Tootfinder

train_terrorists: Madrid train bombing terrorists (2004)
A network of associations among the terrorists involved in the 2004 Madrid train bombing, as reconstructed from press stories after-the-fact. Edge weights encode four levels of connection strength: friendships, ties to Al Qaeda and Osama Bin Laden, co-participants in wars, and co-participants in previous terrorist attacks.
This network has 64 nodes and 243 edges.
Tags: Social, Offline, Weighted

[OT] Protecting science: TIB builds dark archive for arXiv #arXiv; …

Protecting Science: TIB builds Dark Archive for arXiv - TIB-Blog
Research and science are international; it is not for nothing that we speak of international specialist communities. Although a service such as arXiv is operated by an institution based in the USA, namely Cornell University, it is used by researchers worldwide. Part of arXiv‘s funding has also been internationalised since 2010 with the introduction of arXiv membership. The TIB finances the German contribution together with the Helmholtz Association of German Research Centres (HGF) and the Max…

Roux schemes which carry association schemes locally
Alexander L. Gavrilyuk, Jesse Lansdown, Akihiro Munemasa, Sho Suda
https://arxiv.org/abs/2507.18960 https://

Roux schemes which carry association schemes locally
A roux scheme is an association scheme formed from a special "roux" matrix and the regular permutation representation of an associated group. They were introduced by Iverson and Mixon for their connection to equiangular tight frames and doubly transitive lines. We show how roux matrices can be produced from association schemes and characterise roux schemes for which the neighbourhood of a vertex induces an association scheme possessing the same number of relations as the thin radical. An import…

even more famous!
https://english.elpais.com/people/2024-02-10/that-ferrari-isnt-going-to-pay-for-itself-the-controversial-rise-of-jeremy-fragrance-the-perfume-influencer.html

Central limit theorems for the eigenvalues of graph Laplacians on data clouds
Chenghui Li, Nicol\'as Garc\'ia Trillos, Housen Li, Leo Suchan
https://arxiv.org/abs/2507.18803

Central limit theorems for the eigenvalues of graph Laplacians on data clouds
Given i.i.d.\ samples $X_n =\{ x_1, \dots, x_n \}$ from a distribution supported on a low dimensional manifold ${M}$ embedded in Eucliden space, we consider the graph Laplacian operator $Δ_n$ associated to an $\varepsilon$-proximity graph over $X_n$ and study the asymptotic fluctuations of its eigenvalues around their means. In particular, letting $\hatλ_l^\varepsilon$ denote the $l$-th eigenvalue of $Δ_n$, and under suitable assumptions on the data generating model and on the rate of decay …

Optimizing fMRI Data Acquisition for Decoding Natural Speech with Limited Participants
Louis Jalouzot, Alexis Thual, Yair Lakretz, Christophe Pallier, Bertrand Thirion
https://arxiv.org/abs/2505.21304

Optimizing fMRI Data Acquisition for Decoding Natural Speech with Limited Participants
We investigate optimal strategies for decoding perceived natural speech from fMRI data acquired from a limited number of participants. Leveraging Lebel et al. (2023)'s dataset of 8 participants, we first demonstrate the effectiveness of training deep neural networks to predict LLM-derived text representations from fMRI activity. Then, in this data regime, we observe that multi-subject training does not improve decoding accuracy compared to single-subject approach. Furthermore, training on simil…

This https://arxiv.org/abs/2505.13727 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Kummer Surfaces, Isogenies and Theta Functions
The paper discusses geometric and computational aspects associated with $(n,n)$-isogenies for principally polarized Abelian surfaces and related Kummer surfaces. We start by reviewing the comprehensive Theta function framework for classifying genus-two curves, their principally polarized Jacobians, as well as for establishing explicit quartic normal forms for associated Kummer surfaces. This framework is then used for practical isogeny computations. A particular focus of the discussion is the $…

Update to my loftyassist product adventure, with a new twist.
At 116 users, 18 paid plans.
New twist? I might be getting hired by Lofty to do some contract work for them. Let's see what the terms look like, but if all looks good, I might be transferring over some of my lofty assist ideas onto lofty itself. Pretty funny turn of events.

artificial intelligence “enables the cost of misinformation to come close to zero.” 
And it is starts with flooding Canadian city council mailboxes with climate misinformation https://www.nationalobserver.com/2025/05/2

Time-tagging data acquisition system for testing superconducting electronics based on an RFSoC and custom analog frontend
Reed A. Foster, Stephen Kandeh, Owen Medeiros, Alejandro Simon, Matteo Castellani, Karl K. Berggren
https://arxiv.org/abs/2505.21714

Time-tagging data acquisition system for testing superconducting electronics based on an RFSoC and custom analog frontend
Novel electronic devices can often be operated in a plethora of ways, which makes testing circuits comprised of them difficult. Often, no single tool can simultaneously analyze the operating margins, maximum speed, and failure modes of a circuit, particularly when the intended behavior of subcomponents of the circuit is not standardized. This work demonstrates a cost-effective data acquisition system for electronic circuits that enables more intricate verification techniques than are practical …