Tootfinder

One of the best things about the @… meeting is the chance to connect with experts in different but related fields. Dinner this evening covered low level jets, atmospheric rivers, carbon cycling by biological processes in the southern ocean, permafrost decay and vegetation processes in the Arctic and how wildfires will spread in the future.
We are a very diverse group.
Brain full, it's time to sleep

Lattice Mismatch Driven In Plane Strain Engineering for Enhanced Upper Critical Fields in Mo2N Superconducting Thin Films
Aditya Singh, Divya Rawat, Victor Hjort, Abhisek Mishra, Arnaud le Febvrier, Subhankar Bedanta, Per Eklund, Ajay Soni
https://arxiv.org/abs/2506.04750

Lattice Mismatch Driven In Plane Strain Engineering for Enhanced Upper Critical Fields in Mo2N Superconducting Thin Films
Transition metal nitrides are a fascinating class of hard coating material that provide an excellent platform for investigating superconductivity and fundamental electron phonon interactions. In this work the structural morphological and superconducting properties have been studied for Mo2N thin films deposited via direct current magnetron sputtering on cplane Al2O3 and MgO substrates to elucidate the effect of internal strain on superconducting properties. High resolution X Ray diffraction and…

Taking advantage of multiple scattering for Optical Reflection Tomography
Thomas Wasik, Victor Barolle, Alexandre Aubry, Josselin Garnier
https://arxiv.org/abs/2506.04232

Taking advantage of multiple scattering for Optical Reflection Tomography
Optical Diffraction Tomography (ODT) is a powerful non-invasive imaging technique widely used in biological and medical applications. While significant progress has been made in transmission configuration, reflection ODT remains challenging due to the ill-posed nature of the inverse problem. We present a novel optimization algorithm for 3D refractive index (RI) reconstruction in reflection-mode microscopy. Our method takes advantage of the multiply-scattered waves that are reflected by uncontro…

The Roman View of Strong Gravitational Lenses
Bryce Wedig, Tansu Daylan, Simon Birrer, Francis-Yan Cyr-Racine, Cora Dvorkin, Douglas P. Finkbeiner, Alan Huang, Xiaosheng Huang, Rahul Karthik, Narayan Khadka, Priyamvada Natarajan, Anna M. Nierenberg, Annika H. G. Peter, Justin D. R. Pierel, Xianzhe TZ Tang, Risa H. Wechsler
https://

The Roman View of Strong Gravitational Lenses
Galaxy-galaxy strong gravitational lenses can constrain dark matter models and the Lambda Cold Dark Matter cosmological paradigm at sub-galactic scales. Currently, there is a dearth of images of these rare systems with high signal-to-noise and angular resolution. The Nancy Grace Roman Space Telescope (hereafter, Roman), scheduled for launch in late 2026, will play a transformative role in strong lensing science with its planned wide-field surveys. With its remarkable 0.281 square degree field o…

Eye of the vortex: bound spectra in tunable horizonless rotational analogs
H. S. Vieira, Kyriakos Destounis
https://arxiv.org/abs/2506.03451 https://

Eye of the vortex: bound spectra in tunable horizonless rotational analogs
Analog gravity experiments are making remarkable strides in unveiling both the classical and quantum nature of black holes. By harnessing diverse states of matter, contemporary tabletop setups now replicate strong-field phenomena typically confined to the enigmatic regions surrounding black holes. Through these modern gravity simulators, physical processes once considered elusive may finally be brought into experimental reach. In this work, we investigate the bound spectrum of massless scalar e…

This https://arxiv.org/abs/2410.01050 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csRO_…

Steering Elongate Multi-legged Robots By Modulating Body Undulation Waves
Centipedes exhibit great maneuverability in diverse environments due to their many legs and body-driven control. By leveraging similar morphologies and control strategies, their robotic counterparts also demonstrate effective terrestrial locomotion. However, the success of these multi-legged robots is largely limited to forward locomotion; steering is substantially less studied, in part because of the difficulty in coordinating a high degree-of-freedom robot to follow predictable, planar trajec…

Tug-of-war between idiom's figurative and literal meanings in LLMs
Soyoung Oh, Xinting Huang, Mathis Pink, Michael Hahn, Vera Demberg
https://arxiv.org/abs/2506.01723

Tug-of-war between idiom's figurative and literal meanings in LLMs
Idioms present a unique challenge for language models due to their non-compositional figurative meanings, which often strongly diverge from the idiom's literal interpretation. This duality requires a model to learn representing and deciding between the two meanings to interpret an idiom in a figurative sense, or literally. In this paper, we employ tools from mechanistic interpretability to trace how a large pretrained causal transformer (LLama3.2-1B-base) deals with this ambiguity. We localize …

#Sonnenstürme verkürzen die Lebensdauer von #Starlink-Satelliten und lassen sie schneller zur Erde zurückkehren.
Durch erhöhte #Atmosphärendichte steigt der Luftwiderstan…

Tracking Reentries of Starlink Satellites During the Rising Phase of Solar Cycle 25
The exponential increase of low-Earth orbit (LEO) satellites in the past 5 years has brought into intense focus the need for reliable monitoring and reentry prediction to safeguard from space collisions and ground debris impacts. However, LEO satellites fly within the upper atmosphere region that exerts significant drag forces to their orbits, reducing their lifetimes, and increasing collision risks during dynamic events, like geomagnetic storms. Such conditions can become more severe during ge…

Optimal Bregman quantization : existence and uniqueness of optimal quantizers revisited
Guillaume Boutoille, Gilles Pag\`es
https://arxiv.org/abs/2506.01746

Optimal Bregman quantization : existence and uniqueness of optimal quantizers revisited
In this paper we revisit the exsistence theorem for $L^r$-optimal quantization, $r\ge 2$, with respect to a Bregman divergence: we establish the existence of optimal quantizaers under lighter assumptions onthe strictly convex function which generates the divergence, espcially in the quadratic case ($r=2$). We then prove a uniqueness theorem ``à la Trushkin'' in one dimension for strongly unimodal distributions and divergences gerated by strictly convex functions whiose thire dervative is eithe…

Uplifting, Depressing, and Tilting Dark Energy
Eric V. Linder
https://arxiv.org/abs/2506.02122 https://arxiv.org/pdf/2506.02122

Uplifting, Depressing, and Tilting Dark Energy
Current data in the form of baryon acoustic oscillation, supernova, and cosmic microwave background distances prefer a cosmology that accelerates more strongly than $Λ$CDM at $z\approx0.5-1.5$, and more weakly at $z\lesssim0.5$. We examine dark energy physics that can accommodate this, showing that interactions (decays, coupling to matter, nonminimal coupling to gravity) fairly generically tend not to give a satisfactory solution (in terms of fitting both distances and growth) even if they ena…