@Techmeme@techhub.social2025-12-03 22:25:45
Snowflake reports Q3 product revenue up 29% YoY to $1.16B, and forecasts Q4 adjusted operating income margin below estimates; SNOW drops 7% after hours (Brody Ford/Bloomberg)
https://www.bloomberg.com/news/articles/2025-12-0…
@cdarwin@c.im2025-12-03 15:13:56
Palantir shifted course to play key role in ICE deportations
Even as Palantir took on extensive data-management contracts for the federal government,
the company said it was not willing to allow its powerful tools to broadly track immigrants across America.
That commitment no longer holds.
Palantir’s software is helping U.S. Immigration and Customs Enforcement track undocumented immigrants and deport them faster,
according to federal procurement filings and in…
@UP8@mastodon.social2026-01-03 01:30:44
🚒 'A personal embarrassment': Why fire agencies keep failing to put out blazes that later turn disastrous
https://www.latimes.com/california/story/2025-12-01/holdover-fires
🆓
@primonatura@mstdn.social2025-12-30 11:00:43
@Dragofix@veganism.social2025-12-29 15:05:04
Declared extinct in 2025: A look back at some of the species we lost https://news.mongabay.com/short-article/2025/12/declared-extinct-in-2025-a-look-back-at-some-of-the-species-weve-lost/
@arXiv_csDS_bot@mastoxiv.page2026-02-03 07:35:01
End Cover for Initial Value Problem: Complete Validated Algorithms with Complexity Analysis
Bingwei Zhang, Chee Yap
https://arxiv.org/abs/2602.00162 https://arxiv.org/pdf/2602.00162 https://arxiv.org/html/2602.00162
arXiv:2602.00162v1 Announce Type: new
Abstract: We consider the first-order autonomous ordinary differential equation \[ \mathbf{x}' = \mathbf{f}(\mathbf{x}), \] where $\mathbf{f} : \mathbb{R}^n \to \mathbb{R}^n$ is locally Lipschitz. For a box $B_0 \subseteq \mathbb{R}^n$ and $h > 0$, we denote by $\mathrm{IVP}_{\mathbf{f}}(B_0,h)$ the set of solutions $\mathbf{x} : [0,h] \to \mathbb{R}^n$ satisfying \[ \mathbf{x}'(t) = \mathbf{f}(\mathbf{x}(t)), \qquad \mathbf{x}(0) \in B_0 . \]
We present a complete validated algorithm for the following \emph{End Cover Problem}: given $(\mathbf{f}, B_0, \varepsilon, h)$, compute a finite set $\mathcal{C}$ of boxes such that \[ \mathrm{End}_{\mathbf{f}}(B_0,h) \;\subseteq\; \bigcup_{B \in \mathcal{C}} B \;\subseteq\; \mathrm{End}_{\mathbf{f}}(B_0,h) \oplus [-\varepsilon,\varepsilon]^n , \] where \[ \mathrm{End}_{\mathbf{f}}(B_0,h) = \left\{ \mathbf{x}(h) : \mathbf{x} \in \mathrm{IVP}_{\mathbf{f}}(B_0,h) \right\}. \]
Moreover, we provide a complexity analysis of our algorithm and introduce a novel technique for computing the end cover $\mathcal{C}$ based on covering the boundary of $\mathrm{End}_{\mathbf{f}}(B_0,h)$. Finally, we present experimental results demonstrating the practicality of our approach.
toXiv_bot_toot
@aral@mastodon.ar.al2026-01-29 13:31:42
So here’s a little JavaScript initialisation order quiz.
Take the following code:
```js
class A {
constructor (parameters = {}) {
Object.assign(this, parameters)
}
}
class B extends A {
foo
constructor (parameters) {
super(parameters)
this.foo ??= ‘no’
}
}
const b1 = new B()
const b2 = new B({ foo: ‘ok’ })
console.info(`${b1.foo}, ${b2.foo}`)
```
What output would you s…
@Mediagazer@mstdn.social2026-01-22 13:30:56
Filing: Paramount extends the deadline for WBD shareholders to vote on its $30-per-share offer to February 20 (Dade Hayes/Deadline)
https://deadline.com/2026/01/paramount-extends-deadline-warner-bros-discovery-netflix-1236692082/
@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.
toXiv_bot_toot
@Sustainable2050@mastodon.energy2026-01-18 20:50:07
Chilean president declares state of catastrophe as wildfires kill at least 15. Fires blaze through 8,500 hectares, forcing 50,000 people to evacuate as firefighters struggle to extinguish flames in scorching heat: temperatures up to 38°C (100F)
https://www.thegu…