Tootfinder

Fagin's Theorem for Semiring Turing Machines
Guillermo Badia, Manfred Droste, Thomas Eiter, Rafael Kiesel, Carles Noguera, Erik Paul
https://arxiv.org/abs/2507.18375 https:/…

Fagin's Theorem for Semiring Turing Machines
In recent years, quantitative complexity over semirings has been intensively investigated. An important problem in this context is to connect computational complexity with logical expressiveness. In this paper we improve on the model of \emph{Semiring Turing Machines} (distinct from so called weighted Turing machines) introduced by Eiter \& Kiesel (Semiring Reasoning Frameworks in AI and Their Computational Complexity, \emph{J. Artif. Intell. Res.}, 2023). Our central result is a Fagin-style th…

Wirtschaftsinstitut: IT-Fachkräfte sind in Deutschland deutlich weniger gefragt
Die durchschnittliche Zahl offener Stellen in IT-Berufen hat sich 2024 gegenüber 2023 um 26 Prozent reduziert. Gerade Experten mit Uni-Abschluss sind betroffen.

Maar een kwart 😃 , prima score
#politiek

Kwart kiezers is vertrouwen kwijt in alle politieke partijen: 'Neem ze niet meer serieus'
Een kwart van de kiezers is het vertrouwen in alle politieke partijen kwijt. Dat blijkt uit onderzoek van het RTL Nieuwspanel. Het gevoel leeft zeer sterk bij kiezers die bij de laatste Tweede Kamerverkiezingen in 2023 nog op Nieuw Sociaal Contract stemden (32 procent), maar ook bij mensen die toen voor de BBB (28 procent) of PVV (26 procent) kozen.

Exploring Each DreamState Deeply #dreams #inspiration #puppy

Exploring Each DreamState Deeply
Stan Stewart - @muz4now

Apple says its design team will report to Tim Cook after Jeff Williams retires; Williams was overseeing the team following Evans Hankey's departure in 2023 (Chance Miller/9to5Mac)
https://9to5mac.com/2025/07/08/apple-design-team-tim-cook/

Apple design team to start reporting directly to Tim Cook later this year - 9to5Mac
Apple today announced that COO Jeff Williams will retire later this year, with Sabih Khan set to assume the COO...

Fermi-GBM Observations of GRB 230307A: An Exceptionally Bright Long-Duration Gamma-ray Burst with an Associated Kilonova
S. Dalessi, P. Veres, C. M. Hui, S. Bala, S. Lesage, M. S. Briggs, A. Goldstein, E. Burns, C. A. Wilson-Hodge, C. Fletcher, O. J. Roberts, P. N. Bhat, E. Bissaldi, W. H. Cleveland, M. M. Giles, M. Godwin, R. Hamburg, B. A. Hristov, D. Kocevski, B. Mailyan, C. Malacaria, O. Mukherjee, L. Scotton, A. von Kienlin, J. Wood

Fermi-GBM Observations of GRB 230307A: An Exceptionally Bright Long-Duration Gamma-ray Burst with an Associated Kilonova
On March 7th, 2023 the \textit{Fermi} Gamma-ray Burst Monitor observed the second highest fluence gamma-ray burst (GRB) ever, GRB~230307A. With a duration beyond 100~s, GRB~230307A contains a multitude of rapidly-varying peaks, and was so bright it caused instrumental effects in the GBM detectors. The high fluence of this burst, (6.02 $\pm$ 0.02)$\times$10$^{-3}$ erg cm$^{-2}$, prompted rapid follow-up across the electro magnetic spectrum including the discovery of an associated kilonova. GRB~2…

Kernel Learning for Mean-Variance Trading Strategies
Owen Futter, Nicola Muca Cirone, Blanka Horvath
https://arxiv.org/abs/2507.10701 https://

Kernel Learning for Mean-Variance Trading Strategies
In this article, we develop a kernel-based framework for constructing dynamic, pathdependent trading strategies under a mean-variance optimisation criterion. Building on the theoretical results of (Muca Cirone and Salvi, 2025), we parameterise trading strategies as functions in a reproducing kernel Hilbert space (RKHS), enabling a flexible and non-Markovian approach to optimal portfolio problems. We compare this with the signature-based framework of (Futter, Horvath, Wiese, 2023) and demonstrat…

Tödlicher Titanic-Tauchgang: Vernichtender Untersuchungsbericht
Auf dem Weg zur Titanic implodierte im Sommer 2023 das Kohlefaser-Tauchboot Titan. Eine Untersuchung lässt kein gutes Haar an den Betreibern.
h…

I had reason to break out my very brief tutorial on styling links and buttons today:
https://adrianroselli.com/2023/08/styling-links-and-buttons.html
I wrote it because I’ve encountered many devs who use the wrong element claiming they can’t style …

Styling Links and Buttons
I made a tutorial for styling links and buttons, something which many developers have struggled with (resulting in links used as buttons and buttons used as links). I have embedded it on this page, but if you are coming in with your RSS reader you can visit the tutorial directly…

„The Explorers“ by Critikill
Platform: Amiga
Released: 26 August 2023
Note: 2nd in the Xenium 2023 Oldschool GFX competition
#GFX_Critikill #YR_2023 #PF_Amiga

Big sad that I just found that #fireship got bought by a private equity firm in 2023. That explains why it recently became a slop machine just constantly publishing about AI.
Good for him getting the money he deserves, but the content isn't worth watching anymore in my opinion it's just the same "AI is going to take your job, buy this AI tool".

Nepo baby or late bloomer? Former 6th rounder has front office, Cowboys coaching connect https://cowboyswire.usatoday.com/story/sports/nfl/cowboys/2025/08/03/dallas-cowboys-player-profile-no-42-rb-deuce-vaughn/85…

Was für ein Spieltag in der #Erima-GFL #AmericanFootball
https://www.football-aktuell.de/cgi-bin…

from my link log —
There is no software maintenance.
https://henrikwarne.com/2023/01/07/there-is-no-software-maintenance/
saved 2023-01-08

Einige der zuletzt hier besonders häufig geteilten #News:
Überwachung: Strafverfolger setzen erneut mehr Staatstrojaner ein

"Antarctic ice has grown again – but this does not buck overall melt trend"
#Antarctic #Climate #ClimateChange

Evolution of QPO During Discovery Outburst of MAXI J1834-021: Estimation of Intrinsic Parameters from Spectro-Temporal Study
Dipak Debnath, Hsiang-Kuang Chang
https://arxiv.org/abs/2506.10267

Evolution of QPO During Discovery Outburst of MAXI J1834-021: Estimation of Intrinsic Parameters from Spectro-Temporal Study
The Galactic transient black hole candidate (BHC) MAXI~J1834-021 was detected for the first time by MAXI/GSC on February 05, 2023 and it was active for next $\sim 10$~months. A monotonic evolution of low-frequency QPOs from higher to lower frequencies is observed in the middle-phase of the outburst. We study this evolution of the QPO with the propagating oscillatory shock (POS) model, and it suggests the presence of a receding shock. The POS model fit also estimates the mass of the source to be…

Weekend #Plankton Factoid 🦠🦐
27 M tonnes. Dutch NIOZ scientists found that nanoplastics (<1 μm) are not only widespread, but equivalent to the mass of macro & microplastics! Polyethylene terephthalate (PET), polystyrene (PS) and polyvinyl chloride (PVC) #plastics don't just float on th…

The NetMob25 Dataset: A High-resolution Multi-layered View of Individual Mobility in Greater Paris Region
Alexandre Chasse, Anne J. Kouam, Aline C. Viana, Razvan Stanica, Wellington V. Lobato, Geymerson Ramos, Geoffrey Deperle, Abdelmounaim Bouroudi, Suzanne Bussod, Fernando Molano
https://arxiv.org/abs/2506.05903

The NetMob25 Dataset: A High-resolution Multi-layered View of Individual Mobility in Greater Paris Region
High-quality mobility data remains scarce despite growing interest from researchers and urban stakeholders in understanding individual-level movement patterns. The Netmob25 Data Challenge addresses this gap by releasing a unique GPS-based mobility dataset derived from the EMG 2023 GNSS-based mobility survey conducted in the Ile-de-France region (Greater Paris area), France. This dataset captures detailed daily mobility over a full week for 3,337 volunteer residents aged 16 to 80, collected betw…

Blameless Users in a Clean Room: Defining Copyright Protection for Generative Models
Aloni Cohen
https://arxiv.org/abs/2506.19881 https://

Blameless Users in a Clean Room: Defining Copyright Protection for Generative Models
Are there any conditions under which a generative model's outputs are guaranteed not to infringe the copyrights of its training data? This is the question of "provable copyright protection" first posed by Vyas, Kakade, and Barak (ICML 2023). They define near access-freeness (NAF) and propose it as sufficient for protection. This paper revisits the question and establishes new foundations for provable copyright protection -- foundations that are firmer both technically and legally. First, we sho…

Statistical analysis of interplanetary shock waves measured by a Solar Wind Analyzer and a magnetometer onboard the Solar Orbiter Mission in 2023
Oleksandr Yakovlev, Oleksiy Dudnik, Anna Wawrzaszek
https://arxiv.org/abs/2506.19986

Statistical analysis of interplanetary shock waves measured by a Solar Wind Analyzer and a magnetometer onboard the Solar Orbiter Mission in 2023
Interplanetary (IP) shock waves are greatly interesting, as they represent significant phenomena in near-Earth space and are direct drivers of geomagnetic and radiation storms. Moreover, various data and parameters are being explored for the identification and characterization of these waves. The spatial dimensions of shock waves vary significantly with the conditions and parameters of the propagating medium. For example, the radii of curvature of the shock wave fronts can vary by several hundr…

Teil der deutschen Produktionsketten (II) https://www.german-foreign-policy.com/news/detail/10082

The HST-Gaia Near-Infrared Astrometric Reference Frame near the Milky Way Galactic Center
Matthew W. Hosek Jr., Tuan Do, Gregory D. Martinez, Rebecca Lewis-Merrill, Andrea M. Ghez, Jessica R. Lu, Shoko Sakai, Jay Anderson
https://arxiv.org/abs/2506.19933

The HST-Gaia Near-Infrared Astrometric Reference Frame near the Milky Way Galactic Center
We present the first high-precision proper motion catalog, tied to the International Celestial Reference System (ICRS), of infrared astrometric reference stars within R $\leq$ 25" (1 pc) of the central supermassive black hole at the Galactic center (GC). This catalog contains $\sim$2,900 sources in a highly extinguished region that is inaccessible via Gaia. New astrometric measurements are extracted from HST observations (14 epochs, 2010 - 2023) and transformed into the ICRS using 40 stars in c…

Energy-dependent anisotropy of cosmic-ray muons: A twelve-year study with IceCube Neutrino Observatory
Nabin Upadhya Dhakal, Nabin Bhusal, Manjeet Kunwar, Manil Khatiwada, Shiv Narayan Yadav
https://arxiv.org/abs/2508.01194

Energy-dependent anisotropy of cosmic-ray muons: A twelve-year study with IceCube Neutrino Observatory
We present a comprehensive, energy-resolved study of cosmic-ray muon anisotropy using 12 years (2011-2023) of data from the IceCube Neutrino Observatory, comprising 7.92 x 10^11 events in the 13 TeV to 5.3 PeV energy range. Dividing the spectrum at log-scale energy 5 GeV, we contrast low- and high-energy anisotropy features via sidereal modulation, angular profiles, Fourier analysis, and full-sky HEALPix mapping. Gaussian and power-law fits to energy distributions are evaluated using chi-square…

Sharif hat - wenn seine Social-Media-Posts verifiziert werden können - in Al-Jazeera-Linie die Hamas und ihre Terroristen als Helden bezeichnet und den Angriff auf Israel & Israelis am 7. Oktober 2023 ursprünglich gefeiert.
Das ist absolut zu verurteilen, aber so überraschend ist es nicht.

Secure Multi-Key Homomorphic Encryption with Application to Privacy-Preserving Federated Learning
Jiahui Wu, Tiecheng Sun, Fucai Luo, Haiyan Wang, Weizhe Zhang
https://arxiv.org/abs/2506.20101

Secure Multi-Key Homomorphic Encryption with Application to Privacy-Preserving Federated Learning
Multi-Key Homomorphic Encryption (MKHE), proposed by Lopez-Alt et al. (STOC 2012), allows for performing arithmetic computations directly on ciphertexts encrypted under distinct keys. Subsequent works by Chen and Dai et al. (CCS 2019) and Kim and Song et al. (CCS 2023) extended this concept by proposing multi-key BFV/CKKS variants, referred to as the CDKS scheme. These variants incorporate asymptotically optimal techniques to facilitate secure computation across multiple data providers. In this…

Daily fluctuations propagate damply through a black hole accretion disk
Han He, Yi Long, Bei You, Fu-Guo Xie, Zhen Yan, Andrzej A. Zdziarski, Sai-En Xu
https://arxiv.org/abs/2508.01384

Daily fluctuations propagate damply through a black hole accretion disk
Propagating fluctuations within accretion disks are known to induce multi-wavelength variability across diverse timescales. While these fluctuations have been widely invoked to explain rapid timing phenomena within the inner disk region in the frequency domain, observational signatures of outer-disk fluctuations propagating in the time domain remain sparse. Here, we present an analysis of observations by the Hard X-ray Modulation Telescope (HXMT) during the 2023 outburst of the newly discovered…

X-ray Polarization Detection of the Pulsar Wind Nebula in G21.5-0.9 with IXPE
Niccol\`o Di Lalla, Nicola Omodei, Niccol\`o Bucciantini, Jack T. Dinsmore, Nicol\`o Cibrario, Stefano Silvestri, Josephine Wong, Patrick Slane, Tsunefumi Mizuno, Michela Negro, Roger W. Romani, Riccardo Ferrazzoli, Stephen Chi-Yung Ng, Miltiadis Michailidis, Yi-Jung Yang, Fei Xie, Martin C. Weisskopf, Philip Kaaret, Iv\'an Agudo, L. A. Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronal…

X-ray Polarization Detection of the Pulsar Wind Nebula in G21.5-0.9 with IXPE
We present the X-ray polarization observation of G21.5-0.9, a young Galactic supernova remnant (SNR), conducted with the Imaging X-ray Polarimetry Explorer (IXPE) in October 2023, with a total livetime of approximately 837 ks. Using different analysis methods, such as a space-integrated study of the entire region of the PWN and a space-resolved polarization map, we detect significant polarization from the pulsar wind nebula (PWN) at the center of the SNR, with an average polarization degree of …

Multi-wavelength Study of HESS J0632 057: New Insights into Pulsar-Disk Interaction
Jaegeun Park (Chungbuk National University), Hongjun An (Chungbuk National University), Chanho Kim (Chungbuk National University), Natalie Matchett (University of the Free State), Kaya Mori (Columbia University), Brian van Soelen (University of the Free State), VERITAS Collaboration, :, A. Archer, P. Bangale, J. T. Bartkoske, W. Benbow, J. H. Buckley, Y. Chen, A. J. Chromey, A. Duerr, M. Errando, M. Es…

Multi-wavelength Study of HESS J0632+057: New Insights into Pulsar-Disk Interaction
We present an analysis of new multi-wavelength observations of the TeV gamma-ray binary HESS J0632+057, conducted using SALT, Swift, NuSTAR, and VERITAS in 2023--2024. By combining these new data with archival observations, we confirm previous suggestions of orbital variability in the source's X-ray spectrum, including increased X-ray absorption at the orbital phase interval of $ϕ\approx0.3\textrm{--}0.4$. The source's X-ray flux within this phase interval seems to have exhibited a significant…

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 …

Insight-HXMT Spectral and Timing Studies of a Giant Outburst in RX J0440.9 4431
Prahlad R. Epili, Wei Wang
https://arxiv.org/abs/2507.18676 https://arxiv.o…

Insight-HXMT Spectral and Timing Studies of a Giant Outburst in RX J0440.9+4431
The Be/X-ray binary pulsar RX J0440.9+4431 underwent a giant outburst in late 2022 and lasted three months. The Insight-HXMT has observed this source at several instances of the entire outburst in 2022-2023. We used these bright outburst observations of the pulsar to study its X-ray spectral and timing variability. The pulse profiles obtained at similar luminosity during the progress and declining phases of the outburst show a similar shape behavior.With the increase in source luminosity, the c…