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@marcel@waldvogel.family
2026-07-20 10:19:48

"Seit seinem Amtsantritt vor dreieinhalb Jahren regiert Rösti bevorzugt per Verordnung – an Parlament und Stimm­volk vorbei.
Ob beim präventiven Wolfsabschuss, bei der Einschränkung von Tempo 30 oder der Senkung der SRG-Gebühren auf 300 Franken: Rösti nutzt die Spielräume der Exekutivmacht konsequent aus. Mit dem Bundesamt für Justiz liegt er deshalb seit langem im Dauer­clinch."
Ähnlichkeiten zu amtierenden Präsidenten sind rein zufällig.

@ErikJonker@mastodon.social
2026-07-19 08:29:03

The fact that an autocratic, corrupt and in some ways fascist republican administration only leads to a relatively small lead of the democrats in the polls, is food for thought. People in the US are farther removed from European and democratic values than ever it seems.

@arXiv_astrophGA_bot@mastoxiv.page
2026-07-22 08:11:34

Molecular gas hidden in plain sight in the early Universe
Pasquier Noterdaeme, Jens-Kristian Krogager, Sergei Balashev
arxiv.org/abs/2607.18974 arxiv.org/pdf/2607.18974 arxiv.org/html/2607.18974
arXiv:2607.18974v1 Announce Type: new
Abstract: We report the discovery of an extreme intervening molecular absorber at zabs = 4.1 towards the z = 4.7 quasar SDSS J080023.02 305101.22 revealed through strong H2 absorption that had remained unnoticed in archival data for about two decades. The system, which we analysed with new VLT/X-shooter observations, has a metallicity of about one-fifth the solar value, in line with the moderate dust reddening AV~0.06 mag. More strikingly, it exhibits the highest molecular fraction, fH2 = 2N(H2)/(2N(H2) N(HI))~=60%, measured at z>0 from direct determinations of both atomic and molecular hydrogen column densities. Notably, this fraction is comparable to the very highest values in the Local Group. The inferred fH2 still represents a conservative lower limit to the local molecular fraction since the H i absorption very likely includes atomic gas unrelated to the actual molecular component, as indicated by the wide (Delta v~500 km/s) multi-component low-ionisation metal profile.
The detection of such a system at early cosmic times is remarkable given the limited number of quasar spectra probing z>4. It suggests an unexpectedly high incidence of H2, with important implications for the evolution of molecular gas. This high incidence may be driven by high average densities and enhanced turbulence at those redshifts. At the same time, our results also highlight possible observational biases, both in quasar selection and in recognising strong H2 absorption, suggesting that a significant fraction of molecular gas may remain undetected, in particular near the peak of star formation. The present system offers a unique benchmark for developing efficient detection algorithms. Further progress will benefit from colour-independent quasar surveys, while constraining the physical conditions and environments of such extreme absorbers will require observations on future extremely large telescopes.
toXiv_bot_toot

@arXiv_physicsmedph_bot@mastoxiv.page
2026-07-23 07:41:44

Koopman-Operator Spectral Decomposition for Nonlinear Motion Suppression in Dynamic Contrast-Enhanced MRI of the Head and Neck
Renjie He
arxiv.org/abs/2607.19401 arxiv.org/pdf/2607.19401 arxiv.org/html/2607.19401
arXiv:2607.19401v1 Announce Type: new
Abstract: We build a motion suppression pipeline based on Koopman operator theory, which provides a way to turn nonlinear dynamics into linear ones by looking at the data through the right set of mathematical "lenses" (called observables). We test three versions of this idea: plain DMD that works directly on pixel values, an extended version (EDMD) that adds physically motivated features like squared intensities and spatial gradients to better capture how the MRI signal and tissue motion interact, and a neural network version that tries to learn the best features automatically. A key practical contribution is time-course repetition: we tile the entire temporal series multiple times before decomposition, which does not change the underlying dynamics but gives the algorithm more data to work with, fixing a dimensionality bottleneck that otherwise prevents the extra features from helping. The full pipeline works slice by slice, dividing each image into small overlapping blocks, applying the Koopman lifting and DMD to separate slow contrast enhancement from fast motion based on their characteristic frequencies, and blending the corrected blocks back together.
toXiv_bot_toot

@krone@frawas.de
2026-05-11 18:33:14

„Doreen“ hat‘s in sich - Unwetter über Wien: Song-Contest-Village geräumt #News #Nachrichten

@Techmeme@techhub.social
2026-05-03 05:01:47

Palo Alto Networks agrees to acquire Portkey, which develops AI gateway tech to manage and secure AI agents; sources say the deal values Portkey at $120M-$140M (The Economic Times)
economictimes.indiati…

@waidler@bayerwald.social
2026-06-01 05:26:17

Ethnopluralismus ist eine ideologische Konstruktion der Neuen Rechten, die offen rassistische Positionen durch kulturalistische Sprache ersetzt.
Kernthese: Jedes Volk besitzt eine unveränderliche kulturelle (und implizit ethnische) Identität, die es zu bewahren gilt. Kulturen seien gleichwertig — aber nur solange sie getrennt bleiben. Vermischung bedeute Verlust und sei für alle Beteiligten schlecht.
Gipfeltreffen in Portugal mit Sellner.