Tootfinder

Das ist ja fast beleidigend, dass jetzt ausgerechnet die Grünen wegen Polizei-kritischer Bekleidung einen Skandal im Bundestag haben. Hunderte Linke fühlen sich schon wieder nicht gesehen.
https://www.

This https://arxiv.org/abs/2505.23718 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csCC_…

Fast Compressed-Domain N-Point Discrete Fourier Transform
This paper presents a novel algorithm for computing the N-point Discrete Fourier Transform (DFT) based solely on recursive Rectangular Index Compression (RIC) [1][2] and structured frequency shifts. The RIC DFT algorithm compresses a signal from $N=CL$ to $C\in[2,N/2]$ points at the expense of $N-1$ complex additions and no complex multiplication. It is shown that a $C$-point DFT on the compressed signal corresponds exactly to $C$ DFT coefficients of the original $N$-point DFT, namely, $X_{kL}$…

A look at Russian GRU Unit 29155's hacking department, which started out in 2012, and its involvement in cyber warfare and disinformation campaigns (The Insider)
https://theins.press/en/inv/281731

Hidden Bear: The GRU hackers of Russia’s most notorious kill squad
Russian GRU Unit 29155 is best known for its long list of murder and sabotage ops, which include the Salisbury poisonings in England, arms depot explosions in Czechia, and an attempted coup d’etat in Montenegro. But its activities in cyberspace remained in the shadows — until now. After reviewing a trove of hidden data, The Insider can report that the Kremlin’s most notorious black ops squad also fielded a team of hackers — one that attempted to destabilize Ukraine in the months before …

Love this, by D.J. Grothe
We are truly only just getting started. All we have to do is to fail to kill everyone, and things will get better.
"Human civilization has existed for only 3% of the time that anatomically modern humans have existed. And modern industrial civilization has existed for just 2% of that 3% — just 0.06% of the time that anatomically modern humans have existed. Maybe we’re just getting started!"

The exchange-correlation dipole moment dispersion method
Kyle R Bryenton, Erin R Johnson
https://arxiv.org/abs/2506.02352 https://arx…

The exchange-correlation dipole moment dispersion method
Density-functional theory (DFT) has become the workhorse of modern computational chemistry, with dispersion corrections such as the exchange-hole dipole moment (XDM) model playing a key role in high-accuracy modelling of large-scale systems. Here, we introduce a new physics-guided XDM variant, termed the exchange-correlation dipole moment (XCDM) model, which supplements XDM with same- and opposite-spin dynamical correlation terms, substantially improving accuracy for molecular $C_6$ dispersion …

Bias-field-free operation of nitrogen-vacancy ensembles in diamond for accurate vector magnetometry
Lilian Childress, Vincent Halde, Kayla Johnson, Andrew Lowther, David Roy-Guay, Romain Ruhlmann, Adrian Solyom
https://arxiv.org/abs/2505.24574

Bias-field-free operation of nitrogen-vacancy ensembles in diamond for accurate vector magnetometry
Accurate measurement of vector magnetic fields is critical for applications including navigation, geoscience, and space exploration. Nitrogen-vacancy (NV) center spin ensembles offer a promising solution for high-sensitivity vector magnetometry, as their different orientations in the diamond lattice measure different components of the magnetic field. However, the bias magnetic field typically used to separate signals from each NV orientation introduces inaccuracy from drifts in permanent magnet…

Fast Compressed-Domain N-Point Discrete Fourier Transform
Saulo Queiroz
https://arxiv.org/abs/2505.23718 https://arxiv.org/pdf/2505.2…

Fast Compressed-Domain N-Point Discrete Fourier Transform
This paper presents a novel algorithm for computing the N-point Discrete Fourier Transform (DFT) based solely on recursive Rectangular Index Compression (RIC) [1][2] and structured frequency shifts. The RIC DFT algorithm compresses a signal from $N=CL$ to $C\in[2,N/2]$ points at the expense of $N-1$ complex additions and no complex multiplication. It is shown that a $C$-point DFT on the compressed signal corresponds exactly to $C$ DFT coefficients of the original $N$-point DFT, namely, $X_{kL}$…

This https://arxiv.org/abs/2412.04265 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_eco…

On Extrapolation of Treatment Effects in Multiple-Cutoff Regression Discontinuity Designs
Regression discontinuity (RD) designs typically identify the treatment effect at a single cutoff point, which may not always be the primary interest. When and how, then, can we learn about treatment effects away from the cutoff? This paper addresses this question within a multiple-cutoff RD framework. We begin by examining the plausibility of the constant bias assumption proposed by Cattaneo, Keele, Titiunik, and Vazquez-Bare (2021) through the lens of rational decision-making behavior. We argu…