Tootfinder

Tag 5 von #MeinCamino2025
Heute ging es 30 km von Terradillos de los Templarios bis El Burgo Ranero. Frühstück gab es im schönen #Sahagun, wo man eine Urlunde für die Hälfte des Camino frances bekommen kann, selbst wenn man nicht in St. Jean gestartet ist. Die Museumskirche dort hat wunde…

He can’t even organise a party of two people 🤣🤣🤣
https://www.theguardian.com/politics/live/

Abstraction Principles and the Size of Reality
Bokai Yao
https://arxiv.org/abs/2508.21105 https://arxiv.org/pdf/2508.21105…

Abstraction Principles and the Size of Reality
The Fregean ontology can be naturally interpreted within set theory with urelements, where objects correspond to sets and urelements, and concepts to classes. Consequently, Fregean abstraction principles can be formulated as set-theoretic principles. We investigate how the size of reality-i.e., the number of urelements-interacts with these principles. We show that Basic Law V implies that for some well-ordered cardinal $κ$, there is no set of urelements of size $κ$. Building on recent work by…

SMDS-based Rigid Body Localization
Niclas F\"uhrling, Giuseppe Abreu, David Gonz\'alez G., Osvaldo Gonsa
https://arxiv.org/abs/2509.01223 https://…

SMDS-based Rigid Body Localization
We consider a novel rigid body localization (RBL) method, based only on a set of measurements of the distances, as well as the angles between sensors of the vehicle to the anchor landmark points. A key point of the proposed method is to use a variation of the super multidimensional scaling (SMDS) algorithm, where only a minor part of the complex edge kernel is used, based on the available information, which in the case of RBL is anchor-to-anchor and target-to-target information. Simulation resu…

Plenitudinous Urelements and the Definability of Cardinality
Bokai Yao
https://arxiv.org/abs/2508.20641 https://arxiv.org/pdf/2508.20641

Plenitudinous Urelements and the Definability of Cardinality
The Axiom of Plenitude asserts that every ordinal is equinumerous with a set of urelements, while its stronger form, Plenitude$^+$, extends it to all sets. We investigate these two axioms within ZF set theory with urelements. Assuming that cardinality is definable, Plenitude$^+$ unifies the Collection Principle and the Reflection Principle, which are otherwise conjectured to be non-equivalent. If either cardinality is representable or the principle of Small Violations of Choice (SVC) holds, Ple…

This is another horrifying statistic to shelve alongside the composition of global mammalian biomass:
• humans 34%
• livestock and pets 62%
• wild animals 4%
#science #biology #ecology

Jonathan Schofield (@urlyman@mastodon.social)
Attached: 1 image …Here are some highlights (lowlights): “If you drop all that old life into the container that we call Earth, and burn them, it turns out that what we burn in *1 year* weighs 100x more than everything alive today. Everything. All the whales, elephants, forests, insects, grass, crops, birds, fish, people, dogs and cats. Add up all the carbon in everything alive now, and still, in one year we burn a hundred times more.” #climateDiary

Rigid Body Localization and Tracking for 6G V2X: Algorithms, Applications, and Road to Adoption
Niclas F\"uhrling, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, David Gonz\'alez G., Gonzalo Seco-Granados, Osvaldo Gonsa
https://arxiv.org/abs/2509.01208

Rigid Body Localization and Tracking for 6G V2X: Algorithms, Applications, and Road to Adoption
Vehicle-to-everything (V2X) perception refers to a suite of technologies that empower vehicles to sense their environment and communicate with other entities, including surrounding vehicles, infrastructure, and cloud/edge networks. With the growing demands of autonomous driving, V2X perception has gained significant attention, particularly through the emergence of integrated sensing and communication (ISAC) frameworks. Within this landscape, rigid body localization (RBL) has emerged as a promis…

Donald is unhappy.
Now he knows how the rest of the world feels.
https://www.theguardian.com/world/live/202

Tonight we are celebrating another great year! We have just renewed mondays.pizza and techpizzamondays.org
:)
#urlEnjoyers

Fundamental Limits of Rigid Body Localization
Niclas F\"uhrling, Ivan Alexander Morales Sandoval, Giuseppe Thadeu Freitas de Abreu, Gonzalo Seco-Granados, David Gonz\'alez G., Osvaldo Gonsa
https://arxiv.org/abs/2507.22573

Fundamental Limits of Rigid Body Localization
We consider a novel approach to formulate the Cramér-Rao Lower Bound (CRLB) for the rigid body localization (RBL) problem, which allows us to assess the fundamental accuracy limits on the estimation of the translation and rotation of a rigid body with respect to a known reference. To that end, we adopt an information-centric construction of the Fisher information matrix (FIM), which allows to capture the contribution of each measurement towards the FIM, both in terms of input measurement types…