Tootfinder

Analysis of collision shift assessments in ion-based clocks
M. D. Barrett, K. J. Arnold
https://arxiv.org/abs/2512.05474 https://arxiv.org/pdf/2512.05474 https://arxiv.org/html/2512.05474
arXiv:2512.05474v1 Announce Type: new
Abstract: We consider back-ground gas collision shifts in ion-based clocks. We give both a classical and quantum description of a collision between an ion and a polarizable particle with a simple hard-sphere repulsion. Both descriptions give consistent results, which shows that a collision shift bound is determined by the classical Langevin collision rate reduced by a readily calculated factor describing the decoupling of the clock laser from the ion due to the recoil motion. We also show that the result holds when using a more general Lennard-Jones potential to describe the interaction between the ion and its collision partner. This leads to a simple bound for the collision shift applicable to any single ion clock without resorting to large-scale Monte-Carlo simulations or determination of molecular potential energy curves describing the collision. It also provides a relatively straightforward means to measure the relevant collision rate.
toXiv_bot_toot

celegans_2019: Complete C. elegans neurons (2019)
Networks among neurons of both the adult male and adult hermaphrodite worms C. elegans, constructed from electron microscopy series, to include directed edges (chemical) and undirected (gap junction), and spanning including nodes for muscle and non-muscle end organs.
This network has 514 nodes and 2363 edges.
Tags: Biological, Connectome, Weighted

Trump's "Donroe Doctrine" sets U.S. on great-power collision course (Zachary Basu/Axios)
https://www.axios.com/2026/01/08/trumps-donroe-doctrine-sets-us-on-great-power-collision-course
http://www.memeorandum.com/260108/p15#a260108p15

Precise and Efficient Collision Prediction under Uncertainty in Autonomous Driving
Marc Kaufeld, Johannes Betz
https://arxiv.org/abs/2510.05729 https://arx…

Precise and Efficient Collision Prediction under Uncertainty in Autonomous Driving
This research introduces two efficient methods to estimate the collision risk of planned trajectories in autonomous driving under uncertain driving conditions. Deterministic collision checks of planned trajectories are often inaccurate or overly conservative, as noisy perception, localization errors, and uncertain predictions of other traffic participants introduce significant uncertainty into the planning process. This paper presents two semi-analytic methods to compute the collision probabili…

Space-time geometry of small and large collision systems at LHC energies
Thomas A. Trainor
https://arxiv.org/abs/2510.05314 https://arxiv.org/pdf/2510.0531…

Space-time geometry of small and large collision systems at LHC energies
Identified-hadron (PID) spectra from 2.76 TeV Pb-Pb and $p$-$p$ collisions are analyzed via a two-component (soft + hard) model (TCM) of hadron production in high-energy nuclear collisions. The Pb-Pb TCM is adopted with minor changes from a recent analysis of PID hadron spectra from 5 TeV $p$-Pb collisions. The object of study is evidence for jet suppression in small and large collision systems as indicating quark-gluon plasma (QGP) formation there. Conventional methods have included Pb-Pb cent…

Na, da is ja noch Luft, wa?!
Hö hö. 🤪
https://social.cologne/@GeorgEhring/115509803882110628

Libraries scramble to find another print book provider after Baker & Taylor, once the largest US distributor of print books to public libraries, shuts down (NPR)
https://www.npr.org/2026/01/07/nx-s1-5668426/libraries-books-distributor-closing

First printed in 1818...
Americans stunned as mainstay forecaster Farmers’ Almanac folds after two centuries: ‘One of the saddest days in history’ | The Independent
https://www.independent.co.uk/news/world/americas/farmers-almanac-closing-last-edition-b2860557.html

A Small Collusion is All You Need
Yotam Gafni
https://arxiv.org/abs/2510.05986 https://arxiv.org/pdf/2510.05986

A Small Collusion is All You Need
Transaction Fee Mechanisms (TFMs) study auction design in the Blockchain context, and emphasize robustness against miner and user collusion, moreso than traditional auction theory. \cite{chung2023foundations} introduce the notion of a mechanism being $c$-Side-Contract-Proof ($c$-SCP), i.e., robust to a collusion of the miner and $c$ users. Later work \cite{chung2024collusion,welfareIncreasingCollusion} shows a gap between the $1$-SCP and $2$-SCP classes. We show that the class of $2$-SCP mechan…

Block Communications announces that The Pittsburgh Post-Gazette will cease publication May 3; the closure will not affect its sister newspaper, The Toledo Blade (Mark Walker/New York Times)
https://www.nytimes.com/2026/01/07/business/media/pittsburgh-po…

Pittsburgh Post-Gazette Announces It Will Cease Operations
The family-owned company that operates the newspaper cited mounting losses and labor constraints. A final edition is expected on Sunday, May 3.