Tootfinder

'the observation by Marc Dunkelman that digital technology has not obliterated our social connections but rather warped them. Americans today are in constant contact with the inner ring of family and the outer ring of "tribe"—that is, people we follow online, often because we share something in common, such as a sports allegiance or a political ideology. But the middle ring of community has atrophied. We know our online avatars better than we know our neighbors; we interact wit…

The Death of Partying in the U.S.A.—and Why It Matters
Young Americans today spend 70 percent less time attending or hosting parties than they did at the beginning of the 21st century. Why?

Quick tip for those with young kids who want them to learn how to use a watch with an analogue (dial) style interface.
While the likes of Flik Flak make nice kids watches, they are a little on the pricy side.
Potentially better IMHO however are these kids field/pilot style watches from AliExpress. They cost basically nothing [<$5🇺🇸] and the hour hand points to an inner ring of numbered hours, while the minute hand points to an outer ring of numbered minutes. So simple!

Simulation of MAPS and a MAPS-based Inner Tracker for the Super Tau-Charm Facility
Ruiyang Zhang, Dongwei Xuan, Jiajun Qin, Lei Zhao, Le Xiao, Xiangming Sun, Lailin Xu, Jianbei Liu
https://arxiv.org/abs/2506.03712

Simulation of MAPS and a MAPS-based Inner Tracker for the Super Tau-Charm Facility
Monolithic Active Pixel Sensors (MAPS) are a promising detector candidate for the inner tracker of the Super Tau-Charm Facility (STCF). To evaluate the performance of MAPS and the MAPS-based inner tracker, a dedicated simulation workflow has been developed, offering essential insights for detector design and optimization. The intrinsic characteristics of MAPS, designed using several fabrication processes and pixel geometries, were investigated through a combination of Technology Computer Aide…

Model for the Thermodynamics of Iron at High Pressures Near Melting
Rann Shikler, Noya Dimanstein Firman, Yinon Ashkenazy
https://arxiv.org/abs/2506.03386 …

Model for the Thermodynamics of Iron at High Pressures Near Melting
The Fe pressure-temperature phase diagram and its melting line have a wide range of applications, including providing constraints for iron-core planetary models. We propose an equation of state (EOS) model based on the interstitial theory of simple condensed matter (ITCM), as suggested by A.V. Granato. When applied to Fe, this model enables the extrapolation of measured melting lines to the conditions of the Earth's inner core boundary (ICB). The ITCM describes the solid-liquid phase transition…

Feasibility of interferometric observations and characterization of planet-induced structures at sub au to au scales in protoplanetary disks
Lukas Hildebrandt, Anton Krieger, Hubert Klahr, Julia Kobus, Alexander Bensberg, Sebastian Wolf
https://arxiv.org/abs/2506.17024

Feasibility of interferometric observations and characterization of planet-induced structures at sub au to au scales in protoplanetary disks
Interferometric observations of protoplanetary disks by VLTI and ALMA have greatly improved our understanding of the detailed structure of these planetary birthplaces. These observations have revealed a variety of large-scale disk substructures, including rings, gaps, and spirals, spanning tens to hundreds of au, supporting the predictions of planet formation models. Recent instruments, such as MATISSE at the VLTI, allow one to resolve and investigate the inner few au of protoplanetary disks in…

A first-order method for nonconvex-nonconcave minimax problems under a local Kurdyka-\L{}ojasiewicz condition
Zhaosong Lu, Xiangyuan Wang
https://arxiv.org/abs/2507.01932

A first-order method for nonconvex-nonconcave minimax problems under a local Kurdyka-Łojasiewicz condition
We study a class of nonconvex-nonconcave minimax problems in which the inner maximization problem satisfies a local Kurdyka-Łojasiewicz (KL) condition that may vary with the outer minimization variable. In contrast to the global KL or Polyak-Łojasiewicz (PL) conditions commonly assumed in the literature -- which are significantly stronger and often too restrictive in practice -- this local KL condition accommodates a broader range of practical scenarios. However, it also introduces new analyt…

Thermoresponsive copolymer microgels synthesized via single-step precipitation polymerization: random or block structure?
Letizia Tavagnacco, Elena Buratti, Jacopo Vialetto, Francesco Brasili, Elisa Ballin, Kuno Schw\"arzer, Jitendra Mata, Graziano Di Carmine, Monica Bertoldo, Ester Chiessi, Marco Laurati, Emanuela Zaccarelli
https://…

Thermoresponsive copolymer microgels synthesized via single-step precipitation polymerization: random or block structure?
The inner structure of polymeric particles critically influences their phase behavior and functionality, governing their mechanical properties and their physical and chemical interactions. For thermoresponsive microgels, i.e. colloidal particles comprising a crosslinked polymer network that undergo a volume transition upon temperature changes, structural control is key to tailor the material responsivity and broaden the range of applications. In this work, we present a comprehensive investigati…