Tootfinder

Optimization of centroidal Voronoi tessellations
Ernesto G. Birgin, Juan S. C. Franco, Antoine Laurain
https://arxiv.org/abs/2508.17721 https://arxiv.org/p…

Optimization of centroidal Voronoi tessellations
In this paper, we investigate the optimization of Centroidal Voronoi Tessellations (CVT) under geometric constraints. For this purpose, we minimize a linear combination of the standard CVT energy functional with terms involving geometric attributes such as area and perimeter. The derivative of the objective functional with respect to the position of the generators is computed using techniques of shape calculus and sensitivity analysis of minimization diagrams. Several numerical experiments are …

I was asked if I had tackled Ditchling Beacon (South Downs) - not yet. It prompted me to record yesterday's ride to Brighton on another route (sped up to about 400 mph!)
https://www.youtube.com/watch?v=YVPwL-WPT2Q

“Military Airlift Command,” slide 2 of 24 Via https://bsky.app/profile/theslides.bsky.social/post/3lwqxvi34hh2u
https://…

🇺🇦 #NowPlaying on KEXP's #AfternoonShow
Junior:
🎵 Mama Used to Say
#Junior
https://astralblak.bandcamp.com/track/junior-mama-used-to-say
https://open.spotify.com/track/3DRyJ7FT8yCLtF0e6K5JeG

TDACloud: Point Cloud Recognition Using Topological Data Analysis
Anirban Ghosh, Ian Dahlin, Ayan Dutta
https://arxiv.org/abs/2506.18725 https://

TDACloud: Point Cloud Recognition Using Topological Data Analysis
Point cloud-based object/place recognition remains a problem of interest in applications such as autonomous driving, scene reconstruction, and localization. Extracting meaningful local descriptors from a query point cloud that can be matched with the descriptors of the collected point clouds is a challenging problem. Furthermore, when the query point cloud is noisy or has been transformed (e.g., rotated), it adds to the complexity. To this end, we propose a novel methodology, named TDACloud, us…

https://www.nextgov.com/cybersecurity/2025/07/trumps-cisa-nominee-confident-he-can-get-funding-cyber-agency-where-needed/406961/
Trump’s CISA nominee is confident he can get funding to cyber agency wh…

Trump’s CISA nominee is confident he can get funding to cyber agency where needed
Sean Plankey, a former Energy Department cyber official, tussled with Sen. Richard Blumenthal, D-Conn., over 2020 election security during his confirmation hearing. He also committed to the renewal of a key cyber information-sharing law before it soon expires.

Fast and Accurate Reconstruction of Voronoi Generators in Large Tessellations
Carlos M Hernandez-Suarez
https://arxiv.org/abs/2506.19076 https://

Fast and Accurate Reconstruction of Voronoi Generators in Large Tessellations
A Voronoi diagram partitions the plane into convex cells, each containing the points closest to a single generator. Given such a tessellation, the inverse Voronoi problem seeks the generator set \( S \) that produced it. Our algorithm selects a single interior cell with \( k \) edges and solves a compact, consistent linear system with \( 2(k+1) \) unknowns and \( 4k \) scalar equations to recover that cell's generator together with the \( k \) generators of its neighbors in one step. The remain…

Einem Artikel des sehr informativen Magazins für Teekultur "t" entnehme ich, dass die aktuelle Matchaknappheit sich auf stark erhöhte Nachfrage nach Premium-Matcha zurückführen lässt. Teetrinkende im Westen würden nun vermehrt auch für Mixgetränke Matchapulver besserer Qualität (und in größerer Menge) verwenden, u.a. auch, seit sie inflationsbedingt dazu übergingen, ihr Zeug selbst zu Hause anzurühren. Die Matcha-Jahre 2025 und 2026 bleiben spannend, so die Experten.

WATCH: Tom Brady gets tackled by Eli Manning, spits on Jets jersey in WWE-inspired walkout at Fanatics Fest

https://www.cbssports.com/nfl/news/w…

Another “Long Links” curation of long-form works that probably nobody has time for all of, but one or two of which might enrich your life. Featuring: Population shrinkage, “evitability of enshittification”, vibe-coding tales, the usual cosmology fun, a story 70 years in the making, and Equus asinus. https://www.

Long Links