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.

Brain & Mind Computational Seminar

Artificial intelligence, neuroscience, human behavior, and digital humanities.

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Banner with an illustration of three happy neurons.
Illustration with the Twitter logo and social networks

Bots were not very active on Twitter during the Finnish municipal elections 

The number of Twitter bots and their influence on the Finnish municipal elections remained low. The final report of ELEBOT project provided new information especially on technical limitations in identifying bots.

Jari Saramäki standing inside the Department of Computer Science.

Professor Jari Saramäki was granted funding from The Strategic Research Council (SRC)

Academy of Finland’s SRC provides funding for long-term research aimed at identifying solutions to major societal challenges.

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

Maarit Korpi-Lagg turned her childhood hobbies into a living

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

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

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.

Illustration of digital pandemic tracing networks

Digital tracing apps should incorporate social connections to mitigate disease outbreaks

Digital tracing models could benefit from a closer look at social connections between app-users.


Related research groups

Latest publications

Quantifying daily rhythms with non-negative matrix factorization applied to mobile phone data

Talayeh Aledavood, Ilkka Kivimäki, Sune Lehmann, Jari Saramäki 2022 Scientific Reports

Directed percolation in temporal networks

Arash Badie Modiri, Abbas K. Rizi, Marton Karsai, Mikko Kivelä 2022 PHYSICAL REVIEW RESEARCH

Directed percolation in random temporal network models with heterogeneities

Arash Badie-Modiri, Abbas K. Rizi, Márton Karsai, Mikko Kivelä 2022 Physical Review E

Travel-related Importation and Exportation Risks of SARS-CoV-2 Omicron Variant in 367 Prefectures (Cities) — China, 2022

Yuan Bai, Mingda Xu, Caifen Liu, Mingwang Shen, Lin Wang, Linwei Tian, Suoyi Tan, Lei Zhang, Petter Holme, Xin Lu, Eric H.Y. Lau, Benjamin J. Cowling, Zhanwei Du 2022 China CDC Weekly


Evgeny Burnaev, Dmitry I. Ignatov, Sergei Ivanov, Michael Khachay, Olessia Koltsova, Andrey Kutuzov, Sergei O. Kuznetsov, Natalia Loukachevitch, Amedeo Napoli, Panos M. Pardalos, Jari Saramäki, Andrey Savchenko, Evgenii Tsymbalov, Elena Tutubalina 2022 Recent Trends in Analysis of Images, Social Networks and Texts

Optimizing COVID-19 surveillance using historical electronic health records of influenza infection

Zhanwei Du, Yuan Bai, Lin Wang, Jose L. Herrera-Diestra, Zhilu Yuan, Renzhong Guo, Benjamin J. Cowling, Lauren A. Meyers, Petter Holme 2022 PNAS Nexus

Peripheral differentiation patterns of human T cells

Nelli Heikkilä, Iivo Hetemäki, Silja Sormunen, Helena Isoniemi, Eliisa Kekäläinen, Jari Saramäki, T. Petteri Arstila 2022 EUROPEAN JOURNAL OF IMMUNOLOGY

Herd immunity and epidemic size in networks with vaccination homophily

Takayuki Hiraoka, Abbas K. Rizi, Mikko Kivelä, Jari Saramäki 2022 Physical Review E

Universality out of order

Petter Holme 2022 Nature Communications

Smart Contract Enabled Decentralized Reputation System for E-Commerce Reviews

Carl Kugblenu, Petri Vuorimaa, Barbara Keller 2022 Internet of Things, Smart Spaces, and Next Generation Networks and Systems - 21st International Conference, NEW2AN 2021, and 14th Conference, ruSMART 2021, Proceedings
More information on our research in the Research database.
Research database

Related units

Helsinki Institute for Information Technology HIIT (external link)

Collaborative institute for research on information technology.


Finnish Center for Artificial Intelligence FCAI (external link)

International research hub for artificial intelligence

Finnish Center for Artificial Intelligence
PML research gropu at department of computer science, photo Matti Ahlgren

Research areas

Research areas in the Department of Computer Science

Department of Computer Science
Aerial photo of Computer Science Building at Aalto University campus

Department of 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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