Research output per year
Research output per year
Personal profile
Artistic and research interests
I study complex systems and in particular complex networks, from social networks that we humans form to genetic relationships in populations, and from the structure and function of the human brain to man-made systems such as public transport networks.
If you want to know why networks are the thing, please click here!
Expertise related to UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):
Education/Academic qualification
Doctoral degree, Engineering and Technology, Helsinki University of Technology
Award Date: 15 Dec 1998
Master's degree, Engineering and Technology, Helsinki University of Technology
Award Date: 6 Jun 1995
Keywords
- Complex systems
- Complex networks
- Social networks
- Computational science
- Network neuroscience
Fingerprint
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Collaborations and top research areas from the last five years
Recent external collaboration on country/territory level. Dive into details by clicking on the dots or
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Close and more distant relatives are associated with child mortality risk in historical Finland
Lahdenperä, M., Salonen, M., Hiraoka, T., Seltmann, M. W., Saramäki, J. & Lummaa, V., 20 Jan 2025, In: Evolutionary Human Sciences. 7, p. 1-18 18 p., e5.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile1 Citation (Scopus)26 Downloads (Pure) -
Strength and weakness of disease-induced herd immunity in networks
Hiraoka, T., Ghadiri, Z., Rizi, A. K., Kivelä, M. & Saramäki, J., 15 Jul 2025, In: Proceedings of the National Academy of Sciences of the United States of America. 122, 28, p. 1-11 11 p., e2421460122.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile1 Citation (Scopus)7 Downloads (Pure) -
Temporal networks of social interactions
Saramäki, J. & Holme, P., 11 Dec 2025, Handbook of Computational Social Science . Yasseri, T. (ed.). Edward Elgar, p. 173–188Research output: Chapter in Book/Report/Conference proceeding › Chapter › Scientific › peer-review
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Critical delay accumulation
Saramäki, J., Aug 2024, In: Nature Physics. 20, 8, p. 1228-1229 2 p.Research output: Contribution to journal › Comment/debate › Scientific › peer-review
1 Citation (Scopus) -
Disentangling degree and tie strength heterogeneity in egocentric social networks
Heydari, S., Iñiguez, G., Kertész, J. & Saramäki, J., 18 Dec 2024, In: EPJ Data Science. 13, 1, p. 1-16 16 p., 76.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile1 Citation (Scopus)19 Downloads (Pure)
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STN NetResilience Saramäki jatko: NetResilience 2. jakso
Saramäki, J. (Principal investigator), Huang, Z. (Project Member) & Hiraoka, T. (Project Member)
01/10/2024 → 30/09/2027
Project: RCF SRC (STN)
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PV uhkamalli: Epidemiologinen uhkamalli
Saramäki, J. (Principal investigator) & Leisma, A. (Project Member)
01/05/2025 → 31/10/2025
Project: Unknown
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STN NetResilience Saramäki: Social networks, fertility and wellbeing in rapidly ageing Finland: Building population resilience
Saramäki, J. (Principal investigator), Heydari, S. (Project Member), Hiraoka, T. (Project Member) & Huang, Z. (Project Member)
01/10/2021 → 30/09/2024
Project: RCF SRC (STN)
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HumExp/Saramäki
Saramäki, J. (Principal investigator) & Triana Hoyos, A. (Project Member)
01/01/2018 → 31/12/2019
Project: Business Finland: Other research funding
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Digital Daily Rhythms
Saramäki, J. (Principal investigator), Hiraoka, T. (Project Member), Triana Hoyos, A. (Project Member), Hakala, A. (Project Member), Alakörkkö, T. (Project Member), Aledavood, T. (Project Member), Urena Carrion, J. (Project Member) & Heydari, S. (Project Member)
01/09/2016 → 31/08/2020
Project: Academy of Finland: Other research funding
Datasets
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A collection of public transport network data sets for 27 cities
Kujala, R. (Creator), Darst, R. (Creator), Weckström, J. (Creator), Mladenovic, M. (Supervisor) & Saramäki, J. (Supervisor), Zenodo, 29 Dec 2017
DOI: 10.5281/zenodo.1133858, https://zenodo.org/record/1133858
Dataset
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Data from: Genetic structure of native ant supercolonies varies in space and time
Schultner, E. (Contributor), Saramäki, J. (Creator) & Helanterä, H. (Contributor), Dryad Digital Repository, 9 Nov 2016
DOI: 10.5061/dryad.c682f, https://datadryad.org/resource/doi:10.5061/dryad.c682f and one more link, https://doi.org/10.5061/dryad.c682f/1 (show fewer)
Dataset
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Estimation and monitoring of city-to-city travel times using call detail records
Kujala, R. (Contributor), Aledavood, T. (Contributor) & Saramäki, J. (Creator), figshare, 1 Jan 2016
DOI: 10.6084/m9.figshare.c.3697897.v1, https://figshare.com/collections/Estimation_and_monitoring_of_city-to-city_travel_times_using_call_detail_records/3697897/1
Dataset
Activities
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Networks in Time and Space
Saramäki, J. (Speaker)
4 Jun 2025Activity: Talk or presentation types › Academic keynote or plenary lecture
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DAGshop - a Workshop on Directed Acyclic Graphs
Saramäki, J. (Member)
2 Jun 2025Activity: Participating in or organising an event types › Organization of a workshop, panel, session, tutorial or event
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Temporal Networks of Human Interaction
Saramäki, J. (Speaker)
5 Jun 2025Activity: Talk or presentation types › Invited academic talk
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Temporal Networks of Human Interaction
Saramäki, J. (Speaker)
1 Dec 2025Activity: Talk or presentation types › Invited academic talk
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Evaluation of a Principal Investigator Project application for the Austrian Science Fund (FWF)
Saramäki, J. (Examiner)
24 May 2024Activity: Academic assessments › Evaluation of funding applications
Press/Media
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Uutta tietoa seuraavan pandemian varalle: laumaimmuniteetti ei jakaudu tasaisesti
31/07/2025
1 item of Media coverage
Press/Media: Media appearance
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GLOBAL ROUND UP SECTOR WEEKLY: UNIVERSITY NEWSLETTER OF WEEK-ENDED NOV 19, 2023
Peltokorpi, A., Niemelä, I., Saramäki, J., Ilmoniemi, R., Seppänen, O., Vicente-Saez, R., Ojanperä, T. & Zevenhoven, K.
20/11/2023
1 item of Media coverage
Press/Media: Media appearance
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Findings from Aalto University in the Area of Information Technology Reported (Estimating Inter-regional Mobility During Disruption: Comparing and Combining Different Data Sources)
Leskelä, L., Ala-Nissila, T., Saramäki, J., Hiraoka, T. & Huang, Z.
04/04/2023
1 item of Media coverage
Press/Media: Media appearance
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Kansainvälinen tutkijaryhmä: Kännykkädataa hyödynnettävä ja pysyvää yhteistyötä rakennettava – "Koska tämä ei ole viimeinen pandemia"
27/04/2020
1 item of Media coverage
Press/Media: Media appearance
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Professori varoittaa: Korona saavuttanut Suomessa seuraavan vaiheen
10/03/2020
1 item of Media coverage
Press/Media: Media appearance