Tootfinder

Virtuelle Raumstation: Vast bringt Haven-1 als VR-Erlebnis auf Steam
Die erste kommerzielle Raumstation der Welt ist noch vor dem Start ins All als Virtual-Reality-Erlebnis verfügbar – inklusive Blick auf die Erde.

Por si acaso estoy de cumpleaños el 19 de julio 🙄
Ref: https://www.rockaxis.com/vanguardia/noticia/46983/ya-esta-disponible-la-nueva-version-remasterizada-de-peluson-of-milk-de-luis-al…

Probing quadratic gravity with black-hole ringdown gravitational waves measured by LIGO-Virgo-KAGRA detectors
Adrian Ka-Wai Chung, Nicol\'as Yunes
https://arxiv.org/abs/2506.14695

Probing quadratic gravity with black-hole ringdown gravitational waves measured by LIGO-Virgo-KAGRA detectors
Quadratic gravity theories emerge as the low-energy limit of many grand-unified and quantum-gravity theories. We report the first gravitational-wave ringdown constraints on such theories obtained purely from the quasinormal-mode spectra of rapidly-spinning black-hole remnants. We find no quadratic-gravity signatures from ringdown signals measured by the LIGO-Virgo-KAGRA detectors, thereby constraining the coupling length scale of axi-dilaton gravity below 34 km, dynamical Chern-Simons gravity b…

Bram Cohen on algorithms for determining the winner in ranked-choice voting: More complicated than you might think.
https://bramcohen.com/p/variants-on-instant-runoff

Variants on Instant Runoff
A practical view

Looking at #ADSBexchange, the US is moiving a LOT of equipment towards #Ramstein and the ME
Less interesting times, please
#adsb

Very excited that we’ve just announced the game I’ve been working on for nearly four years — Spirit Crossing! It’s a cozy MMO for mobile that aims to help people build positive connections online.
https://youtu.be/RNGs3tLPaF0
Sign up for our upcoming alpha here:

A ringed-space-like structure on coalgebras for noncommutative algebraic geometry
So Nakamura
https://arxiv.org/abs/2506.14689 https://

A ringed-space-like structure on coalgebras for noncommutative algebraic geometry
Inspired by the perspective of Reyes' noncomutative spectral theory, we attempt to develop noncommutative algebraic geometry by introducing ringed coalgebras, which can be thought of as a noncommutative generalization of schemes over a field $k$. These objects arise from fully residually finite-dimensional(RFD) algebras introduced by Reyes and from schemes locally of finite type over $k$. The construction uses the Heyneman-Sweedler finite dual coalgebra and the Takeuchi underlying coalgebra. Wh…

Earlier this week, a federal judge in Boston explicitly called out the Trump administration for its
“palpably clear” discrimination against racial minorities
and LGBTQ Americans
in a case involving canceled grants from the National Institutes of Health.
“Have we no shame?”
Judge William Young asked,
in an unmistakeable echo of attorney Joseph Welch,
who famously punctured Joe McCarthy’s popularity with his simple plea for decency.
Seventy-fiv…

Judge rules that anti-woke is just racism
You can put lipstick on a pig, but it's still a rancid bigot.

Weiteres Leck der ISS verzögert die nächste kommerzielle Axiom-Weltraummission
Die Internationale Raumstation verliert erneut Luftdruck, nachdem gerade erst ein Leck abgedichtet wurde. Die Mission Ax-4 startet daher frühestens Donnerstag.

The AdS Perspective on the Nonlinear Tails in Black Hole Ringdown
Alex Kehagias, Antonio Riotto
https://arxiv.org/abs/2506.14475 https://

The AdS Perspective on the Nonlinear Tails in Black Hole Ringdown
Black holes gradually settle into their static configuration by emitting gravitational waves, whose amplitude diminish over time according to a power-law decay at fixed spatial locations. We show that the nonlinear tails in the presence of a quadratic source, which have been recently found to potentially dominate over the linear ones, can be simply derived from the AdS$_2$$\times$S$^2$ spacetime perspective with their amplitudes being related to the Aretakis constants.