Tootfinder

Don't leave for the weekend without reading today's Metacurit for the most critical infosec developments you should know today, including
--US sanctions Filipino firm for pig butchering scams that cost Americans $200 million
--DIA IT specialist tried to share classified info,
--Oz firms must now report paying ransom,
--Oregon bans sale of precise geolocation data,
--CISA's KEV catalog has unexploitable flaws,
--ConnectWise reports APT cyberattac…

US sanctions Filipino firm for pig butchering scams that cost Americans $200 million
DIA IT specialist tried to share classified info, Oz firms must now report paying ransom, Oregon bans sale of precise geolocation data, CISA's KEV catalog has unexploitable flaws, ConnectWise reports APT cyberattack, Imposter posed as WH chief of staff, Netskope preps for $500m IPO, much more

This https://arxiv.org/abs/2406.12007 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Supervised binary classification of small-scale digit images and weighted graphs with a trapped-ion quantum processor
Here we present the results of benchmarking a quantum processor based on trapped $^{171}$Yb$^{+}$ ions by performing basic quantum machine learning algorithms. Using a quantum-enhanced support vector machine algorithm with up to five qubits we perform a supervised binary classification on two types of datasets: small binary digit images and weighted graphs with a ring topology. For the first dataset, images are intentionally selected so that they could be classified with 100% accuracy. This all…

This https://arxiv.org/abs/2403.16434 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

The classification of complete improper affine spheres with singularities of low total curvature and new examples
We provide a classification of complete improper affine spheres with singularities (say \emph{improper affine fronts}) in unimodular affine three-space $\boldsymbol{R}^3$ whose total curvature is greater than or equal to $-6π$, and a partial classification in the case of total curvature $-8π$. For the case of total curvature $-8π$, we give a complete classification for genus $0$ case and show the existence of an example and a one parameter family with genus $1$. We also study the asymptotic …

Spectrotemporal Modulation: Efficient and Interpretable Feature Representation for Classifying Speech, Music, and Environmental Sounds
Andrew Chang, Yike Li, Iran R. Roman, David Poeppel
https://arxiv.org/abs/2505.23509

Spectrotemporal Modulation: Efficient and Interpretable Feature Representation for Classifying Speech, Music, and Environmental Sounds
Audio DNNs have demonstrated impressive performance on various machine listening tasks; however, most of their representations are computationally costly and uninterpretable, leaving room for optimization. Here, we propose a novel approach centered on spectrotemporal modulation (STM) features, a signal processing method that mimics the neurophysiological representation in the human auditory cortex. The classification performance of our STM-based model, without any pretraining, is comparable to …

Expressivity of bisimulation pseudometrics over analytic state spaces
Daniel Luckhardt, Harsh Beohar, Clemens Kupke
https://arxiv.org/abs/2505.23635 https:…

Expressivity of bisimulation pseudometrics over analytic state spaces
A Markov decision process (MDP) is a state-based dynamical system capable of describing probabilistic behaviour with rewards. In this paper, we view MDPs as coalgebras living in the category of analytic spaces, a very general class of measurable spaces. Note that analytic spaces were already studied in the literature on labelled Markov processes and bisimulation relations. Our results are twofold. First, we define bisimulation pseudometrics over such coalgebras using the framework of fibrations…

Codimension one distributions of degree 3 on the three-dimensional projective space
Hugo Galeano, Orlando Chaljub
https://arxiv.org/abs/2505.23241 https://…

Codimension one distributions of degree 3 on the three-dimensional projective space
We make a classification of codimension one degree 3 distributions on the projective three space, giving possible Chern classes of the tangent sheaf and describing de zero and one dimensional components of the singular scheme of the distribution. Also, we show the existence and describe some moduli spaces of such distributions, using the concept of stability of the tangent sheaf.

This https://arxiv.org/abs/2502.04080 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

AT 2018dyk: tidal disruption event or active galactic nucleus? Follow-up observations of an extreme coronal line emitter with the Dark Energy Spectroscopic Instrument
We present fresh insights into the nature of the tidal disruption event (TDE) candidate AT 2018dyk. AT 2018dyk has sparked a debate in the literature around its classification as either a bona-fide TDE or as an active galactic nucleus (AGN) turn-on state change. A new follow-up spectrum taken with the Dark Energy Spectroscopic Instrument, in combination with host-galaxy analysis using archival SDSS-MaNGA data, supports the identification of AT 2018dyk as a TDE. Specifically, we classify this ob…

Categorical Lyapunov Theory II: Stability of Systems
Aaron D. Ames, S\'ebastien Mattenet, Joe Moeller
https://arxiv.org/abs/2505.22968 https://

Categorical Lyapunov Theory II: Stability of Systems
Lyapunov's theorem provides a foundational characterization of stable equilibrium points in dynamical systems. In this paper, we develop a framework for stability for F-coalgebras. We give two definitions for a categorical setting in which we can study the stability of a coalgebra for an endofunctor F. One is minimal and better suited for concrete settings, while the other is more intricate and provides a richer theory. We prove a Lyapunov theorem for both notions of setting for stability, and …

Patient Domain Supervised Contrastive Learning for Lung Sound Classification Using Mobile Phone
Seung Gyu Jeong, Seong Eun Kim
https://arxiv.org/abs/2505.23132

Patient Domain Supervised Contrastive Learning for Lung Sound Classification Using Mobile Phone
Auscultation is crucial for diagnosing lung diseases. The COVID-19 pandemic has revealed the limitations of traditional, in-person lung sound assessments. To overcome these issues, advancements in digital stethoscopes and artificial intelligence (AI) have led to the development of new diagnostic methods. In this context, our study aims to use smartphone microphones to record and analyze lung sounds. We faced two major challenges: the difference in audio style between electronic stethoscopes and…

This https://arxiv.org/abs/2504.06592 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csLO_…

On Coalgebraic Product Constructions for Markov Chains and Automata
Verifying traces of systems is a central topic in formal verification. We study model checking of Markov chains (MCs) against temporal properties represented as (finite) automata. For instance, given an MC and a deterministic finite automaton (DFA), a simple but practically useful model checking problem asks for the probability of traces on the MC that are accepted by the DFA. A standard approach to solving this problem constructs a product MC of the given MC and DFA, reducing the task to a sim…