Tootfinder

The evolution of CME sheath turbulence from L1 to Earth: Wind and MMS observations of the 2023-04-23 CME
Matthew R. Argall, Li-Jen Chen, No\'e Lugaz, Norberto Romanelli, Jaye L. Verniero, Charles W. Smith, Brandon Burkholder, Victoria Wilder
https://arxiv.org/abs/2505.13645

The evolution of CME sheath turbulence from L1 to Earth: Wind and MMS observations of the 2023-04-23 CME
An interplanetary shock driven by a coronal mass ejection (CME) containing an interval of sub-Alfvénic flow impacted Earth on April 23, 2024. In this article, we analyze the turbulence in the sheath region between the shock and CME to determine how it evolves from L1 (as observed by Wind) to Earth (as observed by MMS, upstream of the bow shock). Wind and MMS were separated by $55\,\mathrm{R_{E}}$ in the dawn-dusk direction, but the shock normals differ by only $2.8^{\circ}$ and the Pearson cor…

Abor & Tynna: *bescheren 🇩🇪 die drittbeste #ESC-Platzierung der letzten 10 Jahre und die sechstbeste der letzten 20 Jahre*
Deutsch-#Mastodon: hOfFeNtLicH tRiTt DiEseR eLeNdiGe #RaAb JeTzT ZUrÜcK

https://decorrespondent.nl/16046/israel-gijzelt-duizenden-palestijnen-in-martelkampen-amin-overleefde-dat-zeven-keer/884a244d-cda4-03ff-0aa3-169489cf19ee

Central Tibetan Administration Suspends Attestation Robert Spatz’s Ogyen Kunzang Choling https://openbuddhism.org/blog/2023/central-tibetan-administration-suspends-attestation-robert-spatzs-ogyen-kunzang-choling…

Solar-cycle Variability of Composite Geometry in the Solar Wind Turbulence
Zhan Fa, H. -Q. He
https://arxiv.org/abs/2505.12870 https://

Solar-cycle Variability of Composite Geometry in the Solar Wind Turbulence
The composite geometry and spectral anisotropy of the solar wind turbulence are very important topics in the investigations of solar wind. In this work, we use the magnetic field and plasma data from Wind spacecraft measured during 1995 January to 2023 December, which covers more than two solar cycles, to systematically investigate these subjects in the context of solar-cycle variability. The so-called spectrum ratio test and spectrum anisotropy test are employed to determine the three-dimensio…

https://pivot-to-ai.com/2025/04/06/how-sam-altman-got-fired-from-openai-in-2023-not-being-an-ai-doom-crank-and-lying-a-lot/
✨😶🔫🤖👀✍️👏👏

How Sam Altman got fired from OpenAI in 2023: not being an AI doom crank (and lying a lot)
Sam Altman was fired from OpenAI in 2023 by the nonprofit board. After considerable internal turmoil and external pressure from his venture capitalist mates and from Microsoft, he was reinstated. K…

Waarom er meer oversterfte is bij hitte, pol... | #EenVandaag
https://eenvandaag.avrotros.nl/artikelen/waarom-er-meer-o…

Im Jahr 2024 wurden mehr als zwei Drittel aller neuen #Wohngebäude in #Deutschland primär mit #Wärmepumpen beheizt.
Ihr Anteil hat sich in zehn Jahren mehr als verdoppelt. Tr…

Mehr als zwei Drittel der im Jahr 2024 errichteten Wohngebäude heizen mit Wärmepumpen
In immer mehr neuen Wohngebäuden in Deutschland werden Wärmepumpen zum Heizen genutzt. Mehr als zwei Drittel (69,4 %) der knapp 76 100 im Jahr 2024 fertiggestellten Wohngebäude nutzen Wärmepumpen zur primären, also überwiegend für das Heizen eingesetzten Energie. Gegenüber 2023 stieg der Anteil um rund 5 Prozentpunkte, gegenüber 2014 (31,8 %) hat er sich mehr als verdoppelt, wie das Statistische Bundesamt (Destatis) mitteilt. Wärmepumpen kommen vor allem in Ein- und Zweifamilienhä…

a great idea for #graduation gifts!
🎓 🎓 👩‍🎓 👨‍🎓 🎓 🎓
with @…

Pressure-Driven Metallicity in {\AA}ngstr\"om-Thickness 2D Bismuth and Layer-Selective Ohmic Contact to MoS2
Shuhua Wang, Shibo Fang, Qiang Li, Yunliang Yue, Zongmeng Yang, Xiaotian Sun, Jing Lu, Chit Siong Lau, L. K. Ang, Lain-Jong Li, Yee Sin Ang
https://arxiv.org/abs/2506.05133

Pressure-Driven Metallicity in Ångström-Thickness 2D Bismuth and Layer-Selective Ohmic Contact to MoS2
Recent fabrication of two-dimensional (2D) metallic bismuth (Bi) via van der Waals (vdW) squeezing method opens a new avenue to ultrascaling metallic materials into the ångström-thickness regime [Nature 639, 354 (2025)]. However, freestanding 2D Bi is typically known to exhibit a semiconducting phase [Nature 617, 67 (2023), Phys. Rev. Lett. 131, 236801 (2023)], which contradicts with the experimentally observed metallicity in vdW-squeezed 2D Bi. Here we show that such discrepancy originates f…

Débat de 2023 sur les victimes de sectes, de l’emprise Š la reconstruction. Quels sont les mécanismes Š l'oeuvre, comment identifier le discours sectaire, comment trouver de l'aide pour s'en sortir et se reconstruire ? https://chardonsbleus.org/debat-victim

From Knowledge to Noise: CTIM-Rover and the Pitfalls of Episodic Memory in Software Engineering Agents
Tobias Lindenbauer, Georg Groh, Hinrich Sch\"utze
https://arxiv.org/abs/2505.23422

From Knowledge to Noise: CTIM-Rover and the Pitfalls of Episodic Memory in Software Engineering Agents
We introduce CTIM-Rover, an AI agent for Software Engineering (SE) built on top of AutoCodeRover (Zhang et al., 2024) that extends agentic reasoning frameworks with an episodic memory, more specifically, a general and repository-level Cross-Task-Instance Memory (CTIM). While existing open-source SE agents mostly rely on ReAct (Yao et al., 2023b), Reflexion (Shinn et al., 2023), or Code-Act (Wang et al., 2024), all of these reasoning and planning frameworks inefficiently discard their long-term …

Monotone Bounded-Depth Complexity of Homomorphism Polynomials
C. S. Bhargav, Shiteng Chen, Radu Curticapean, Prateek Dwivedi
https://arxiv.org/abs/2505.22894

Monotone Bounded-Depth Complexity of Homomorphism Polynomials
For every fixed graph $H$, it is known that homomorphism counts from $H$ and colorful $H$-subgraph counts can be determined in $O(n^{t+1})$ time on $n$-vertex input graphs $G$, where $t$ is the treewidth of $H$. On the other hand, a running time of $n^{o(t / \log t)}$ would refute the exponential-time hypothesis. Komarath, Pandey and Rahul (Algorithmica, 2023) studied algebraic variants of these counting problems, i.e., homomorphism and subgraph $\textit{polynomials}$ for fixed graphs $H$. Thes…

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…

Optical Photometric Monitoring of the Blazar OT 355 and Local Standard Stars' Calibration
R. Bachev, Tushar Tripathi, Alok C. Gupta, A. Kurtenkov, Y. Nikolov, A. Strigachev, S. Boeva, G. Latev, B. Spassov, M. Minev, E. Ovcharov, W. -X. Yang, Yi Liu, J. -H. Fan
https://arxiv.org/abs/2505.23677…

Optical Photometric Monitoring of the Blazar OT 355 and Local Standard Stars' Calibration
OT 355 (4FGL J1734.3 + 3858) is a relatively rarely studied but highly variable, moderate-redshift (z = 0.975) flat-spectrum radio quasar (blazar). With this work, we aim to study its optical variability on different timescales, which can help us to better understand the physical processes in relativistic jets operating in blazar-type active galactic nuclei. OT 355 was observed in four colors (BVRI) during 41 nights between 2017 and 2023 using three 1 and 2 m class telescopes. The object was al…

Optimizing fMRI Data Acquisition for Decoding Natural Speech with Limited Participants
Louis Jalouzot, Alexis Thual, Yair Lakretz, Christophe Pallier, Bertrand Thirion
https://arxiv.org/abs/2505.21304

Optimizing fMRI Data Acquisition for Decoding Natural Speech with Limited Participants
We investigate optimal strategies for decoding perceived natural speech from fMRI data acquired from a limited number of participants. Leveraging Lebel et al. (2023)'s dataset of 8 participants, we first demonstrate the effectiveness of training deep neural networks to predict LLM-derived text representations from fMRI activity. Then, in this data regime, we observe that multi-subject training does not improve decoding accuracy compared to single-subject approach. Furthermore, training on simil…

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
Myroslava Hladchenko
https://arxiv.org/abs/2505.20944

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…

Learning to Regulate: A New Event-Level Dataset of Capital Control Measures
Geyue Sun, Xiao Liu, Tomas Williams, Roberto Samaniego
https://arxiv.org/abs/2505.23025

Learning to Regulate: A New Event-Level Dataset of Capital Control Measures
We construct a novel event-level Capital Control Measures (CCM) dataset covering 196 countries from 1999 to 2023 by leveraging prompt-based large language models (LLMs). The dataset enables event study analysis and cross-country comparisons based on rich policy attributes, including action type, intensity, direction, implementing entity, and other multidimensional characteristics. Using a two-step prompt framework with GPT-4.1, we extract structured information from the IMF's Annual Report on E…

Adams Building, Nottingham, September 2023
#photography #ukphotographer #nottingham #monochrome