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@arXiv_physicsgenph_bot@mastoxiv.page
2025-11-12 08:39:29

Non-Gravitational Acceleration in 3I ATLAS: Constraints on Exotic Volatile Outgassing in Interstellar Comets
Florian Neukart
arxiv.org/abs/2511.07450 arxiv.org/pdf/2511.07450 arxiv.org/html/2511.07450
arXiv:2511.07450v1 Announce Type: new
Abstract: The interstellar comet 3I/ATLAS exhibited a measurable nongravitational acceleration similar in form to that of 1I/'Oumuamua but of smaller magnitude. Using thermophysical and Monte Carlo models, we show that this acceleration can be fully explained by anisotropic outgassing of conventional volatiles, primarily CO and CO2, under realistic surface and rotational conditions. The model includes diurnal and obliquity-averaged energy balance, empirical vapor-pressure relations, and collimated jet emission from localized active regions. Mixed CO-CO2 compositions reproduce both the magnitude and direction of the observed acceleration with physically plausible active fractions below one percent for nucleus radii between 0.5 and 3 km. Less volatile species such as NH3 and CH4 underproduce thrust at equilibrium temperatures near 1 AU. These results eliminate the need for nonphysical or exotic explanations and define thermophysical limits for natural acceleration mechanisms in interstellar comets.
toXiv_bot_toot

@toxi@mastodon.thi.ng
2026-02-09 13:27:54

For some years now the UI design and interaction methods shown in sci-fi movies have become ever more abstract & complex, driven by minimalist aesthetics utilizing high-res graphics, a design philosophy based on total omniscient access, heavy information density and interactive realtime visualizations (and/or visual ways of browsing) to aid exploration & expose patterns/relationships, the use of layered/spatial layouts, capable of customization/personalization, programmability (of so…

@arXiv_qbioNC_bot@mastoxiv.page
2025-12-10 08:38:00

Manifolds and Modules: How Function Develops in a Neural Foundation Model
Johannes Bertram, Luciano Dyballa, T. Anderson Keller, Savik Kinger, Steven W. Zucker
arxiv.org/abs/2512.07869 arxiv.org/pdf/2512.07869 arxiv.org/html/2512.07869
arXiv:2512.07869v1 Announce Type: new
Abstract: Foundation models have shown remarkable success in fitting biological visual systems; however, their black-box nature inherently limits their utility for under- standing brain function. Here, we peek inside a SOTA foundation model of neural activity (Wang et al., 2025) as a physiologist might, characterizing each 'neuron' based on its temporal response properties to parametric stimuli. We analyze how different stimuli are represented in neural activity space by building decoding man- ifolds, and we analyze how different neurons are represented in stimulus-response space by building neural encoding manifolds. We find that the different processing stages of the model (i.e., the feedforward encoder, recurrent, and readout modules) each exhibit qualitatively different representational structures in these manifolds. The recurrent module shows a jump in capabilities over the encoder module by 'pushing apart' the representations of different temporal stimulus patterns; while the readout module achieves biological fidelity by using numerous specialized feature maps rather than biologically plausible mechanisms. Overall, we present this work as a study of the inner workings of a prominent neural foundation model, gaining insights into the biological relevance of its internals through the novel analysis of its neurons' joint temporal response patterns.
toXiv_bot_toot

@fanf@mendeddrum.org
2026-02-09 09:42:04

from my link log —
Arcan-A12: Weaving a different web.
divergent-desktop.org/blog/202
saved 2026-02-07

"The old world is dying,” Antonio Gramsci once wrote.
“And the new world struggles to be born.”
In such interregnums, the Italian Marxist philosopher suggested, “every act, even the smallest,
may acquire decisive weight”.
In 2025, western leaders appeared convinced they – and we – were living through one such transitional period, as the world of international relations established after the second world war crashed to a halt.
During such eras, Gramsci more f…

@hex@kolektiva.social
2025-11-21 18:54:12

Any sufficiently advanced disaster preparedness is indistinguishable from revolutionary dual power. This essay is a bit of a transition between the theory I've written earlier, and more concrete plans.
Even though I only touched on my life on the commune, it was hard not to write more. These are such weird spaces, with so much invisible opportunity. But they're also just so unique and special. For all the stress and uncertainty of making sure you stayed on Lorean's (the head priestess), there were also those long summer nights with the whole community (except the old lady) gathered around a fire, talking and drinking. There was almost a child-like play to the whole time.
There were so Fridays I'd come home with a couple of gallons of beer from the real world, folks would bring things from the garden, someone would grill a steak, everyone who didn't cook would clean up, and we'd just hang out and have fun. So many evenings I'd go over to Miles place with a guitar, or with his guitar, and we'd pass it around over a few beers, talking about philosophy, Star Wars, or some book or other. It's hard not to write about the strange magic of that space.
My partner and I bonded over similar experiences, mine on a weird little religious commune in California and theirs as a temporary worker at Omega Institute. Both had exploitation, people on weird power trips, frustrating dynamics, but also a strange magic and freedom. Both were sort of fantasy worlds, but places that let us see through this one, let us imagine something that something else is possible behind the veil.
There are many such veils.
Perhaps it's fitting that this is more meandering, as a good wander can help the transition between lots of hard thinking and lots of hard working.
anarchoccultism.org/building-z
Editing feedback (especially typos, spelling, grammar) is always welcome, as are questions and even wider structural advice. I've been adding the handles of folks who provide feedback to the intro in a "thank you" section. If you do help and wouldn't like to be added, please let me know.

@leftsidestory@mstdn.social
2025-12-19 00:30:02

Metropolitana VII - 🆙 🆙 🆙
城 VII - 🆙 🆙 🆙
📷 Pentax MX
🎞️ Ilford Pan 100
#filmphotography #Photography #blackandwhite

Ilford Pan 100 (FF)

English Alt Text:
A large, dark circular object is silhouetted against a partly cloudy sky in this black-and-white photo. Mounted on a pole, the object resembles a street sign or disc. The photo is taken from a low angle, making the circle appear dominant in the frame. The sky transitions from darker to lighter tones, adding depth. The stark contrast between the object and the sky creates a bold, minimalist composition.
中文替代文本:  
这是一张黑白照片,画面中一个大型黑色圆形物体在多云的天空前形成剪影。它安装在一根杆子上,…
Ilford Pan 100 (FF)

English Alt Text:
A tall construction crane stands against a cloudy sky in a black-and-white photograph. The crane’s long boom angles upward, with a hook hanging from its tip. The structural tower supporting the boom is made of metal latticework. The sky is filled with textured clouds, creating a dramatic contrast with the industrial silhouette. The image emphasizes the height and geometry of the crane, evoking a sense of scale and strength.
中文替代文本:  
这是一张黑白照片,画面中是一台高大的建筑起重…
Ilford Pan 100 (FF)

English Alt Text:
A black-and-white photograph shows a streetlight pole and a utility pole with multiple cables stretching across the frame. The streetlight has a curved arm extending leftward with a lamp at the end. The utility pole includes a diagonal support beam. Overhead wires crisscross the cloudy sky, forming geometric patterns. The moody sky and intersecting lines create a visually striking and structured composition.
中文替代文本:  
这是一张黑白照片,画面中有一根街灯杆和一根电线杆,多条电缆横跨画面。街灯杆向…
Ilford Pan 100 (FF)

English Alt Text:
A black-and-white photo captures a modern building with multiple staircases and metal railings viewed from below. Tree branches with leaves frame the top of the image. A reflective sphere is mounted on the building, distorting the surroundings in its mirrored surface. On the building’s wall, a phrase reads: “A PINCH OF SALT CAN BRING OUT THE SWEETNESS.” The composition blends architectural geometry with natural elements and a philosophical message.
中文替代文本:…
@markhburton@mstdn.social
2026-01-16 08:55:57

"There are two possibilities that offer better explanations of the US’s criminal action: oil and power. Petroleum has been widely cited as the key reason, and Trump himself has acknowledged this. There seem to be two plausible aspects to this."
From my new Venezuela article.
I conquer, therefore I am – the United States intervention in Venezuela

@relcfp@mastodon.social
2025-12-25 06:05:24

SYMPOSIUM> Fifty-Year Anniversary of the Nanzan Institute for Religion and Culture
ift.tt/bV6ZBuv
Mining the Logs: Sources on Blue Humor URL …
via Input 4 RELCFP

@mapto@qoto.org
2025-12-19 05:45:33

The consequences of the 996 working hour system:
"On the Chinese internet, the country’s current predicament – slowing economic growth, a falling birthrate, a meagre social safety net, increasing isolation on the world stage – is often expressed through buzzwords. There is tangping, or “lying flat”, a term used to describe the young generation of Chinese who are choosing to chill out rather than hustle in China’s high-pressure economy. There is runxue, or “run philosophy”, which re…