Tootfinder

Log-Euclidean Frameworks for Smooth Brain Connectivity Trajectories
Olivier Bisson (EPIONE, UniCA), Yanis Aeschlimann (CRONOS, UniCA), Samuel Deslauriers-Gauthier (CRONOS, UniCA), Xavier Pennec (EPIONE, UniCA)
https://arxiv.org/abs/2507.15374

Log-Euclidean Frameworks for Smooth Brain Connectivity Trajectories
The brain is often studied from a network perspective, where functional activity is assessed using functional Magnetic Resonance Imaging (fMRI) to estimate connectivity between predefined neuronal regions. Functional connectivity can be represented by correlation matrices computed over time, where each matrix captures the Pearson correlation between the mean fMRI signals of different regions within a sliding window. We introduce several Log-Euclidean Riemannian framework for constructing smooth…

Resurgence of CO in a warm bubble around accreting protoplanets and its observability
O. Chrenko, S. Casassus, R. O. Chametla
https://arxiv.org/abs/2507.03370

Resurgence of CO in a warm bubble around accreting protoplanets and its observability
The cold outer regions of protoplanetary disks are expected to contain a midplane-centered layer in which gas-phase CO molecules freeze-out and their overall abundance is low. The layer then manifests itself as a void in the channel maps of CO rotational emission lines. We explore whether the frozen-out layer can expose the circumplanetary environment of embedded accreting protoplanets to observations. To this end, we performed 3D radiative gas-dust hydrodynamic simulations, directly linking op…

Optimal Control of Reserve Asset Portfolios for Pegged Digital Currencies
Alexander Hammerl, Georg Beyschlag
https://arxiv.org/abs/2508.09429 https://arxiv…

Optimal Control of Reserve Asset Portfolios for Pegged Digital Currencies
Stablecoins promise par convertibility, yet issuers must balance immediate liquidity against yield on reserves to keep the peg credible. We study this treasury problem as a continuous-time control task with two instruments: reallocating reserves between cash and short-duration government bills, and setting a spread fee for either minting or burning the coin. Mint and redemption flows follow mutually exciting processes that reproduce clustered order flow; peg deviations arise when redemptions ex…

MIRAC-5 on the MMT with MAPS: annular groove phase mask N-band coronagraphic upgrade
Alyssa L. Miller, Jarron Leisenring, Michael Meyer, Gilles Orban De Xivry, Olivier Absil, Rory Bowens, Christian Delacroix, Olivier Durney, Pontus Forsberg, Bill Hoffmann, Mikael Karlsson, John D. Monnier, Manny Montoya, Katie Morzinski, Eric Pantin, Samuel Ronayette, Taylor L. Tobin, Grant West

MIRAC-5 on the MMT with MAPS: annular groove phase mask N-band coronagraphic upgrade
We describe the coronagraphic upgrade underway for the Mid-Infrared Array Camera-5 (MIRAC-5) to be used with the 6.5-m MMT telescope utilizing the new MMT Adaptive optics exoPlanet characterization System (MAPS). Mid-IR ground-based coronagraphic adaptive-optics-assisted imaging can be a powerful tool for characterizing exoplanet atmospheres and studying protoplanets in formation within circumstellar disks around young stars. In addition to enabling ground-based observations of bright targets i…

The portable aircon unit is struggling to get the home office below 27°C this morning. I don't know why as the end of the hose that's out the window is belching out lots of hot air, and the front is blowing out cold.
I turned it on just before 7am and cranked it to full around 8.30 as it wasn't doing much.
Outside it's 33.6°C.

Variations in Dominant Wave Period in the Solar Atmosphere
Pradeep Kayshap, K. Murawski, Z. E. Musielak, Suresh Babu
https://arxiv.org/abs/2506.07493 https…

Variations in Dominant Wave Period in the Solar Atmosphere
Waves are an integral part of the solar atmosphere, and their characteristics (e.g., dominant period, range of periods, power, and phase angle) change on a diverse spatio-temporal scale. It is well well-established observationally that the dominant periods of solar oscillations are 5-min and 3-min in the photosphere and chromosphere, respectively. This shows that the wave spectra and their dominant periods evolve between these two layers. We present observational results that demonstrate variat…

Flow-Aware Diffusion for Real-Time VR Restoration: Enhancing Spatiotemporal Coherence and Efficiency
Yitong Zhu, Guanxuan Jiang, Zhuowen Liang, Yuyang Wang
https://arxiv.org/abs/2506.18786

Flow-Aware Diffusion for Real-Time VR Restoration: Enhancing Spatiotemporal Coherence and Efficiency
Cybersickness remains a critical barrier to the widespread adoption of Virtual Reality (VR), particularly in scenarios involving intense or artificial motion cues. Among the key contributors is excessive optical flow-perceived visual motion that, when unmatched by vestibular input, leads to sensory conflict and discomfort. While previous efforts have explored geometric or hardware based mitigation strategies, such methods often rely on predefined scene structures, manual tuning, or intrusive eq…

Multi dust species inner rim in magnetized protoplanetary disks
Mario Flock, Ond\v{r}ej Chrenko, Takahiro Ueda, Myriam Benisty, Jozsef Varga, Roy van Boekel
https://arxiv.org/abs/2508.04254

Multi dust species inner rim in magnetized protoplanetary disks
The inner regions of protoplanetary disks, within ten astronomical units, are where terrestrial planets are born. By developing a new class of multi-dust radiative magnetized inner rim models, we can gain valuable insights into the conditions during planet formation. Our goal is twofold: to study the influence of highly refractory dust species on the inner rim shape and to determine how the magnetic field affects the inner disk structure. The resulting temperature and density structures are ana…