Tootfinder

The rate of descent did not slow as much as expected,
and the spacecraft probably made a hard landing.
The laser instrument that measured how high Resilience was above the surface was slow in making its measurements,
which may have contributed to the problem.
“At this point, we do not know clearly about the cause,”
Takeshi Hakamada, the chief executive of Ispace, said in translated remarks.
The loss of the second mission could lead NASA to rethink its pla…

Ispace of Japan’s Moon Lander Resilience Has Crashed
The loss of the Resilience spacecraft by Ispace repeated a crash into the moon in 2023 of the company’s first robotic lunar landing mission.

This https://arxiv.org/abs/2412.13191 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Moment-sos and spectral hierarchies for polynomial optimization on the sphere and quantum de Finetti theorems
We revisit the convergence analysis of two approximation hierarchies for polynomial optimization on the unit sphere. The first one is based on the moment-sos approach and gives semidefinite bounds for which Fang and Fawzi (2021) showed an analysis in $O(1/r^2)$ for the r-th level bound, using the polynomial kernel method. The second hierarchy was recently proposed by Lovitz and Johnston (2023) and gives spectral bounds for which they show a convergence rate in $O(1/r)$, using a quantum de Finet…

This https://arxiv.org/abs/2505.16488 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Kinetic approximation for equations of discrete turbulence in the subcritical case
We consider a damped/driven cubic NLS equation on a torus under the limit when first the amplitude of solutions goes to zero and then the period of the torus goes to infinity. We suggest another proof of the kinetic approximation for the energy spectrum under a subcritical scaling, extending to the exact solutions result obtained in [Dymov, Kuksin, Maiocchi, Vladuts '2023] for quasisolutions which were defined as the second order truncations of decompositions for the solutions in amplitude. The…

Heute, jetzt gleich demnächst: Abschlussworkshop zum @… Projekt „Potentials of Advanced Text Technologies. Auf maschinellem Lernen basierende Texterkennung (PATT)“ in der Hochschulbibliothek der #ZHAW
Mit dabei: meine

This https://arxiv.org/abs/2505.20944 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csDL_…

International collaboration of Ukrainian scholars: Effects of Russia's full-scale invasion of Ukraine International collaboration of Ukrainian scholars: Effects of Russia's full-scale invasion of Ukraine
This study explores the effects of Russia's full-scale invasion of Ukraine on the international collaboration of Ukrainian scholars. First and foremost, Ukrainian scholars deserve respect for continuing to publish despite life-threatening conditions, mental strain, shelling and blackouts. In 2022-2023, universities gained more from international collaboration than the NASU. The percentage of internationally co-authored articles remained unchanged for the NASU, while it increased for universitie…

🇺🇦 #NowPlaying on KEXP's #VarietyMix
Funkadelic:
🎵 Maggot Brain (remastered 2023)
#Funkadelic
https://derrok.bandcamp.com/track/gusano-funkadelics-maggot-brain-cover
https://open.spotify.com/track/5WJU527RQNyMLuKecjsL8V

KI krempelt vieles um. Es ist so einfach, wie nie, Content zu produzieren. Gleichzeitig bekommen wir durch die Veränderungen bei Google & Co. (allen voran durch die AI Overviews) immer weniger Klicks auf unseren Content. Persönlichkeit wird zum wichtigsten Unterscheidungsmerkmal, meint Judith Peters #Bloggen #KI

Monatsrückblick Mai 2025: Die KI-Explosion
ChatGPT hat Anfang 2023 unser Leben überrollt. Aber erst jetzt, ca. 2,5 Jahre später, habe ich das Gefühl: KI ist...

HouseTS: A Large-Scale, Multimodal Spatiotemporal U.S. Housing Dataset
Shengkun Wang, Yanshen Sun, Fanglan Chen, Linhan Wang, Naren Ramakrishnan, Chang-Tien Lu, Yinlin Chen
https://arxiv.org/abs/2506.00765

HouseTS: A Large-Scale, Multimodal Spatiotemporal U.S. Housing Dataset
Accurate house-price forecasting is essential for investors, planners, and researchers. However, reproducible benchmarks with sufficient spatiotemporal depth and contextual richness for long horizon prediction remain scarce. To address this, we introduce HouseTS a large scale, multimodal dataset covering monthly house prices from March 2012 to December 2023 across 6,000 ZIP codes in 30 major U.S. metropolitan areas. The dataset includes over 890K records, enriched with points of Interest (POI),…

This https://arxiv.org/abs/2404.08048 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

The origin of the coherent radio flash potentially associated with GRB 201006A
Rowlinson et al. 2023 recently claimed the detection of a coherent radio flash 76.6 minutes after a short gamma-ray burst. They proposed that the radio emission may be associated with a long-lived neutron star engine. We show through theoretical and observational arguments that the coherent radio emission, if real and indeed associated with GRB 201006A and at the estimated redshift, is unlikely to be due to the collapse of the neutron star, ruling out a blitzar-like mechanism. Instead, we show …

Change of bifurcation type in 2D free boundary model of a moving cell with nonlinear diffusion
Leonid Berlyand, Oleksii Krupchytskyi, Tim Laux
https://arxiv.org/abs/2506.03138

Change of bifurcation type in 2D free boundary model of a moving cell with nonlinear diffusion
We introduce a 2D free boundary problem with nonlinear diffusion that models a living cell moving on a substrate. We prove that this nonlinearity results in a qualitative of solution behavior compared to the linear diffusion case (Rybalko et al. TAMS 2023), namely the switch between direct and inverse pitchfork bifurcation. Our objectives are twofold: (i) develop a rigorous framework to prove existence of bifurcation and determining its type (subcritical vs. superctitical) and (ii) the deri…

Verification of the Timing System for the X-ray Imaging and Spectroscopy Mission in the GPS Unsynchronized Mode
Megumi Shidatsu, Yukikatsu Terada, Takashi Kominato, So Kato, Ryohei Sato, Minami Sakama, Takumi Shioiri, Yugo Motogami, Yuuki Niida, Chulsoo Kang, Toshihiro Takagi, Taichi Nakamoto, Chikara Natsukari, Makoto S. Tashiro, Kenichi Toda, Hironori Maejima, Shin Watanabe, Ryo Iizuka, Rie Sato, Chris Baluta, Katsuhiro Hayashi, Tessei Yoshida, Shoji Ogawa, Yoshiaki Kanemaru, Kotaro Fukushima, Akio Hoshino, Hiromitsu Takahashi, Masayoshi Nobukawa, Tsunefumi Mizuno, Kazuhiro Nakazawa, Shinichiro Uno, Ken Ebisawa, Satoshi Eguchi, Satoru Katsuda, Aya Kubota, Naomi Ota, Atsushi Tanimoto, Yuichi Terashima, Yohko Tsuboi, Yuusuke Uchida, Hideki Uchiyama, Shigeo Yamauchi, Tomokage Yoneyama, Satoshi Yamada, Nagomi Uchida, Matt Holland, Michael Loewenstein, Tahir Yaqoob, Eric D. Miller, Robert S. Hill, Efrain C. Perez-Solis, Morgan D. Waddy, Mark Mekosh, Joseph B. Fox, Isabella S. Brewer, Emily Aldoretta, Koji Mukai, Kenji Hamaguchi, Francois Mernier, Anna Ogorzalek, Katja Pottschmidt, Mihoko Yukita
#toXiv_bot_toot

Speeding Up Hyper-Heuristics With Markov-Chain Operator Selection and the Only-Worsening Acceptance Operator
Abderrahim Bendahi, Benjamin Doerr, Adrien Fradin, Johannes F. Lutzeyer
https://arxiv.org/abs/2506.01107

Speeding Up Hyper-Heuristics With Markov-Chain Operator Selection and the Only-Worsening Acceptance Operator
The move-acceptance hyper-heuristic was recently shown to be able to leave local optima with astonishing efficiency (Lissovoi et al., Artificial Intelligence (2023)). In this work, we propose two modifications to this algorithm that demonstrate impressive performances on a large class of benchmarks including the classic Cliff$_d$ and Jump$_m$ function classes. (i) Instead of randomly choosing between the only-improving and any-move acceptance operator, we take this choice via a simple two-state…

On the homological shifts of cover ideals of Cohen-Macaulay graphs
Amit Roy, Kamalesh Saha
https://arxiv.org/abs/2506.01810 https://a…

On the homological shifts of cover ideals of Cohen-Macaulay graphs
For a non-negative integer $k$, let $\mathrm{HS}_{k}(J(G))$ denote the $k^{\text{th}}$ homological shift ideal of the vertex cover ideal $J(G)$ of a graph $G$. For each $k\geq 2$, we construct a Cohen-Macaulay very well-covered graph $G_k$ which is both Cohen-Macaulay bipartite and a whiskered graph so that $\mathrm{HS}_{k}(J(G))$ does not have a linear resolution. This contradicts several results as well as disproves a conjecture in [J. Algebra, $\mathbf{629}$, (2023), 76-108] and [Mediterr. J…

"Carbon footprint of Israel’s war on Gaza exceeds that of many entire countries"
#Gaza #Emissions #Climate #ClimateChange

This https://arxiv.org/abs/2306.14853 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Near-Optimal Nonconvex-Strongly-Convex Bilevel Optimization with Fully First-Order Oracles
In this work, we consider bilevel optimization when the lower-level problem is strongly convex. Recent works show that with a Hessian-vector product (HVP) oracle, one can provably find an $ε$-stationary point within ${\mathcal{O}}(ε^{-2})$ oracle calls. However, the HVP oracle may be inaccessible or expensive in practice. Kwon et al. (ICML 2023) addressed this issue by proposing a first-order method that can achieve the same goal at a slower rate of $\tilde{\mathcal{O}}(ε^{-3})$. In this pap…

Happy & Glorious: Coronation art exhibition goes on show https://www.nationalarchives.gov.uk/about/news/happy-glorious-coronation-art-exhibition-goes-on-show/

Happy & Glorious: Coronation art exhibition goes on show - The National Archives
Stunning new artwork commissioned by the Government Art Collection to mark the Coronation of Their Majesties King Charles III and Queen Camilla has gone on show in our Happy & Glorious exhibition. The free exhibition includes work by artists from across the UK created in response to the Coronation on 6 May 2023. For the […]