Tootfinder

Strangeon Matter: from Stars to Nuggets
Haoyang Qi, Renxin Xu
https://arxiv.org/abs/2507.13935 https://arxiv.org/pdf/2507.13935

Strangeon Matter: from Stars to Nuggets
The fact that strange sea quarks are abundant in the nucleons, but without strangeness, is of great importance for understanding the nature of dense matter condensed by the strong interaction, particularly in the context of the ``gigantic nucleus'' formed by the gravitational collapse of an evolved massive star. We hypothesize that the basic unit of bulk strong matter with the light-flavor symmetry of valence quarks is ``strangeon'', which is the counterpart of the nucleon found in atomic nucle…

When Does Meaning Backfire? Investigating the Role of AMRs in NLI
Junghyun Min, Xiulin Yang, Shira Wein
https://arxiv.org/abs/2506.14613 https://

When Does Meaning Backfire? Investigating the Role of AMRs in NLI
Natural Language Inference (NLI) relies heavily on adequately parsing the semantic content of the premise and hypothesis. In this work, we investigate whether adding semantic information in the form of an Abstract Meaning Representation (AMR) helps pretrained language models better generalize in NLI. Our experiments integrating AMR into NLI in both fine-tuning and prompting settings show that the presence of AMR in fine-tuning hinders model generalization while prompting with AMR leads to sligh…

On the Efficacy of Ocean Formation with a Primordial Hydrogen Atmosphere
Darius Modirrousta-Galian, Jun Korenaga
https://arxiv.org/abs/2506.10417 https://

On the Efficacy of Ocean Formation with a Primordial Hydrogen Atmosphere
It has been suggested that Earth's present water budget formed from oxidation reactions between its initial hydrogen-rich primordial atmosphere and its magma ocean. Here we examine this hypothesis by building a comprehensive atmosphere-magma ocean model. We find that water formation is unlikely for two reasons. First, any water formed from oxidation reactions in the magma ocean would quickly outgass because of the water-poor atmosphere above. Second, the top boundary layer of the magma ocean be…

Evidence of haze control of Pluto’s atmospheric heat balance from JWST/MIRI thermal light curves: #Pluto

#LouderThanKarl #festival #darkk

Selenskyj stellt neue Abfangdrohnen in Aussicht
Bei der Abwehr des massiven russischen Angriffs auf die Hauptstadt Kiew hat die Ukraine eigenen Angaben nach Abfangdrohnen erfolgreich eingesetzt. "Dutzende (russische) 'Schaheds' wurden eben mit Abfangdrohnen abgeschossen", sagte der ukrainische Präsident Wolodymyr in seiner Tageszusammenfassung. Er gab Anweisung, mehr solcher Abfangdrohnen zu produzieren und für den Einsatz no…
📑

Ukraine-Liveblog: ++ AKW Saporischschja laut IAEA ohne Strom ++
Das von Russland besetzte Atomkraftwerk Saporischschja hat der Internationalen Atomenergiebehörde (IAEA) zufolge die externe Stromversorgung verloren. US-Präsident Trump will offenbar mit der Ukraine bei der Luftverteidigung zusammenarbeiten.

Hop-Decorate: An Automated Atomistic Workflow for Generating Defect Transport Data in Chemically Complex Materials
Peter Hatton, Blas Pedro Uberuaga, Danny Perez
https://arxiv.org/abs/2506.16835

Hop-Decorate: An Automated Atomistic Workflow for Generating Defect Transport Data in Chemically Complex Materials
Chemically complex materials (CCMs) exhibit extraordinary functional properties but pose significant challenges for atomistic modeling due to their vast configurational heterogeneity. We introduce Hop-Decorate (HopDec), a high-throughput, Python-based atomistic workflow that automates the generation of defect transport data in CCMs. HopDec integrates accelerated molecular dynamics with a novel redecoration algorithm to efficiently sample migration pathways across chemically diverse local enviro…

This https://arxiv.org/abs/2501.01009 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Detection of "diffuse" coronal He I 1083 during the April 8 2024 Solar Eclipse: evidence for terrestrial atmospheric scattering origin
Strong He I 1083 nm atomic line signals have been previously measured during total solar eclipses at coronal heights above the lunar limb. This rather unexpected measurement has kindled a discussion about the hypothesized presence of significant amounts of neutral helium at coronal conditions. We performed spectroscopic observations of the He I 1083 nm spectroscopic region with the newly built CHEESE instrument during the April 8th 2024 total solar eclipse to test the presence of He I 1083 in t…

Heute vor 63 Jahren: Am 6. Juli 1962 zündeten die #USA im Rahmen von Operation Storax die Atombombe "Sedan". Storax war eine Serie von #Kernwaffentests bei der 62/63 insgesamt 47 Bomben im Testgebiet in #Nevada

Traveling waves for highly degenerate and singular reaction-diffusion-advection equations with discontinuous coefficients
Umberto Guarnotta, Cristina Marcelli
https://arxiv.org/abs/2507.06027

Traveling waves for highly degenerate and singular reaction-diffusion-advection equations with discontinuous coefficients
Sufficient conditions for either existence or non-existence of traveling wave solutions for a general quasi-linear reaction-diffusion-convection equation, possibly highly degenerate or singular, with discontinuous coefficients are furnished. Under an additional hypothesis on the convection term, the set of admissible wave speeds is characterized in terms of the minimum wave speed, which is estimated through a double-sided bound.