Tootfinder

Identification of Active Subfunctions in Finite-Max Minimisation via a Smooth Reformulation
Charl Ras, Matthew Tam, Daniel Uteda
https://arxiv.org/abs/2404.10326

Identification of Active Subfunctions in Finite-Max Minimisation via a Smooth Reformulation
In this work, we consider a nonsmooth minimisation problem in which the objective function can be represented as the maximum of finitely many smooth ``subfunctions''. First, we study a smooth min-max reformulation of the problem. Due to this smoothness, the model provides enhanced capability of exploiting the structure of the problem, when compared to methods that attempt to tackle the nonsmooth problem directly. Then, we present several approaches to identify the set of active subfunctions at …

Perturbations of Markov Chains
Daniel Rudolf, Aaron Smith, Matias Quiroz
https://arxiv.org/abs/2404.10251 https://arxiv.org/pdf/2404.…

Perturbations of Markov Chains
This chapter surveys progress on three related topics in perturbations of Markov chains: the motivating question of when and how "perturbed" MCMC chains are developed, the theoretical problem of how perturbation theory can be used to analyze such chains, and finally the question of how the theoretical analyses can lead to practical advice.

Integral action feedback design for conservative abstract systems in the presence of input nonlinearities
Ling Ma (LAGEPP), Vincent Andrieu (LAGEP, CNRS), Daniele Astolfi (CNRS, LAGEPP), Mathieu Bajodek (LAGEPP, CPE), Cheng-Zhong Xu (LAGEP), Xuyang Lou
https://arxiv.org/abs/2405.09986

Some interesting papers at Past Meets Future: Workshop on Human-AI Interaction for Digital History and Cultural Heritage back in March https://sites.google.com/vt.edu/pastmeetsfuturehaiworkshop/accepted-submissions

MRSegmentator: Robust Multi-Modality Segmentation of 40 Classes in MRI and CT Sequences
Hartmut H\"antze, Lina Xu, Felix J. Dorfner, Leonhard Donle, Daniel Truhn, Hugo Aerts, Mathias Prokop, Bram van Ginneken, Alessa Hering, Lisa C. Adams, Keno K. Bressem
https://arxiv.org/abs/2405.06463

Direct numerical simulations of microlayer formation during heterogeneous bubble nucleation
Mandeep Saini, Xiang Bin Chen, Stephane Zaleski, Daniel Fuster
https://arxiv.org/abs/2404.08377

Direct numerical simulations of microlayer formation during heterogeneous bubble nucleation
In this article, we present direct numerical simulation results for the expansion of spherical cap bubbles attached to a rigid wall due to a sudden drop in the ambient pressure. The critical pressure drop beyond which the bubble growth becomes unstable is found to match well with the predictions from classical theory of heterogeneous nucleation imposing a quasi-static bubble evolution. When the pressure drop is significantly higher than the critical value, a liquid microlayer appears between th…

Laser induced $\mathcal{PT}$-symmetry breaking in the fluctuations of electronic fluids
Rui Aquino, Nathan O. Silvano, Daniel G. Barci
https://arxiv.org/abs/2406.08576

Laser induced $\mathcal{PT}$-symmetry breaking in the fluctuations of electronic fluids
Electronic fluids can display exciting dynamical properties. In particular, due to Landau damping, the collective modes spectrum of an electronic system with multipolar interactions is non-hermitian, and can present non-hermitian degeneracies called $\textit{exceptional points}$. In this work, we want to explore the dynamical properties of these degeneracies using laser control. We show that by using a light pulse, we can control the collective mode spectrum and tune a non-hermitian $\mathcal{P…

Climate - the Movie: a hot mess of (c)old myths!
https://skepticalscience.com/climate-the-movie-a-hot-mess-of-cold-myths.html

Results from the CsI Calorimeter onboard the 2023 ComPair Balloon Flight
Daniel Shy, Richard S. Woolf, Clio Sleator, Bernard Phlips, J. Eric Grove, Eric A. Wulf, Mary Johnson-Rambert, Mitch Davis, Emily Kong, Thomas Caligiure, A. Wilder Crosier, Aleksey Bolotnikov, Nicholas Cannady, Gabriella A. Carini, Regina Caputo, Jack Fried, Priyarshini Ghosh, Sean Griffin, Elizabeth Hays, Sven Herrmann, Carolyn Kierans, Nicholas Kirschner, Iker Liceaga-Indart, Julie McEnery, John Mitchell, A. A. …

Matroidal polynomials, their singularities, and applications to Feynman diagrams
Daniel Bath, Uli Walther
https://arxiv.org/abs/2404.07885 https://<…

Matroidal polynomials, their singularities, and applications to Feynman diagrams
Given a matroid or flag of matroids we introduce several broad classes of polynomials satisfying Deletion-Contraction identities, and study their singularities. There are three main families of polynomials captured by our approach: matroidal polynomials on a matroid (including matroid basis polynomials, configuration polynomials, Tutte polynomials); flag matroidal polynomials on a flag matroid; and Feynman integrands. The last class includes under general kinematics the inhomogeneous Feynman …