Tootfinder

SpaceX S-1: xAI had a $6.4B operating loss on $3.2B in revenue in 2025; Grok and X had 550M MAUs combined as of March 2026, and 117M used Grok's AI features (Rebecca Bellan/TechCrunch)
https://techcrunch.com/2026/05/20/xai-

xAI burned $6.4B last year. SpaceX’s IPO filing shows why the spending is far from over | TechCrunch
SpaceX's IPO filing reveals xAI lost $6.4 billion in 2025 while planning a massive Grok expansion — offering the first public look at Elon Musk's AI financials and more details about his ambitions.

Primer to get you started with Optimization and Mathematical Programming in R #rstats

CRAN Task View: Optimization and Mathematical Programming
This CRAN Task View contains a list of packages that offer facilities for solving optimization problems. Although every regression model in statistics solves an optimization problem, they are not part of this view. If you are looking for regression methods, the following views will also contain useful starting points: MachineLearning, Econometrics, Robust Packages are categorized according to the following sections. See also the “Related Links” and “Other Resources” sections at the end.

Analysis: OpenAI and Anthropic employees are donating to campaigns more heavily and cohesively than Google, Meta, and Airbnb employees did post-IPO (Alexandra Lindsay/The San Francisco Standard)
https://sfstandard.com/2026/07/18/ai-s-…

AI’s new political donor class is already outspending Big Tech’s last one
Campaign filings show AI employees donating faster, more heavily, and more in sync than three prior tech-IPO donor classes. Here’s where the money is going.

Replaced article(s) found for physics.flu-dyn. https://arxiv.org/list/physics.flu-dyn/new
[1/1]:
- On the stability of an in-line formation of hydrodynamically interacting flapping plates
Monika Nitsche, Anand U. Oza, Michael Siegel
https://arxiv.org/abs/2410.04626 https://mastoxiv.page/@arXiv_physicsfludyn_bot/113270998236203403
- Side-wall wetting and linear stability of falling films
Hammam Mohamed, J\"orn Sesterhenn
https://arxiv.org/abs/2504.13300 https://mastoxiv.page/@arXiv_physicsfludyn_bot/114374794050144417
- An Omni-Temporal Theory for Hydrodynamic Dispersion and Reaction in Porous Media
Md Abdul Hamid, Kyle C. Smith
https://arxiv.org/abs/2505.06063 https://mastoxiv.page/@arXiv_physicsfludyn_bot/114493702701690116
- Confirming Wave Turbulence Predictions in Rotating Turbulence
Omri Shaltiel, Omri Gat, Eran Sharon
https://arxiv.org/abs/2510.25446 https://mastoxiv.page/@arXiv_physicsfludyn_bot/115462467154250733
- Using Physics Informed Neural Network (PINN) and Neural Network (NN) to Improve a $k-\omega$ Turb...
Lars Davidson
https://arxiv.org/abs/2511.12493 https://mastoxiv.page/@arXiv_physicsfludyn_bot/115570134553603649
- Oscillating Detonation of Liquid Ammonia
Wenhao Wang, Zongmin Hu, Peng Zhang
https://arxiv.org/abs/2511.14167 https://mastoxiv.page/@arXiv_physicsfludyn_bot/115575358542454196
- On the Poisson-Source Basis of Logarithmic Wall-Pressure-Variance Growth
Jonathan M. O. Massey, Joseph C. Klewicki, Beverley J. McKeon
https://arxiv.org/abs/2511.16776 https://mastoxiv.page/@arXiv_physicsfludyn_bot/115603689363840109
- Convolutional causal learning for aerodynamic flows
Ryo Koshikawa, Ryo Araki, Qiong Liu, Kai Fukami
https://arxiv.org/abs/2601.19104 https://mastoxiv.page/@arXiv_physicsfludyn_bot/115971839485449464
- Assessing engineering wake models against operational data: insights from the Lillgrund wind farm...
Siguenza-Alvarado, Harrison, Mohammadi, Vishwakarma, Bossanyi, Landberg, Bastankhah
https://arxiv.org/abs/2601.21035 https://mastoxiv.page/@arXiv_physicsfludyn_bot/115983015393462612
- Neural equilibria for long-term prediction of nonlinear conservation laws
Benitez, Hegazy, Guo, Dokmani\'c, Mahoney, de Hoop
https://arxiv.org/abs/2501.06933 https://mastoxiv.page/@arXiv_csLG_bot/113825452743912532
- Self-similar rupture of thin films of power-law fluid
Michael C Dallaston, Steven A Kedda, Scott W McCue
https://arxiv.org/abs/2509.05383 https://mastoxiv.page/@arXiv_condmatsoft_bot/115173629129170202
- Instability and self-propulsion of flexible autophoretic filaments
Ursy Makanga, Akhil Varma, Panayiota Katsamba
https://arxiv.org/abs/2509.10153 https://mastoxiv.page/@arXiv_condmatsoft_bot/115207443699020835
- Analytical response functions for a compressible thin fluid layer with odd viscosity
Abdallah Daddi-Moussa-Ider, Yuto Hosaka, Shigeyuki Komura
https://arxiv.org/abs/2602.18136 https://mastoxiv.page/@arXiv_condmatsoft_bot/116119064615788127
toXiv_bot_toot

For those following along at home: the wee one will continue to be in our care for at least the next couple of weeks.
#Grandparenting

404 Sleep not found.
But at least the air is still cool
#oncallduty #pikett

hells yeah #NYCPol

Einen wunderschönen guten Morgen aus der Nähe von #Hodenhagen
Heute Nacht hat es gewittert, aber nur leicht geregnet. Das war eine richtig schöne Übernachtung.
Ich befinde mich jetzt gerade im #AllerLeineTal und heute geht es durch Bad

Q&A with Steven Soderbergh about using AI to visualize 10% of his John Lennon documentary after running out of "time and money", facing a backlash, and more (Jake Coyle/Associated Press)
https://apnews.com/article/john-lennon

Steven Soderbergh on John Lennon and AI
The day John Lennon was shot in 1980, he and Yoko Ono gave an interview to a San Francisco radio crew from their home in New York’s Dakota Apartments. In “John Lennon: The Last Interview,” Steven Soderbergh pp those surviving tapes into a new documentary that debuted Saturday at the Cannes Film Festival. But his decision to fill in some visuals using Meta's AI software has prompted an outcry. One of America’s leading filmmakers was using AI? In a film about a Beatle, no less? Soderbergh…

Filing: the US DOJ asks court to dismiss an NAACP suit over xAI's gas turbines, saying xAI is integral to US' military operations, including the Iran War (Molly Taft/Wired)
https://www.wired.com/story/doj-lawyers-argue-xai-vital-national-secur…

DOJ Lawyers Argue xAI Is ‘Vital’ for National Security in NAACP Lawsuit
In a bid to dismiss a lawsuit over xAI's polluting gas turbines, the Justice Department claimed the company is integral to military operations—including the Iran War.