Tootfinder

Trying to figure out why Gemini AI in Gmail is so very bad. It seems to not have access to all of my email and whatever RAG-like thing they are doing is very stupid.
Here's Gemini saying my oldest email matching some keywords in 2021 is from March 2021. If I explicitly tell it to look in February 2021, it finds it. There's only 11 emails that match in all of 2021, it's not like I'm blowing up the context window.

Loneliness and the Power of Convergence
#Community #CreativeCommunity
https://muz4now.com/202…

Loneliness and the Power of Convergence
Stan Stewart - @muz4now

Here's your annual warning to beware hanging out in person with Defcon attendees, because many of them have returned with asymptomatic COVID infections.
As in every year since 2021, Defcon is a super spreader event. Many COVID infections are NOT symptomatic: not showing symptoms does not guarantee not carrying the highly contagious virus.

Senior State Department staffer Darren Beattie,
a passionate Putin supporter behind the move to dismantle a key agency fighting Russian propaganda,
is married to a Russian woman whose uncle is a longtime Kremlin ally, according to The Telegraph.
Yulia Kirillova grew up in Moscow, studied abroad in North America, and married Beattie in 2021 in Florida.
She moved to D.C. in January.
Her uncle Sergei Cherniko is a drinks magnate who had an estimated net worth of $1…

Trump Official Behind Controversial Russia Decision Has Kremlin Ties
Darren Beattie dismantled a key agency fighting Russian propaganda. There’s a reason why.

Benchmarking GPT-5 in Radiation Oncology: Measurable Gains, but Persistent Need for Expert Oversight
Ugur Dinc, Jibak Sarkar, Philipp Schubert, Sabine Semrau, Thomas Weissmann, Andre Karius, Johann Brand, Bernd-Niklas Axer, Ahmed Gomaa, Pluvio Stephan, Ishita Sheth, Sogand Beirami, Annette Schwarz, Udo Gaipl, Benjamin Frey, Christoph Bert, Stefanie Corradini, Rainer Fietkau, Florian Putz

Benchmarking GPT-5 in Radiation Oncology: Measurable Gains, but Persistent Need for Expert Oversight
Introduction: Large language models (LLM) have shown great potential in clinical decision support. GPT-5 is a novel LLM system that has been specifically marketed towards oncology use. Methods: Performance was assessed using two complementary benchmarks: (i) the ACR Radiation Oncology In-Training Examination (TXIT, 2021), comprising 300 multiple-choice items, and (ii) a curated set of 60 authentic radiation oncologic vignettes representing diverse disease sites and treatment indications. For …

https://edweeb8mb9u.exactdn.com/wp-content/uploads/2021/01/Porto-Flavia.jpg?strip=all&lossy=1&resize=840,560&ssl=1

Proof of the linkage conjecture for highly connected tournaments
Jia Zhou, Jin Yan
https://arxiv.org/abs/2507.22651 https://arxiv.org/pdf/2507.22651…

Proof of the linkage conjecture for highly connected tournaments
A digraph $D$ is $k$-linked if for every $2k$ distinct vertices $ x_1,\ldots , x_k, y_1, \ldots , y_k$ in $D$, there exist $k$ pairwise vertex-disjoint paths $P_1,\ldots, P_k$ such that $P_i$ starts at $x_i$ and ends at $y_i$ for each $i\in [k]$. In 2021, Girão, Popielarz, and Snyder [Combinatorica 41 (2021) 815--837] conjectured that there exists a constant $C >0$ such that every $(2k+1)$-connected tournament with minimum out-degree at least $Ck$ is $k$-linked. In this paper, we disprove this…

Am 25. Oktober um 12 Uhr werden die beiden 161 Meter hohen #Kühltürme des ehemaligen AKW #Gundremmingen gesprengt.
Nach der Abschaltung 2021 markiert dies einen weiteren Schritt im Rückbau.
Rund 11.000 Tonnen Schutt werden erwartet. Die Behörden bereiten sich auf zahlre…

AKW Gundremmingen: Termin für die Sprengung der Kühltürme steht
Auf Nachfrage der Redaktion bestätigt der Betreiber RWE jetzt offiziell: Am Samstag, 25. Oktober, fallen die Kühltürme. Auf Gundremmingen wird einiges zukommen.

🇵🇱 Cześć! Jestem Łukasz. Trójka z przodu. Warszawa. Na fedi mniej-więcej od 2021 r. Łączę dwa konta w jedno i od tej pory będzie tu więcej polskojęzycznych postów (a jeśli obserwowałxś mnie na polskojęzycznym koncie, to dostaniesz więcej treści po angielsku 😄).
Mam kilka równoległych żyć.
Przez większość czasu buduję rzeczy w internetach, głównie z użyciem TypeScriptu, Reacta i całej reszty tego jazzu. Ciągle jednak lubię generatory stron statycznych i stary dobry HTML/CSS.
W innym życiu jestem fotografem-dokumentalistą i fotoreporterem. Interesuje mnie aktywizm, sztuka, kultura, polityka oraz wszystko, co jest ciekawe, a dzieje się na ulicach miast. Dużo uwagi poświęcam protestom i demonstracjom w Polsce, zwłaszcza dotyczącym praw człowieka i kwestii społecznych. Interesuje mnie też sztuka uliczna, zwłaszcza taka, która niesie ze sobą mocne komunikaty.
Zdarza mi się blogować i tłumaczyć teksty. Wiele lat temu napisałem dwie książki o WordPressie. Obecnie jednak wolę gdzieś wyjść niż spędzać jeszcze więcej czasu przed ekranem.
Okazjonalnie zdarza mi się postować o zdrowiu psychicznym i polityce. Staram się używać CW kiedy to możliwe.
Postuję po polsku i angielsku w zależności od tematu.
No i... chyba tyle. Miło Cię widzieć!
#introduction #witajswiecie #przywitanie #wprowadzenie

Making a Case for Research Collaboration Between Artificial Intelligence and Operations Research Experts
Radhika Kulkarni, Gianluca Brero, Yu Ding, Swati Gupta, Sven Koenig, Ramayya Krishnan, Thiago Serra, Phebe Vayanos, Segev Wasserkrug, Holly Wiberg
https://arxiv.org/abs/2507.21076

Making a Case for Research Collaboration Between Artificial Intelligence and Operations Research Experts
In 2021, INFORMS, ACM SIGAI, and the Computing Community Consortium (CCC) hosted three workshops to explore synergies between Artificial Intelligence (AI) and Operations Research (OR) to improve decision-making. The workshops aimed to create a unified research vision for AI/OR collaboration, focusing on overcoming cultural differences and maximizing societal impact. The first two workshops addressed technological innovations, applications, and trustworthy AI development, while the final worksho…

Streit um Blutsauerstoffmessung: Apple Watch in den USA wieder vor Gericht
Apple zofft sich seit 2021 mit Masimo um eine mögliche Patentverletzung bei der Apple Watch. Nun wurde Berufung eingelegt.

ThinkBroadband: 78% of UK properties have access to full-fiber broadband, up from 12% in Jan. 2020, which experts credit to Ofcom's 2021 pro-competition push (Financial Times)

As early as 6 January 2021, Donald Darth #Trump demonstrated his intention to overthrow US democracy. Since being elected president for a second time, he has consistently and brutally pursued this goal at the expense of US citizens.
Darth Trump is a #freebooter.

Strong Lens Discoveries in DESI Legacy Imaging Surveys DR10 with Two Deep Learning Architectures
Jose Carlos Inchausti, Christopher J. Storfer, Xiaosheng Huang, Yuan-Ming Hsu, Brandt Kaufmann, Chaitanya Pasupala, S. Banka, A. Dey, D. Lang, A. Meisner, J. Moustakas, A. D. Myers, E. F. Schlafly, D. J. Schlegel
https://arxiv.org/abs/2508.2008…

Strong Lens Discoveries in DESI Legacy Imaging Surveys DR10 with Two Deep Learning Architectures
We have conducted a search for strong gravitational lensing systems in the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys Data Release 10 (DR10). This paper is the fourth in a series of searches (following Huang et al. 2020; Huang et al. 2021; Storfer et al. 2024, Paper I, II, & III respectively). This is the first catalog of lens candidates covering nearly the entirety of the extragalactic sky south of declination $δ\approx +32$ deg, all of it observed by the DECam, coveri…

Requiem for a Stranger
- inspiration from grief and hope -
#StrangerRequiem #NowPlaying
https://

Requiem for a Stranger #StrangerRequiem #NowPlaying
Stan Stewart - @muz4now

from my link log —
Creating a read-only PostgreSQL user.
https://blog.crunchydata.com/blog/creating-a-read-only-postgres-user
saved 2021-05-12

Creating a Read-Only Postgres User | Crunchy Data Blog
Learn how to create a read only user in Postgres both now and with a look ahead to Postgres 14.

The Atacama Cosmology Telescope: Release of A databaSe of millimeTeR ObservatioNs of Asteroids Using acT (ASTRONAUT)
Ricco C. Venterea, John Orlowski-Scherer, Nicholas Battaglia, Sigurd Naess, Steve K. Choi, Allen Foster, Joseph Golec, Bruce Patridge, Crist\'obal Sif\'on
https://arxiv.org/abs/2508.18300

The Atacama Cosmology Telescope: Release of A databaSe of millimeTeR ObservatioNs of Asteroids Using acT (ASTRONAUT)
We present A databaSe of millimeTeR ObservatioNs of Asteroids Using acT (ASTRONAUT) hosted on Amazon Web Services, Inc. (AWS) in the form of a public Amazon Simple Storage Service (S3) bucket. This bucket is an Amazon cloud storage database containing flux measurements for a group of asteroids at millimeter (mm) wavelengths. These measurements were collected by the Atacama Cosmology Telescope (ACT) from 2017 to 2021 in frequency bands centered near 90, 150, and 220 GHz. The ASTRONAUT database c…

The role of preprints in open science: Accelerating knowledge transfer from science to technology
Zhiqi Wang, Yue Chen, Chun Yang
https://arxiv.org/abs/2506.20225

The role of preprints in open science: Accelerating knowledge transfer from science to technology
Preprints have become increasingly essential in the landscape of open science, facilitating not only the exchange of knowledge within the scientific community but also bridging the gap between science and technology. However, the impact of preprints on technological innovation, given their unreviewed nature, remains unclear. This study fills this gap by conducting a comprehensive scientometric analysis of patent citations to bioRxiv preprints submitted between 2013 and 2021, measuring and acces…

Modeling Star Formation Histories of Changing-Look AGN Host Galaxies with Prospector
Margaret E. Verrico, K. Decker French, Katherine Suess, Tanay Agrawal, Lauranne Lanz, Yuanze Luo, Pallavi Patil, Kate Rowlands, Margaret Shepherd, Maya Skarbinski
https://arxiv.org/abs/2506.19162

Modeling Star Formation Histories of Changing-Look AGN Host Galaxies with Prospector
Changing-look active galactic nuclei, or CL-AGN, are AGN which appear to transition between Seyfert Type 1 and 2 over periods of months to years. Several mechanisms to trigger these transitions have been proposed, but we have yet to conclusively determine their cause. Recent studies suggest CL-AGN are hosted primarily in galaxies which are shutting down star formation (Dodd et al. 2021; Liu et al. 2021, Wang et al. 2023), which may indicate a link between galaxy quenching and changing look even…

Measurement of the branching fraction of $\psip \to \omega \eta \eta$
BESIII Collaboration, et al.
https://arxiv.org/abs/2508.19092 https://arxiv.org/pdf/2…

Measurement of the branching fraction of $\psip \to ωηη$
Using a sample of (2.712 $\pm$ 0.014)$\times 10^{9}$ $\psip$ events collected with the BESIII detector at the BEPCII collider in 2009, 2012, and 2021, the decay $\psip \to ωηη$ is observed for the first time. The branching fraction of the $ψ(3686)\toωηη$ decay is measured to be (1.65 $\pm$ 0.02 $\pm$ 0.21)$\times 10^{-5}$, where the first uncertainty is statistical and the second systematic. Clear structures associated with the well-established $ω(1420)$ and $f_{0}(1710)$ resonances are…

Chiefs WR Hollywood Brown vows to get back to 'best self' https://www.espn.com/nfl/story/_/id/45531855/chiefs-kansas-city-hollywood-brown-injury-history-2025

Rota-Baxter operators on compact simple Lie groups and algebras
Saveliy V. Skresanov
https://arxiv.org/abs/2506.14324 https://arxiv.o…

Rota-Baxter operators on compact simple Lie groups and algebras
A Rota-Baxter operator on a Lie group $ G $ is a smooth map $ B : G \to G $ such that $ B(g)B(h) = B(gB(g)hB(g)^{-1}) $ for all $ g, h \in G $. This concept was introduced in 2021 by Guo, Lang and Sheng as a Lie group analogue of Rota-Baxter operators of weight 1 on Lie algebras. We show that the only Rota-Baxter operators on compact simple Lie groups are the trivial map and the inverse map. A similar description for Rota-Baxter operators of weight 1 on compact simple Lie algebras is provided.

Blue Lights, Insurmountable Debt, and the Affordances of its Erasure https://popularcultureandtheology.com/2025/06/20/blue-lights-insurmountable-debt-and-the-affordances-of-its-erasure/

Blue Lights, Insurmountable Debt, and the Affordances of its Erasure
By Justin Martin In The Dawn of Everything: A New History of Humanity (2021), anthropologist David Graeber and Archeologist David Wengrow set out to offer a new way of thinking about the human orig…

A generalization of Deodhar's defect statistic for Iwahori--Hecke algebras of type $BC$
Gavin Hobbs, Tommy Parisi, Mark Skandera, Jiayuan Wang
https://arxiv.org/abs/2506.20099

A generalization of Deodhar's defect statistic for Iwahori--Hecke algebras of type $BC$
Let $H$ be the Iwahori--Hecke algebra corresponding to any Coxeter group. Deodhar's defect statistic [Geom. Dedicata 36, (1990) pp.95--119] allows one to expand products of simple Kazhdan--Lusztig basis elements of $H$ in the natural basis of $H$. Clearwater and the third author gave a type-$A$ extension [Ann. Comb. 25, no. 3 (2021) pp.757--787] of this formula which combinatorially describes the natural expansion of products of Kazhdan--Lusztig basis elements indexed by smooth elements of the …

Recent Advances and Trends in Research Paper Recommender Systems: A Comprehensive Survey
Iratxe Pinedo, Mikel Larra\~naga, Ana Arruarte
https://arxiv.org/abs/2508.08828 https://…

Recent Advances and Trends in Research Paper Recommender Systems: A Comprehensive Survey
As the volume of scientific publications grows exponentially, researchers increasingly face difficulties in locating relevant literature. Research Paper Recommender Systems have become vital tools to mitigate this information overload by delivering personalized suggestions. This survey provides a comprehensive analysis of Research Paper Recommender Systems developed between November 2021 and December 2024, building upon prior reviews in the field. It presents an extensive overview of the techni…

Wren Loud and Bold Ambient (2021-06) - Ambient soundscape from 16WW back garden birdlife; small bird makes big noise! #wren #soundscape #fieldRecording -

The $3$-sparsity of $X^n-1$ over finite fields
Kaimin Cheng
https://arxiv.org/abs/2507.06655 https://arxiv.org/pdf/2507.06655

The $3$-sparsity of $X^n-1$ over finite fields
Let $q$ be a prime power and $\mathbb{F}_q$ the finite field with $q$ elements. For a positive integer $n$, the binomial $f_n(X):= X^n-1\in\mathbb{F}_q[X]$ is called $3$-sparse over $\mathbb{F}_q$ if each irreducible factor of $f_n(X)$ over $\mathbb{F}_q$ is either a binomial or a trinomial. In 2021, Oliveira and Reis characterized all positive integers $n$ for which $f_n(X)$ is $3$-sparse over $\mathbb{F}_q$ when $q = 2$ and $q = 4$, and posed the open problem of whether, for any given $q$, th…

Kumulativer Zubau von #Balkonsolarleistung in #Deutschland mit Stand vom 08.08.2025.
Die summarische Leistung aller offiziell registrierten #Steckersolaranlagen beträgt…

Data-Driven Modeling of IRCU Patient Flow in the COVID-19 Pandemic
Ana Carmen Navas-Ortega, Jos\'e Antonio S\'anchez-Mart\'inez, Paula Garc\'ia-Flores, Concepci\'on Morales-Garc\'ia, Rene Fabregas
https://arxiv.org/abs/2506.09751

Data-Driven Modeling of IRCU Patient Flow in the COVID-19 Pandemic
Intermediate Respiratory Care Units (IRCUs) are vital during crises like COVID-19. This study evaluated clinical outcomes and operational dynamics of a new Spanish IRCU with specialized staffing. A prospective cohort study (April-August 2021) included 249 adult patients with COVID-19 respiratory failure (UHVN IRCU, Granada). Data on demographics, Non-Invasive Ventilation (NIV), length of stay (LOS), and outcomes (ICU transfer, exitus, recovery) were analyzed. Patient flow was simulated using a …

Certification of High-Dimensional Entanglement Within the Resource Theory of Buscemi Nonlocality
Xian Shi
https://arxiv.org/abs/2506.07195 https://

Certification of High-Dimensional Entanglement Within the Resource Theory of Buscemi Nonlocality
The study on the certification of high degree entanglement, which is quantified in terms of Schmidt number, attracts much attention recently. Drawing inspiration from the work [PRX QUANTUM 2, 020301 (2021)], we first introduce resource theories of distributed measurements and teleportation instruments generated by a bipartite mixed state. Next we quantitatively characterized the relations among the convex resource theories of distributed measurements, teleportation instruments, and bipartite mi…

Schramm-Loewner evolution contains a topological Sierpi\'nski carpet when $\kappa$ is close to 8
Haoyu Liu, Zijie Zhuang
https://arxiv.org/abs/2506.09609

Schramm-Loewner evolution contains a topological Sierpiński carpet when $κ$ is close to 8
We consider the Schramm-Loewner evolution (SLE$_κ$) for $κ\in (4,8)$, which is the regime where the curve is self-intersecting but not space-filling. We show that there exists $δ_0>0$ such that for $κ\in (8 - δ_0,8)$, the range of an SLE$_κ$ curve almost surely contains a topological Sierpiński carpet. Combined with a result of Ntalampekos (2021), this implies that in this parameter range, SLE$_κ$ is almost surely conformally non-removable, and the conformal welding problem for SLE$_κ$…

@… Als geborener Lindener muss ich sagen: Das mit der SPD ist vorbei und kommt auch nicht wieder:
https://…

Bias correction for Chatterjee's graph-based correlation coefficient
Mona Azadkia, Leihao Chen, Fang Han
https://arxiv.org/abs/2508.09040 https://arxiv…

Bias correction for Chatterjee's graph-based correlation coefficient
Azadkia and Chatterjee (2021) recently introduced a simple nearest neighbor (NN) graph-based correlation coefficient that consistently detects both independence and functional dependence. Specifically, it approximates a measure of dependence that equals 0 if and only if the variables are independent, and 1 if and only if they are functionally dependent. However, this NN estimator includes a bias term that may vanish at a rate slower than root-$n$, preventing root-$n$ consistency in general. In …

Spend management startup Alaan raised a $48M Series A led by Peak XV, one of the Middle East's largest Series A rounds for a fintech, after a $2.5M seed in 2021 (Tage Kene-Okafor/TechCrunch)
https://techcrunch.com/2025/08/05/ai-p

AI-powered fintech Alaan raises $48M, one of the largest Series A rounds in MENA | TechCrunch
When Parthi Duraisamy was a consultant at McKinsey’s Dubai office, he discovered that the American Express cards his company relied on for corporate

Ammonia, Methane, Hydrogen and Methanol Produced in Remote Renewable Energy Hubs: a Comparative Quantitative Analysis
Antoine Larbanois, Victor Dachet, Antoine Dubois, Rapha\"el Fonteneau, Damien Ernst
https://arxiv.org/abs/2507.07681

Ammonia, Methane, Hydrogen and Methanol Produced in Remote Renewable Energy Hubs: a Comparative Quantitative Analysis
Remote renewable energy hubs (RREHs) for synthetic fuel production are engineering systems harvesting renewable energy where it is particularly abundant. They produce transportable synthetic fuels for export to distant load centers. This article aims to evaluate the production costs of different energy carriers, and includes a discussion on advantages and disadvantages in terms of technical performance. To do so, we extend the study of Berger et al., (2021) which focuses on methane (CH4) as ene…

Robustness of Floquet topological phase at room temperature: a first-principles dynamics study
Ruiyi Zhou, Yosuke Kanai
https://arxiv.org/abs/2506.12005 ht…

Robustness of Floquet topological phase at room temperature: a first-principles dynamics study
Nonadiabatic Thouless pumping of electrons is studied within the framework of topological Floquet engineering, particularly focused on how atomic lattice dynamics affect the emergent Floquet topological phase in trans-polyacetylene under the driving electric field. As similarly done in the earlier work [Zhou and Kanai, J. Phys. Chem. Lett., 12, 4496 (2021)], the real-time time-dependent density functional theory and Ehrenfest dynamics simulations were used to investigate the extent to which the…

This https://arxiv.org/abs/2504.13658 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

SRGAJ230631.0+155633: an extremely X-ray luminous, heavily obscured, radio-loud quasar at z=0.44 discovered by SRG/ART-XC
We report on a detailed study of a luminous, heavily obscured ($N_{\rm H} \sim 2 \times 10^{23}$ cm$^{-2}$), radio-loud quasar SRGAJ230631.0+155633, discovered in the 4--12 keV energy band by the Mikhail Pavlinsky ART-XC telescope aboard the SRG observatory during the first two years of its all-sky X-ray survey in 2020--2021. The object is located at $z=0.4389$ and is a type 2 AGN according to optical spectroscopy (SDSS, confirmed by DESI). We combine radio-to-X-ray data, including near-simulta…

Anzahl der #Balkonkraftwerke in #Deutschland mit Stand vom 19.06.2025.
Der aktuelle Höchststand liegt bei 989236 registrierten Anlagen.
12.347 mehr als am 11.06.2025.
Unplausible Inbetriebnahmedaten von 1923 bis 2015 wurden durch das Registrierungsdatum der

Gruden eager to find 'truth' in NFL emails case https://www.espn.com/nfl/story/_/id/45960156/jon-gruden-eager-discover-truth-nfl-emails-lawsuit

Surgeons Awareness, Expectations, and Involvement with Artificial Intelligence: a Survey Pre and Post the GPT Era
Lorenzo Arboit, Dennis N. Schneider, Toby Collins, Daniel A. Hashimoto, Silvana Perretta, Bernard Dallemagne, Jacques Marescaux, EAES Working Group, Nicolas Padoy, Pietro Mascagni
https://arxiv.org/abs/2506.08258

Surgeons Awareness, Expectations, and Involvement with Artificial Intelligence: a Survey Pre and Post the GPT Era
Artificial Intelligence (AI) is transforming medicine, with generative AI models like ChatGPT reshaping perceptions of its potential. This study examines surgeons' awareness, expectations, and involvement with AI in surgery through comparative surveys conducted in 2021 and 2024. Two cross-sectional surveys were distributed globally in 2021 and 2024, the first before an IRCAD webinar and the second during the annual EAES meeting. The surveys assessed demographics, AI awareness, expectations, inv…

Antiquantum $q$-series and mock theta functions
Amanda Folsom, David Metacarpa
https://arxiv.org/abs/2507.03824 https://arxiv.org/pdf…

Antiquantum $q$-series and mock theta functions
Ramanujan's original definition of mock theta functions from 1920 involves their asymptotic behaviors at roots of unity on the boundary of the disk of convergence $|q|<1$. More recently this topic has been related by several authors, including the first author with Ono and Rhoades in 2013, to quantum modular forms, first defined in 2010 by Zagier. In 2021, Lovejoy defined and studied related quantum $q$-series identities, which do not hold as equalities between power series inside the…

Latent Spatial Heterogeneity in U.S. Cancer Mortality: A Multi-Site Clustering and Spatial Autocorrelation Analysis
E. Kubuafor, D. Baidoo, A. Duah, R. Amevor, O. J. Okeke, D. Quaye, P. O. Appiah
https://arxiv.org/abs/2508.12188

Latent Spatial Heterogeneity in U.S. Cancer Mortality: A Multi-Site Clustering and Spatial Autocorrelation Analysis
This research set out to explore and delineate spatial patterns and mortality distributions for various cancer types across U.S. states between 1999 and 2021. The aim was to uncover region-specific cancer burdens and inform geographically targeted prevention efforts. We analyzed state-level cancer mortality records sourced from the CDC WONDER platform, concentrating on cancer sites consistently reported across the 48 contiguous states and Washington, D.C., excluding Hawaii, Alaska, and Puerto R…

Recent Chemo-morphological Coma Evolution of Comet 67P/Churyumov-Gerasimenko
Brian P. Murphy, Cyrielle Opitom, Colin Snodgrass, Sophie E. Deam, L\'ea Ferellec, Matthew Knight, Bin Yang, Vincent Okoth
https://arxiv.org/abs/2507.13979

Recent Chemo-morphological Coma Evolution of Comet 67P/Churyumov-Gerasimenko
We present VLT/MUSE observations of comet 67P/Churyumov-Gerasimenko during its 2021 perihelion passage, from which we generated simultaneous maps of dust, [OI], C$_2$, NH$_2$, and CN comae across 12 pre- and post-perihelion epochs. These maps reveal the evolutionary and compositional trends of 67P's coma and further enrich the context and findings of ESA's Rosetta mission. Dust and gas species displayed distinct structures, where NH$_2$ and CN signals were uniquely associated with known dust fa…

Multiple machine-learning as a powerful tool for the star clusters analysis
Denilso Camargo
https://arxiv.org/abs/2506.13951 https://…

Multiple machine-learning as a powerful tool for the star clusters analysis
This work proposes a multiple machine learning method (MMLM) aiming to improve the accuracy and robustness in the analysis of star clusters. The MMLM performance is evaluated by applying it to the reanalysis of the old binary cluster candidate - NGC 1605a and NGC 1605b - found by Camargo (2021) (hereafter C21). The binary cluster candidate is analyzed by employing a set of well established machine learning algorithms applied to the Gaia-EDR3 data. Membership probabilities and open clusters (OCs…

Unavoidable pivot-minors in graphs of large rank-depth
Jungho Ahn, Kevin Hendrey, O-joung Kwon, Sang-il Oum
https://arxiv.org/abs/2507.12697 https://

Unavoidable pivot-minors in graphs of large rank-depth
Shrub-depth and rank-depth are related graph parameters that are dense analogs of tree-depth. We prove that for every positive integer $t$, every graph of sufficiently large rank-depth contains a pivot-minor isomorphic to a path on $t$ vertices or a graph consisting of two disjoint cliques of size $t$ joined by a half graph. This answers an open problem raised by Kwon, McCarty, Oum, and Wollan in 2021.

APCs and citation impact of Gold OA articles authored by Ukrainian scholars before and during Russia's full-scale war against Ukraine (2020-2023)
Myroslava Hladchenko
https://arxiv.org/abs/2508.08850

APCs and citation impact of Gold OA articles authored by Ukrainian scholars before and during Russia's full-scale war against Ukraine (2020-2023)
This study examines how Russia's full-scale war against Ukraine affected APCs, publishing patterns, and citation impact of Gold OA articles authored by Ukrainian scholars between 2020 and 2023. Data from Scopus covers articles published before (2020-2021) and after (2022-2023) the war's onset. Statistical analysis revealed a small but significant correlation between APC amounts and citation impact, though the effect size was minimal, suggesting higher APCs did not substantially boost citations.…