Asterios Toutios

Mountain View, CA
+1 213 344 9509
toutios[at]gmail.com

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about

I am a data scientist at EarliTec Diagnostics, where I spearhead AI/ML initiatives toward making earlier identification and treatment for autism accessible to children everywhere. Previously, I had a trajectory as an academic speech scientist that culminated in a research faculty appointment at the University of Southern California.

My academic research had focused on modeling human speech production based on direct observations of the vocal-tract dynamic configuration. I led the collection, curation, and dissemination of several large speech MRI corpora from USC, and the development of a framework for articulatory speech synthesis from phonological specifications based on such data.

I received academic degrees in Thessaloniki, Greece: Diploma/MEng in Electrical and Computer Engineering (1999, Aristotle University); MSc in Information Systems (2002, University of Macedonia); PhD in Applied Informatics (2007, University of Macedonia). Much more recently (2022), I achieved a MicroMasters Program Credential in Statistics and Data Science from MIT.

Following my PhD I held postdoctoral research positions in France, at LORIA (2007-2011) and TELECOM ParisTech (2011-2012). I joined USC Electrical and Computer Engineering in 2012 as a research associate, and was promoted to assistant research professor in 2017–a position that I held until 2021. Between that and joining EarliTec, I was briefly involved with startups in accent conversion and social media analytics.

A while back, I used to write poetry. I have published some short collections online and translated them from Greek to English.

I play the guitar and sing. I have been uploading youtube videos of me doing so. And I have written lyrics and sung for a little known alternative rock band. You might say we had a cult following.

publications

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2023

• Yijing Lu, Haley Hsu, Louis Goldstein, Asterios Toutios, "Effect of Individual Vocal Tract Geometry on the Tongue Shaping for American English /ɹ/", International Congress of Phonetic Sciences (ICPhS 2023), Prague, Czech Republic, 2023.

2022

• Christina Hagedorn, Yijing Lu, Asterios Toutios, Uttam Sinha, Louis Goldstein, Shrikanth Narayanan, "Variation in compensatory strategies as a function of target constriction degree in post-glossectomy speech", The Journal of the Acoustical Society of America, vol. 2, no. 4, pp. 045205, 2022.

2021

• Yongwan Lim, Asterios Toutios, Yannick Bliesener, Ye Tian, Sajan Goud Lingala, Colin Vaz, Tanner Sorensen, Miran Oh, Sarah Harper, Weiyi Chen, Yoonjeong Lee, Johannes Töger, Mairym Lloréns Montesserin, Caitlin Smith, Bianca Godinez, Louis Goldstein, Dani Byrd, Krishna S. Nayak, Shrikanth S. Narayanan, "A multispeaker dataset of raw and reconstructed speech production real-time MRI video and 3D volumetric images", Scientific Data, vol. 8, no. 187, 2021.

• Yijing Lu, Justin Ly, Shrikanth Narayanan, Louis Goldstein, Asterios Toutios, "Modeling speaker-specific vocal tract kinematics from gestural scores", The Journal of the Acoustical Society of America, vol. 150, no. 4, pp. A188-A189, 2021.
• Yijing Lu, Haley Hsu, Louis Goldstein, Asterios Toutios, "Effect of vocal tract morphology on tongue shaping for American English /ɹ/", The Journal of the Acoustical Society of America, vol. 150, no. 4, pp. A188-A188, 2021.

2020

• Asterios Toutios, Melissa Xu, Dani Byrd, Louis Goldstein, Shrikanth Narayanan, "How an aglossic speaker produces an alveolar-like percept without a functional tongue tip", The Journal of the Acoustical Society of America, vol. 147, no. 6, pp. EL460-EL464, 2020.
• Jangwon Kim, Asterios Toutios, Sungbok Lee, Shrikanth S. Narayanan, "Vocal tract shaping of emotional speech", Computer Speech & Language, vol. 64, pp. 101100, 2020.

• Michael Proctor, Yinghua Zhu, Adam Lammert, Asterios Toutios, Bonny Sands, Shrikanth Narayanan, "Studying Clicks Using Real-Time MRI", Click Consonants (Bonny Sands, ed.), Brill, Leiden, The Netherlands, pp. 210 - 240, 2020.

• Ashwin Hebbar, Rahul Sharma, Krishna Somandepalli, Asterios Toutios, Shrikanth S. Narayanan, "Vocal tract articulatory contour detection in real-time magnetic resonance images using spatio-temporal context", IEEE International Conference on Audio, Speech and Signal Processing (ICASSP), Barcelona, Spain, 2020.

• Melissa Xu, Asterios Toutios, Tanner Sorensen, Shrikanth Narayanan, "Using real-time MRI to assess the development of jaw contribution in constriction formation synergies during early adolescence", International Seminar on Speech Production (ISSP), Providence, RI, 2020.
• Asterios Toutios, Shrikanth Narayanan, "Simulating anticipatory coarticulation in VCV utterances with a gestural articulatory synthesizer", International Seminar on Speech Production (ISSP), Providence, RI, 2020.

2019

• Rachel Alexander, Tanner Sorensen, Asterios Toutios, Shrikanth Narayanan, "A modular architecture for articulatory synthesis from gestural specification", The Journal of the Acoustical Society of America, vol. 146, no. 6, pp. 4458-4471, 2019.
• Tanner Sorensen, Asterios Toutios, Louis Goldstein, Shrikanth Narayanan, "Task-dependence of articulator synergies", The Journal of the Acoustical Society of America, vol. 145, no. 3, pp. 1504-1520, 2019.
• Christina Hagedorn, Tanner Sorensen, Adam Lammert, Asterios Toutios, Louis Goldstein, Dani Byrd, Shrikanth Narayanan, "Engingeering innovation in speech science: data and technologies", Perspectives of the ASHA Special Interest Groups, pp. 1-10, 2019.

• Asterios Toutios, Dani Byrd, Louis Goldstein, Shrikanth Narayanan, "Advances in vocal tract imaging and analysis.", The Routledge Handbook of Phonetics (William Katz, Peter Assmann, eds.), Routledge, London and New York, 2019.

• Asterios Toutios, Reed Blaylock, Louis Goldstein, Shrikanth S. Narayanan, "Toward cross-speaker articulatory modeling", The Journal of the Acoustical Society of America, vol. 146, no. 4, pp. 3085-3085, 2019.
• Bianca P. Godinez, Asterios Toutios, Shrikanth S. Narayanan, "A real-time magnetic resonance imaging study of cross-speaker variability in the production of /ɹ/", The Journal of the Acoustical Society of America, vol. 146, no. 4, pp. 3083-3083, 2019.

2018

• Tanner Sorensen, Alison Yu, Asterios Toutios, Brenda Villegas, Melody Ouyoung, Shrikanth Narayanan, Uttam Sinha, "Feasibility of real-time magnetic resonance imaging of true vocal fold paralysis", Poster presentation at the American Academy of Otolaryngology—Head and Neck Surgery Foundation Annual Meeting and OTO Experience, Atlanta, GA, 2018.

2017

• Johannes Töger, Tanner Sorensen, Krishna Somandepalli, Asterios Toutios, Sajan Goud Lingala, Shrikanth Narayanan, Krishna Nayak, "Test–retest repeatability of human speech biomarkers from static and real-time dynamic magnetic resonance imaging", The Journal of the Acoustical Society of America, vol. 141, no. 5, pp. 3323-3336, 2017.
• Betty McMicken, Frederico Salles, Shelley Von Berg, Margaret Vento-Wilson, Kelly Rogers, Asterios Toutios, Shrikanth S. Narayanan, "Bilabial substitution patterns during consonant production in a case of congenital aglossia", Journal of Communication Disorders, Deaf Studies & Hearing Aids, vol. 5, no. 2, pp. 1-6, 2017.
• Sajan Goud Lingala, Yinghua Zhu, Yongwan Lim, Asterios Toutios, Yunhua Ji, Wei-Ching Lo, Nicole Seiberlich, Shrikanth Narayanan, Krishna S. Nayak, "Feasibility of through-time spiral generalized autocalibrating partial parallel acquisition for low latency accelerated real-time MRI of speech", Magnetic Resonance in Medicine, vol. 78, no. 6, pp. 2275-2282, 2017.
• Sajan Goud Lingala, Yinghua Zhu, Yoon-Chul Kim, Asterios Toutios, Shrikanth Narayanan, Krishna S. Nayak, "A fast and flexible MRI system for the study of dynamic vocal tract shaping", Magnetic Resonance in Medicine, vol. 77, no. 1, pp. 112-125, 2017.

• Rachel Alexander, Tanner Sorensen, Asterios Toutios, Shrikanth S. Narayanan, "VCV synthesis using Task Dynamics to animate a factor-based articulatory model", Interspeech, Stockholm, Sweden, 2017.
• Krishna Somandepalli, Asterios Toutios, Shrikanth S. Narayanan, "Semantic edge detection for tracking vocal tract air-tissue boundaries in real-time magnetic resonance images", Interspeech, Stockholm, Sweden, 2017.
• Tanner Sorensen, Zisis Skordilis, Asterios Toutios, Yoon-Chul Kim, Yinghua Zhu, Jangwon Kim, Adam Lammert, Vikram Ramanarayanan, Louis Goldstein, Dani Byrd, Krishna Nayak, Shrikanth S. Narayanan, "Database of volumetric and real-time vocal tract MRI for speech science", Interspeech, Stockholm, Sweden, 2017.
• Tanner Sorensen, Asterios Toutios, Johannes Töger, Louis Goldstein, Shrikanth S. Narayanan, "Test-retest repeatability of articulatory strategies using real-time magnetic resonance imaging", Interspeech, Stockholm, Sweden, 2017.
• Jieshen Chen, Sajan Goud Lingala, Yongwan Lim, Asterios Toutios, Shrikanth Narayanan, Krishna Nayak, "Task-based optimization of regularization in highly accelerated speech RT-MRI", International Society for Magnetic Resonance in Medicine (ISMRM) 25th Scientific Sessions, Honolulu, HI, 2017.
• Johannes Töger, Tanner Sorensen, Krishna Somandepalli, Asterios Toutios, Sajan Goud Lingala, Shrikanth Narayanan, Krishna Nayak, "Test–retest repeatability of human speech biomarkers from static and real-time dynamic magnetic resonance imaging", International Society for Magnetic Resonance in Medicine (ISMRM) 25th Scientific Sessions, Honolulu, HI, 2017.
• Zisis Skordilis, Asterios Toutios, Johannes Töger, Shrikanth S. Narayanan, "Estimation of vocal tract area function from volumetric magnetic resonance imaging", IEEE International Conference on Audio, Speech and Signal Processing (ICASSP), New Orleans, LA, 2017.

• Tanner Sorensen, Asterios Toutios, Louis Goldstein, Shrikanth Narayanan, "Decomposing vocal tract constrictions into articulator contributions using real-time magnetic resonance imaging", Speech Motor Control, Groningen, The Netherlands, pp. 19, 2017.
• Asterios Toutios, Dani Byrd, Louis Goldstein, Shrikanth S. Narayanan, "Articulatory compensation strategies employed by an aglossic speaker", The Journal of the Acoustical Society of America, vol. 142, no. 4, pp. 2639-2639, 2017.
• Tanner Sorensen, Asterios Toutios, Louis Goldstein, Shrikanth S. Narayanan, "Tracking developmental changes in articulatory strategy during childhood", The Journal of the Acoustical Society of America, vol. 142, no. 4, pp. 2584-2584, 2017.
• Miran Oh, Asterios Toutios, Dani Byrd, Louis Goldstein, Shrikanth S. Narayanan, "Tracking larynx movement in real-time MRI data", The Journal of the Acoustical Society of America, vol. 142, no. 4, pp. 2579-2579, 2017.
• Mairym Llorens, Dani Byrd, Nancy Vazquez, Louis Goldstein, Tanner Sorensen, Asterios Toutios, Shrikanth S. Narayanan, "Indexing tongue profile narrowing for English lateral consonants using 3D volumetric MR imaging", The Journal of the Acoustical Society of America, vol. 142, no. 4, pp. 2581-2581, 2017.
• Rachel Alexander, Tanner Sorensen, Asterios Toutios, Shrikanth S. Narayanan, "VCV synthesis using Task Dynamics to animate a factor-based articulatory model", Workshop for Young Female Researchers in Speech Science & Technology, Stockholm, Sweden, 2017.

2016

• Asterios Toutios, Shrikanth Narayanan, "Advances in real-time magnetic resonance imaging of the vocal tract for speech science and technology research", APSIPA Transactions on Signal and Information Processing, vol. 5, pp. e6, 2016.

• Michael Proctor, Yinghua Zhu, Adam Lammert, Asterios Toutios, Bonny Sands, Ulrich Hummel, Shrikanth Narayanan, "Click consonant production in Khoekhoe: a real-time MRI study", Khoisan Languages and Linguistics. Proc. 5th Intl. Symposium, July 13-17, 2014, Riezlern/Kleinwalsertal (Sheena Shah, Matthias Brenzinger, eds.), Rüdiger Köppe, Cologne, pp. 337-366, 2016.

• Yongwan Lim, Sajan Goud Lingala, Asterios Toutios, Shrikanth Narayanan, Krishna Nayak, "Improved depiction of tissue boundaries in vocal tract real-time MRI using automatic off-resonance correction", Interspeech, San Francisco, CA, 2016.
• Asterios Toutios, Tanner Sorensen, Krishna Somandepalli, Rachel Alexander, Shrikanth Narayanan, "Articulatory synthesis based on real-time magnetic resonance imaging data", Interspeech, San Francisco, CA, 2016.
• Asterios Toutios, Sajan Goud Lingala, Colin Vaz, Jangwon Kim, John Esling, Patricia Keating, Matthew Gordon, Dani Byrd, Louis Goldstein, Krishna Nayak, Shrikanth Narayanan, "Illustrating the production of the International Phonetic Alphabet sounds using fast real-time magnetic resonance imaging", Interspeech, San Francisco, CA, 2016.
• Colin Vaz, Asterios Toutios, Shrikanth Narayanan, "Convex hull convolutive non-negative matrix factorization for uncovering temporal patterns in multivariate time-series data", Interspeech, San Francisco, CA, 2016.
• Sajan Goud Lingala, Asterios Toutios, Johannes Toger, Yongwan Lim, Yinghua Zhu, Yoon-Chul Kim, Colin Vaz, Shrikanth Narayanan, Krishna Nayak, "State-of-the-art MRI protocol for comprehensive assessment of vocal tract structure and function", Interspeech, San Francisco, CA, 2016.
• Tanner Sorensen, Asterios Toutios, Louis Goldstein, Shrikanth Narayanan, "Characterizing vocal tract dynamics across speakers using real-time MRI", Interspeech, San Francisco, CA, 2016.
• Sajan Goud Lingala, Yinghua Zhu, Yunhua Ji, Asterios Toutios, Wei-Ching Lo, Nicole Seiberlich, Shrikanth S. Narayanan, Krishna S. Nayak, "Accelerating real-time MRI of speech using spiral through-time GRAPPA", International Society for Magnetic Resonance in Medicine (ISMRM) 24th Scientific Sessions, Singapore, 2016.

• Gary Yeung, Steven Lulich, Asterios Toutios, Abeer Alwan, Amber Afshan, "Analysis of children’s high front vowel area function using 3D ultrasound imaging", 172nd Meeting of the Acoustical Society of America, Honolulu, HI, 2016.
• Rachel Alexander, Asterios Toutios, Shrikanth Narayanan, "Articulatory speech synthesis from vocal-tract MRI data", Workshop for Young Female Researchers in Speech Science & Technology, San Francisco, CA, 2016.
• Tanner Sorensen, Asterios Toutios, Louis Goldstein, Shrikanth S. Narayanan, "Characterizing vocal tract dynamics with real-time MRI", 15th Conference on Laboratory Phonology, Ithaca, NY, 2016.

2015

• Sajan Goud Lingala, Yinghua Zhu, Yoon-Chul Kim, Asterios Toutios, Shrikanth S. Narayanan, Krishna S. Nayak, "Towards high frame rate real-time magnetic resonance imaging of speech production", SPIE Newsroom, 2015.
• Jangwon Kim, Asterios Toutios, Sungbok Lee, Shrikanth S. Narayanan, "A kinematic study of critical and non-critical articulators in emotional speech production", The Journal of the Acoustical Society of America, vol. 137, no. 3, pp. 1411-1429, 2015.

• Asterios Toutios, Shrikanth S. Narayanan, "Factor analysis of vocal-tract outlines derived from real-time magnetic resonance imaging data", International Congress of Phonetic Sciences (ICPhS 2015), Glasgow, UK, 2015.

2014

• Shrikanth Narayanan, Asterios Toutios, Vikram Ramanarayanan, Adam Lammert, Jangwon Kim, Sungbok Lee, Krishna Nayak, Yoon-Chul Kim, Yinghua Zhu, Louis Goldstein, Dani Byrd, Erik Bresch, Prasanta Ghosh, Athanasios Katsamanis, Michael Proctor, "Real-time magnetic resonance imaging and electromagnetic articulography database for speech production research (TC)", The Journal of the Acoustical Society of America, vol. 136, no. 3, pp. 1307-1311, 2014. See the database dissemination webpage.

• Michael Proctor, Yinghua Zhu, Adam Lammert, Asterios Toutios, Bonny Sands, Shrikanth Narayanan, "Articulatory coordination in Nama click consonants", 15th Australasian International Conference on Speech Science and Technology, Christchurch, New Zealand, 2014.
• Sajan Goud Lingala, Yinghua Zhu, Yoon-Chul Kim, Asterios Toutios, Shrikanth S. Narayanan, Krishna S. Nayak, "High spatio-temporal resolution multi-slice real time MRI of speech using golden angle spiral imaging with constrained reconstruction, parallel imaging, and a novel upper airway coil", International Society for Magnetic Resonance in Medicine (ISMRM) 20th Scientific Sessions, Toronto, Canada, pp. 1539, 2014.
• Jangwon Kim, Asterios Toutios, Yoon-Chul Kim, Yinghua Zhu, Sungbok Lee, Shrikanth S. Narayanan, "USC-EMO-MRI corpus: An emotional speech production database recorded by real-time magnetic resonance imaging", International Seminar on Speech Production (ISSP), Cologne, Germany, 2014.

2013

• Slim Ouni, Vincent Colotte, Utpala Musti, Asterios Toutios, Brigitte Wrobel-Dautcourt, Marie-Odile Berger, Caroline Lavecchia, "Acoustic-visual synthesis technique using bimodal unit-selection", EURASIP Journal on Audio, Speech, and Music Processing, Springer International Publishing, vol. 2013, no. 1, pp. 1-13, 2013.

• Yoon-Chul Kim, Jangwon Kim, Michael I. Proctor, Asterios Toutios, Krishna S. Nayak, Sungbok Lee, Shrikanth S. Narayanan, "Toward automatic vocal tract area function estimation from accelerated three-dimensional magnetic resonance imaging", ISCA Workshop on Speech Production in Automatic Speech Recognition (SPASR), Lyon, France, 2013.
• Asterios Toutios, Shrikanth S. Narayanan, "Articulatory synthesis of French connected speech from EMA data", Interspeech, Lyon, France, 2013. See also audio material.
• Yinghua Zhu, Asterios Toutios, Shrikanth S. Narayanan, Krishna S. Nayak, "Faster 3D vocal tract real-time MRI using constrained reconstruction", Interspeech, Lyon, France, 2013.
• Michael I. Proctor, Louis Goldstein, Adam Lammert, Dani Byrd, Asterios Toutios, Shrikanth S. Narayanan, "Velic Coordination in French Nasals: a Realtime Magnetic Resonance Imaging Study", Interspeech, Lyon, France, 2013.

2012

• Asterios Toutios, Shinji Maeda, "Articulatory VCV synthesis from EMA data", Interspeech, Portland, OR, 2012. See also audio material.

2011

• Asterios Toutios, Slim Ouni, Yves Laprie, "Estimating the control parameters of an articulatory model from electromagnetic articulograph data", The Journal of the Acoustical Society of America, vol. 129, no. 5, pp. 3245-3257, 2011.

• Utpala Musti, Vincent Colotte, Asterios Toutios, Slim Ouni, "Introducing visual target cost within an acoustic-visual unit-selection speech synthesizer", International Conference on Auditory-Visual Speech Processing (AVSP), Volterra, Italy, 2011.
• Asterios Toutios, Utpala Musti, Slim Ouni, Vincent Colotte, "Weight optimization for bimodal unit-selection talking head synthesis", Interspeech, Florence, Italy, 2011.
• Asterios Toutios, Slim Ouni, "Predicting tongue positions from acoustics and facial features", Interspeech, Florence, Italy, 2011.

2010

• Asterios Toutios, Utpala Musti, Slim Ouni, Vincent Colotte, Brigitte Wrobel-Dautcourt, Marie-Odile Berger, "Towards a true acoustic-visual speech synthesis", International Conference on Auditory-Visual Speech Processing (AVSP), Hakone, Kanagawa, Japan, pp. POS1-8, 2010.
• Utpala Musti, Asterios Toutios, Slim Ouni, Vincent Colotte, Brigitte Wrobel-Dautcourt, Marie-Odile Berger, "HMM-based automatic visual speech segmentation using facial data", Interspeech, Makuhari, Japan, pp. 1401-1404, 2010.
• Asterios Toutios, Utpala Musti, Slim Ouni, Vincent Colotte, Brigitte Wrobel-Dautcourt, Marie-Odile Berger, "Setup for acoustic-visual speech synthesis by concatenating bimodal units", Interspeech, Makuhari, Japan, pp. 486-489, 2010.

2009

• Michael Aron, Asterios Toutios, Marie-Odile Berger, Erwan Kerrien, Brigitte Wrobel-Dautcourt, Yves Laprie, "Registration of multimodal data for estimating the parameters of an articulatory model", IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Taipei, Taiwan, pp. 4489-4492, 2009.

2008

• Asterios Toutios, Konstantinos Margaritis, "Estimating electropalatographic patterns from the speech signal", Computer Speech & Language, Elsevier, vol. 22, no. 4, pp. 346-359, 2008.

• Asterios Toutios, Slim Ouni, Yves Laprie, "Protocol for a model-based evaluation of a dynamic acoustic-to-articulatory inversion method using electromagnetic articulography", International Seminar on Speech Production (ISSP), Strasbourg, France, pp. 317-320, 2008.
• Asterios Toutios, Konstantinos Margaritis, "Contribution to statistical acoustic-to-EMA mapping", European Signal Processing Conference (EUSIPCO), Lausanne, Switzerland, 2008.

2007

• Asterios Toutios, Konstantinos Margaritis, "Enhancing acoustic-to-EPG mapping with lip position information", Interspeech, Antwerp, Belgium, pp. 1374-1377, 2007.

2006

• Asterios Toutios, Konstantinos Margaritis, "Learning electropalatograms from acoustics", IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), vol. I, Toulouse, France, pp. 361-364, 2006.

2005

• Asterios Toutios, Konstantinos Margaritis, "Learning articulation from cepstral coefficients", International Conference on Speech and Computer (SPECOM), Patras, Greece, 2005.
• Asterios Toutios, Konstantinos Margaritis, "Mapping the speech signal onto electromagnetic articulography trajectories using support vector regression", International Conference on Text Speech and Dialogue (TSD), Karlovy Vary, Czech Republic, pp. 318-325, 2005.
• Asterios Toutios, Konstantinos Margaritis, "Mapping between the speech signal and articulatory trajectories", Hellenic European Conference on Computer Mathematics and its Applications (HERCMA), Athens, Greece, 2005.
• Asterios Toutios, Konstantinos Margaritis, "A support vector approach to the acoustic-to-articulatory mapping", Interspeech, Lisbon, Portugal, pp. 3221-3224, 2005.
• Asterios Toutios, Konstantinos Margaritis, "On the acoustic-to-electropalatographic mapping", International Conference on Non-Linear Speech Processing (NOLISP), Barcelona, Spain, pp. 186-195, 2005.

2004

• Asterios Toutios, Konstantinos Margaritis, "Estimating tongue-palate contact patterns from the speech signal", International Conference on Speech and Computer (SPECOM), St. Petersburg, Russia, pp. 158-165, 2004.

2003

• Asterios Toutios, Konstantinos Margaritis, "A rough guide to the acoustic-to-articulatory inversion of speech", Hellenic European Conference on Computer Mathematics and its Applications (HERCMA), Athens, Greece, 2003.
• Asterios Toutios, Konstantinos Margaritis, "Acoustic-to-articulatory inversion of speech: a review", International Turkish Symposium on Artificial Intelligence and Neural Networks (TAINN), Canakkale, Turkey, 2003.

2002

• Asterios Toutios, Konstantinos Margaritis, "Development of a text-dependent speaker identification system with the OGI toolkit", Hellenic Conference on Artificial Intelligence (SETN), Thessaloniki, Greece, 2002.