Network map of Bluesky users flowingdata.com/2026/02/11/n...

Another new preprint on group adaptation! 📣 Great joint work w/ @martonkarsai.bsky.social and @alainbarrat.bsky.social! Can adaptive behaviors driven by group interactions be more effective and less costly than pairwise ones? How do their adaptive mechanisms differ? arxiv.org/abs/2602.05915 🧵 1/7

Finally, our paper is published in Physical Review E! Surprisingly, the anomalous network-dependent properties observed in ordinary percolation are washed out by the shortest-path-percolation process! An updated arXiv preprint will be available soon as well. 🔗: journals.aps.org/pre/abstract...

🏙️ The #Economics of #Architecture @ahlfeldt.bsky.social, Elisabetta Pietrostefani & Ailin Zhang bring architectural quality into urban & welfare economics, documenting spillovers, heterogeneous preferences & a coordination problem in design investment. 👇 berlinschoolofeconomics.de/insight/the-...

And out today ! journals.aps.org/pre/abstract...

Public service announcement: this @firefox.com extension seems to work as intended: addons.mozilla.org/en-US/firefo... If anyone knows of a similar workaround for google search on android, please let me know.

Just published in Nature Cities, a study led by recent CASA PhD graduate Andrew Renninger advances our understanding of urban inequality by focusing on experienced socioeconomic segregation, or daily encounters between individuals of differing socio-economic groups. www.nature.com/articles/s44...

CASA staff Philyoung Jeong and Dr Duncan Smith have published a new working paper on accessibility to cycle routes in London, examining new cycling indicators for tracking cycle network development, gaps in the network and challenges faced by vulnerable cyclists. discovery.ucl.ac.uk/id/eprint/10...

Thrilled to share my latest paper arxiv.org/abs/2512.046..., accepted at PRE! It challenges a critical assumption from network science : that networks are built bottom-up from nodes. In many spatially embedded networks, this is simply not true : networks are built upon lines and nodes only happen...

In our latest paper, with colleagues from the World Bank, we quantified how urban form shapes water access. Compact city growth could deliver piped water to 220 million more people and sewage services to 190 million more people in Africa, Asia, and Latin America. 💧🏙️ www.nature.com/articles/s44...

Recurrent visitations expose the paradox of human mobility in the 15-Minute City vision arxiv.org/abs/2509.00919

CASA research in @nytimes.com: Ollie Ballinger built software to track naval vessels via open-source satellite data, revealing patterns in Caribbean maritime activity. Read the full story: www.nytimes.com/2025/11/21/w...

Large cities are often assumed to be more violent, but our review shows there’s nothing universal about urban violence. In our new study, @ronaldomenezes.bsky.social and I show that isolated cities tend to experience higher rates of violence against civilians. www.nature.com/articles/s41...

This level of blatant dishonesty baffles me. I'm seeing this more and more. Do people *want* to ruin their reputation?

www.bbc.co.uk/weather/arti... www.lavoixdunord.fr/1645503/arti...

Great read journals.aps.org/rmp/abstract... (I also recommend the quick lecture as a teaser youtu.be/7WsMEL3Q0RI?...)

Metros reduce car use in European cities but trams do not https://arxiv.org/abs/2511.08280

We wrote the Strain on scientific publishing to highlight the problems of time & trust. With a fantastic group of co-authors, we present The Drain of Scientific Publishing: a 🧵 1/n Drain: arxiv.org/abs/2511.04820 Strain: direct.mit.edu/qss/article/... Oligopoly: direct.mit.edu/qss/article/...

How can we reform science? I have some ideas. But I am not sure you’ll like them, because they don’t promise much. elevanth.org/blog/2025/07...

Our work on the dynamics of urban expansion just got published in the Physical Review Letters ! journals.aps.org/prl/abstract...

"In the 1940s, when the French mathematician Jacques Hadamard asked good mathematicians how they came up with solutions to hard problems, they nearly universally answered that they didn’t think in words; neither did they think in images or equations" www.henrikkarlsson.xyz/p/wordless-t...

Principled Model Selection for Stochastic Dynamics link.aps.org/doi/10.1103/...

Modeling the spatial growth of cities https://arxiv.org/abs/2510.03045

Universal Model of Urban Street Networks https://arxiv.org/abs/2509.21931

Strikingly, the shortest-path percolation homogenizes scale-free networks before the phase transition, resulting in the same universality class as the Erdős–Rényi Networks! Check out our new preprint on arXiv: arxiv.org/abs/2509.09142

From lines to networks https://arxiv.org/abs/2509.07951

Looks more complicated than it is. In our recent study journals.plos.org/plosone/arti... we search for an optimum city size, minimizing both urban carbon emissions and urban heat island (constraint: fundamental allometry). It turns out that given the known UHI parameters such optimum does not exist.

Wide coverage of social media and disinformation analysis yesterday from our lab at the @css-conference.bsky.social, with four talks presenting our works associate to the European projects #AI4TRUST #AICODE_EU #HATEDEMICS

Also seen yesterday at @css-conference.bsky.social a work on reinforcement learning applied to ants behaviour by Alessio Pitteri, our study of the historical evolution of EU projects by @verorsanigo.bsky.social and the study on Coordinated Behavior by @elisamurators.bsky.social #CCS2025

New pre-print out ! Work led by @eleandre.bsky.social, in collaboration with M. Napolitano and @ricgallotti.bsky.social. Using Foursquare data from Bologna, we find that the distribution of POIs follows a clear power-law pattern at the city scale. To explain this, we introduce a framework where ...

Scale-free Points-of-Interest Distribution in a City Emerging from Homogeneous Poissonian-point Processes https://arxiv.org/abs/2509.01699

Yesterday was our first day at @css-conference.bsky.social in Siena 🇮🇹. We presented on Telegram data collection @elisamurators.bsky.social , city growth @ulyssemarquis.bsky.social and urban traffic (Alberto Amaduzzi). Excited for 5 more talks today! #CCS2025

Very interesting study on social contagion applied in a historical context by @szapperi.bsky.social and collaborators. Powerful example of where good historical data can lead us in the future. www.nature.com/articles/s41...

Pour ce que ça vaut, je recopie ci-dessous un fil que j'ai posté sur Twitter en 2022, où je tente de raconter les bases fondamentales de la thermodynamique à tout le monde, d'une manière que j'espère pédagogique. 🧵⤵️ •1/24

Opinion dynamics: Statistical physics and beyond arxiv.org/abs/2507.11521

Geometric Criticality in Scale-Invariant Networks https://arxiv.org/abs/2507.11348

When dialects collide: how socioeconomic mixing affects language use epjdatascience.springeropen.com/articles/10....

So excited to see this come together! 🎉 Our latest study explores the interplay between science and misinformation in public debates during COVID-19 🔍 arxiv.org/abs/2507.01481 👇Take a look

Phys. Rep.: Introduction to correlation networks: Interdisciplinary approaches beyond thresholding https://www.sciencedirect.com/science/article/pii/S0370157325001784?dgcid=rss_sd_all

#Skyscrapers remain controversial, yet the continue to be built world over? Why do we build #cities in the sky? buildingtheskyline.org/cities-in-th...

Stuck inside hiding from the heat? You're not alone - especially when respiratory viruses are in the air indoors. Make sure not to miss this new study: we found that if just 10% of people mask during wildfires, it could offset increases in flu, RSV, and Covid-19. journals.plos.org/climate/arti...

How do cities expand? Using surface growth physics, we found a unique exponent governing their local geometry. Instead, their dynamics range from smooth diffusion to abrupt coalescence, with demographic pressure driving where each city lands on that spectrum. arxiv.org/abs/2506.10656