Tootfinder

Concept of the UCN Source at the WWR-K Reactor (AlSUN)
Sayabek Sakhiyev, Kylyshbek Turlybekuly, Asset Shaimerdenov, Darkhan Sairanbayev, Avganbek Sabidolda, Zhanibek, Kurmanaliyev, Akzhol Almukhametov, Olzhas Bayakhmetov, Ruslan Kiryanov, Ekaterina Korobkina, Egor Lychagin, Alexey Muzychka, Valery Nesvizhevsky, Cole Teander, Pham Khac Tuyen
https:/…

Concept of the UCN Source at the WWR-K Reactor (AlSUN)
We present the concept of the ultracold neutron (UCN) source with a superfluid helium-4 converter located in the thermal column of the WWR-K research reactor at the Institute of Nuclear Physics (INP) in Almaty, Kazakhstan. The conceptual design is based on the idea of accumulating UCNs in the source and effectively transporting them to experimental setups. We propose to improve the UCN density in the source by separating the heat and the UCN flows from the production volume and decreasing both,…

Kash Patel testified before the Senate Judiciary Committee on Tuesday and then before the House Judiciary Committee on Wednesday.
He faced a tense grilling on several topics,
including the investigationinto the files of accused sex trafficker Jeffrey Epstein, the killing of conservative activist Charlie Kirk, and other internal FBI matters.
A Getty photograph shared on X by independent journalist Aaron Rupar showed what was on Patel's mind during his hearing with Hous…

'Clown': Kash Patel mocked over photo of his 'cringey' handwritten House hearing notes
A photographer's quick snap of FBI Director Kash Patel's handwritten notes during a contentious House hearing this week earned scorn from social media critics. Patel testified this week before the Senate Judiciary Committee on Tuesday and then before the House Judiciary Committee on Wednesday. He fa...

Federated Learning in the Wild: A Comparative Study for Cybersecurity under Non-IID and Unbalanced Settings
Roberto Doriguzzi-Corin, Petr Sabel, Silvio Cretti, Silvio Ranise
https://arxiv.org/abs/2509.17836

Federated Learning in the Wild: A Comparative Study for Cybersecurity under Non-IID and Unbalanced Settings
Machine Learning (ML) techniques have shown strong potential for network traffic analysis; however, their effectiveness depends on access to representative, up-to-date datasets, which is limited in cybersecurity due to privacy and data-sharing restrictions. To address this challenge, Federated Learning (FL) has recently emerged as a novel paradigm that enables collaborative training of ML models across multiple clients while ensuring that sensitive data remains local. Nevertheless, Federated Av…

On the Effective Non-vanishing of Hecke--Maass $L$-functions at Special Points
Zhi Qi
https://arxiv.org/abs/2507.14566 https://arxiv.…

On the Effective Non-vanishing of Hecke--Maass $L$-functions at Special Points
In this paper, we consider the non-vanishing problem for the family of special Hecke--Maass $L$-values $ L (1/2+it_f, f) $ with $f (z)$ in an orthonormal basis of (even or odd) Hecke--Maass cusp forms of Laplace eigenvalue $1/4 + t_f^2$ ($t_f > 0$). We prove that 33% of $L (1/2+it_f, f)$ for $ t_f \leqslant T$ do not vanish as $T \rightarrow \infty$. For comparison, it is known that the non-vanishing proportion is at least 25% for the central $L$-values $L (1/2, f)$. Further, 33% may be raised …

Beyond Fresnel Wave Surfaces: Off-Shell Photonic Density of States and Near-Fields in Isotropy-Broken Materials with Loss or Gain
Maxim Durach, David Keene
https://arxiv.org/abs/2509.17320

Beyond Fresnel Wave Surfaces: Off-Shell Photonic Density of States and Near-Fields in Isotropy-Broken Materials with Loss or Gain
Fresnel wave surfaces, or isofrequency light shells, provide a powerful framework for describing electromagnetic wave propagation in anisotropic media, yet their applicability is restricted to reciprocal, lossless materials and far-field radiation. This paper extends the concept by incorporating near-field effects and non-Hermitian responses arising in media with loss, gain, or non-reciprocity. Using the Om-potential approach to macroscopic electromagnetism, we reinterpret near fields as off-sh…

I also wrote up a post about biking to work! I definitely want to do this more. Kind of bummed I need to drive tomorrow as I have some errands to run after work (and have to bring home a 27" monitor) but I'll bike into work again this coming week!
https://rasterweb.net/raster/2025/08/1

I eBiked to Work!
And I wasn't totally sweaty...

Goldstone bosons across thermal phase transitions
Peter Lowdon, Owe Philipsen
https://arxiv.org/abs/2507.14348 https://arxiv.org/pdf/…

Goldstone bosons across thermal phase transitions
Temperature has a significant effect on the properties of quantum field theories (QFTs) with a spontaneously broken symmetry, in particular on the massless Goldstone bosons that exist in the vacuum state. It has recently been shown using lattice calculations for a $\mathrm{U}(1)$ complex scalar field theory that the Goldstone mode persists even when the symmetry is restored above the critical temperature $T_{c}$, and has the properties of a screened massless excitation, a so-called thermopartic…

Optimizing electrical stimulation parameters to enhance visual cortex activation in retina degeneration rats #BCI

Optimizing electrical stimulation parameters to enhance visual cortex activation in retina degeneration rats - Scientific Reports
In patients with degenerative retinal diseases such as retinitis pigmentosa and age-related macular degeneration, retinal prostheses offer a promising approach to restoring partial vision. Among these, epiretinal prostheses have shown encouraging preliminary clinical efficacy; however, optimizing stimulation parameters remains essential for improving efficiency and reducing power consumption. In this study, we investigated the effects of key electrical stimulation parameters— phase duration, …

Efficient Difference-in-Differences and Event Study Estimators
Xiaohong Chen, Pedro H. C. Sant'Anna, Haitian Xie
https://arxiv.org/abs/2506.17729 https…

Efficient Difference-in-Differences and Event Study Estimators
This paper investigates efficient Difference-in-Differences (DiD) and Event Study (ES) estimation using short panel data sets within the heterogeneous treatment effect framework, free from parametric functional form assumptions and allowing for variation in treatment timing. We provide an equivalent characterization of the DiD potential outcome model using sequential conditional moment restrictions on observables, which shows that the DiD identification assumptions typically imply nonparametric…

JD Vance vows retribution on liberal institutions after Charlie Kirk killing
Vice President JD Vance vowed to dismantle institutions on the left that he said promote violence and terrorism,
denouncing two of the country’s most prominent liberal foundations in the aftermath of the fatal shooting of conservative activist Charlie Kirk.

Donald Trump later in the day also attacked groups on the left and renewed his talk about potential racketeering prosecutions of unspecified g…

JD Vance vows retribution on liberal institutions after Charlie Kirk killing
Vice President JD Vance hosted Charlie Kirk’s podcast as he mourns his friend and potentially cements his position as the heir to the political movement built by Kirk, a powerful GOP force.