Tootfinder

Tim Hardin - "Suite for Susan Moore and Damion - We Are - One, One, All In One" (1969)
The high lonesome sounds combined with all the family photos scream "She's left me". What a way to end the 60s.
#NowPlaying #TimHardin

On the D-finiteness of generating functions counting small steps walks in the quadrant
Charlotte Hardouin
https://arxiv.org/abs/2509.22464 https://arxiv.or…

On the D-finiteness of generating functions counting small steps walks in the quadrant
The enumeration of small steps walks confined to the first quadrant of the plane has attracted a lot of attention over the past fifteen years. The associated generating functions are trivariate formal power series in $x,y,t$ where the parameter $t$ encodes the length of the walk while the variables $x,y$ correspond to the coordinates of its ending point. These functions satisfy a functional equation in two catalytic variables. Bousquet-Mélou and Mishna have associated to any small steps mode…

An Improved Quantum Algorithm for 3-Tuple Lattice Sieving
Lynn Engelberts, Yanlin Chen, Amin Shiraz Gilani, Maya-Iggy van Hoof, Stacey Jeffery, Ronald de Wolf
https://arxiv.org/abs/2510.08473

An Improved Quantum Algorithm for 3-Tuple Lattice Sieving
The assumed hardness of the Shortest Vector Problem in high-dimensional lattices is one of the cornerstones of post-quantum cryptography. The fastest known heuristic attacks on SVP are via so-called sieving methods. While these still take exponential time in the dimension $d$, they are significantly faster than non-heuristic approaches and their heuristic assumptions are verified by extensive experiments. $k$-Tuple sieving is an iterative method where each iteration takes as input a large numbe…

Evaluating Spatiotemporal Consistency in Automatically Generated Sewing Instructions
Luisa Geiger, Mareike Hartmann, Michael Sullivan, Alexander Koller
https://arxiv.org/abs/2509.24792

Evaluating Spatiotemporal Consistency in Automatically Generated Sewing Instructions
In this paper, we propose a novel, automatic tree-based evaluation metric for LLM-generated step-by-step assembly instructions, that more accurately reflects spatiotemporal aspects of construction than traditional metrics such as BLEU and BERT similarity scores. We apply our proposed metric to the domain of sewing instructions, and show that our metric better correlates with manually-annotated error counts as well as human quality ratings, demonstrating our metric's superiority for evaluating t…

Windmilling clusters of active quadrupoles
Margaret Rosenberg, Hartmut L\"owen
https://arxiv.org/abs/2509.26369 https://arxiv.org/pdf/2509.26369

Windmilling clusters of active quadrupoles
Active matter has thrived in recent years, driven both by the insight that it underlies fundamental processes in nature, and by its vast potential for applications. This allows for innovation both inspired by experimental observations, and by construction of novel systems with desired properties. In this paper, we develop a novel system in the search for a new kind of pattern formation: microstructural motifs with orthogonal alignment. Taking a simple active Brownian particle (ABP) model applie…

Quantum spin Hall effect in III-V semiconductors at elevated temperatures: advancing topological electronics
Manuel Meyer, Jonas Baumbach, Sergey Krishtopenko, Adriana Wolf, Monika Emmerling, Sebastian Schmid, Martin Kamp, Benoit Jouault, Jean-Baptiste Rodriguez, Eric Tournie, Tobias M\"uller, Ronny Thomale, Gerald Bastard, Frederic Teppe, Fabian Hartmann, Sven H\"ofling

Quantum spin Hall effect in III-V semiconductors at elevated temperatures: advancing topological electronics
The quantum spin Hall effect (QSHE), a hallmark of topological insulators, enables dissipationless, spin-polarized edge transport and has been predicted in various two-dimensional materials. However, challenges such as limited scalability, low-temperature operation, and the lack of robust electronic transport have hindered practical implementations. Here, we demonstrate the QSHE in an InAs/GaInSb/InAs trilayer quantum well structure operating at elevated temperatures. This platform meets key cr…

Characterizing Timing Parameters in Commercial SERF-OPM Multichannel Systems for Biomagnetic Field Sensing
Eric Elzenheimer, Hartmut Matz, Jan Zerfowski, Paul Anders, Michael H\"oft, Robert Rieger, Surjo R. Soekadar, Stephen Robinson, Silvia Knappe-Gr\"uneberg
https://arxiv.org/abs/2509.22198…

Characterizing Timing Parameters in Commercial SERF-OPM Multichannel Systems for Biomagnetic Field Sensing
Spin-Exchange Relaxation-Free Optically Pumped Magnetometers (SERF-OPMs) are increasingly used in multichannel biomagnetic sensing, yet their timing performance remains poorly characterized. This contribution presents the first cross-platform study of time delay, group delay, intra-channel variability, and settling time across four commercial SERF-OPM systems: Neuro-1 and QZFM Gen.2 (QuSpin Inc.), and HEDscan and FLv2 (FieldLine Inc.). Measurements were performed inside a magnetically shielded …