in Java

6 December 2005

Cecilia Oversdotter is working on an adaptation of active interactive genetic algorithms (some papers can be found here and here) to her work on speech synthesis and perception of emotions in expressive storytelling. She needs a version of the active interactive genetic algorithm that works on continuous domains. For that reason I coded a version of UMDAc to replace the cGA currently used for discrete domains.

The Java implementation of UMDAc can be found here. In order to run it, you need to download the COLT toolkit . The code is distributed under GPL license.

Evaluation consistency in iGAs: User contradictions as cycles in partial-ordering graphs

27 November 2005

by Francesc Alías, Xavier Llorà, Lluís Formiga, Kumara Sastry, and David E. Goldberg (2006, accepted).
IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2006). May 14-19, 2006. Also as IlliGAL TR No 2005022. Link to the PDF.

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Combating user fatigue in iGAs: Partial ordering, support vector machines, and synthetic fitness

19 July 2005

by Llorà, X., Sastry, K., Goldberg, D.E., Gupta, A., Lakshmi, L. (2005).
Published in the ACM Genetic and Evolutionary Computation Conference (GECCO 2005), ACM press, pp. 1363–1371. Also as IlliGAL TR No 2005009. Link to the PDF

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