Tootfinder

Concept activation vectors: a unifying view and adversarial attacks
Ekkehard Schnoor, Malik Tiomoko, Jawher Said, Alex Jung, Wojciech Samek
https://arxiv.org/abs/2509.22755 http…

Concept activation vectors: a unifying view and adversarial attacks
Concept Activation Vectors (CAVs) are a tool from explainable AI, offering a promising approach for understanding how human-understandable concepts are encoded in a model's latent spaces. They are computed from hidden-layer activations of inputs belonging either to a concept class or to non-concept examples. Adopting a probabilistic perspective, the distribution of the (non-)concept inputs induces a distribution over the CAV, making it a random vector in the latent space. This enables us to der…

Es una religión
“It’s a religion. We believe in technology. Technology is God. It’s really hard to push back against it. People don’t want to hear it.”
How AGI became the most consequential conspiracy theory of our time.
MIT Tech. Review:
https://www.

Talarico Outraises Allred With Massive Haul - The Concho Observer #Texas

Talarico Outraises Allred With Massive Haul
State Rep. James Talarico raised $6.2 million in the first three weeks of his bid for Senate, his campaign announced Wednesday.

Aerodynamic performance and robustness of a nature-inspired concept for a micro-scale wind turbine
J. M. Catal\'an, G. Arranz, M. Moriche, M. Guerrero-Hurtado, M. Garc\'ia-Villalba, O. Flores
https://arxiv.org/abs/2509.24998

Aerodynamic performance and robustness of a nature-inspired concept for a micro-scale wind turbine
We present direct numerical simulations of a novel concept for a micro-scale wind turbine, inspired in the mechanics of the auto-rotation of winged seeds. In this nature-inspired concept the turbine blades have two degrees of freedom: the pitch and the elevation (or coning) angles. These allow the blade to vary its attitude with respect to the incoming velocity seen by the blade (i.e., the tip-speed ratio, $λ$). In order to validate this new concept, we perform numerical simulations of the cou…

Trump's NASA chief hits back at Kim Kardashian: Yes, we've been to the moon (Elena Giordano/Politico)
https://www.politico.eu/article/nasa-sean-duffy-rebuffs-kim-kardashians-conspiracy-theory-moon-landing-fake/
http://www.memeorandum.com/251031/p50#a251031p50

Concavity of spacetimes
Tobias Beran, Darius Er\"os, Shin-ichi Ohta, Felix Rott
https://arxiv.org/abs/2509.26196 https://arxiv.org/pdf/2509.26196

Concavity of spacetimes
Motivated by recent breathtaking progress in the synthetic study of Lorentzian geometry, we investigate the local concavity of time separation functions on Finsler spacetimes as a Lorentzian counterpart to Busemann's convexity in metric geometry. We show that a Berwald spacetime is locally concave if and only if its flag curvature is nonnegative in timelike directions. We also give another characterization of nonnegative flag curvature by the convexity of future (or past) capsules, inspired by …

From Code to Concept: Evaluating Multiple Coordinated Views in Introductory Programming
Naaz Sibia, Valeria Ramirez Osorio, Jessica Wen, Rutwa Engineer, Angela Zavaleta Bernuy, Andrew Petersen, Michael Liut, Carolina Nobre
https://arxiv.org/abs/2509.26466

From Code to Concept: Evaluating Multiple Coordinated Views in Introductory Programming
Novice programmers often struggle to understand how code executes and to form the abstract mental models necessary for effective problem-solving, challenges that are amplified in large, diverse introductory courses where students' backgrounds, language proficiencies, and prior experiences vary widely. This study examines whether interactive, multi-representational visualizations, combining synchronized code views, memory diagrams, and conceptual analogies, can help manage cognitive load and fos…

Spectral gap of Metropolis-within-Gibbs under log-concavity
Cecilia Secchi, Giacomo Zanella
https://arxiv.org/abs/2509.26175 https://arxiv.org/pdf/2509.261…

Spectral gap of Metropolis-within-Gibbs under log-concavity
The Metropolis-within-Gibbs (MwG) algorithm is a widely used Markov Chain Monte Carlo method for sampling from high-dimensional distributions when exact conditional sampling is intractable. We study MwG with Random Walk Metropolis (RWM) updates, using proposal variances tuned to match the target's conditional variances. Assuming the target $π$ is a $d$-dimensional log-concave distribution with condition number $κ$, we establish a spectral gap lower bound of order $\mathcal{O}(1/κd)$ for the …

Privy: Envisioning and Mitigating Privacy Risks for Consumer-facing AI Product Concepts
Hao-Ping Lee, Yu-Ju Yang, Matthew Bilik, Isadora Krsek, Thomas Serban von Davier, Kyzyl Monteiro, Jason Lin, Shivani Agarwal, Jodi Forlizzi, Sauvik Das
https://arxiv.org/abs/2509.23525

Privy: Envisioning and Mitigating Privacy Risks for Consumer-facing AI Product Concepts
AI creates and exacerbates privacy risks, yet practitioners lack effective resources to identify and mitigate these risks. We present Privy, a tool that guides practitioners through structured privacy impact assessments to: (i) identify relevant risks in novel AI product concepts, and (ii) propose appropriate mitigations. Privy was shaped by a formative study with 11 practitioners, which informed two versions -- one LLM-powered, the other template-based. We evaluated these two versions of Privy…

When Langevin Monte Carlo Meets Randomization: Non-asymptotic Error Bounds beyond Log-Concavity and Gradient Lipschitzness
Xiaojie Wang, Bin Yang
https://arxiv.org/abs/2509.25630

When Langevin Monte Carlo Meets Randomization: Non-asymptotic Error Bounds beyond Log-Concavity and Gradient Lipschitzness
Efficient sampling from complex and high dimensional target distributions turns out to be a fundamental task in diverse disciplines such as scientific computing, statistics and machine learning. In this paper, we revisit the randomized Langevin Monte Carlo (RLMC) for sampling from high dimensional distributions without log-concavity. Under the gradient Lipschitz condition and the log-Sobolev inequality, we prove a uniform-in-time error bound in $\mathcal{W}_2$-distance of order $O(\sqrt{d}h)$ f…