@Techmeme@techhub.social2026-03-26 11:45:57
The European Commission launches a DSA investigation into Snapchat for failing to protect children, including assessing its age verification measures (Eliza Gkritsi/Politico)
https://www.politico.eu/article/eu-probes-snapchat-for-fa…
@alejandrobdn@social.linux.pizza2026-01-24 21:44:32
Chromebooks train schoolkids to be loyal customers, internal Google document suggests https://www.theverge.com/news/867138/google-chromebook-education-expansion-court-filings
@Mediagazer@mstdn.social2026-03-24 23:55:45
In a legal filing, NYT accuses the DOD of defying a court ruling that declared parts of its press rules unconstitutional, after the DOD issued new rules Monday (Erik Wemple/New York Times)
https://www.nytimes.com/2026/03/24/business/media/new-york-t…
@cheryanne@aus.social2026-01-24 11:16:41
Blues with a Feeling - The Official Podcast
With a dedicated following both locally and internationally as a radio show of 27 years, Shaun Bindley is now working on producing Blues with a Feeling as a Podcast...
Great Australian Pods Podcast Directory: https://www.greataustralianpods.com/blues-
@cdarwin@c.im2026-01-25 15:37:25
Unlike his predecessors,
Trump does not even pretend that his imperialism serves any purpose nobler than American domination
For Trump, “America first” didn’t imply any legal or moral opposition to foreign invasions.
To the contrary, he criticized Bush for not seizing Iraq’s oil.
He denounced regime change and nation building because they allegedly expended American blood and treasure on behalf of non-Americans.
Instead, Trump promised short wars in which onl…
@jswright61@ruby.social2026-01-25 20:17:07
Just got an email from one of my Senators, Jon Ossoff, GA with some welcomed news:
Good afternoon,
On Sunday, U.S. Senator Jon Ossoff demanded civil liberties protections before further funds are appropriated to ICE and announced he will oppose the measure scheduled for a vote this week.
(Full text of letter in the image alt-text)
#UsPol
@arXiv_physicsfludyn_bot@mastoxiv.page2026-02-26 09:01:51
Large eddy simulation of turbulent swirl-stabilized flames using the front propagation formulation: impact of the resolved flame thickness
Ruochen Guo, Yunde Su, Yuewen Jiang
https://arxiv.org/abs/2602.21940 https://arxiv.org/pdf/2602.21940 https://arxiv.org/html/2602.21940
arXiv:2602.21940v1 Announce Type: new
Abstract: This work extends the front propagation formulation (FPF) combustion model to large eddy simulation (LES) of swirl-stabilized turbulent premixed flames and investigates the effects of resolved flame thickness on the predicted flame dynamics. The FPF method is designed to mitigate the spurious propagation of under-resolved flames while preserving the reaction characteristics of filtered flame fronts. In this study, the model is extended to account for non-adiabatic effects and is coupled with an improved sub-filter flame speed estimation that resolves the inconsistency arising from heat-release effects on local sub-filter turbulence. The performance of the extended FPF method is validated by LES of the TECFLAM swirl-stabilized burner, where the results agree well with experimental measurements. The simulations reveal that the stretching of vortical structures in the outer shear layer leads to the formation of trapped flame pockets, which are identified as the physical mechanism responsible for the secondary temperature peaks observed in the experiment. The prediction of this phenomenon is shown to be strongly dependent on the resolved flame thickness, when the filter size is used for modeling sub-filter flame wrinklings. Without proper modeling of the chemical steepening effects, the thickness of the resolved flame brush is over-predicted, causing the flame consumption rate to be under-estimated. Consequently, the flame brush detaches from the outer shear layer, resulting in a failure to capture the flame pockets and the associated secondary temperature peaks.
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@roelgrif@mstdn.social2026-01-24 11:03:33
Elke dag denk je: het kan onmogelijk *nog* schaamtelozer, dat Trump-regime.
En ja, dan toch. En dan denken dat je er mee weg komt terwijl je eigen ministerie van justitie de originele foto al gepubliceerd heeft.
@Techmeme@techhub.social2026-03-26 11:35:45
The EU accuses Pornhub, Stripchat, XNXX, and XVideos of failing to protect kids from exposure to pornographic content, in preliminary DSA investigation findings (Barbara Moens/Financial Times)
https://www.ft.com/content/f1250594-80e3-46cd-9969-676ce7bd1aa8
@arXiv_physicsfludyn_bot@mastoxiv.page2026-02-26 09:23:30
A minimal wake-vortex model explains formation flight of flapping birds
Olivia Pomerenk, Kenneth S. Breuer
https://arxiv.org/abs/2602.22043 https://arxiv.org/pdf/2602.22043 https://arxiv.org/html/2602.22043
arXiv:2602.22043v1 Announce Type: new
Abstract: Collective patterns of motion emerge across biological taxa: insects swarm, fish school, and birds flock. In particular, large migratory birds form strikingly ordered V-shaped formations, which experiments and direct numerical simulations have demonstrated provide substantial energetic benefits during long-distance flight. However, the precise aerodynamic and morphological mechanisms underlying these benefits remain unclear. In this work, we develop a reduced-order model of the wake-vortex interactions between two flapping birds flying in tandem. The model retains essential unsteady flapping dynamics while remaining computationally tractable. By optimizing over a six-dimensional state space, which comprises the follower's three-dimensional relative position and three independent flapping parameters, we identify the energetically optimal leader-follower configuration of northern bald ibises. The predicted optimum agrees quantitatively with live-bird measurements. Because of its simplicity, the model allows for direct interrogation of the physical mechanisms responsible for this optimum. In particular, it isolates precisely how the follower's wing kinematics interact with the leader's wake to enhance aerodynamic efficiency. The model predicts an 11% reduction in total mechanical power for a follower in formation flight -- consistent with experimental estimates -- and shows that this saving arises from reductions in both induced and profile power, dominated by decreased profile power enabled primarily through reduced flapping amplitude and, secondarily, reduced upstroke flexion. These results provide a mechanistic explanation for the structure of V-formations and offer new insight into the aerodynamic principles governing collective flight.
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