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.

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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.

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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 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

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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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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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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.

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Related research groups

Latest publications

The Russian invasion of Ukraine selectively depolarized the Finnish NATO discussion on Twitter

Yan Xia, Antti Gronow, Arttu Malkamäki, Tuomas Ylä-Anttila, Barbara Keller, Mikko Kivelä 2024 EPJ Data Science

Reticula: A temporal network and hypergraph analysis software package

Arash Badie-Modiri, Mikko Kivelä 2023 SoftwareX

Investor trade allocation patterns in stock markets

Kęstutis Baltakys, Juho Kanniainen, Jari Saramäki, Mikko Kivelä 2023 Journal of Economic Behavior and Organization

Temporal Link Prediction Methods Based on Behavioral Synchrony

Yueran Duan, Qing Guan, Petter Holme, Yacheng Yang, Wei Guan 2023 Temporal Network Theory

Estimating inter-regional mobility during disruption: Comparing and combining different data sources

Sara Heydari, Zhiren Huang, Takayuki Hiraoka, Alejandro Ponce de Leon Chavez, Tapio Ala-Nissila, Lasse Leskelä, Mikko Kivelä, Jari Saramäki 2023 Travel Behaviour and Society

The strength and weakness of disease-induced herd immunity

Takayuki Hiraoka, Abbas K. Rizi, Zahra Ghadiri, Mikko Kivelä, Jari Saramäki 2023 arXiv.org

Networks of climate change: connecting causes and consequences

Petter Holme, Juan C. Rocha 2023 Applied Network Science

Temporal Network Theory

Petter Holme, Jari Saramäki 2023

Universal patterns in egocentric communication networks

Gerardo Iñiguez, Sara Heydari, János Kertész, Jari Saramäki 2023 Nature Communications
More information on our research in the Aalto research portal.
Research portal

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Helsinki Institute for Information Technology HIIT (external link)

Collaborative institute for research on information technology.

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PML research gropu at department of computer science, photo Matti Ahlgren

Research in Computer Science

Research in the Department of Computer Science

Department of Computer Science
Mahine Learning researchers working at Department of Computer Science in Aalto University

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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