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@macandi@social.heise.de
2026-07-20 10:48:03

iPad mini bald mit OLED – aber wohl ohne ProMotion
Apple steht kurz vor der Überholung seines Kompakt-Tablets – und bereitet auch neue Modelle weiterer Baureihen vor. Doch gibt es technische Defizite?

Kushner predicts Hamas disarmament progress in about 30 days

Trump approval falls to 33%, lowest of his presidency, Reuters/Ipsos poll finds

Texas parents ask US supreme court to hear Ten Commandments in classrooms case

House ethics committee investigating Jimmy Gomez over sexual misconduct allegations

Trump says Kim Jong-un has responded to his overtures but doesn't offer details

Trump blames 'vandals' for damaged grass in the spot where he held his…

@trochee@dair-community.social
2026-07-18 06:00:32

Numismatist alert!
I just found this very old penny in my pocket because it *stuck to my headphone case's magnetic clasp*
Wait, you say. Isn't ol' Abe supposed to be copper (or copper and zinc)?
Apparently not in 1943!

A very old penny, nearly black, held between two fingers

Close inspection shows the year 1943.

It is older than my dad. 

And apparently, ferromagnetic!
The back side of that penny which does not have the Lincoln Memorial, but instead has the wheat stalks and the words

ONE
CENT
United States
Of America

And the words "e pluribus unum" in small print across the top rim
@mcdanlj@social.makerforums.info
2026-08-13 00:55:57

Big news! I just released version 0.9 of my 3d-printed #MorseCode single-paddle key system.
Changes:

  • New grip that acts like a case. @…
Photo of the underside of a magnet mount holding a Morse key, next to a jeweler's block
Photo of blue key in red grip/case, deployed in grip mode where the paddle sticks out.
Photo of blue key in red grip/case, deployed in case mode. The key is fully retraced into the case, and the cable is wrapped around the whole unit.
Screenshot of FreeCAD model of key and grip/case. The grip/case is transparent to show its internal structure, with stops for the side contact thumb screws such that with the key installed as shown, the paddle protrudes; if installed from the other side, the paddle is protected inside.

Helical crush ribs are partially visible in several holes.

The path for the wires from the inside to the outside are racetrack slots instead of round holes, so that the terminal tabs do not have to be soldered …
@peterhoneyman@a2mi.social
2026-07-02 17:55:42

headed to the post office to mail a couple mix tapes to ypsilanti and rockingham (va)

Hand-painted J-cards and tape labels.

Tape 1 (purple with green polka dots)

A solid violet-purple background covered edge to edge with dozens of hand-painted green dots, scattered in loose clusters rather than a strict grid — playful, almost confetti-like. Simple two-color palette, high contrast.

ALT by Claude
Hand-painted J-cards and tape labels.

Tape 1 (magenta/red top, red with painted loops on bottom)

The top panel (the label area over the cassette windows) has a pink-to-magenta gradient sitting above a red band flecked with small blue dots, like leopard-print texture. Below the cassette hubs, the second panel is a solid red field with loose, looping line-drawings in blue, purple, and maroon — they read like abstract scribbled circles/knots rather than representational shapes.

ALT by Claude
Hand-painted J-cards and tape labels.

Tape 2 (dark abstract/textured — reddish brown)

This one has a more painterly, textured look: a mottled rust/copper background (looks like it could be a marbled or sponge-textured paint job) with a large dark navy/black organic blob in the upper left, a bold red circular "eye" or button shape right of center, and a thin lavender line running along the bottom edge. Moodier and more atmospheric than the other tapes.

ALT by Claude
Hand-painted J-cards and tape labels.

Tape 2 (green/red with wormlike shapes)

Top panel: green field over a red stripe, straightforward color-blocking. Bottom panel: bright green background with two long, wavy worm/snake shapes — one red-and-pink striped, one green-and-lavender striped — winding across the panel, surrounded by small dark magenta polka dots.

ALT by Claude
@arXiv_astrophGA_bot@mastoxiv.page
2026-09-09 09:21:56

Detection prospects for heavy WIMP dark matter around M31* in microwave band
Andrei E. Egorov
arxiv.org/abs/2609.08771 arxiv.org/pdf/2609.08771 arxiv.org/html/2609.08771
arXiv:2609.08771v1 Announce Type: new
Abstract: This work analyzes the detection prospects for weakly interacting massive particles (WIMPs) in dark matter (DM) density spike around the supermassive black hole (SMBH) in Andromeda galaxy M31 in microwave band. WIMP annihilation produces relativistic electrons and positrons, which generate the synchrotron emission in strong magnetic field of the accretion flow medium at microwave frequencies. Properties of this emission, as well as their dependence on DM and medium parameters, were modeled. Atacama Large Millimeter Array (ALMA) sensitivity to this emission and underlying WIMP parameters was estimated. It was obtained that M31* in microwave band represents the unique target, where DM spike signal can be detected in case of realistic spike and halo density profiles. In such case ALMA may reach the thermal s-wave annihilating WIMPs with masses up to around 1 TeV with just 10--100 hours exposure. Optimistic parameter configurations may allow probing all possible WIMP masses up to 100 TeV. Related systematic uncertainties are discussed.
toXiv_bot_toot

@arXiv_astrophCO_bot@mastoxiv.page
2026-08-05 08:18:08

Cosmology in the Einstein Telescope era: comparing traditional and simulation-based methods for population inference
Giovanni Antinozzi, Guillermo Franco Abell\'an, Davide Sciotti, Matteo Martinelli
arxiv.org/abs/2608.04005 arxiv.org/pdf/2608.04005 arxiv.org/html/2608.04005
arXiv:2608.04005v1 Announce Type: new
Abstract: The next generation of gravitational wave detectors, such as the Einstein Telescope (ET), will observe orders of magnitude more binary black hole mergers than current facilities. Most of these events will lack an electromagnetic counterpart, also known as dark siren events, yet will still enable percent-level cosmological constraints. However, the likelihood traditionally used in Hierarchical Bayesian Inference (HBI) for population-level analyses becomes computationally prohibitive as the size of dark siren catalogues and population parameters grow. In this work we compare HBI against simulation-based inference (SBI) as a scalable alternative for cosmological population inference in the ET era. Studying a proof-of-concept example of a mock ET inference, we build a catalogue of $O(10^4)$ binary black hole events, then perform inference on the Hubble constant $H_0$ and matter density $\Omega_m$ in a flat $\Lambda$CDM cosmology, using both a hierarchical analytical likelihood and Marginal Neural Ratio Estimation (MNRE). We find excellent agreement between the two approaches, with SBI reproducing the HBI posteriors to high accuracy, while requiring orders of magnitude less computation once the simulation and training cost is amortized. We further demonstrate that SBI extends straightforwardly to a joint cosmology-plus-astrophysics analysis, simultaneously constraining $(H_0,\Omega_m)$ together with the parameters of the star formation rate density, at negligible additional cost compared to the significant increase in complexity such an extension would require within the HBI framework. Our results indicate that SBI is a promising and scalable tool for population inference with third-generation GW detectors.
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@peterhoneyman@a2mi.social
2026-07-07 03:45:16

these tapes are ready to go (to ann arbor, ann arbor, chicagoland, and denton texas) as soon as i print the mailing labels
this makes 250 tapes mailed out (so far!)

Four cassette cases in a 2x2 grid, painted on their inlay cards, against a plain wall, reflected in a dark glossy surface below.

Top left: Peach-orange background scattered with small painted marks in navy, black, silver, red, and green — teardrops, triangles, dashes, blobs — a lively confetti-like pattern with no single focal point.

Top right: Warm brown background with sky-blue teardrops around the border. A thick magenta line stretches across the top, ending in a rounded blob. A green X si…
@arXiv_mathDS_bot@mastoxiv.page
2026-08-05 07:53:08

Fixed Points, Stability, and Basin Geometry of the $3\times 3$ Correlation Map
Ishrak Alhajj Hassan
arxiv.org/abs/2608.03404 arxiv.org/pdf/2608.03404 arxiv.org/html/2608.03404
arXiv:2608.03404v1 Announce Type: new
Abstract: For more than half a century, iterated Pearson correlation has been used in clustering, seriation, and information visualization despite the absence of a general analytical theory of its limiting dynamics. We completely resolve the fixed-point classification and relative Lyapunov stability problems for the correlation map in dimension three. An exact row-wise Gram factorization yields the identity $\operatorname{rank}C(A)=\operatorname{rank}(AH_n)$, forcing every fixed point to be singular and to lie on the relative boundary of the elliptope. In arbitrary dimension, we characterize all nondegenerate sign-valued fixed points and prove that their number is $2^{n-1}-1$.
For $n=3$, we derive an explicit coordinate representation and prove that the natural nondegenerate domain contains exactly seven fixed points: three rank-one patterned points, three rank-two mixed points, and one rank-two equicorrelation point, forming three orbits under the permutation action of $S_3$. Exact symbolic Jacobian calculations prove that the patterned points are locally asymptotically stable, whereas admissible invariant boundary curves realize the expanding multipliers and prove that the mixed and equicorrelation points are Lyapunov unstable relative to the natural nondegenerate domain.
Permutation equivariance maps the three patterned basins onto one another and implies equal Lebesgue measure whenever measurable. Reproducible basin computations classify every sampled admissible trajectory as converging to one of the three patterned attractors, with nearly equal frequencies and no trajectory-level classification mismatches under stricter validation. These results establish a complete fixed-point and relative Lyapunov stability theory in dimension three and provide strong reproducible evidence for the full-measure convergence conjecture for the union of the three patterned basins.
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Government information librarian Charlie Amiot makes a strong case for the misinterpretation of the cause of hallucinations in the legal work product.
Amiot argues that If you happen to be someone who has a set of encyclopedias sitting next to them,
you’re undoubtedly sitting next to hundreds of hallucinations,
inserted both at the time of print and facts that have mutated with the passage of time since being printed.
Any newspaper or magazine you pick up contains a…