Tootfinder

As usual we watched the "Stoertebekker" stage play at Ralswiek on Rügen Island. The stage setups and wardrobes were as awesome as always. They really try to improve on that every year and come up with clever mechanisms to transform the building for the various acts of the play. The script this year left room for desire ;) Nevertheless a happing worth attending
htt…

me and who

Graffitti along the road downhill from Bertinoro castle taken while coming back from the daily morning run. Love & passion ;-)
#isws2025 #running #summerschool

I rarely leave my neighborhood these days, so when the opportunity came last weekend to visit a town about 80 km from my home, I took a little detour to visit and take photos of the town’s only national historical marker.
(Those who have been following me long enough know that documenting historical markers in #Wikidata and

Landing at Nasugbu historical marker
NHI historical marker for the landing of the American forces at Nasugbu during World War II

Direct laser ablation of 2D material films for fabricating multi-functional flexible and transparent devices
Yigit Sozen, Yu Kyoung Ryu, Javier Martinez, Andres Castellanos-Gomez
https://arxiv.org/abs/2506.03730

Direct laser ablation of 2D material films for fabricating multi-functional flexible and transparent devices
We present a scalable method for direct patterning of graphite and transition metal dichalcogenide (TMD) films on polycarbonate (PC) and other transparent substrates using fiber laser ablation. This process facilitates the fabrication of various functional devices, including strain gauges, supercapacitors, and photodetector arrays, without the need for photolithography or solvents, thereby simplifying device production and enhancing environmental sustainability. Utilizing roll-to-roll mechanica…

Optimized and regularly repeated lattice-based Latin hypercube designs for large-scale computer experiments
Xu He, Junpeng Gong, Zhaohui Li
https://arxiv.org/abs/2506.04582

Optimized and regularly repeated lattice-based Latin hypercube designs for large-scale computer experiments
Computer simulations serve as powerful tools for scientists and engineers to gain insights into complex systems. Less costly than physical experiments, computer experiments sometimes involve large number of trials. Conventional design optimization and model fitting methods for computer experiments are inefficient for large-scale problems. In this paper, we propose new methods to optimize good lattice point sets, using less computation to construct designs with enhanced space-filling properties …

Enhanced performance in quasi-isodynamic max-$J$ stellarators with a turbulent particle pinch
G. G. Plunk, A. G. Goodman, P. Xanthopoulos, P. Costello, H. M. Smith, K. Aleynikova, C. D. Beidler, M. Drevlak, P. Helander
https://arxiv.org/abs/2507.19319

Enhanced performance in quasi-isodynamic max-$J$ stellarators with a turbulent particle pinch
Recent stellarator reactor designs demonstrate mostly outward turbulent particle transport, which, without advanced fueling technology, inhibits the formation of density gradients needed for confinement. We introduce ``SQuID-$τ$'', a self-fueling quasi-isodynamic stellarator capable of sustaining density peaking through inward particle transport caused by turbulence. Temperature and density profile predictions based on high-fidelity gyrokinetic simulations demonstrate enhanced performance, sig…

Quantum Boltzmann Machines using Parallel Annealing for Medical Image Classification
Dani\"elle Schuman, Mark V. Seebode, Tobias Rohe, Maximilian Balthasar Mansky, Michael Schroedl-Baumann, Jonas Stein, Claudia Linnhoff-Popien, Florian Krellner
https://arxiv.org/abs/2507.14116

Quantum Boltzmann Machines using Parallel Annealing for Medical Image Classification
Exploiting the fact that samples drawn from a quantum annealer inherently follow a Boltzmann-like distribution, annealing-based Quantum Boltzmann Machines (QBMs) have gained increasing popularity in the quantum research community. While they harbor great promises for quantum speed-up, their usage currently stays a costly endeavor, as large amounts of QPU time are required to train them. This limits their applicability in the NISQ era. Following the idea of Noè et al. (2024), who tried to allev…

On the PI-exponent of matrix algebras and algebras with generalized actions
Thiago Castilho de Mello, Felipe Yukihide Yasumura
https://arxiv.org/abs/2506.21257

On the PI-exponent of matrix algebras and algebras with generalized actions
We compute the PI-exponent of the matrix ring with coefficients in an associative algebra. As a consequence, we prove the following. Let $\mathcal{R}$ be a PI-algebra with a positive PI-exponent. If $M_n(\mathcal{R})$ and $M_m(\mathcal{R})$ satisfy the same set of polynomial identities then $n=m$. We provide examples where this result fails if either $\mathcal{R}$ is not PI or has zero exponent. We obtain the same statement for certain finite-dimensional algebras with generalized action over an…

Room-Temperature Surface Exciton Polaritons in Colloidal J-Aggregate Flakes
Carla Est\'evez-Varela, Jos\'e Nuno Gama, Miguel Castillo, Adelaide Miranda, Pieter De Beule, Jorge P\'erez-Juste, Martin Lopez-Garcia, Isabel Pastoriza-Santos, Sara N\'u\~nez-S\'anchez
https://arxiv.org/abs/2507.13784

Room-Temperature Surface Exciton Polaritons in Colloidal J-Aggregate Flakes
J-aggregates are promising organic materials for nanophotonic applications due to their excitonic properties and ability to support surface exciton polaritons at room temperature, providing a robust platform for nanoscale light manipulation. While thin films composed of J-aggregates have demonstrated these advantages, colloidal J-aggregate nanoparticles remain underexplored. Herein, we report the synthesis of colloidal J-aggregate flakes by electrostatic interaction of cyanine molecules (TDBC) …