Tootfinder

Beating the Logarithmic Barrier for the Subadditive Maximin Share Problem
Masoud Seddighin, Saeed Seddighin
https://arxiv.org/abs/2506.05613 https://

Beating the Logarithmic Barrier for the Subadditive Maximin Share Problem
We study the problem of fair allocation of indivisible goods for subadditive agents. While constant-\textsf{MMS} bounds have been given for additive and fractionally subadditive agents, the best existential bound for the case of subadditive agents is $1/O(\log n \log \log n)$. In this work, we improve this bound to a $1/O((\log \log n)^2)$-\textsf{MMS} guarantee. To this end, we introduce new matching techniques and rounding methods for subadditive valuations that we believe are of independent …

Towards an Application-Centric Benchmark Suite for Spatiotemporal Database Systems
Tim C. Rese, David Bermbach
https://arxiv.org/abs/2507.05869 https://

Towards an Application-Centric Benchmark Suite for Spatiotemporal Database Systems
Spatiotemporal data play a key role for mobility-based applications and are their produced volume is growing continuously, among others, due to the increased availability of IoT devices. When working with spatiotemporal data, developers rely on spatiotemporal database systems such as PostGIS or MobilityDB. For better understanding their quality of service behavior and then choosing the best system, benchmarking is the go-to approach. Unfortunately, existing work in this field studies only…

Spatiotemporal coupled Airy-Airy wavepacket and its propagation dynamics
Zhaofeng Huang, Xiaolin Su, Qian Cao, Andy Chong, Qiwen Zhan
https://arxiv.org/abs/2506.05805

Spatiotemporal coupled Airy-Airy wavepacket and its propagation dynamics
Airy beams, celebrated for their self-acceleration, diffraction-free propagation, and self-healing properties, have garnered significant interest in optics and photonics, with applications spanning ultrafast optics, laser processing, nonlinear optics, and optical communications. Recent research primarily aims at independent control of Airy beams in both spatial and spatiotemporal domains. In a pioneering approach, we have successfully generated and controlled a spatiotemporal coupled (STc) Airy…

A look at the ~$377 TranscribeGlass smart glasses that use AI to subtitle conversations in nearly real time, built for the deaf or hard-of-hearing (Boone Ashworth/Wired)
https://www.wired.com/story/these-translating-ai-glasses-put-subtitles-on-…

These Transcribing Eyeglasses Put Subtitles on the World
TranscribeGlass can subtitle conversations in nearly real time and will soon be able to translate languages and tell you when the person you’re talking to you is feeling socially awkward.

Ted Cruz was sightseeing in Athens as first responders began launching search and rescue operations back home, The Daily Beast reports.
The senator reportedly landed in Greece on Thursday, July 3;
was spotted at the Parthenon on Saturday, July 5;
and is believed to have not caught a plane to San Antonio, Texas, until Sunday.
The Daily Beast’s report recalls the infamous February 2021 incident
in which the senator took a trip to Cancun, Mexico,
during a hi…

Ted Cruz Caught Vacationing as Texas Suffered Deadly Floods
“Twenty dead kids and you’re on vacation?” someone asked the Texas senator after spotting him abroad.

Quantum cluster algebras and representations of shifted quantum affine algebras
Francesca Paganelli
https://arxiv.org/abs/2507.05008 https://

Quantum cluster algebras and representations of shifted quantum affine algebras
We construct a new quantization $K_t(\mathcal{O}^{sh}_{\mathbb{Z}})$ of the Grothendieck ring of the category $\mathcal{O}^{sh}_{\mathbb{Z}}$ of representations of shifted quantum affine algebras (of simply-laced type). We establish that our quantization is compatible with the quantum Grothendieck ring $K_t(\mathcal{O}^{\mathfrak{b},+}_{\mathbb{Z}})$ for the quantum Borel affine algebra, namely that there is a natural embedding $K_t(\mathcal{O}^{\mathfrak{b},+}_{\mathbb{Z}})\hookrightarrow K_t(…

A gravitational acceleration model to explain the double-peaked narrow emission lines shifted in the same direction
XingQian Chen, GuiLin Liao, Qi Zheng, XueGuang Zhang
https://arxiv.org/abs/2507.04320

A gravitational acceleration model to explain the double-peaked narrow emission lines shifted in the same direction
In this manuscript, we propose, for the first time, an oversimplified but potentially effective gravitational acceleration model to interpret the double-peaked narrow emission lines (DPNELs) shifted in the same direction. We adopt the framework of a merging kpc-scale dual-core system in an elliptical orbit, which has an emission-line galaxy with clear narrow line regions (NLRs) merging with a companion galaxy lacking emission line features. Due to gravitational forces induced by both galaxies o…

I spotted Dr Pizzabutt Jimmathy the 3rd at the airport! Squeee

Towards Serverless Processing of Spatiotemporal Big Data Queries
Diana Baumann, Tim C. Rese, David Bermbach
https://arxiv.org/abs/2507.06005 https://

Towards Serverless Processing of Spatiotemporal Big Data Queries
Spatiotemporal data are being produced in continuously growing volumes by a variety of data sources and a variety of application fields rely on rapid analysis of such data. Existing systems such as PostGIS or MobilityDB usually build on relational database systems, thus, inheriting their scale-out characteristics. As a consequence, big spatiotemporal data scenarios still have limited support even though many query types can easily be parallelized. In this paper, we propose our vision of a nativ…

Tel Aviv-based Speedata, which is designing analytics processing units for big data workloads, raised a $44M Series B, aims to showcase its first APU this month (Kate Park/TechCrunch)
https://techcrunch.com/2025/06/03/speedata…

Speedata, a chip startup competing with Nvidia, raises a $44M Series B | TechCrunch
Speedata, a Tel Aviv-based startup developing an analytics processing unit (APU) designed to accelerate big data analytic and AI workloads, has raised a Founded by six researcher, Speedata wants to build the first-ever purpose-build chip designed specifically for big data workloads.