Department of Computer Science

Complex Systems

Network science, stochastic processes and nonlinear dynamics.
Complex networks, illustration Matti Ahlgren Aalto University

The Complex Systems research area studies diverse systems from social networks to the human brain and from cities to the human immune system, applying the tools of network science, stochastic processes, and nonlinear dynamics.

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Detail from main facade of Computer Science building / Yksityiskohta Tietotekniikan talon julkisivusta / photo Aalto University, Matti Ahlgren

Silja Sormunen and Erik Härkönen received the prestigious School of Science Master’s Thesis Awards

Only about 1% of Aalto School of Science graduates received such an award

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Kuva: NordicMathCovid-hanke.

New epidemic modelling facilitates assessment of corona strategies

Carried out as a joint project involving Finnish, Swedish and Norwegian researchers, the model also takes into account network structures and human mobility.

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Nainen seisoo ja katsoo sivulle hymyillen kädet puuskassa. Hänellä on päällään musta paita ja sininen huivi ja aurinko värjää taustaa vaaleaksi.

Maarit Käpylä turned her childhood hobbies into a living

As a child, Maarit Käpylä was interested in the stars and coding, and now she researches the activity of the sun, which could not be done without computer science

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Kuvituskuva, jossa taustalla kartta ja kännykänmuotoisia symboleja

International group of researchers: Mobile phone data should be utilized more to curb the corona pandemic

These types of data could help to curb the spread of the pandemic and to evaluate the effectiveness of restrictions

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An illustration showing how stars consist of a core, a radiation zone and a convection zone. In giant stars, the convection zone is proportionately much larger.

Turbulent convection at the heart of stellar activity

By combining modern data analysis techniques with stellar structure modelling for main-sequence and giant stars, researchers shed new light on stellar dynamos

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Ali Salloum walking at Laajalahti Nature Reserve in summer, surrounded by green bushes, trees and grass

'Researchers should compete with Netflix, Spotify and YouTube'

According to master's student Ali Salloum, researchers have an obligation to get young people excited about science.

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Silja Sormunen standing on a forest path in Otaniemi

'Mathematics is a bridge between different disciplines'

Psychology, medicine and philosophy are some of the subjects that Silja Sormunen has studied. That is why Complex Systems, part of Life Science Technologies programme, felt like just the thing she had been looking for. She is also in the Doctoral Track programme.

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Latest publications

Characterization of human T cell receptor repertoire data in eight thymus samples and four related blood samples

Nelli Heikkilä, Iivari Kleino, Reetta Vanhanen, Dawit A. Yohannes, Ilkka P. Mattila, Jari Saramäki, T. Petteri Arstila 2021 Data in Brief

Generation of self-reactive, shared T-cell receptor α chains in the human thymus

Nelli Heikkilä, Silja Sormunen, Joonatan Mattila, Taina Härkönen, Mikael Knip, Emmi Leena Ihantola, Tuure Kinnunen, Ilkka P. Mattila, Jari Saramäki, T. Petteri Arstila 2021 JOURNAL OF AUTOIMMUNITY

Navigability assessment of large-scale redesigns in nine public transport networks: Open timetable data approach

Christoffer Weckström, Milos Mladenovic, Rainer Kujala, Jari Saramäki 2021 TRANSPORTATION RESEARCH PART A: POLICY AND PRACTICE

Circadian rhythms in temporal-network connectivity

T. Alakorkko, J. Saramaki 2020 CHAOS

Human thymic T cell repertoire is imprinted with strong convergence to shared sequences

Nelli Heikkilä, Reetta Vanhanen, Dawit A. Yohannes, Iivari Kleino, Ilkka P. Mattila, Jari Saramäki, T. Petteri Arstila 2020 MOLECULAR IMMUNOLOGY

Maximum likelihood estimation for randomized shortest paths with trajectory data

Ilkka Kivimäki, Bram Van Moorter, Manuela Panzacchi, Jari Saramäki, Marco Saerens 2020 Journal of Complex Networks

Mobile phone data for informing public health actions across the COVID-19 pandemic life cycle

Nuria Oliver, Bruno Lepri, Harald Sterly, Renaud Lambiotte, Sébastien Deletaille, Marco De Nadai, Emmanuel Letouzé, Emmanuel Letouzé, Albert Ali Salah, Richard Benjamins, Ciro Cattuto, Vittoria Colizza, Nicolas de Cordes, Samuel P. Fraiberger, Till Koebe, Sune Lehmann, Juan Murillo, Alex Pentland, Phuong N. Pham, Frédéric Pivetta, Jari Saramäki, Samuel V. Scarpino, Michele Tizzoni, Stefaan Verhulst, Patrick Vinck 2020 Science Advances

Tracking the cumulative knowledge spreading in a comprehensive citation network

Pietro della Briotta Parolo, Rainer Kujala, Kimmo Kaski, Mikko Kivela 2020 PHYSICAL REVIEW RESEARCH

Multi-locus interactions and the build-up of reproductive isolation

I. Satokangas, S. H. Martin, H. Helanterä, J. Saramäki, J. Kulmuni 2020 Philosophical transactions of the Royal Society of London. Series B, Biological sciences

Estimating tie strength in social networks using temporal communication data

Javier Urena Carrion, Jari Saramäki, Mikko Kivelä 2020 EPJ Data Science
More information on our research in the Research database.
Research database

Related units

Helsinki Institute for Information Technology HIIT

HIIT is a joint research institute of Aalto University and the University of Helsinki for basic and applied research on information technology.

HIIT

Finnish Center for Artificial Intelligence FCAI

FCAI is a nation-wide competence center for Artificial Intelligence in Finland, initiated by Aalto University, University of Helsinki, and VTT Technical Research Centre of Finland.

FCAI Finnish Center for Artificial Intelligence

Research areas

Research areas in department of computer science

Department of Computer Science
PML Research Group in Department of Computer Science

Department of Computer Science

Modern computer science to foster future science and society.

Artistic depiction of a bright light in space / made by Ray Scipak

School of Science

Science for tomorrow’s technology, innovations and businesses

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