Tootfinder

Verification of the NOAA Space Weather Prediction Center solar flare forecast (1998-2024)
Enrico Camporeale, Thomas E. Berger
https://arxiv.org/abs/2508.01114 https://

Verification of the NOAA Space Weather Prediction Center solar flare forecast (1998-2024)
The NOAA Space Weather Prediction Center (SWPC) issues the official U.S. government forecast for M-class and X-class solar flares, yet the skill of these forecasts has never been comprehensively verified. In this study, we evaluate the SWPC probabilistic flare forecasts over a 26-year period (1998-2024), comparing them to several zero-cost and statistical baselines including persistence, climatology, Naive Bayes, and logistic regression. We find that the SWPC model does not outperform these bas…

Large-Amplitude Steady Rotational Solitary Waves Under Normal Electric Fields
Tingting Feng, Yong Zhang, Zhitao Zhang
https://arxiv.org/abs/2508.01336 https://

Large-Amplitude Steady Rotational Solitary Waves Under Normal Electric Fields
This paper considers large-amplitude, two-dimensional and rotational solitary waves propagating under a normal electric field. We present a new model for nonlinear systems with a free surface, governed by Euler and electric potential equations. Unlike previous works, our work allows internal stagnation points and overhanging profiles. We prove the existence of a continuous curve of large-amplitude solitary wave solutions using analytic bifurcation theory and conformal mapping. Furthermore, to e…

Bulk asymptotics of the Gaussian $\beta$-ensemble characteristic polynomial
Gaultier Lambert, Elliot Paquette
https://arxiv.org/abs/2508.01458 https://arxi…

Bulk asymptotics of the Gaussian $β$-ensemble characteristic polynomial
The Gaussian $β$-ensemble (G$β$E) is a fundamental model in random matrix theory. In this paper, we provide a comprehensive asymptotic description of the characteristic polynomial of the G$β$E anywhere in the bulk of the spectrum that simultaneously captures both local-scale fluctuations (governed by the Sine-$β$ point process) and global/mesoscopic log-correlated Gaussian structure, which is accurate down to vanishing errors as $N\to\infty$. As immediate corollaries, we obtain several im…

A Two-Gauge Field Model for Magnetoelectric Boundaries
F. A. Barone, H. L. Oliveira, J. P. Ferreira
https://arxiv.org/abs/2508.21697 https://arxiv.org/pdf/…

A Two-Gauge Field Model for Magnetoelectric Boundaries
This work introduces a field-theoretical model designed to simulate the presence of material layers with magnetoelectric properties. The model comprises the standard Maxwell field coupled to a Chern-Simons field confined to a planar layer. The electromagnetic behavior of the boundary is emulated through the interaction between the Chern-Simons and Maxwell fields, governed by two parameters: the Chern-Simons mass and the coupling constant between the fields. Both parameters can be adjusted to re…

Machine-precision energy conservative quadrature hyperreduction of Lagrangian hydrodynamics
Chris Vales, Siu Wun Cheung, Dylan M. Copeland, Youngsoo Choi
https://arxiv.org/abs/2508.21279

Machine-precision energy conservative quadrature hyperreduction of Lagrangian hydrodynamics
We present an energy conservative, quadrature based model reduction framework for the compressible Euler equations of Lagrangian hydrodynamics. Building on a high order finite element discretization of the governing equations, we develop a projection based reduced model using data driven reduced basis functions and hyperreduction via the empirical quadrature procedure (EQP). We introduce a strongly energy conservative variant of EQP that enforces exact discrete total energy conservation during …

from my link log —
Cracking the Vault: flaws in authentication, identity, and authorization in HashiCorp Vault.
https://cyata.ai/blog/cracking-the-vault-how-we-found-zero-day-flaws-in-authe…

Cracking the Vault: how we found zero-day flaws in authentication, identity, and authorization in HashiCorp Vault - Cyata | The Control Plane for Agentic Identity
Introduction: when the trust model can’t be trusted Secrets vaults are the backbone of digital infrastructure. They store the credentials, tokens, and certificates that govern access to systems, services, APIs, and data. They’re not just a part of the trust model, they are the trust model. In other words, if your vault is compromised, your […]

Development and experimental validation of a mathematical model for fluoride-removal filters comprising chemically treated mineral rich carbon
Lucy C. Auton, Shanmuk S. Ravuru, Sirshendu De, Tim G. Myers, Abel Valverde
https://arxiv.org/abs/2507.21116

Development and experimental validation of a mathematical model for fluoride-removal filters comprising chemically treated mineral rich carbon
Excessive fluoride intake can lead to dental and skeletal fluorosis, among other health issues. Naturally occurring fluoride and industrial runoff can result in concentrations far exceeding the World Health Organization's recommended limits in water supplies. In this study, we derive a model incorporating the dominant mechanisms governing fluoride removal from drinking water using the two adsorbents mineral-rich carbon (MRC) and chemically treated mineral-rich carbon (TMRC). Using both new and …

Sen. Alex Padilla says he was at the Wilshire Federal Building waiting to start a briefing with top military officials when he heard that Kristi L. Noem,
the homeland security secretary,
was holding a news conference on the federal presence there.
He asked the people escorting him if he could attend it.
Noem was in the middle of criticizing local leaders as “socialists” and “burdensome” for not coordinating more closely with the federal government
when Padilla…

What did Sen. Alex Padilla get handcuffed for?
The California Democrat was muscled to the ground after interrupting a Homeland Security news conference. He wondered if it was worth it.

The dominant role of jetting in micron- and sub-micron sea spray produced by bubble bursting: a revised model and comparison with measurements
Alfonso M. Ganan-Calvo, Miguel A. Herrada, Jose M. Lopez-Herrera
https://arxiv.org/abs/2506.17836

The dominant role of jetting in micron- and sub-micron sea spray produced by bubble bursting: a revised model and comparison with measurements
The primary physical mechanism governing the production of sub-micron sea spray aerosols (SSA) -- specifically the competition between film and jet droplets from bubble bursting -- has remained a subject of intense debate. This work presents a revised, first-principles model that establishes the overwhelming dominance of jetting for producing micron and sub-micron aerosols. Our approach first rules out the film droplet mechanism as a primary contributor for this size range by demonstrating thro…

Investigating New Physics through the Observables of Semileptonic $B_{s}\to K^{\ast}(\to K \pi)\mu^{ }\mu^{-}$ Decay
Zohaib Aarfi, Qazi Maaz Us Salam, Ishtiaq Ahmed, Faisal Munir Bhutta, Rizwan Khalid, M. Ali Paracha
https://arxiv.org/abs/2506.20446

Investigating New Physics through the Observables of Semileptonic $B_{s}\to K^{\ast}(\to K π)μ^{+}μ^{-}$ Decay
The rare four-fold decay $B_s \to K^*(\to Kπ)μ^+μ^- $, governed by the flavor-changing neutral current transition $b \to dμ^+μ^-$, provides a sensitive probe for testing the Standard Model (SM) and investigating signatures of new physics (NP). This work presents a comprehensive model-independent analysis of the decay using the framework of the weak effective field theory. We compute a set of key physical observables, including the differential branching ratio, forward-backward asymmetry, l…