Tootfinder

City Features VII 🏙️
城市特征 VII 🏙️
📷 Nikon FE
🎞️Ilford FP4 Plus, expired 1994
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

I went for a short ride today, and every now and then I would hear this weird “cling clang” sound, but I couldn’t figure out what the hell it was. I even stopped twice to investigate. It wasn’t constant though, just intermittent. Urgh!
Got home, took a photo, and then figured it out. Sigh…
#biking #bikeTooter

A senior CIA officer who oversaw Russia analysis
has been stripped of her security clearance,
part of a sweeping removal of
37 serving and former officials accused of "betray[ing] their oath to the Constitution," the Economist reported on Aug. 21.
The officer, who served as the CIA’s top Russia and Eurasia analyst during the 2016 election
and helped produce the report detailing Moscow’s interference on behalf of Donald Trump,
was among the most s…

Trump administration escalates purge of senior US intelligence officials, Economist reports
The officer, who served as the CIA’s top Russia and Eurasia analyst during the 2016 election and helped produce the report detailing Moscow’s interference on behalf of Donald Trump, was among the most senior career officials targeted.

Recently I installed #wanderer on my home server via docker compose.
Connected my wife's strava and tried to upload some GPX files.
The strava routes are imported, the according statistics show all zero.
My GPX can't be uploaded due to some elevation error.
😔
Maybe I'll formulate some bug report next weekend.

On Ternary Trees and Fighting Fish
Sen-Peng Eu, Tung-Shan Fu, Yen-Jen Pan
https://arxiv.org/abs/2509.16667 https://arxiv.org/pdf/2509.16667

On Ternary Trees and Fighting Fish
Fighting fish is a combinatorial configuration introduced by Duchi et al. as a new model of branching surfaces that generalizes directed convex polyominoes. We come up with an alternative construction of fighting fish, using a tree structure built on the so-called stem cells of fighting fish. From this perspective, we establish a bijection between ternary trees and fighting fish with a marked strip of cells, which specializes to a direct bijection between left ternary trees and fighting fish. U…

Bounded ribbonlength for knot families and multi-twist M\"obius bands
Elizabeth Denne, Timi Patterson
https://arxiv.org/abs/2509.18370 https://arxiv.o…

Bounded ribbonlength for knot families and multi-twist Möbius bands
Take a thin, rectangular strip of paper, add in an odd number of half-twists, then join the ends together. This gives a multi-twist paper Möbius band. We prove that any multi-twist paper Möbius band can be constructed so the aspect ratio of the rectangle is $3\sqrt{3}+ε$ for any $ε>0$. We could also take the thin, rectangular strip of paper and tie a knot in it, then join the ends and fold flat in the plane. This creates a folded ribbon knot. We apply the techniques used to prove the multi-…

On the Boundary of the Robust Admissible Set in State and Input Constrained Nonlinear Systems
Franz Ru{\ss}wurm, Jean L\'evine, Stefan Streif
https://arxiv.org/abs/2509.18825

On the Boundary of the Robust Admissible Set in State and Input Constrained Nonlinear Systems
In this paper, we consider nonlinear control systems subject to bounded disturbances and to both state and input constraints. We introduce the definition of robust admissible set - the set of all initial states from which the state and input constraints can be satisfied for all times against all admissible disturbances. We focus on its boundary that can be decomposed into the usable part on the state constraint boundary and the barrier, interior to the state constraints. We show that, at the in…

StereoFoley: Object-Aware Stereo Audio Generation from Video
Tornike Karchkhadze (Moji), Kuan-Lin Chen (Moji), Mojtaba (Moji), Heydari, Robert Henzel, Alessandro Toso, Mehrez Souden, Joshua Atkins
https://arxiv.org/abs/2509.18272

Constraining the Mass Loss and the Kinetic Energy of Solar Coronal Mass with Far-Ultraviolet Flares
Nuri Park, Evgenya L. Shkolnik, Joe Llama
https://arxiv.org/abs/2509.16477 ht…

Constraining the Mass Loss and the Kinetic Energy of Solar Coronal Mass with Far-Ultraviolet Flares
Stellar eruptive events, such as flares and coronal mass ejections (CMEs), can affect planetary habitability by disturbing the stability of their atmospheres. For instance, strong stellar flares and CMEs can trigger atmospheric escape and, in extreme cases, may strip away the atmosphere completely. While stellar flares have been observed and explored at a wide range of wavelengths, the physical properties of stellar CMEs remain unconstrained due to the difficulty in observing them. In this cont…