Tootfinder

Starting the day with going through the #bergwelten magazine once more. Sometimes I wish I'd knew the focal length of the photos.
Later we did two nice walks near #dietramszell and enjoyed spring and the sun. Wrist is also feeling better.
We saw really a lot of cyclists. But …

Bears TE Colston Loveland embracing larger role: 'I wouldn't want it any other way' https://www.nfl.com/news/bears-te-colston-loveland-embracing-larger-role-i-wouldn-t-want-it-any-other-way

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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Press freedom is further going down the drain in Trumpistan.
(Sorry, behind a paywall. But the first few sentences are the most important anyway.)
https://www.washingtonpost.com/business/2026/03/23/pentagon-press-annex-policy-defeat/

that bittersweet feeling of opening a used book & finding a sweet bookmark from a long-departed bookstore in a faraway place (closed in 1999, according to reddit) #books

"#Gamification in #Libraries: A Bibliometric Study"
https://doi.org/10.18785/slis.1301.12

Thirty-six horses were killed in a barn fire in North Carolina on Sunday afternoon.
The blaze broke out around 12:45 p.m. at the Callicutt Stables on Highway 220 Alternate in Randolph County, multiple fire departments said.
By the time firefighters got to the stable, the 15,000-square-foot barn was already engulfed in flames.
Several fire departments were called in to battle the blaze.
Crews were at the stable for five hours on Sunday.
Despite firefighters’ effor…

36 horses die in fire that engulfed boarding stable, officials say
The fire marshal is investigating the cause of the blaze that destroyed the 15,000-square-foot facility.

Replaced article(s) found for math.SG. https://arxiv.org/list/math.SG/new
[1/1]:
- Symplectic foliated fillings of sphere cotangent bundles
Francisco Presas, Sushmita Venugopalan
https://arxiv.org/abs/1809.10363
- Instability of Legendrian knottedness, and non-regular Lagrangian concordances of knots
Georgios Dimitroglou Rizell, Roman Golovko
https://arxiv.org/abs/2409.00290 https://mastoxiv.page/@arXiv_mathSG_bot/113078258814855540
- Floer homotopy theory and degenerate Lagrangian intersections
Kenneth Blakey
https://arxiv.org/abs/2410.11478 https://mastoxiv.page/@arXiv_mathSG_bot/113316098418952654
- Slices for reductive group actions in algebraic and holomorphic symplectic geometry
Peter Crooks, Rebecca Goldin, Yiannis Loizides
https://arxiv.org/abs/2512.02956 https://mastoxiv.page/@arXiv_mathSG_bot/115654549153065527
- On the symplectic geometry of branched hyperbolic surfaces in genus two
Gianluca Faraco, Arnaud Maret
https://arxiv.org/abs/2511.23323 https://mastoxiv.page/@arXiv_mathGT_bot/115643648617235810
- Open-Closed String Field Theory from Calabi-Yau Categories and its Applications to Enumerative Ge...
Jakob Ulmer
https://arxiv.org/abs/2603.18186 https://mastoxiv.page/@arXiv_mathQA_bot/116260383969858357
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Replaced article(s) found for nlin.AO. https://arxiv.org/list/nlin.AO/new
[1/1]:
- Collective dynamics on higher-order networks
Battiston, Bick, Lucas, Mill\'an, Skardal, Zhang
https://arxiv.org/abs/2510.05253 https://mastoxiv.page/@arXiv_nlinAO_bot/115337501038715496
- Interpretable Early Warnings using Machine Learning in an Online Game-experiment
Guillaume Falmagne, Anna B. Stephenson, Simon A. Levin
https://arxiv.org/abs/2502.09880 https://mastoxiv.page/@arXiv_physicssocph_bot/114018000442685203
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