Tootfinder

What a valid lab test report for #SolarEclipse glasses looks like - from an SEC talk by Richard Fienberg who also co-authored a scientific paper on this topic in 2021: https://iopscience.iop.org/article/10.3847/1538-3881/ac013e 7/n

Byron Allen settles with McDonald's over his $10B 2021 lawsuit accusing the fast food chain of racial stereotyping in its ads budget; terms were not disclosed (Jonathan Stempel/Reuters)
https://www.reuters.com/sus…

With moving my calendar away from Google I was looking for a Caldev solution, but ...
Interesting take on CalDev and encryption on Cryptpad's github page.
No chance that that will happen encrypted.
It's waiting for an solution in the Caldev protocol. 😇
[Feature request] Possibility to have CalDAV for the Calendar · Issue #823 · cryptpad/cryptpad

Mark your calendars for our upcoming events this Fall from the Love of Children program. You can read and register for these events at https://yaleyouthministryinstitute.org/upcoming-events/

Remarks on radial symmetry of stationary and uniformly-rotating solutions for the 2D Euler equation
Boquan Fan, Yuchen Wang, Weicheng Zhan
https://arxiv.org/abs/2506.05034

Remarks on radial symmetry of stationary and uniformly-rotating solutions for the 2D Euler equation
We prove that any uniformly rotating solution of the 2D incompressible Euler equation with compactly supported vorticity $ω$ must be radially symmetric whenever its angular velocity satisfies $Ω\in (-\infty,\inf ω/ 2] \cup \, [ \sup ω/ 2, +\infty )$, in both the patch and smooth settings. This result extends the rigidity theorems established in \cite{Gom2021MR4312192} (\textit{Duke Math. J.},170(13):2957-3038, 2021), which were confined to the case of non-positive angular velocities and non…

This https://arxiv.org/abs/2505.24586 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

All-sky search for individual Primordial Black Hole bursts with LHAASO
Primordial Black Holes~(PBHs) are hypothetical black holes with a wide range of masses that formed in the early universe. As a result, they may play an important cosmological role and provide a unique probe of the early universe. A PBH with an initial mass of approximately $10^{15}$~g is expected to explode today in a final burst of Hawking radiation. In this work, we conduct an all-sky search for individual PBH burst events using the data collected from March 2021 to July 2024 by the Water Che…

Very interesting talks at the #SolarEclipse Conference - https://www.vvs.be/subsite/sec-2025/programme - in Belgium I am attending online: here is the key result by Luca Quaglia who had reported his work in great detail in the papers https://iopscience.iop.org/article/10.3847/1538-4365/ac1279 (2021), https://www.iota-es.de/JOA/JOA2022_2.pdf#page=3 (2022) and https://www.iota-es.de/JOA/JOA2024_4.pdf#page=3 (2024) already. There seems to be NO way by now to escape the conclusion the the solar - i.e. photospheric - diameter used by many in the past (and various eclipse map calculations sites still today) is too small. So everyone should use Quaglia's free precision tools at https://www.besselianelements.com instead to get the real length of totality at one's observing spot. And when you are observing at the edges of the totality zone the tools will tell you where the actual border is: traditional maps can the off by some margin! 1/n

Assessing innovation in the nascent value chains of climate-mitigating technologies
Zachary H. Thomas, Ellen D. Williams, Kavita Surana, Morgan R. Edwards
https://arxiv.org/abs/2506.00010

Assessing innovation in the nascent value chains of climate-mitigating technologies
Accelerating climate-tech innovation in the formative stage of the technology life cycle is crucial to meeting climate policy goals. During this period, competing technologies are often undergoing major technical improvements within a nascent value chain. We analyze this formative stage for 14 climate-tech sectors using a dataset of 4,172 North American firms receiving 12,929 early-stage private investments between 2006 and 2021. Investments in these firms reveal that commercialization occurs i…