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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…

@arXiv_physicsfludyn_bot@mastoxiv.page
2026-02-26 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
arxiv.org/abs/2602.21940 arxiv.org/pdf/2602.21940 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.
toXiv_bot_toot

@brian_gettler@mas.to
2026-03-24 00:46:35

Following a comment on here about how the Japanese milk bread I made yesterday resembled Newfoundland white bread (which also contains milk), I dug up a recipe. Breakfast is looking promising yet again.
#bread #baking

Two loaves of three-humped white bread cooling on a wire rack.

Trump’s pledge to raise the global baseline tariff rate from 10% to 15% is reverberating across markets, with investors now weighing whether a recent rally in overseas equities can hold.
In a post on TruthSocial, Trump said he would immediately increase the worldwide tariff rate to 15% following a Supreme Court decision related to trade authority. He also signaled that additional, “legally permissible” tariffs could be introduced in the coming months, reinforcing a more aggressive trade…

@ErikUden@mastodon.de
2026-01-23 04:37:09

Israel is the only country in history to regularly occupy UN buildings. The constant defamation against the UNRWA had the nice side effect that such occupations don't lead to any condemnation at all.
The law based order never existed, but whatever legitimacy international laws had in false promises alone is falling apart in front of our very eyes.

@floheinstein@chaos.social
2026-02-23 10:00:53

None of us have to be millennials anymore.
If you were born between LOTR (animated version, 1978) and LOTR The Fellowship (2001), you are the Hobbit Generation: Promised wealth and adventure - but only receiving war and ruin.
(Original source: instagram.com/reel/DUO2zZlCLdG/

A woman in Hobbit's clothing walking through grass and forrests, lying on the grass, leaning against a tree, while the text of the toot appears
@peterhoneyman@a2mi.social
2026-01-22 21:12:46

reading a prelim paper on scaling up gpu-accelerated database query engines and feeling kinda gobsmacked at where that world is at
i remember when we built a “massive” memory machine at princeton with … i think it was 256 MB of RAM. (it sat idle except when ken thompson was logged in and building hash tables for chess endgames which was most of the time)

Following the invasion of 3000 ICE officers,
everyday Minnesotans are pouring into #rapid #response networks and scouring their neighborhoods
—even in 20-degree weather before the sun has come up.
“I’m being tailed by a car I think is ICE,
I can make out two masked individuals through the tinted win…

@arXiv_physicsfludyn_bot@mastoxiv.page
2026-02-26 09:23:30

A minimal wake-vortex model explains formation flight of flapping birds
Olivia Pomerenk, Kenneth S. Breuer
arxiv.org/abs/2602.22043 arxiv.org/pdf/2602.22043 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.
toXiv_bot_toot

Trump promised Iranians the U.S. would rescue them.
They were betrayed.
Reeling from a crackdown on protesters in Iran that left thousands dead,
Iranians are now grappling with feelings of betrayal, confusion and uncertainty
after Donald Trump repeatedly promised to intervene on their behalf
and then declined to do so.

Some Iranians said in interviews that Trump’s words of support had added to their determination to resist the Iranian government
aft…