Tootfinder

PermRust: A Token-based Permission System for Rust
Lukas Gehring, Sebastian Rehms, Florian Tschorsch
https://arxiv.org/abs/2506.11701 https://

PermRust: A Token-based Permission System for Rust
Permission systems which restrict access to system resources are a well-established technology in operating systems, especially for smartphones. However, as such systems are implemented in the operating system they can at most manage access on the process-level. Since moderns software often (re)uses code from third-parties libraries, a permission system for libraries can be desirable to enhance security. In this short-paper, we adapt concepts from capability systems building a novel theoretical…

En Espagne, l’étau judiciaire se referme autour du noyau dur qui a permis l’accession au pouvoir de Pedro Sanchez
https://www.lemonde.fr/international/artic

En Espagne, l’étau judiciaire se referme autour du noyau dur qui a permis l’accession au pouvoir de Pedro Sanchez
Depuis deux ans, plusieurs proches du président socialiste du gouvernement font l’objet d’enquêtes portant sur des soupçons de pots-de-vin. Jeudi, M. Sanchez a dû exiger la démission de l’homme clé de l’appareil du parti socialiste, Santos Cerdan.

Primordial Black Holes are 5D
Luis A. Anchordoqui, Alek Bedroya, Dieter L\"ust
https://arxiv.org/abs/2506.14874 https://arxiv.or…

Primordial Black Holes are 5D
We revisit well-established mechanisms for primordial black hole (PBH) production, namely inflation, phase transitions, and cosmic strings, in the context of the Dark Dimension Scenario, which is motivated by Swampland principles. Applying quantum gravity constraints, we demonstrate that any viable mechanism, barring exotic new physics at low energies, inevitably leads to the formation of five-dimensional PBHs. We further show that PBHs formed from cosmic strings can have lifetimes comparable t…

Versatile SPH Open Boundary Conditions for Multiphase Flows in Extreme Condition
Zi-Yang Zhan, Zhen Chen
https://arxiv.org/abs/2506.14500 https://

Versatile SPH Open Boundary Conditions for Multiphase Flows in Extreme Condition
Although the Smoothed Particle Hydrodynamics (SPH) method has been demonstrated as a promising numerical solver for multiphase flow problems due to its Lagrangian nature, its application to complex channel flow may encounter additional issues such as the open boundary condition and numerical instability in the extreme flow state. The present work aims to establish a general SPH algorithm for accurate and stable simulation of complex multiphase flows in configurations with open boundaries. The g…

Level-3 large deviations for the white-forced 2D Navier-Stokes system in a bounded domain
Meng Zhao
https://arxiv.org/abs/2506.14119 https://

Level-3 large deviations for the white-forced 2D Navier-Stokes system in a bounded domain
We study the large deviations principle (LDP) of Donsker-Varadhan type for the white-forced Navier-Stokes system in a bounded domain. Under the assumption that the noise is non-degenerate, we establish level-2 and level-3 LDPs with rate functions given by the Donsker-Varadhan formulas. The proof relies on an improved version of Kifer's criterion, a lift argument inspired from [DV83], an improved abstract result on the large-time asymptotics of generalized Markov semigroups, and a delicate appro…

An infinite horizon sufficient stochastic maximum principle for regime switching diffusions and applications
Kai Ding, Xun Li, Siyu Lv, Xin Zhang
https://arxiv.org/abs/2506.11523 …

An infinite horizon sufficient stochastic maximum principle for regime switching diffusions and applications
This paper is concerned with a discounted stochastic optimal control problem for regime switching diffusion in an infinite horizon. First, as a preliminary with particular interests in its own right, the global well-posedness of infinite horizon forward and backward stochastic differential equations with Markov chains and the asymptotic property of their solutions when time goes to infinity are obtained. Then, a sufficient stochastic maximum principle for optimal controls is established via a d…

The User Perspective on Island-Ready 6G Communication: A Survey of Future Smartphone Usage in Crisis-Struck Areas with Local Cellular Connectivity
Leon Janzen, Florentin Putz, Marc-Andr\'e Kaufhold, Kolja Straub, Matthias Hollick
https://arxiv.org/abs/2506.13466

The User Perspective on Island-Ready 6G Communication: A Survey of Future Smartphone Usage in Crisis-Struck Areas with Local Cellular Connectivity
Using smartphone apps during crises is well-established, proving critical for efficient crisis response. However, such apps become futile without an Internet connection, which is a common issue during crises. The ongoing 6G standardization explores the capability to provide local cellular connectivity for areas cut off from the Internet in crises. This paper introduces to the HCI community the concept of cellular island connectivity in isolated areas, promising a seamless transition from normal…

Cosmological effect of coherent oscillation of ultralight scalar fields in a multicomponent universe
Priyanka Saha, Dipanjan Dey, Kaushik Bhattacharya
https://arxiv.org/abs/2506.12863

Cosmological effect of coherent oscillation of ultralight scalar fields in a multicomponent universe
The idea that coherent oscillations of a scalar field, oscillating over a time period that is much shorter than the cosmological timescale, can exhibit cold dark matter (CDM) like behavior was previously established. In our work we first show that this equivalence between the oscillating scalar field model and the CDM sector is exact only in a flat Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime in the absence of cosmological constant and any other possible matter components in the univers…

This https://arxiv.org/abs/2506.03703 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csLG_…

Learning-at-Criticality in Large Language Models for Quantum Field Theory and Beyond
Fundamental physics often confronts complex symbolic problems with few guiding exemplars or established principles. While artificial intelligence (AI) offers promise, its typical need for vast datasets to learn from hinders its use in these information-scarce frontiers. We introduce learning at criticality (LaC), a reinforcement learning (RL) scheme that tunes Large Language Models (LLMs) to a sharp learning transition, addressing this information scarcity. At this transition, LLMs achieve peak…

Regularizing effects of absorption terms in local-nonlocal mild singular problems
Stefano Biagi, Enzo Maria Merlino, Eugenio Vecchi
https://arxiv.org/abs/2506.11656

Regularizing effects of absorption terms in local-nonlocal mild singular problems
In this paper we prove existence and uniqueness of energy solutionns for singular problems with absorption driven by local-nonlocal operators. Moreover, we establish a comparison principle à la Talenti, leading to a gain of summability result for the solutions of these problems.