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@cosmos4u@scicomm.xyz
2026-07-13 14:19:09

A Long Period Stellar-mass #BlackHole Binary in ω Centauri: iopscience.iop.org/article/10. -> Hubble discovers first of star cluster’s missing black holes: esahubble.org/news/heic2610/ and science.nasa.gov/missions/webb

@stargazersmith@social.linux.pizza
2026-07-15 03:16:16

The Oldest Stars in the Galaxy Just Weighed In on One of Cosmology's Biggest Arguments - Universe Today universetoday.com/articles/the

@davidaugust@mastodon.online
2026-07-09 09:28:17

A flying robot with an explosive payload can fly through some of the most heavily defended airspace on earth, by itself, for like a thousand miles to turn a petrochemical facility into a raging inferno just by comparing what it sees with its camera to the images in its memory banks.
But no one has found a way to peek into a hospital room to find out if an octogenarian Senator from Kentucky has a pulse.
Can we send in a pulse finding drone perhaps for a heart attack damage asses…

The Nancy Grace Roman space telescope survived two rounds of proposed White House budget cuts,
and began a million-mile journey into deep space from a launchpad at the Kennedy Space Center on Sunday morning.
Searching chiefly for exoplanets and clues about planetary formation,
it is set to join the Hubble and James Webb space telescopes in the annals of Nasa’s storied history of space exploration.
But as next-generation equipment almost 10 years in the making,

@tiotasram@kolektiva.social
2026-08-14 12:50:14
Content warning: Yearning for more social-science fiction

The world needs more science fiction of the social- variety.
Rather than imagining how life could be different because of advances in purely mechanistic technologies, why not imagine how life could be different because of advances in social technologies: new inventions of ways societies can be organized or groups of people can relate to each other.
Some concrete examples of existing social technologies: Amish barn-raising, dolphin surf-fishing, online crowd-funding, Capoeira, potlucks, punk rock concerts, etc.
Each of these things was invented at some point, spread (not inevitably) through social communication, allows groups to achieve a specific purpose (or facilitates several different outcomes) and may or may not require specific tools or mechanistic technologies. There will be new social technologies in the future, and they could radically change how human societies function and what human lives look like, just as mechanistic technologies can.
In the current sociopolitical climate, we see one vision of the future, heavily propagandized, which assures us that advances in mechanistic technology will make life ever easier for humans, leading into a golden age where human needs are met by robots. In this imagination, each individual can actualize the productive capacity to meet their own needs because an individual's productive capacity has been multiplied in every dimension by new mechanistic technologies. Humans can finally be rid of the messy complexity of community-dependence and be totally free because mechanistic technologies will replace the need for community connections to satisfy material desires.
But there's an ugly underside to this vision explored by cyberpunk, where advances in mechanistic technologies bring us to a point of total hierarchical domination and control. In this future, productivity-multipliers are recognized as force-multipliers, and the humans who gain control of them use them to subjugate everyone else.
Some of the best science fiction authors, like Le Guin or Asimov, look at not only mechanistic but also at social technologies, and often at the interaction between the two. Social technologies also have the capacity to radically change the human condition, but they don't lend themselves as well to the power fantasy or libertarian utopia of the self-sufficient individual. Social technologies involve people satisfying their needs through dependence on others, and in turn being obligated to take part in communities.
As an anarchist, I believe that the social technologies needed for human flourishing have not been invented yet. I also believe that with the right social technologies, even without significant advances in mechanistic technologies, it's possible for everyone to be able to meet their own needs through community, in a truly sustainable way.
I wish we had more authors using their craft to help explore the space of social technologies and inspire others to join in that exploration, so that the technologies we need can more quickly be invented and evangelized.
#anarchy #SciFi #technology

@arXiv_astrophGA_bot@mastoxiv.page
2026-09-09 10:57:38

Crosslisted article(s) found for astro-ph.GA. arxiv.org/list/astro-ph.GA/new
[1/3]:
- Exploring the dark sector through galaxy dynamics in clusters
Andrea Biviano, Lorenzo Pizzuti, Antonaldo Diaferio
arxiv.org/abs/2609.05597 mastoxiv.page/@arXiv_astrophCO
- The youngest white dwarf companion to a millisecond pulsar: Insights from NGC 362D
Ettorre, Dalessandro, Cadelano, Ridolfi, Pallanca, Freire, Krishnan, Salaris, D'Antona, Nag
arxiv.org/abs/2609.05608 mastoxiv.page/@arXiv_astrophSR
- Unresolved Binary Systems in the Rubin Era I: An Autoencoder Framework for Binary Identification ...
Tobias G\'eron, Alexander Laroche, Joshua S. Speagle, Maria R. Drout
arxiv.org/abs/2609.05616 mastoxiv.page/@arXiv_astrophSR
- Deep H$\alpha$ Imaging Survey of IC 348 with the Hubble Space Telescope: I. Accretion Properties ...
Jiang, Bowler, Zhou, Kraus, Andrews, Hillenbrand, Ireland, Zhu
arxiv.org/abs/2609.05620 mastoxiv.page/@arXiv_astrophSR
- Rapid radio variability in the $z\sim7$ blazar VLASS J0410$-$0139: Indication of a hidden populat...
Belladitta, Ba\~{n}ados, Gloudemans, Shimwell, Momjian, Intema, Mazzucchelli, Fendt, Vaidya, Walter
arxiv.org/abs/2609.05628 mastoxiv.page/@arXiv_astrophHE
- Calibration of the Next Generation Palomar Spectrograph as a Stellar Speedometer
Pranav Nagarajan, Kareem El-Badry
arxiv.org/abs/2609.05629 mastoxiv.page/@arXiv_astrophSR
- Unresolved triple systems in the aged open cluster Trumpler 19: Discovery, confirmation, and impl...
D. Minniti, et al.
arxiv.org/abs/2609.05722 mastoxiv.page/@arXiv_astrophSR
- A Uniform Census of Variable Stars in M101 Based on HST/ACS Photometry
Jiyu Wang, Xiaodian Chen, Pinjian Chen, Jianxing Zhang, Shu Wang, Licai Deng
arxiv.org/abs/2609.05825 mastoxiv.page/@arXiv_astrophSR
- Self-supervised reconstruction of transients in data from space-borne gravitational-wave detectors
Yuxiang Xu, Minghui Du, Bo Liang, Zihao Xiao, Tianyu Zhao, Peng Xu
arxiv.org/abs/2609.05890 mastoxiv.page/@arXiv_grqc_bot/
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@arXiv_astrophCO_bot@mastoxiv.page
2026-08-05 08:13:11

How Dilatation Invariance Suppresses Loop Corrections to Curvature Perturbations on CMB Scales
Danilo Artigas, Shi Pi, Takahiro Tanaka, Yuko Urakawa
arxiv.org/abs/2608.03725 arxiv.org/pdf/2608.03725 arxiv.org/html/2608.03725
arXiv:2608.03725v1 Announce Type: new
Abstract: Departures from standard slow-roll (SR) inflation have attracted increasing interest in recent years. In particular, scenarios that strongly enhance the power spectrum of the curvature perturbation are often proposed as a mechanism for producing primordial black holes, which could account for part or the totality of dark matter. An ongoing debate in these models is whether non-linear interactions of cosmological perturbations on small scales, namely loop corrections, can become sufficiently large to backreact on CMB scales. In this work, we adopt a non-linear framework, dropping spatial-gradient terms, to study loop corrections at super-Hubble scales. Our focus is to clarify the role of spatial-diffeomorphism invariance, especially dilatation invariance, which is the symmetry under overall rescaling of spatial coordinates, in demonstrating the suppression of loop corrections to the CMB power spectrum. This analysis is valid for any inflaton potential, both with smooth and sharp transitions, and at any loop order, as long as the CMB scales cross the horizon during an SR phase. We compare this result with the different explanations proposed in the literature using various gauge choices, and show our analysis is consistent both in the comoving and in the spatially-flat gauges. In particular, we show that in the spatially-flat gauge, the cubic interaction contains a term that diverges in the sharp transition limit. However, this contribution is exactly cancelled by the quartic interaction.
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@cowboys@darktundra.xyz
2026-08-21 00:23:06

Jerry Jones: “Estoy emocionado” por el rumbo de los Cowboys dallascowboys.com/news/jerry-j

@arXiv_physicsinsdet_bot@mastoxiv.page
2026-08-20 08:42:56

Crosslisted article(s) found for physics.ins-det. arxiv.org/list/physics.ins-det
[1/1]:
- Radiation damage to the Hubble Space Telescope has been several years out of phase with the Solar...
Gavin Leroy, et al.
arxiv.org/abs/2608.18214 mastoxiv.page/@arXiv_astrophIM
- Beam-Tracing-Based Quantitative Reconstruction of Density Fluctuations in QUEST Using Doppler Bac...
Kinoshita, Tokuzawa, Hall-Chen, Tan, Ido, Idei, Ikezoe, Hanada, Hasegawa, Onchi, Peng
arxiv.org/abs/2608.18444 mastoxiv.page/@arXiv_physicspl
- Exact time-correlated coincidence modeling with reset boundaries
Jinjing Li
arxiv.org/abs/2608.18728 mastoxiv.page/@arXiv_hepex_bot
- Technical Proposal for the Atom Interferometer CERN Experiment (AICE) Facility
Gianluigi Arduini, et al.
arxiv.org/abs/2608.18743 mastoxiv.page/@arXiv_hepex_bot
- Exploring the limits of high-energy proton-pion separation in granular calorimeters
Andrea De Vita, Abhishek, Tommaso Dorigo, Pietro Vischia
arxiv.org/abs/2608.19064 mastoxiv.page/@arXiv_hepex_bot
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@arXiv_csPL_bot@mastoxiv.page
2026-07-22 07:37:04

Formal Verification of an Out-of-Order Multiprocessor against an In-Order Weak-Memory ISA
Janggun Lee, Jeehoon Kang
arxiv.org/abs/2607.18727 arxiv.org/pdf/2607.18727 arxiv.org/html/2607.18727
arXiv:2607.18727v1 Announce Type: new
Abstract: Out-of-order multiprocessor is a critical piece of modern hardware, and their verification must solve the following challenges. First, inter-core interleaving, in which the order their reads and writes reach shared memory is unrestricted. Second, intra-core out-of-order execution, in which instructions fire out of program order. The combination of the two yields weak outcomes, which no sequential execution explains, and modern ISA allows such behaviors to account for them. However, the microarchitecture even exhibits excess out-of-order executions, temporarily entering states forbidden by the ISA. While discarded later, such states complicate reasoning about the core in full-system verification. Prior works verify a range of processor designs, while none have performed unbounded verification for out-of-order multiprocessor exhibiting such weak outcomes.
We present the first formal verification of an out-of-order multiprocessor against an in-order, weak-memory ISA. Our key idea is a well-designed core specification, which captures the essence of excess executions in a single list of instructions. Building upon this, we decompose the proof into two steps. The first is a core refinement, proving a core implementation against this specification, abstracting away every microarchitectural state except those necessary to reason about excess executions and the core interface. The second is a system inclusion, serializing the out-of-order memory executions and inter-core interleaving into the ISA, easily removing excess executions thanks to the core specification. All of our proofs are mechanized in Rocq, heavily utilizing large language model (LLM) agents to write proofs automatically.
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