Kleber Oliveira
@kleber-ao.com
Computational mathematician @unioflimerick.bsky.social. (Social) network dynamics and information spreading.
Pinned
Kleber Oliveira
@kleber-ao.com
· Apr 29
Rumor propagation on hypergraphs
The rapid spread of information and rumors through social media platforms, especially in group settings, motivates the need for more sophisticated models of rumor propagation. Traditional pairwise mod...
arxiv.org
Now out: "Rumor propagation on hypergraphs" (arxiv.org/abs/2504.19305). We propose a higher-order rumour model incorporating a group-based annihilation mechanism. We run computational experiments to characterise the model's dynamics in synthetic and real systems... 1/5
Reposted by Kleber Oliveira
Come and do a PhD at Exeter with me and Chico Camargo (Computer Science) on human-genAI coevolution
"Leveraging Natural Language Processing for Data-Driven Agent-Based Modelling of Online Cultural Dynamics"
www.exeter.ac.uk/v8media/recr...
More details here:
www.exeter.ac.uk/study/fundin...
"Leveraging Natural Language Processing for Data-Driven Agent-Based Modelling of Online Cultural Dynamics"
www.exeter.ac.uk/v8media/recr...
More details here:
www.exeter.ac.uk/study/fundin...
www.exeter.ac.uk
November 14, 2025 at 3:14 PM
Come and do a PhD at Exeter with me and Chico Camargo (Computer Science) on human-genAI coevolution
"Leveraging Natural Language Processing for Data-Driven Agent-Based Modelling of Online Cultural Dynamics"
www.exeter.ac.uk/v8media/recr...
More details here:
www.exeter.ac.uk/study/fundin...
"Leveraging Natural Language Processing for Data-Driven Agent-Based Modelling of Online Cultural Dynamics"
www.exeter.ac.uk/v8media/recr...
More details here:
www.exeter.ac.uk/study/fundin...
Reposted by Kleber Oliveira
One week left to apply to the UVA Biology PhD program! If you or someone you know are interested in contagion from a complex systems perspective, please reach out! I'm looking for a grad student! bio.as.virginia.edu/how-apply-gr...
How to Apply to the Graduate Program
bio.as.virginia.edu
November 25, 2025 at 4:31 PM
One week left to apply to the UVA Biology PhD program! If you or someone you know are interested in contagion from a complex systems perspective, please reach out! I'm looking for a grad student! bio.as.virginia.edu/how-apply-gr...
Reposted by Kleber Oliveira
I think the shortest version of why LLMs are an anti education technology is that education is fundamentally about making shared context to understand ourselves, each other, and the world
And by design LLMs destroy shared context
And by design LLMs destroy shared context
November 23, 2025 at 12:57 PM
I think the shortest version of why LLMs are an anti education technology is that education is fundamentally about making shared context to understand ourselves, each other, and the world
And by design LLMs destroy shared context
And by design LLMs destroy shared context
Reposted by Kleber Oliveira
"Access to data by researchers is a crucial element of ensuring transparency and democratic accountability,” @lewan.bsky.social says. “The public is entitled to know what platforms and their algorithms are doing to the information landscape.”
I wrote for @science.org about Meta, TikTok and the DSA 🧪
I wrote for @science.org about Meta, TikTok and the DSA 🧪
Meta and TikTok are obstructing researchers’ access to data, European Commission rules
Data are needed to study how social media spreads misinformation and influences elections, scientists say
www.science.org
October 29, 2025 at 7:24 PM
"Access to data by researchers is a crucial element of ensuring transparency and democratic accountability,” @lewan.bsky.social says. “The public is entitled to know what platforms and their algorithms are doing to the information landscape.”
I wrote for @science.org about Meta, TikTok and the DSA 🧪
I wrote for @science.org about Meta, TikTok and the DSA 🧪
Reposted by Kleber Oliveira
arXiv alert! 📄🚨
A review paper about the physics of news, rumors, and opinions
arxiv.org/abs/2510.15053
w @manlius.bsky.social @sarawalk.bsky.social Guido Cadarelli et al.
A review paper about the physics of news, rumors, and opinions
arxiv.org/abs/2510.15053
w @manlius.bsky.social @sarawalk.bsky.social Guido Cadarelli et al.
The Physics of News, Rumors, and Opinions
The boundaries between physical and social networks have narrowed with the advent of the Internet and its pervasive platforms. This has given rise to a complex adaptive information ecosystem where ind...
arxiv.org
October 20, 2025 at 6:32 AM
arXiv alert! 📄🚨
A review paper about the physics of news, rumors, and opinions
arxiv.org/abs/2510.15053
w @manlius.bsky.social @sarawalk.bsky.social Guido Cadarelli et al.
A review paper about the physics of news, rumors, and opinions
arxiv.org/abs/2510.15053
w @manlius.bsky.social @sarawalk.bsky.social Guido Cadarelli et al.
Reposted by Kleber Oliveira
📣 NEW -- In The Economist, discussing the privacy perils of AI agents and what AI companies and operating systems need to do--NOW--to protect Signal and much else!
www.economist.com/by-invitatio...
www.economist.com/by-invitatio...
September 9, 2025 at 11:44 AM
📣 NEW -- In The Economist, discussing the privacy perils of AI agents and what AI companies and operating systems need to do--NOW--to protect Signal and much else!
www.economist.com/by-invitatio...
www.economist.com/by-invitatio...
Reposted by Kleber Oliveira
Uncritical adoption of AI “undermines our basic pedagogical values and principles of scientific integrity. It prevents us from maintaining our standards of independence & transparency. And most concerning, AI use … hinder[s] learning and deskill critical thought.” openletter.earth/open-letter-...
Open Letter: Stop the Uncritical Adoption of AI Technologies in Academia
openletter.earth
July 26, 2025 at 7:08 PM
Uncritical adoption of AI “undermines our basic pedagogical values and principles of scientific integrity. It prevents us from maintaining our standards of independence & transparency. And most concerning, AI use … hinder[s] learning and deskill critical thought.” openletter.earth/open-letter-...
Reposted by Kleber Oliveira
We ran a randomized controlled trial to see how much AI coding tools speed up experienced open-source developers.
The results surprised us: Developers thought they were 20% faster with AI tools, but they were actually 19% slower when they had access to AI than when they didn't.
The results surprised us: Developers thought they were 20% faster with AI tools, but they were actually 19% slower when they had access to AI than when they didn't.
July 10, 2025 at 7:47 PM
We ran a randomized controlled trial to see how much AI coding tools speed up experienced open-source developers.
The results surprised us: Developers thought they were 20% faster with AI tools, but they were actually 19% slower when they had access to AI than when they didn't.
The results surprised us: Developers thought they were 20% faster with AI tools, but they were actually 19% slower when they had access to AI than when they didn't.
Reposted by Kleber Oliveira
With everything else going on, I'm not sure people realize that Trump's latest tariff on Brazil took things to a new (lower) level
paulkrugman.substack.com/p/trumps-dic...
paulkrugman.substack.com/p/trumps-dic...
Trump's Dictator Protection Program
Using tariffs to fight democracy
paulkrugman.substack.com
July 9, 2025 at 11:02 PM
With everything else going on, I'm not sure people realize that Trump's latest tariff on Brazil took things to a new (lower) level
paulkrugman.substack.com/p/trumps-dic...
paulkrugman.substack.com/p/trumps-dic...
Reposted by Kleber Oliveira
the Brazilian replies to this post will take you on a fucking journey
A Brazilian comedian has been sentenced to 8 years in prison for ‘bigoted’ jokes told in 2022. The decision marks the latest effort by Brazil to place limits on freedom of expression.
Brazilian comedian sentenced to 8 years in prison for ‘bigoted’ jokes
The ruling against comedian Leo Lins for jokes told in 2022 is shaping up as the next front in Brazil’s escalating struggle over freedom of expression.
www.washingtonpost.com
June 8, 2025 at 1:08 AM
the Brazilian replies to this post will take you on a fucking journey
Reposted by Kleber Oliveira
If you're looking for a quite handy multitype branching process framework for modeling diffusion in networks with communities check this work by @davidjpos.bsky.social and friends. @netsciconf.bsky.social #netsci2025
June 5, 2025 at 9:48 AM
If you're looking for a quite handy multitype branching process framework for modeling diffusion in networks with communities check this work by @davidjpos.bsky.social and friends. @netsciconf.bsky.social #netsci2025
Fully-funded PhD positions to work with a fantastic team (and me 🫠) in a beautiful campus. Please share it with people who may be interested! Deadline on the 10th of July.
We're offering two funded PhD studentships in the ERC-Funded ID-Compression project at the University of Limerick, Ireland -- please pass on to any kind, curious & talented candidates who might be interested. Thank you! @csi-research.bsky.social
www.dropbox.com/scl/fi/svvz1...
www.dropbox.com/scl/fi/svvz1...
June 5, 2025 at 5:13 PM
Fully-funded PhD positions to work with a fantastic team (and me 🫠) in a beautiful campus. Please share it with people who may be interested! Deadline on the 10th of July.
Reposted by Kleber Oliveira
We often suppose that things like intelligence and opinions not only exist, but can be measured in a “correct” way. So our goal is to reduce the error as much as possible to get closer and closer to such “correct” measurement. [1/7]
May 13, 2025 at 7:56 AM
We often suppose that things like intelligence and opinions not only exist, but can be measured in a “correct” way. So our goal is to reduce the error as much as possible to get closer and closer to such “correct” measurement. [1/7]
Glad to share that next month I am joining @mikeq.bsky.social's group on a full-time research position in my alma mater.
I've been studying social systems for some time, but never from the theoretical foundations of how people act towards each other (which are from social psychology).
I've been studying social systems for some time, but never from the theoretical foundations of how people act towards each other (which are from social psychology).
May 12, 2025 at 1:07 PM
Glad to share that next month I am joining @mikeq.bsky.social's group on a full-time research position in my alma mater.
I've been studying social systems for some time, but never from the theoretical foundations of how people act towards each other (which are from social psychology).
I've been studying social systems for some time, but never from the theoretical foundations of how people act towards each other (which are from social psychology).
Reposted by Kleber Oliveira
Good piece in Science by @kakape.bsky.social on the massive censorship of scientific work by the U.S. government - all in the name of free speech, presumably: www.science.org/content/arti...
Trump’s team, often accused of spreading misinformation, slashes misinformation research
Hundreds of grants axed in a field where the United States was a global leader
www.science.org
May 1, 2025 at 7:37 AM
Good piece in Science by @kakape.bsky.social on the massive censorship of scientific work by the U.S. government - all in the name of free speech, presumably: www.science.org/content/arti...
Now out: "Rumor propagation on hypergraphs" (arxiv.org/abs/2504.19305). We propose a higher-order rumour model incorporating a group-based annihilation mechanism. We run computational experiments to characterise the model's dynamics in synthetic and real systems... 1/5
Rumor propagation on hypergraphs
The rapid spread of information and rumors through social media platforms, especially in group settings, motivates the need for more sophisticated models of rumor propagation. Traditional pairwise mod...
arxiv.org
April 29, 2025 at 1:55 PM
Now out: "Rumor propagation on hypergraphs" (arxiv.org/abs/2504.19305). We propose a higher-order rumour model incorporating a group-based annihilation mechanism. We run computational experiments to characterise the model's dynamics in synthetic and real systems... 1/5
Reposted by Kleber Oliveira
Reposted by Kleber Oliveira
Are you interested in inequalities, mobility and cities? Come to work with us as a postdoc at @ceu-dnds.bsky.social in Vienna in the Computational Human Dynamics Lab of @martonkarsai.bsky.social. Check the post here: careers.ceu.edu/job/Vienna-P...
@ic2s2.bsky.social @netscisociety.bsky.social
@ic2s2.bsky.social @netscisociety.bsky.social
Postdoctoral Researcher (f/m/d)
Postdoctoral Researcher (f/m/d)
careers.ceu.edu
April 23, 2025 at 11:33 AM
Are you interested in inequalities, mobility and cities? Come to work with us as a postdoc at @ceu-dnds.bsky.social in Vienna in the Computational Human Dynamics Lab of @martonkarsai.bsky.social. Check the post here: careers.ceu.edu/job/Vienna-P...
@ic2s2.bsky.social @netscisociety.bsky.social
@ic2s2.bsky.social @netscisociety.bsky.social
Reposted by Kleber Oliveira
If you study networks, or have been stuck listening to people who study networks for long enough (sorry to my loved ones), you may have heard that open triads – V shapes – in social networks tend to turn into closed triangles. But why does this happen? In part, because people repost each other.
April 1, 2025 at 8:00 PM
If you study networks, or have been stuck listening to people who study networks for long enough (sorry to my loved ones), you may have heard that open triads – V shapes – in social networks tend to turn into closed triangles. But why does this happen? In part, because people repost each other.
We've a new software paper out, check it below:
Our paper DOCES (Dynamical Opinion Clusters Exploration Suite) is now published in SoftwareX! 📄
DOCES helps model opinion dynamics in social networks, exploring polarization, algorithmic influence, and user behavior.
🔗 Paper: doi.org/10.1016/j.so...
📌 Library on PyPI: pypi.org/project/doces/
DOCES helps model opinion dynamics in social networks, exploring polarization, algorithmic influence, and user behavior.
🔗 Paper: doi.org/10.1016/j.so...
📌 Library on PyPI: pypi.org/project/doces/
April 2, 2025 at 9:57 AM
We've a new software paper out, check it below:
Reposted by Kleber Oliveira
🚨 New paper 🚨 Can big data solve all our measurement problems?
Measuring constructs like opinions, happiness, etc. is problematic as it depends on various choices, including the choice of variables and model.
[1/4]
pressto.amu.edu.pl/index.php/sr...
Measuring constructs like opinions, happiness, etc. is problematic as it depends on various choices, including the choice of variables and model.
[1/4]
pressto.amu.edu.pl/index.php/sr...
The hidden problem in Big Data: even infinite information does not guarantee consistent measurement
| Society Register
pressto.amu.edu.pl
March 25, 2025 at 8:31 AM
🚨 New paper 🚨 Can big data solve all our measurement problems?
Measuring constructs like opinions, happiness, etc. is problematic as it depends on various choices, including the choice of variables and model.
[1/4]
pressto.amu.edu.pl/index.php/sr...
Measuring constructs like opinions, happiness, etc. is problematic as it depends on various choices, including the choice of variables and model.
[1/4]
pressto.amu.edu.pl/index.php/sr...
Reposted by Kleber Oliveira
Now out our new preprint “Higher-order dissimilarity measures for hypergraph comparison”!
www.arxiv.org/abs/2503.16959
With Cosimo Agostinelli and @alainbarrat.bsky.social
We extend to hypergraphs similarity measures defined previously only on pairwise networks.
🧵⬇️ 1/5
www.arxiv.org/abs/2503.16959
With Cosimo Agostinelli and @alainbarrat.bsky.social
We extend to hypergraphs similarity measures defined previously only on pairwise networks.
🧵⬇️ 1/5
Higher-order dissimilarity measures for hypergraph comparison
In recent years, networks with higher-order interactions have emerged as a powerful tool to model complex systems. Comparing these higher-order systems remains however a challenge. Traditional similar...
www.arxiv.org
March 25, 2025 at 2:48 PM
Now out our new preprint “Higher-order dissimilarity measures for hypergraph comparison”!
www.arxiv.org/abs/2503.16959
With Cosimo Agostinelli and @alainbarrat.bsky.social
We extend to hypergraphs similarity measures defined previously only on pairwise networks.
🧵⬇️ 1/5
www.arxiv.org/abs/2503.16959
With Cosimo Agostinelli and @alainbarrat.bsky.social
We extend to hypergraphs similarity measures defined previously only on pairwise networks.
🧵⬇️ 1/5
Reposted by Kleber Oliveira
Open postdoc position at @ceu-dnds.bsky.social in Vienna in the Computational Human Dynamics Lab of @martonkarsai.bsky.social on inequalities in 15-minutes cities in collaboration with www.dut-coline.org. Check it out: careers.ceu.edu/job/Vienna-P...
@ic2s2.bsky.social @netscisociety.bsky.social
@ic2s2.bsky.social @netscisociety.bsky.social
March 19, 2025 at 9:21 AM
Open postdoc position at @ceu-dnds.bsky.social in Vienna in the Computational Human Dynamics Lab of @martonkarsai.bsky.social on inequalities in 15-minutes cities in collaboration with www.dut-coline.org. Check it out: careers.ceu.edu/job/Vienna-P...
@ic2s2.bsky.social @netscisociety.bsky.social
@ic2s2.bsky.social @netscisociety.bsky.social
Reposted by Kleber Oliveira
I wanted to highlight key findings from our study and the replication, and how they extend to 2024.
Now it provides a systematic review of more than 600 scientific studies on the relationship between digitalization and democracy.
So what does science have to say? We actually know quite a bit: 1/5
Now it provides a systematic review of more than 600 scientific studies on the relationship between digitalization and democracy.
So what does science have to say? We actually know quite a bit: 1/5
March 8, 2025 at 4:01 PM
I wanted to highlight key findings from our study and the replication, and how they extend to 2024.
Now it provides a systematic review of more than 600 scientific studies on the relationship between digitalization and democracy.
So what does science have to say? We actually know quite a bit: 1/5
Now it provides a systematic review of more than 600 scientific studies on the relationship between digitalization and democracy.
So what does science have to say? We actually know quite a bit: 1/5