Tootfinder

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.
toXiv_bot_toot

‘Get that electric feeling’: new 🇬🇧 campaign to show savings and benefits of electric driving
https://cleanenergy.campaign.gov.uk/electric-vehicle/ (more background:

DOJ seeks to undo Bannon’s conviction for defying Jan. 6 subpoena
-- its latest shift in a legal position to benefit a close ally of President Donald Trump.

In a Monday legal filing, the department asked the Supreme Court to send Bannon’s case back to the district court,
where the U.S. attorney filed a separate motion seeking to dismiss the charges against Bannon.

DOJ seeks to undo Bannon’s conviction for defying Jan. 6 subpoena
Jeanine Pirro, the U.S. attorney for D.C., said a judge should dismiss Stephen K. Bannon indictment over defying a Jan. 6 subpoena “in the interests of justice.”

Rebuilding public trust in AI requires meaningful citizen engagement, transparent governance, and robust legislation. Technology itself is not the problem. The issue is that few people trust institutions to deploy it wisely and for their benefit. This makes the first step to answer the following question: What’s it in for me?

Breaking the doom loop: How to rebuild trust in AI
Rebuilding public trust in AI requires meaningful citizen engagement, transparent governance, and robust legislation. By involving communities and prioritising effective oversight, institutions can break the ...

🧼 Natural peptides from cyanobacteria offer eco-friendly solution to marine biofouling
https://phys.org/news/2026-01-natural-peptides-cyanobacteria-eco-friendly.html

Natural peptides from cyanobacteria offer eco-friendly solution to marine biofouling
A new CIIMAR study demonstrates that natural peptides produced by cyanobacteria are capable of replacing toxic biocides that dominate the market for anti-fouling paints used in the maritime industry. The use of these peptides as an active component brings direct benefits to the environment, the blue economy and marine biodiversity.

I see no sign of any recognition from those who would want such a ban that they see any of the collateral damage a successful ban would have on the majority of kids who are not falling for this bullshit. That they are banning any good at all along with the bad.
Under 18s only
I see that the lobbying for these laws are funded by the absolute worst companies on the internet, those who will be entrenched by the legal compliance costs, that will cement themselves as the arbitrators of who is allowed to access the internet.
It’s a gift to Palantir and other surveillance companies. The very people running these algo-feeds are the ones who benefit from IDing every user and stalking them across the internet on their government-approved internet-licence IDs.
I don’t think even a successful ban on social media for kids would actually address the issue of kids being exposed to sexism and misogony or reduce the kids alienation and depression.
A ban can’t help, will make many things worse, won’t address the problem, and will make competing with the worst surveillance capitalists on the planet more difficult.
Going to war with every internet site and advice forum and making internet access harder won’t fix anything, and will have massive collateral damage against everyone seeking support from strangers or trying to learn things their parents won’t teach them.
But I see we are going to do it anyway.
The direction is clear.
Those companies do get what they lobby for, and they are lobbying hard for ID checks on every website, wrapping their desire to enclose the internet commons for themselves in a faux concern for children’s welfare.
And governments wish to monitor and control the internet, so they will pass these laws.
I wonder how many parents have a family group-chat that they’re going to accidentally ban their kids from using, not realizing that ‘social media’ might include Whatsapp? 😆
It won’t fix anything, it will make the situation for kids worse, impose costs and rents and hacks and exploits on all of us, and increase government and corporate power.
Many will lose access to their networks of support and help.
So it goes.
We will build a better more censorship resistant internet. It’s already here really: Briar. Matrix. Nostr. Bitchat. Veilid. Spritely. And the rest.
The laws may push us there faster.
The race will go on.

Very proud and excited to vote in the NDP leadership race today!!
This is not the first time I've voted in a Federal leadership race... more on that later but first, my choices! I considered only voting for two people, but I ended up filling in all 5 choices.
#1: Tanille Johnston @…
#2: Avi Lewis @…
#3: Heather McPherson
#4: Tony McQuail
#5: Rob Ashton
Why?
You might ask why I would publicize my choices. I don’t expect others to of course. It is a privilege and a right in Canada to exercise your democratic choice freely and privately, but I also think there is value in knowing how others voted.
#1 why Tanille? #electoralReform and proportional representation myself, I didn't just want to pick my top two. I wanted to make a statement on each of these candidates an influence each one.
To be blunt, Heather is #3 because she is the middle-of-the-road candidate. She is an excellent representative as MP and has gathered the support of other MPs including my own, but while I would be OK with her leadership, I would see her as a continuation of the status quo, and that is not what the NDP needs as a party, nor is it what Canada needs as a country.
We desperately need a vigorous and clear alternative to the Centre-but-mostly-Right Liberals, and the MAGA-wannabe Conservatives. The only way to do that is to catch the attention of Canadians and inspire them. I am not sure that Heather has the ability to do that, and if we continue with the same leadership crew in the NDP, I am not confident that the policy choices will be strong enough to inspire and attract Canadians.
That is why Tanille and Avi are far better options.
#4 Why Tony:

Tony is the real deal. Honestly, I would have loved to rank him higher. He represents the true life blood of rural, socially progressive, environmentally aware, Canadians. You should go check out his platform. I am so glad that he was able to participate fully in the race and we need his voice in the NDP.
#5 Why not Rob?
I have been an active member in my Union for more than 10 years. Unionism is The Way. Rob is representing a division within the union movement that claims that working people can't have jobs if the environment is put first. This is a lie.
We need union leaders that look to the future and speak honestly to people. We need union leaders who are genuinely progressive, not ready to do the bidding of corporate masters to the benefit of a few.
Working people need honesty, and when an industry is on decline, a clear path to new, excellent, union, jobs!
#CanPoli #CdnPoli #Liberal #CPC #Canada #Democracy #NDP