CV
Education
- Engineering Degree, P. Universidad Católica de Chile, 2009
- M.S. in Applied Mathematics, École Polytechnique, Paris-Saclay University, 2013
- Ph.D. in Applied Mathematics, École Polytechnique, Paris-Saclay University, 2017
Academic Appointments
- 2023-ongoing: CNRS Chair of AI in Social Sciences and Humanities
- CNRS National Institute of Social Sciences and Humanities (Paris, France)
- Researcher at the Complex Systems Institute of Paris (ISC-PIF)
- 2023-ongoing: Associate Researcher and Lecturer
- médialab, Sciences Po (Paris, France)
- 2022-ongoing: Research Fellow
- LPI, University of Paris (Paris, France)
- 2020-2023: Research Scientist
- médialab, Sciences Po (Paris, France)
- 2020: Associate Researcher
- Centre for European Studies and Compared Politics, Sciences Po (Paris, France)
- 2019: Research Consultant
- Organisation for Economic Co-operation and Development, OECD (Paris, France)
- 2017-2019: Postdoctoral Reseach Fellow
- Computer Sciences Department, Sorbonne University (Paris, France)
- Complex Networks Team
- 2013-2017: Doctoral Research Fellow
- Centre de Mathématiques Appliquées (CMAP), École Polytechnique, Université Paris-Saclay (Paris, France)
- 2012-2019: Associate Researcher
2010-2012: R&D Project Manager- INGMAT S.A., R&D Unit-146 of the Corporation for the Promotion of Production (CORFO, Chilean Ministry of Economics)
- 2009-2010: Research Engineer
- Engineering Department, P. Universidad Católica de Chile (Santiago, Chile)
Projects
Publications
Articles in proceedings of peer-reviewed conferences
- Pedro Ramaciotti Morales, Manon Berriche, and Jean-Philippe Cointet (2023).The geometry of misinformation: embedding twitter networks of users who spread fake news in geometrical opinion spaces. In International Conference on Web and Social Media ICWSM. AAAI (accepted, to be publised) [article]
- Pedro Ramaciotti Morales, & Vagena, Z. (2022). Embedding social graphs from multiple national settings in common empirical opinion spaces. In 2022 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining [article]
- Pedro Ramaciotti Morales (2022). Multidimensional online american politics: Mining emergent social cleavages in social graphs. In The 11th International Conference on Complex Networks and their Applications (accepted, to be published) [article]
- Pedro Ramaciotti Morales and Gabriel Muñoz Zolotoochin (2022).Measuring the accuracy of social network ideological embeddings using language models. In International Conference on Information Technology & Sys- tems, pages 267–276. Springer [article]
- Pedro Ramaciotti Morales and Jean-Philippe Cointet (2021). Auditing the effect of social network recom- mendations on polarization in geometrical ideological spaces. In Fifteenth ACM Conference on Recommender Systems, pages 627–632. [article]
- Ramaciotti Morales, P., Jean-Philippe Cointet, and Muñoz Gabriel Zolotoochin (2021). Unfolding the dimensionality structure of social networks in ideological embeddings. In Proceedings of the 2021 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining, pages 333–338.[article]
- Pedro Ramaciotti Morales, Cointet Jean-Philippe, and Julio Laborde (2020). Your most telling friends: Prop- agating latent ideological features on twitter using neighborhood coherence. In 2020 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM 2020). IEEE/ACM [article]
- Pedro Ramaciotti Morales, Lionel Tabourier, and R. Fournier-S’niehotta (2020b). Testing the impact of seman- tics and structure on recommendation accuracy and diversity. In 2020 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM 2020). IEEE/ACM [article]
- Pedro Ramaciotti Morales, Lionel Tabourier, Sylvain Ung, and Christophe Prieur (2019). Role of the website structure in the diversity of browsing behaviors. In Proceedings of the 30th ACM Conference on Hypertext and Social Media, pages 133–142. ACM [article]
- Pedro Ramaciotti, Mario Duran, and Ricardo Hein (2015). Subsurface reflectivity reconstruction schemas for a holographic airborne gpr using surface geometry data. In 2015 8th International Workshop on Advanced Ground Penetrating Radar (IWAGPR), pages 1–4. IEEE[article]
Articles published in peer-reviewed journals
- Ramaciotti Morales, P., Cointet, J. P., Zolotoochin, G. M., Peralta, A. F., Iñiguez, G., & Pournaki, A. (2022). Inferring Attitudinal Spaces in Social Networks. Social Network Analysis and Mining. [article]
- Omer Faruk Metin & Ramaciotti Morales, P. (2022). Tweeting apart: Democratic backsliding, new party cleavage and changing media ownership in Turkey. Party Politics. [article]
- Pedro Ramaciotti Morales, Jean-Philippe Cointet, and Caterina Froio (2022). Posters and protesters: The networked interplay between onsite participation and facebook activity in the yellow vests movement in france. Journal of Computational Social Science, pages 1–29. [article]
- Pedro Ramaciotti Morales, Jean-Philippe Cointet, Bilel Benbouzid, Dominique Cardon, Caterina Froio, Omer Faruk Metin, Benjamin Ooghe, and Guillaume Plique (2021). Atlas multi-plateformes d’un mouvement social: Le cas des gilets jaunes. Statistique et Société, 9(1-2):39–77. [article]
- Jean-Philippe Cointet, Pedro Ramaciotti Morales, Dominique Cardon, Caterina Froio, Andrei Mogoutov, Ben- jamin Ooghe, and Guillaume Plique (2021). De quelle (s) couleur (s) sont les gilets jaunes? plonger des posts facebook dans un espace idéologique latent. Statistique et Société, 9(1-2):79–107. [article]
- Pedro Ramaciotti Morales, Robin Lamarche-Perrin, Raphaël Fournier-S’Niehotta, Rémy Poulain, Lionel Tabourier, and Fabien Tarissan (2021). Measuring diversity in heterogeneous information networks. Theoretical Com- puter Science, 859:80–115. [article]
- Pedro Ramaciotti and Jean-Claude Nédélec (2017). About some boundary integral operators on the unit disk related to the laplace equation. SIAM Journal on Numerical Analysis, 55(4):1892–1914 [article]
- Escarate, P., R. Hein, M. Duran, and P. Ramaciotti. “X-ray fluorescence spectroscopy for accurate copper estimation.” Minerals Engineering 71 (2015): 13-15. [article]
- Pérez-Arancibia, Carlos, Pedro Ramaciotti, Ricardo Hein, and Mario Durán. “Fast multipole boundary element method for the Laplace equation in a locally perturbed half-plane with a Robin boundary condition.” Computer methods in applied mechanics and engineering 233 (2012): 152-163. [article]
Patents
- Toro, Mario Manuel Duran, Ricardo Oliver Hein Hoering, Pedro Ramaciotti Morales, and Pedro Antonio Escárate Monetta. “Method and system for in situ, continuous and real-time analysis of mineral content in drilling debris.” U.S. Patent 9,394,786, issued July 19, 2016. [PatentDocs]
Short articles accepted for peer-reviewed conferences
- Antonio Fernandez Peralta, Pedro Ramaciotti Morales, Janos Kertesz and Gerardo Iñiguez (2022). Empirically grounded opinion models uncover online political polarization in France. Conference on Complex Systems 2022 (CCS22).
- Ramaciotti Morales, Pedro and Cointet, Jean-Philippe (2021). Online Social Movements Dynamics in Ideolog- ical Spaces. 7th International Conference on Computational Social Science (IC2S2 2021). [article]
- Cointet, Jean-Philippe, Cardon, Dominique, Mogoutov,Andrei, Ooghe-Tabanou, Benjamin, Plique, Guillaume and Ramaciotti Morales, Pedro (2021). Uncovering the structure of the French media ecosystem. 7th Interna- tional Conference on Computational Social Science (IC2S2 2021). [article]
- Ramaciotti Morales, Pedro, Benbouzid, Bilel, Gauthier, Emma, Perrier, Alexis. The Effects of Disaggregated Factors of YouTube Recommendations in Diversity. 6th International Conference on Computational Social Science (IC2S2 2020). [article]
Tech-reports
- Bilel Benbouzid, Pedro Ramaciotti Morales, and Emma Gauthier. Cartographier la sphère médiatique et politique sur YouTube en France. Service d’Information du Gouvernement, France. December 2019.
- Ramaciotti Morales, Pedro and Sedunova, Alisa. “Hierarchical graph-segmentation of geo- metries for a linear- complexity solver for electromagnetic heating.” Centre de Mathématiques Appliquées (CMAP), École Polytechnique, Université Paris-Saclay, 2013. [report]
- Pedro Ramaciotti Morales. “Characterization of the electromagnetic response of gpr systems using boundary integral equations and boundary elements methods”. Engineering Department, P. Universidad Católica de Chile, 2009. Project Anillo ADI-30 CONICYT, Chilean National Commission for Scientific and Technological Research. [report]
Theses
- Ramaciotti Morales, Pedro. “Theoretical and numerical aspects of wave propagation phenomena in complex domains and applications to remote sensing .” Doctoral Thesis, 2016. Centre de Mathématiques Appliquées (CMAP). École Polytechnique, Université Paris-Saclay. Advisor: Jean-Claude Nédélec. [thesis] [HAL site]
- Ramaciotti Morales, Pedro. “On The Hierarchical Matrices, Cross-Approximations, And Other Graph-Based Fast Methods For Linear Algorithmic and Memory Complexity For The Boundary Elements Method.” Master’s Thesis, 2013. Centre de Mathématiques Appliquées (CMAP). École Polytechnique, Université Paris-Saclay. Advisor: Jean-Claude Nédélec. [thesis]
Talks
A real scale validator for a high resolution 3D imaging GPR using geometrical surface reconstruction
Conference talk at Progress in Electromagnetic Research Conference, Stockholm, Sweden
Subsurface reflectivity reconstruction schemas for a holographic airborne GPR using surface geometry data.
Conference talk at 8th IEEE International Workshop on Advanced Ground Penetrating Radar (IWAGPR), Florence, Italy
Measuring the Diversity of Shared News and the Effect of Recommendation Algorithms
Conference talk at 1st Conference on Opinion Dynamics and Cultural Conflict in European Space, Leipzig, Germany
Role of the Website Structure in the Diversity of Browsing Behaviors
Conference talk at The Hypertext Conference 2019, Hof, Germany
The algorithmic determinants of behaviour
Talk at AgroParisTech, Paris, France
What do Gilets Jaunes talk about on Facebook?
Conference talk at INSNA Sunbelt Conference, Paris, France
The Effects of Disaggregated Factors of YouTube Recommendations in Diversity
Conference talk at 6th International Conference on Computational Social Science IC2S2, Boston, Cambridge
Your most telling friends: Propagating latent ideological features on Twitter using neighborhood coherence
Conference talk at The 2020 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM), The Hague, Netherlands
Testing the Impact of Semantics and Structure on Recommendation Accuracy and Diversity
Conference talk at The 2020 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM), The Hague, Netherlands
Embedding Informational Ecosystems in Ideological Spaces and Tracking Group Dynamics
Conference talk at 2nd Conference on Opinion Dynamics and Cultural Conflict in European Space, Leipzig, Germany
Online Social Movements Dynamics in Ideological Spaces
Conference talk at 7th International Conference on Computational Social Sciences (IC2S2), Zurich, Switzerland
Auditing the Effect of Social Network Recommendations on Polarization in Geometrical Ideological Spaces
Conference talk at RecSys ’21: 15th ACM Conference on Recommender Systems, Amsterdam, Netherlands
Unfolding the dimensionality structure of social networks in ideological embeddings
Conference talk at The 2021 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM), The Hague, Netherlands
Measuring the accuracy of social network ideological embeddings using language models
Conference talk at International Conference on Information Technology & Systems (ICITS), San José, Costa Rica
Fake news diffusion in geometrical attitudinal spaces
Conference talk at 8th International Conference on Computational Social Sciences (IC2S2), Chicago, USA
Text-free multi-issue attitude mining from social network graph data
Conference talk at 8th International Conference on Computational Social Sciences (IC2S2), Chicago, USA
Social media opinion observatories
Invited talk at Social Data Science CIVICA Days, Florence, Italy
Multidimensional online american politics: Mining emergent social cleavages in social graphs
Conference at Complex Networks and Applications, Palermo, Italy
Embedding social graphs from multiple national settings in common empirical opinion spaces
Conference at Advanced Social Network Analysis and Mining, Instambul, Italy
Inferring attitudinal spaces in social networks
Conference at Massive Data Institute, Washington DC, US
Misinformation in online multidimensional polarization settings
Invited talk at Technology, Democracy, and Cognition Group (TeDCog), University of Bristol, Bristol, UK
Approches structurelles et politiques des circuits informationnelles des mouvements sociaux en ligne
Invited talk at Compiègne Technical University, Compiègne, France
The geometry of misinformation: embedding twitter networks of users who spread fake news in geometrical opinion spaces
Invited talk at CIVICA University, Milan, Berlin, Bucharest
Extreme swingers: explaining political preference change from far-left to far-right in Twitter users
Conference at International Conference on Computational Social Sciences, Copenhaghen, Denmark
The fight against misinformation and fostering healthy informational ecosystems online
Invited talk at Fondation Universitaire, Brussels, Belgium
Artificial Intelligence, social sciences, and the humanities
Invited talk at Journée de prospective de l'Institut National de Sciences Humaines et Sociales, Paris, France
What data are needed to measure and monitor systemic risks linked to political segregation and misinformation in social media under the DSA?
Invited talk at French Regulatory Authority for Audiovisual and Digital Communication (Arcom), Paris, France