Co-Evolving City Life

Transhistorical Urban Landscape as Hypermap

Author(s): Dario Negueruela del Castillo; Iacopo Neri; Paul Guhennec; Javier Argota Sánchez-Vaquerizo; Ludovica Schaerf; Valentine Bernasconi; Pepe Ballesteros Zapata
Published in: HT '23: Proceedings of the 34th ACM Conference on Hypertext and Social Media, Issue 2, 2023
Publisher: 34th ACM Conference on Hypertext and Social Media (HT ’23)
DOI: 10.1145/3603163.3609083

Democratizing Urban Mobility Through an Open-Source, Multi-Criteria Route Recommendation System

Author(s): Alexander Eggerth, Javier Argota Sánchez-Vaquerizo, Dirk Helbing, Sachit Mahajan
Published in: 18th ACM Conference on Recommender Systems, 2024, Page(s) 1073-1078
Publisher: ACM
DOI: 10.1145/3640457.3691702

Collective privacy recovery: Data-sharing coordination via decentralized artificial intelligence

Author(s): Evangelos Pournaras; Mark Christopher Ballandies; Stefano Bennati; Chien-fei Chen
Published in: PNAS Nexus, 3 (2), Issue 4, 2024, ISSN 0027-8424
Publisher: National Academy of Sciences
DOI: 10.1093/pnasnexus/pgae029

Translating citizen-generated air quality data into evidence for shaping policy

Author(s): Mahajan, S., Chung, M. K., Martinez, J., Olaya, Y., Helbing, D., & Chen, L. J.
Published in: Humanities and Social Sciences Communications, 2022, ISSN 2662-9992
Publisher: Nature
DOI: 10.1057/s41599-022-01135-2

Experiments as Code and its application to VR studies in human-building interaction

Author(s): Leonel Aguilar, Michal Gath-Morad, Jascha Grübel, Jasper Ermatinger, Hantao Zhao, Stefan Wehrli, Robert W. Sumner, Ce Zhang, Dirk Helbing & Christoph Hölscher
Published in: Scientific Reports, 2024, ISSN 2045-2322
Publisher: Nature Publishing Group
DOI: 10.1038/s41598-024-60791-3

Getting Real: The Challenge of Building and Validating a Large-Scale Digital Twin of Barcelona’s Traffic with Empirical Data

Author(s): Javier Argota Sánchez-Vaquerizo
Published in: ISPRS International Journal of Geo-Information; Volume 11; Issue 1; Pages: 24, Issue 1, 2022, ISSN 2220-9964
Publisher: MDPI
DOI: 10.3390/ijgi11010024

Democratizing air: A co-created citizen science approach to indoor air quality monitoring

Author(s): Sachit Mahajan, Rosy Mondardini, Dirk Helbing
Published in: Sustainable Cities and Society, Issue 116, 2024, Page(s) 105890, ISSN 2210-6707
Publisher: Elsevier BV
DOI: 10.1016/j.scs.2024.105890

How networks shape diversity for better or worse

Author(s): Musso, Andrea; Helbing, Dirk
Published in: Royal Society Open Science, Issue 2, 2024, ISSN 2054-5703
Publisher: London: Royal Society Publishing
DOI: 10.1098/rsos.230505

greenR: An open-source framework for quantifying urban greenness

Author(s): Sachit Mahajan
Published in: Ecological Indicators, 2024, ISSN 1470-160X
Publisher: Elsevier BV
DOI: 10.1016/j.ecolind.2024.112108

Co-creating the future: participatory cities and digital governance

Author(s): Dirk Helbing, Sachit Mahajan, Dino Carpentras, Monica Menendez, Evangelos Pournaras, Stefan Thurner, Trivik Verma, Elsa Arcaute, Michael Batty, Luis M. A. Bettencourt
Published in: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Issue 382, 2024, ISSN 1364-503X
Publisher: Royal Society of London
DOI: 10.1098/rsta.2024.0113

Participatory resilience: Surviving, recovering and improving together

Author(s): Sachit Mahajan; Carina I. Hausladen; Javier Argota Sánchez-Vaquerizo; Marcin Korecki; Dirk Helbing
Published in: Sustainable Cities and Society, 83, Issue 1, 2022, ISSN 2210-6707
Publisher: Elsevier BV
DOI: 10.3929/ethz-b-000553187

Ethics of smart cities and smart societies

Author(s): Andrej Zwitter, Dirk Helbing
Published in: Ethics and Information Technology, Issue 26, 2024, ISSN 1388-1957
Publisher: Kluwer Academic Publishers
DOI: 10.1007/s10676-024-09803-4

Analytically Guided Reinforcement Learning for Green It and Fluent Traffic

Author(s): Korecki, Marcin; Helbing, Dirk
Published in: IEEE Access, 10, Issue 1, 2022, ISSN 2169-3536
Publisher: Institute of Electrical and Electronics Engineers Inc.
DOI: 10.1109/access.2022.3204057

Dynamic calibration of low-cost PM2.5 sensors using trust-based consensus mechanisms

Author(s): Sachit Mahajan, Dirk Helbing
Published in: npj Climate and Atmospheric Science, Issue 8, 2025, ISSN 2397-3722
Publisher: Springer Science and Business Media LLC
DOI: 10.1038/s41612-025-01145-2

The hidden problem in Big Data: even infinite information does not guarantee consistent measurement

Author(s): Dino Carpentras, Philip Warncke
Published in: Society Register, Issue 8, 2024, Page(s) 7-30, ISSN 2544-5502
Publisher: Adam Mickiewicz University Poznan
DOI: 10.14746/sr.2024.8.4.01

We urgently need a culture of multi-operationalization in psychological research

Author(s): Dino Carpentras
Published in: Communications Psychology, Issue 2, 2024, ISSN 2731-9121
Publisher: Springer Science and Business Media LLC
DOI: 10.1038/s44271-024-00084-7

Adaptability and sustainability of machine learning approaches to traffic signal control

Author(s): Marcin Korecki
Published in: Scientific Reports, Issue 20452322, 2022, ISSN 2045-2322
Publisher: Nature Publishing Group
DOI: 10.1038/s41598-022-21125-3

Smart Cities and Access to Nature: A Framework for Evaluating Green Recreation Space Accessibility

Author(s): Jenny Martinez; Sachit Mahajan
Published in: IEEE Access, Vol 11, Pp 102014-102024 (2023), Issue 11, 2023, ISSN 2169-3536
Publisher: Institute of Electrical and Electronics Engineers Inc.
DOI: 10.1109/access.2023.3303571

Data Marketplaces: A Solution for Personal Data Control and Ownership?

Author(s): Sachit Mahajan
Published in: Sustainability, 14 (24), Issue 1, 2022, ISSN 2071-1050
Publisher: MDPI Open Access Publishing
DOI: 10.3390/su142416884

Empowering minorities and everyone in participatory budgeting: an agent-based modelling perspective

Author(s): Dino Carpentras, Regula Hänggli Fricker, Dirk Helbing
Published in: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Issue 382, 2024, ISSN 1364-503X
Publisher: Royal Society of London
DOI: 10.1098/rsta.2024.0090

Navigating the cohesion-diversity trade-off: understanding the role of facilitators in co-creation using agent-based modelling

Author(s): Sachit Mahajan
Published in: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Issue 382, 2024, ISSN 1364-503X
Publisher: Royal Society of London
DOI: 10.1098/rsta.2024.0093

Spatial econometrics to estimate traffic reduction by transforming office space into housing and other land uses: The case for Barcelona

Author(s): Javier Argota Sánchez-Vaquerizo, Dirk Helbing
Published in: Cities, Issue 162, 2025, Page(s) 105901, ISSN 0264-2751
Publisher: Pergamon Press Ltd.
DOI: 10.1016/j.cities.2025.105901

Overcoming the Price of Anarchy by Steering with Recommendations

Author(s): Cesare Carissimo, Marcin Korecki, Damian Dailisan
Published in: Neurocomputing, Issue 639, 2025, Page(s) 129993, ISSN 0925-2312
Publisher: Elsevier BV
DOI: 10.1016/j.neucom.2025.129993

Urban Digital Twins and metaverses towards city multiplicities: uniting or dividing urban experiences?

Author(s): Javier Argota Sánchez-Vaquerizo
Published in: Ethics and Information Technology, Issue 27, 2025, ISSN 1388-1957
Publisher: Kluwer Academic Publishers
DOI: 10.1007/s10676-024-09812-3

Human digital twins unlocking Society 5.0? Approaches, emerging risks and disruptions

Author(s): Catarina Fontes, Dino Carpentras, Sachit Mahajan
Published in: Ethics and Information Technology, Issue 26, 2024, ISSN 1388-1957
Publisher: Kluwer Academic Publishers
DOI: 10.1007/s10676-024-09787-1

Deep Reinforcement Meta-Learning and Self-Organization in Complex Systems: Applications to Traffic Signal Control

Author(s): Marcin Korecki
Published in: Entropy, 25 (7), Issue 5, 2023, ISSN 1099-4300
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/e25070982

Design and development of an open-source framework for citizen-centric environmental monitoring and data analysis

Author(s): Sachit Mahajan
Published in: Scientific Reports, 2022, ISSN 2045-2322
Publisher: Nature Publishing Group
DOI: 10.1038/s41598-022-18700-z

Democratizing Traffic Control in Smart Cities

Author(s): Marcin Korecki; Damian Dailisan; Joshua Yang; Dirk Helbing
Published in: Transportation Research Part C: Emerging Technologies, 160, Issue 5, 2024, ISSN 0968-090X
Publisher: Pergamon Press Ltd.
DOI: 10.2139/ssrn.4598461

Less can be more: Pruning street networks for sustainable city-making

Author(s): Argota Sánchez-Vaquerizo, Javier; Helbing, Dirk
Published in: Transportation Research Interdisciplinary Perspectives, 21, Issue 3, 2023, ISSN 2590-1982
Publisher: Elsevier Ltd.
DOI: 10.1016/j.trip.2023.100878

Vayu: An Open-Source Toolbox for Visualization and Analysis of Crowd-Sourced Sensor Data.

Author(s): Sachit Mahajan
Published in: Sensors, Vol 21, Iss 7726, p 7726 (2021), Issue 1, 2021, ISSN 1424-8220
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/s21227726

Limits of optimization

Author(s): Cesare Carissimo, Marcin Korecki
Published in: Minds and Machines, 2023, ISSN 0924-6495
Publisher: Kluwer Academic Publishers
DOI: 10.1007/s11023-023-09633-1

Mapping Moral Reasoning in LLMs: A Multi-Dimensional Analysis of Safety Principle Conflicts

Author(s): Sachit Mahajan
Published in: Proceedings of the AAAI/ACM Conference on AI, Ethics, and Society, Issue 8, 2025, Page(s) 1674-1685, ISSN 3065-8365
Publisher: Association for the Advancement of Artificial Intelligence (AAAI)
DOI: 10.1609/aies.v8i2.36665

Ethics of Smart Cities: Towards Value-Sensitive Design and Co-Evolving City Life

Author(s): Helbing, Dirk, Farzam Fanitabasi, Fosca Giannotti, Regula Hänggli, Carina I. Hausladen, Jeroen van den Hoven, Sachit Mahajan, Dino Pedreschi, and Evangelos Pournaras
Published in: Sustainability, 2021, ISSN 2071-1050
Publisher: MDPI Open Access Publishing
DOI: 10.3390/su132011162

A virtual reality experiment to study pedestrian perception of future street scenarios

Author(s): Javier Argota Sánchez-Vaquerizo, Carina I. Hausladen, Sachit Mahajan, Marc Matter, Michael Siebenmann, Michael A. B. van Eggermond & Dirk Helbing
Published in: Scientific Reports, 2024, ISSN 2045-2322
Publisher: Nature Publishing Group
DOI: 10.1038/s41598-024-55073-x

Outline of Experimental and Behavioral Research for the CoCi Project

Author(s): Prof. Dirk Helbing COSS ETHZ Dr. Carina I. Hausladen COSS ETHZ Dr. Sachit Mahajan COSS ETHZ M.Sc. Thomas Asikis COSS ETHZ M.Sc. Marcin Korecki COSS ETHZ M.Sc. Javier Argota Sanchez-Vaquerizo, COSS, ETHZ
Published in: 2021
Publisher: Unpublished Manuscript

Self-organization in Pedestrian and Traffic Systems and Logistics

Author(s): Hausladen Carina I., Mahajan Sachit, Argota Sanchez-Vaquerizo Javier, Korecki Marcin, Helbing Dirk
Published in: 2022
Publisher: ETH Zurich Continuing Education

Breaking the Code: Multi-level Learning in the Eurovision Song Contest

Author(s): Luís A. Nunes Amaral, Arthur Capozzi, Dirk Helbing
Published in: 2025
Publisher: Arxiv

Not Your Mean Green: Beyond Averages in Mapping Socio-Spatial Inequities in Urban Greenery for Smart Cities

Author(s): Jenny Rocio Rios Martinez, Javier Argota Sánchez-Vaquerizo, Sachit Mahajan
Published in: 2025
Publisher: Research Gate

Co-Designing AI Systems with Value-Sensitive Citizen Science

Author(s): Sachit Mahajan, Dirk Helbing
Published in: 2025
Publisher: Elsevier BV
DOI: 10.2139/ssrn.5217120

Large cities lose their growth advantage as urban systems mature

Author(s): Andrea Musso, Diego Rybski, Dirk Helbing, Frank Neffke
Published in: 2025
Publisher: Arxiv
DOI: 10.48550/arxiv.2510.12417

AI Strengthening Democratic Engagement: Exploring Existing Digital Tools for Public Participation and Future Directions

Author(s): Catarina Fontes, Sachit Mahajan
Published in: 2025
Publisher: Research Gate

Repairing, Reviving, and Upgrading Democracies in the Age of AI

Author(s): Dirk Helbing, Sachit Mahajan
Published in: 2025
Publisher: Research Gate

Revisiting Big Data Optimism: Risks of Data-Driven Black Box Algorithms for Society

Author(s): Sachit Mahajan, Dirk Helbing
Published in: 2025
Publisher: Research Gate

Next Civilization

Author(s): Helbing, Dirk
Published in: isbn: 978-3-030-62329-6, Issue 1, 2021
Publisher: Springer

The Grand Challenge of Helping People Agree and How We Might Go About Collectively Tackling It

Author(s): Bruce Edmonds, Dino Carpentras, Edmund Chattoe-Brown
Published in: Springer Proceedings in Complexity, Advances in Social Simulation, 2024, Page(s) 463-472
Publisher: Springer Nature Switzerland
DOI: 10.1007/978-3-031-57785-7_35

Socio-Economic Implications of the Digital Revolution

Author(s): Dirk Helbing, Carina I. Hausladen
Published in: Handbook of Complexity Economics, 2022
Publisher: Routledge

A Tale of Three Cities: On Digital Twins

Author(s): Argota Sánchez-Vaquerizo, Javier; id_orcid0000-0001-9389-6616; Zurera Gómez, Adriana
Published in: Future Cities - City Futures: Emerging Urban Perspectives, Issue 4, 2023
Publisher: TU Delft Open Books
DOI: 10.3929/ethz-b-000635736

Digital Twins: Potentials, Ethical Issues, and Limitations

Author(s): Dirk Helbing; Javier Argota Sánchez-Vaquerizo
Published in: Handbook on the Politics and Governance of Big Data and Artificial Intelligence ISBN: 9781800887374, Issue 2, 2023
Publisher: Elgar online
DOI: 10.2139/ssrn.4167963

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