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@jorgecandeias@mastodon.social
2026-07-17 18:03:56

Ah, muito bem, muito bem. O Bridgy Fed agora manda-nos as respostas dos tipos que exigem login para se ver o que escrevem no Bluesy.
Era necessšrio, de facto.

@tiotasram@kolektiva.social
2026-07-12 16:28:07

Since it was relevant to a discussion I just had on here and is something most people probably haven't thought about much (unless you've taken one of a handful of philosophy classes), I thought I'd try to lay out a key piece of Descartes' Meditations (#philosophy

@Techmeme@techhub.social
2026-07-02 05:26:00

Indian IT company Persistent Systems offers to acquire its Germany-based peer Nagarro for $1.45B; Indian IT companies are ramping up M&A as AI reshapes growth (Sayan Chakraborty/Nikkei Asia)
asia.nikkei.com/business/techn

@Mediagazer@mstdn.social
2026-07-06 09:20:31

Sky strikes a £2.1B output deal with ITV Studios, ITV's thriving production arm, until 2032; ITV Studios is not part of the acquisition (Deadline)
deadline.com/2026/07/sky-acqui

@cosmos4u@scicomm.xyz
2026-06-29 17:08:31

Rocket Lab to acquire #Iridium in $8bn deal that reshapes space communications market: aerospaceglobalnews.com/news/r - if completed, the deal would combine Rocket Lab’s launch, satellite manufacturing and space systems capabilities with Iridium’s global low Earth orbit communications network, L-band spectrum and established customer base.

@Techmeme@techhub.social
2026-06-22 15:45:59

Sources: marketing tech startup AppsFlyer raised a $1B Series E at a $2.7B post-money valuation; Moloco, Google, Meta, and Unity acquire minority stakes (Kerry Flynn/Axios)
axios.com/2026/06/22/appsflyer

@Mediagazer@mstdn.social
2026-06-22 15:45:33

Sources: marketing tech startup AppsFlyer raised a $1B Series E at a $2.7B post-money valuation; Moloco, Google, Meta, and Unity acquire minority stakes (Kerry Flynn/Axios)
axios.com/2026/06/22/appsflyer

@kexpmusicbot@mastodonapp.uk
2026-07-18 14:25:14

🇺🇦 #NowPlaying on KEXP's #SoundsOfSurvivance
Electric Wire Hustle:
🎵 Chaser
#ElectricWireHustle
bbemusic.bandcamp.com/track/ch
open.spotify.com/track/1r8zPC8

@arXiv_astrophGA_bot@mastoxiv.page
2026-07-22 08:09:07

Estimating stellar metallicities from Gaia DR3 XP data using LAMOST DR10
Divyansh Srivastava, Andrzej Niedzielski, Rodolfo Smiljanic
arxiv.org/abs/2607.18707 arxiv.org/pdf/2607.18707 arxiv.org/html/2607.18707
arXiv:2607.18707v1 Announce Type: new
Abstract: Gaia DR3 provides astrophysical parameters for hundreds of millions of stars, but the metallicities [M/H] from its GSP-Phot module suffer from systematic biases. We estimate stellar metallicities from Gaia DR3 data using the homogeneous spectroscopic iron abundances [Fe/H] of LAMOST DR10 as training labels. We cross-matched LAMOST DR10 with Gaia DR3 and trained a gradient-boosted decision-tree regressor (XGBoost) on 1.20 million AFGK stars using only Gaia-derived inputs and proxies. We validated the estimates on held-out LAMOST stars, GALAH DR4, APOGEE DR17, and 46 open clusters, and applied the model to measure the radial metallicity gradient of the Milky Way disk. On the held-out test set, the model achieves a mean absolute error of 0.052 dex and $R^2=0.94$ with negligible bias, compared with 0.242 dex for GSP-Phot on the same stars. The estimates transfer well to external surveys, with mean absolute errors of 0.066 dex for GALAH and 0.068 dex for APOGEE. For open clusters, the median difference between our estimated [Fe/H] and spectroscopic values is 0.041 dex, smaller than both GSP-Phot (0.248 dex) and a previous APOGEE-trained XGBoost model (0.067 dex). Applied to the Galactic disk, our model recovers a broken thin-disk radial gradient, with inner and outer slopes of $ 0.119$ and $-0.058\,\mathrm{dex\,kpc^{-1}}$, respectively, and a break near 5.9 kpc, as well as an open-cluster gradient of $-0.066\,\mathrm{dex\,kpc^{-1}}$; both agree with previous high-resolution spectroscopic studies. Our [Fe/H] estimates are accurate to 0.05-0.07 dex for AFGK stars with $[\mathrm{Fe/H}]\gtrsim-2.5$; below this limit, the predictions should be treated as lower bounds. The catalogue and trained model are publicly available on Zenodo and are suitable for chemical studies of the Milky Way.
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