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@toxi@mastodon.thi.ng
2026-08-13 12:22:31

Post-Perseids Sunrise At Raisting Earth Station (2026)
(Pictures from between 5-6AM this morning... I still need to process the meteor shower images from the hour before, but not holding my breath...)
#LandscapePhotography #RadioTelescope

A large radio telescope (with a ~25 meters diameter parabola) seemingly standing in a corn field (it's actually behind). Some faint mountains in the background, clear sky with a pink-blue gradient.
A large radio telescope (with a ~25 meters diameter parabola) seemingly standing in a corn field (it's actually behind). Layers of forest in the background, clear sky with a pink-blue gradient.
A group of radio telescopes of different sizes (from small to very large, ~25 meters diameter) seemingly standing next to a corn field and some trees. Clear sky with a pink-blue gradient. The rising sun is illuminating a part of the largest telescope's dish.
A large radio telescope covered with a ~50m diameter radome, illuminated by the warm morning sun and surrounded by a corn field. Some trees in the background, clear blue sky.
@cowboys@darktundra.xyz
2026-10-12 21:11:31

Cowboys Players Took Matters Into Their Own Hands to Start Week 6 heavy.com/sports/nfl/dallas-co

Cowboys Players Took Matters Into Their Own Hands to Start Week 6
The Dallas Cowboys are hoping to get things back on track, so the players are making sure they are getting the job done themselves in Week 6.

@lightweight@mastodon.nzoss.nz
2026-08-12 21:20:09

I submit that a moving melodic bassline is a most underrated musical device. And this band, the Lucksmiths, are the antidote. Consider thelucksmiths.bandcamp.com/tra (and everything else in their catalogue)...

@arXiv_mathST_bot@mastoxiv.page
2026-08-13 08:00:17

Spectral phase transitions in Gaussian multi-index models
Florent Krzakala, Pierre Mergny, Vanessa Piccolo
arxiv.org/abs/2608.12183 arxiv.org/pdf/2608.12183 arxiv.org/html/2608.12183
arXiv:2608.12183v1 Announce Type: new
Abstract: Recovering a low-dimensional latent subspace from nonlinear observations of Gaussian covariates in high dimensions is a fundamental problem in feature learning. Here, we consider Gaussian multi-index models in which the covariates $\boldsymbol{x}_i \stackrel{\mathrm{i.i.d.}}{\sim} \mathcal{N}(0,\boldsymbol{I}_d)$ and the responses $\boldsymbol{y}_i$ depend on $\boldsymbol{x}_i$ only through its projection onto an unknown $r$-dimensional subspace. Earlier work based on approximate message passing (AMP) identified a sharp threshold for weak recovery [Troiani et al., 2025], raising the question of whether it can be attained, without side information, by a spectral method. We answer this affirmatively and develop a general random matrix theory for matrix-valued spectral estimators of the form \[\boldsymbol{D}_n=\frac{1}{n}\sum_{i=1}^n\boldsymbol{T}(\boldsymbol{y}_i)\otimes\boldsymbol{x}_i\boldsymbol{x}_i^\top,\] where $\boldsymbol{T}$ is an arbitrary bounded symmetric matrix-valued preprocessing map of fixed dimension. As $n,d \to \infty$ with $n/d\to\alpha$, we prove that the empirical spectral measure of $\boldsymbol{D}_n$ converges almost surely to a deterministic compactly supported distribution characterized by a matrix-valued self-consistent equation. We then establish a spectral phase transition for the largest eigenvalue: below threshold it sticks to the bulk edge, while above threshold an outlier emerges. We characterize the outlier location through a finite-dimensional deterministic equation and show that the associated spectral estimator achieves weak recovery of the latent subspace. Finally, we prove that the AMP-derived preprocessing of [Defilippis et al., 2025] is optimal among all bounded matrix-valued preprocessing maps of any fixed dimension. Its transition coincides with the AMP weak-recovery threshold, proving the general spectral conjecture of [Defilippis et al., 2025].
toXiv_bot_toot

@LillyHerself@Mastodon.social
2026-08-13 09:16:52

William Gibson mentioned this Bowie song in his stream today, and how it had risen up in his mind. I was not familiar with it, but now I see the lyrics I understand why it feels topical.
Five Years, by David Bowie:

Pushing through the market square So many mothers sighing (sighing) News had just come over We had five years left to cry in (cry in) News guy wept and told us Earth was really dying (dying) Cried so much his face was wet Then | knew he was not lying (lying) | heard telephones, opera house, favorite melodies | saw boys, toys, electric irons and TV's My brain hurt like a warehouse, it had no room to spare | had to cram so many things to store everything in there And all the …
@dankeck@a11y.social
2026-10-11 13:37:47

#SilentSunday

Metal sign with an icon of a baby stroller reading "Reserved parking for new mothers and mothers to be". The sign hangs on a metal grilled wall or fence that can be partially seen through. Inside the wall it's fairly dark, but outside it's sunny and bright. The view is taken up by construction of a building at least 6 stories tall, next to a city street and a 5 story building. The building being constructed looks to be a car parking garage, everywhere open to the outside rather than walled off.…
@kexpmusicbot@mastodonapp.uk
2026-09-13 11:13:41

🇺🇦 #NowPlaying on KEXP's #VarietyMix
Mad Iris:
🎵 Employee of the Month
#MadIris
madiris.bandcamp.com/track/emp
open.spotify.com/track/70fGIBL

@hikingdude@mastodon.social
2026-08-09 11:42:19

I couldn't decide what to do today and where to go. I got up too late for a longer hike due to the heat. In the end I just got on my bike and followed the road and pushed myself for some training effect.
It was a really enjoyable ride except for the last 10km where the heat got really annoying.
Is this a #silentsunday contribution? I think so... No talking, less thinking, j…

summary of a cycling activity, showcasing the following key details: - **Distance:** 67.50 kilometers - **Total Time:** 3 hours, 9 minutes, and 56 seconds - **Average Speed:** 21.3 km/h - **Total Ascent:** 574 meters - **Average Heart Rate:** 155 bpm
This image captures a breathtaking and serene mountain landscape, evoking a sense of tranquility, natural beauty, and adventure. The scene is dominated by a lush, green valley framed by dense forests of evergreen trees. The trees, with their vibrant green foliage, create a rich and textured tapestry that stretches up the slopes of the surrounding mountains. A **rocky riverbed** cuts through the center of the image, its surface a mix of smooth stones and patches of water, adding a sense of move…
@leftsidestory@mstdn.social
2026-08-10 00:30:04

City Clouds IV ⛅️
城市云朵 IV ⛅️
📷 Yashica 635
🎞️ LUCKY SHD 100 (6x6)
If you like my work, Support by buying me a coffee or a roll of film from
PayPal paypal.com/paypalme/ydcdingsite
Wise

Lucky LUCKY SHD 100 (6x6) English A black-and-white photograph capturing a tall, lattice-structured electrical transmission tower stretching upward into a cloudy sky. Multiple power lines extend from the tower, creating a web-like pattern against the sky. To the left, a cluster of trees with dense foliage is visible. The image emphasizes the height and industrial design of the tower. 中文 一张黑白照片，捕捉到一座高耸的、格子结构的输电铁塔向云层延伸。多条输电线从铁塔延伸出去，在天空中形成网状图案。左侧是一片茂密的树木。照片突出了铁塔的高度和工业设计感。
Lucky LUCKY SHD 100 (6x6) English A black-and-white photograph of a residential area featuring multiple high-rise apartment buildings. The buildings have a modern architectural style with numerous windows and balconies. A lower structure, possibly a parking garage or commercial space, is visible in the foreground. Trees and a cloudy sky fill the background, adding depth to the scene. 中文 一张黑白照片，展示了一个住宅区，其中有多栋高层公寓楼。这些建筑具有现代化的建筑风格，有众多窗户和阳台。前景中有一个较低的建筑，可能是停车场或商业空间。背景中有树木和多云的天空，为场景增添了深度。
Lucky LUCKY SHD 100 (6x6) English A black-and-white photograph of an urban street scene. On the left, a staircase with a railing ascends, with people walking up. On the right, a motorcyclist is stationary on the sidewalk. The street is lined with parked motorcycles and cars, and a tall building with a grid-like window pattern stands prominently in the background. Trees and streetlights are also visible, contributing to the bustling city atmosphere. 中文 一张黑白照片，展示了城市街道的景象。左侧有一个带扶手的楼梯，人们正在向上行走。右侧，…
@cdarwin@c.im
2026-08-10 23:15:51

Daphy Michel,
who suffered from severe mental illness,
was found more than 20 miles away from her home in Charleroi,
wearing summer clothes in freezing weather.
In June, Michel’s death was ruled a homicide.
An attorney for the family said they are planning to file a lawsuit.
Michel’s death isn’t recorded on ICE’s website. “ICE had NOTHING to do with this woman’s death,” DHS declared on social media.
ICE reporting also doesn’t account for people who die…

The Deaths ICE Doesn’t Count
Prisciliano Trejo Ricano passed away in the hospital days after being released from detention.