contact: teemu.roos at cs.helsinki.fi
Between September 21–November 30, 2015, I will be a Visiting Scholar at UC Berkeley, USC and UCSD.
The 8th Workshop on Information Theoretic Methods in Science and Engineering (WITMSE) in Copenhagen on 24–26 June 2015; co-chairs Harremoës, Forchhammer, Roos & Myllymäki. web page.
My traveling/conference schedule in 2015:
- Finnish Institute in Rome, December 27, 2014–January 4, 2015.
- E-Philology Lectures, Sorbonne University, Paris, January 12.
- ITA-2015, San Diego, February 1–6.
- COST Training School, Rome, 23–25 March.
- VU Amsterdam, May 13.
- University of Lancaster, University of Cambridge, May 18–22.
- COIN day, Stockholm, Sweden, June 15.
- WITMSE-2015, Copenhagen, June 24–26.
- AlCoB-2015, Mexico City, August 4–6.
- UC Berkeley, USC, UCSD, September 21–November 30.
- IEEE Big Data 2015, Santa Clara, CA, USA, October 29–November 1.
Since November 2013, following Prof Juho Rousu, I am the host of the Helsinki Distinguished Lecture Series on Future Information Technology.
I have been appointed from 4/2013 onwards as an Assistant Professor (tenure-track) at the Department of Computer Science, University of Helsinki.
Conference and workshop involvement (program committee or equivalent): AISTATS-2011/2014/2015, ECAI-2008, ECML/PKDD-2009/2012, ICDM-2014, IJCAI-2013/2015, NIPS-2014/2015, PGM-2008/2012/2014, S85MC-2011, UAI-2008/2009/2010/2011/2012/2013/2014/2015, WITMSE-2008/2009.
Note that in 2015–2016, the course Introduction to Artificial Intelligence (Johdatus tekoälyyn) will be lectured in the Spring term (period III). The language of the course is Finnish.
I am the instructor of the Undergraduate Research Track (tutkijalinja).
I am currently supervising:
- Janne Leppä-aho (PhD student, 1st year)
- Pedram Daee (PhD student, 2nd year) co-supervised with Prof Sami Kaski
- Jussi Määttä (PhD student, 3rd year)
- Yuan Zou (PhD student, 5th year))
- Tommi Jalkanen (MSc student) co-supervised with Dr Jutta Jokiranta (Theology)
- Antti Takalahti (MSc student) co-supervised with Prof Edward Haeggström (Physics)
- Simo Linkola (MSc student)
- Olli Orajärvi (MSc student)
- Quan Nguyen (MSc 2015)
- Peter Hedman (MSc 2015), co-supervised with Prof Jaakko Lehtinen (Aalto/NVIDIA Corp)
- Arttu Modig (MSc 2014), co-supervised with Prof Jouko Lampinen (Aalto)
- Janne Leppä-aho (MSc 2014), co-supervised with Prof Jukka Corander
- Henning Lübbers (MSc 2012), co-supervised with Prof Jyrki Kivinen
- Anupam Arohi (MSc 2011)
- Yuan Zou (MSc 2011)
- Teemu Pulkkinen (MSc 2011)
- Toni Merivuori (MSc 2009)
- Lari Latvala (Msc 2009), co-supervised with Prof Jouko Laasasenaho
Students interested in MSc/PhD thesis topics related to information theory, statistical modeling, machine learning, artificial intelligence, and digital humanities are welcome to contact me by e-mail (but see disclaimer below).
Disclaimer: If you currently not enrolled at the University of Helsinki, please do not send me e-mail, but contact the Department of Computer Science for information about the application process. Unfortunately I cannot reply to all e-mail inquiries.
``Your act was unwise,'' I exclaimed ``as you see by the
He solemnly eyed me. ``When choosing the course of my action,''
said he, ``I had not the outcome to guide me.''
I am the leader of the Information, Complexity and Learning (ICL) research group, which is a part of the CoSCo research group lead by Prof Petri Myllymäki. I'm also affiliated with the Academy of Finland funded Centre of Excellence COIN.
Topics of my interest include
- machine learning and big data
- statistics (MDL principle, Bayes),
- information theory,
- digital humanities.
Recent and ongoing work:
- Y. Zou and T. Roos (2016). Sparse logistic regression with logical features,
to appear in Proc. 20th Pacific Asia Conference on Knowledge Discovery and Data Mining
Auckland, New Zealand.
- J. Määttä and T. Roos (2016). Robust sequential
prediction in linear regression with Student's t-distribution, to
appear in Proc. 14th International Symposium on Artificial
Intelligence and Mathematics (ISAIM-2016).
- R. Eggeling, T. Roos, P. Myllymäki, I. Grosse (2015).
Inferring intra-motif dependencies of DNA binding sites from ChIP-seq
data, BMC Bioinformatics 16:375.
- V. Hyvönen, T. Pitkänen, S. Tasoulis,
L. Wang, T. Roos, and J. Corander (2015).
Fast k-NN search, arXiv:1509.06957.
- Y. Zou and T. Roos (2015). On model selection, Bayesian networks,
and the Fisher information integral, to appear in Proc. 2nd
Workshop on Advanced Methodologies for Bayesian Networks
- J. Määttä, D.F. Schmidt, and T. Roos (2015).
Subset selection in linear regression using sequentially normalized least squares: Asymptotic theory, Scandinavian Journal of
- J. Tehrani, Q. Nguyen, and T. Roos, (2015).
Oral fairy tale or literary fake? Investigating the origins of Little
Red Riding Hood using phylogenetic network analysis,
Digital Scholarship in the Humanities.
- Q. Nguyen and T. Roos, (2015).
Likelihood-based inference of phylogenetic networks from sequence data
by PhyloDAG, in
Proc. 2nd International
Conference on Algorithms for Computational Biology
LNBI 9199, Springer, pp. 126–140.
- L. Wang, S. Tasoulis, T. Roos, and J. Kangasharju, (2015).
Kvasir: Seamless integration of latent semantic
analysis-based content provision into web browsing, demonstration
paper in WWW 2015, ACM Press,
- K. Watanabe and T. Roos, (2015).
Achievability of asymptotic minimax regret
by horizon-dependent and horizon-independent strategies,
to appear in JMLR.
- A. Barron, T. Roos, and K. Watanabe, (2014).
Bayesian properties of normalized
maximum likelihood and its fast computation,
in Proc. IEEE International Symposium on Information
IEEE Press, pp. 1667–1671.
- M. Sherman, G. Clark, Y. Yang, S. Sugrim, A. Modig, J. Lindqvist,
A. Oulasvirta, and T. Roos, (2014).
User-generated free-form gestures for authentication: security and memorability,
in Proc. 12th International Conference on Mobile Systems, Applications, and Services (MobiSys-2014), ACM Press, pp. 176–189.
- A. Oulasvirta, T. Roos, A. Modig, and L. Leppänen, (2013).
Information capacity of full-body movements, in
Proc. 2013 ACM SIGCHI Conference on Human Factors in Computing
Systems (CHI-2013), ACM,
Best paper honorable mention award.
- T. Roos and Y. Zou, (2011).
Analysis of textual variation by latent
in Proc. 2011 International Conference on Data Mining (ICDM-2011),
IEEE Press, pp. 567–576.
- A. Carvalho, T. Roos, A. Oliveira, and
P. Myllymäki, (2011). Discriminative learning of Bayesian
networks via factorized conditional log-likelihood,
- J. Rissanen, T. Roos, and P. Myllymäki, (2010).
Model selection by sequentially normalized least squares,
of Multivariate Analysis 101:4, 839–849.
| R code
- T. Roos and T. Heikkilä, (2009). Evaluating methods for computer-assisted stemmatology using artificial benchmark data sets, Literary and Linguistic Computing, 24:4, 417–433, doi:10.1093/llc/fqp002. abstract | data-sets
I was a member of the organizing committee of the 11th Conference of the European Society for Textual Scholarship (ESTS-2014). The conference will be held in Helsinki on Oct 30-Nov 1, 2014.
We organized the 7th Workshop on Information Theoretic Methods in Science and Engineering (WITMSE) in Hawaii on July 5-8, 2014, right after the ISIT symposium. website
In October–December 2013, I was a Fellow at the Finnish Institute in Rome (Villa Lante).
Associated with our CHI-2013 paper, we are lauching a web server for computing the information capacity from your own motion capture data: infocapacity.hiit.fi. Please ask for a beta testing account.
My traveling/conference schedule in 2014:
- Finnish Institute in Rome, March 28–April 8.
- ISIT-2014 and WITMSE-2014, Hawaii, June 29–July 7.
- ESTS-2014, Helsinki, October 30–November 1.
- Royal Society meeting: Evolutionary analysis beyond the gene, Chicheley Hall, UK, 17–18 November.
I was a co-chair of WITMSE-2013 in Tokyo, Japan, August 26–29.
My traveling/conference schedule in 2013:
- University of Cambridge, UK, January 10–12.
- ITA-2013, San Diego, February 10–15.
- CHI-2013, Paris, April 27–May 2.
- WITMSE-2013, Tokyo, August 26–29.
- Finnish Institute in Rome, October 18–December 28.
Our paper "Information capacity of full-body movements" gets a Best Paper Honorable Mention Award at CHI-2013. If you are planning to attend the conference, please visit our fun interactive Kinect-based demo!
Special issue on selected papers from PGM-2010 in the International Journal of Approximate Reasoning (editors Roos, Myllymäki, Jaakkola): link to editorial and articles.
In January–April 2012, I was a Visiting Fellow at the University of Cambridge.
I was an external evaluator at the PhD thesis defense of Thomas Toftkjær at Aarhus University on January 10, 2012.
My traveling/conference schedule in 2012:
- University of Aarhus, Denmark, January 10.
- University of Cambridge, UK, January 16–April 30.
- ITA-2012, San Diego, February 6–10.
- University of Oxford, UK, March 7–8.
- University of East Anglia, UK, March 22–23.
- Durham University, UK, April 2–5.
- WITMSE 2012, Amsterdam, August 26—30.
- University of Bern, Switzerland, November 22–24.
The Academy of Finland Centre of Excellence COIN starts in 1/2012.
The 5th Brazilian Conference on Statistical Modelling in Insurance and Finance was held in Maresias, Brazil, on April 10–15, 2011. I gave a two-day short course on MDL. lecture notes | slides (day1) | slides (day2)
Tuomas Heikkilä, Petri Myllymäki and I organize a series of stemmatology workshops in Helsinki and elsewhere in 2010–2012. web pages
- Studia Stemmatologica IV, University of Cambridge and Microsoft Research, Cambridge, UK, March 21–26.
- BCSMIF-2011 and University of Sao Paulo, Brazil, April 9–17.
- ICANN-2011, Helsinki, June 14–17.
- ISIT-2011, St. Petersburg, Russia, July 31–August 5.
- WITMSE-2011, Helsinki, August 7–10.
- Studia Stemmatologica V, Rome, October 5–8.
- Nonlinear physics (!), Stockholm, October 18–20.
- ICDM-2011, Vancouver, December 11–14.
4/2011: I was conferred the title Adjunct Professor (in Finnish, dosentti) by the Faculty of Science, and appointed as a senior reseacher at HIIT.
I was invited to the senior program committee of UAI-2011.
The Academy of Finland has graciously decided to fund me under a postdoctoral researcher's project.
Petri Myllymäki, Tommi Jaakkola, and I were the program committee co-chairs of the 5th European Workshop on Probabilistic Graphical Models (PGM-2010) in Helsinki, September 13–15, 2010. web pages
My traveling schedule in 2010:
- MIT, Boston, February 8–April 30.
- Columbia University, New York, February 22–23.
- Yale, New Haven, April 1–2.
- Washington University, St. Louis, April 22–23.
- SCAS, Uppsala, Sweden, June 21–23.
- UCLA & UAI-2010, Los Angeles, July 8–11.
- WITMSE-2010, Tampere, Finland, August 16–18.
- Studia Stemmatologica, Pisa, Italy, November 21–24.
I got the ERCIM (European Research Consortium for Informatics and Mathematics) 2009 Cor Baayen Award.
- ITA-2009, San Diego & HP Labs, Palo Alto, February 8–13.
- ITW-2009, Volos, Greece, June 10–12.
- ISIT-2009, Seoul, Korea, June 28–July 3.
- WITMSE-2009, Tampere, Finland, August 17–19.
- ISTI/CNR & Univ. Pisa, Pisa, Italy, November 5–6.
The Finnish Cultural Foundation has awarded a Science Workshop grant (EUR 200,000) on stemmatology for the years 2009–2010. announcement (w/ fanfares) (in Finnish)
As of August 2008, I have been appointed as post-doctoral researcher at HIIT for three years.
During the Fall term 2007 I lectured the Three Concepts: Information course.
I defended my Ph.D. thesis "Statistical and Information-Theoretic Methods for Data Analysis" on June 9, 2007. The opponent was Prof. Alon Orlitsky (UCSD). Pre-examiners were Prof. Ioan Tabus (Tampere UT) and Prof. Tommi Jaakkola (MIT). electronic version (summary part).
I received a Ph.D. degree (in Computer Science) from the University of Helsinki in 2007. I was supported by HeCSE (Helsinki Graduate School in Computer Science and Engineering). My supervisors were Prof. Henry Tirri (on industrial leave), and Prof. Petri Myllymäki. In addition to computer science I have minors in mathematics and philosophy (see a list of finished courses).
am married to the loveliest girl in the world, the light of my life.
''You are the reason I am. You are all my reasons.''
Since July 31st 2003, the universe revolves around a boy. Since March 1st 2007, we have two boys!
Play a game of Rock, Paper, Scissors: rock beats scissors, paper beats rock, and scissors beat paper. Even such a simple game offers some theoretically interesting problems: Can one predict the other player's choice? What is the best strategy against a good opponent? (Yes, the computer could cheat, but I promise it doesn't.) Such questions were considered by Claude Shannon in the 1950s; see a modern variation of his 'Mind-Reading Machine' based on data-compression (CTW).