Tootfinder

Atomic diffraction by patterned holes in hexagonal boron nitride: a comparison between semi-classical and quantum computational models
Eivind Kristen Osestad, Ekaterina Zossimova, Michael Walter, Johannes Fiedler
https://arxiv.org/abs/2509.08336

Atomic diffraction by patterned holes in hexagonal boron nitride: a comparison between semi-classical and quantum computational models
The diffraction of atoms and molecules through tiny, sub-nanometre holes in atomically thin membranes is a promising approach for advancing atom interferometry sensing and atomic holography. However, dispersion interactions, such as the Casimir-Polder force, pose a significant challenge by attracting diffracting particles to the membrane, limiting the minimum hole size. This paper presents a numerical simulation of helium matter-wave diffraction through sub-nanometre holes in hexagonal boron ni…

Building High-Quality Datasets for Portuguese LLMs: From Common Crawl Snapshots to Industrial-Grade Corpora
Thales Sales Almeida, Rodrigo Nogueira, Helio Pedrini
https://arxiv.org/abs/2509.08824

Building High-Quality Datasets for Portuguese LLMs: From Common Crawl Snapshots to Industrial-Grade Corpora
The performance of large language models (LLMs) is deeply influenced by the quality and composition of their training data. While much of the existing work has centered on English, there remains a gap in understanding how to construct effective training corpora for other languages. We explore scalable methods for building web-based corpora for LLMs. We apply them to build a new 120B token corpus in Portuguese that achieves competitive results to an industrial-grade corpus. Using a continual pre…

HYLU: Hybrid Parallel Sparse LU Factorization
Xiaoming Chen
https://arxiv.org/abs/2509.07690 https://arxiv.org/pdf/2509.07690

HYLU: Hybrid Parallel Sparse LU Factorization
This article introduces HYLU, a hybrid parallel LU factorization-based general-purpose solver designed for efficiently solving sparse linear systems (Ax=b) on multi-core shared-memory architectures. The key technical feature of HYLU is the integration of hybrid numerical kernels so that it can adapt to various sparsity patterns of coefficient matrices. Tests on 34 sparse matrices from SuiteSparse Matrix Collection reveal that HYLU outperforms Intel MKL PARDISO in the numerical factorization pha…

Round Aztec windows, a dual of the Aztec diamond theorem and a curious symmetry of the correlation of diagonal slits
Mihai Ciucu
https://arxiv.org/abs/2508.06451 https://…

Round Aztec windows, a dual of the Aztec diamond theorem and a curious symmetry of the correlation of diagonal slits
Fairly shortly after the publication of the Aztec diamond theorem of Elkies, Kuperberg, Larsen and Propp in 1992, interest arose in finding the number of domino tilings of an Aztec diamond with an ``Aztec window,'' i.e.\ a hole in the shape of a smaller Aztec diamond at its center. Several intriguing patterns were discovered for the number of tilings of such regions, but the numbers themselves were not ``round'' -- they didn't seem to be given by a simple product formula. In this paper we consi…

Automated Spectroscopic Wavelength Calibration using Dynamic Time Warping
James R. A. Davenport, Francisca Chabour Barra, K. Azalee Bostroem, Sarah Tuttle, Josue Torres, Jessica Birky, Anastasios Tzanidakis, Kal Kadlec, Yuankun Wang, Suzanne L. Hawley, Trevor Z. Dorn-Wallenstein, William Ketzeback, Julene Elias, Abdullah Korra, Anna Panova, Kathryn Devine, Kevin R. Covey

Automated Spectroscopic Wavelength Calibration using Dynamic Time Warping
Here we present an automated method for obtaining wavelength calibrations for one-dimensional spectra, using Dynamic Time Warping (DTW). DTW is a flexible and well-understood algorithm for pattern matching, which has not been widely used in astronomy data analysis. Employing a calibrated template spectrum as a reference, DTW can recover non-linear and even discontinuous dispersion solutions without an initial guess. The algorithm is robust against differing spectral resolution between the templ…

"Waarom is van der Burg woordvoerder buitenlandse zaken en niet woordvoerder van de binnenvaart? Want het maakt kennelijk toch allemaal niks uit".
Aldus Paternotte.
Van Der Burg is not amused en moppert iets over grappen die niet op z'n plek zijn.
Maar Paternotte heeft wel een punt: bij Oekraine neemt de VVD *wel* het voortouw, dan kunnen we heel veel, maar bij Gaza zijn we ineens een hulpeloos klein landje.

Urban Plantations ? 🟩
都市植被？🟩
📷 Pentax MX
🎞️Ilford FP4 Plus, expired 1994
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

going through my months-old screenshots and this motherfucker is a recurring pattern

i guess i have skills

Focused Ion Beam patterning of MnSb(1-101) based spintronic devcies
Stuart N. Holmes, Jonathan Gough, Ethan Dommett, Gavin R. Bell
https://arxiv.org/abs/2508.01838 https://

Focused Ion Beam patterning of MnSb(1-101) based spintronic devcies
Low temperature transport measurements are presented of ferromagnetic MnSb devices with the magnetic properties patterned using a Ga focused ion beam FIB system at 30 keV. FIB patterning introduces disorder and this is quantified in this paper through measurements of the longitudinal resistivity and the anomalous Hall effect contribution to the Hall conductivity. The MnSb structural phase is the niccolite phase with a surface state in addition to bulk states. FIB doses up to 1E16 Ga ions per sq…