Tootfinder

Navigating the herd.
(There were 170 highland cattle, sometimes just a few inches away... quite a few blocking the path with their calves and feeling agitated so we had to navigate/bypass through the talus fields higher up, giving these beauties more space...)
#FootpathFriday #LandscapePhotography

Sittich-Strolch mittels mobiler Gewahrsamszelle verhaftet
https://www.polizei.bremerhaven.de/blog-leser/sittich-strolch-in-geestemuende-polizei-nimmt-schraegen-vogel-in-gewahrsam-2.html

Sittich-Strolch in Geestemünde: Polizei nimmt schrägen Vogel in Gewahrsam
Mit viel Freude und einem Sinn für leichte Prosa hat unser Kontaktpolizist aus Bremerhaven-Geestemünde einen Einsatzbericht verfasst, der zeigt: Polizeiarbeit macht Spaß – auch wenn man es bisweilen mit schrägen Vögeln zu tun hat.

Grazing incidence X-ray scattering alignment using the area detector
Edward Tortorici, Charles T. Rogers
https://arxiv.org/abs/2506.22970 https://

Grazing incidence X-ray scattering alignment using the area detector
Grazing incidence X-ray scattering experiments are designed to achieve strong scattering signals from materials, such as molecular monolayers, island films, or thin films that are localized to the surfaces of flat substrates. Optimal signals can be achieved with precise alignment of a substrate surface with the X-ray beam. Here, we outline a simple method that utilizes the area detector, generally available on such systems, to observe reflections from the sample to determine the sample-detector…

Comparing Optimization Algorithms Through the Lens of Search Behavior Analysis
Gjorgjina Cenikj, Ga\v{s}per Petelin, Tome Eftimov
https://arxiv.org/abs/2507.01668

Comparing Optimization Algorithms Through the Lens of Search Behavior Analysis
The field of numerical optimization has recently seen a surge in the development of "novel" metaheuristic algorithms, inspired by metaphors derived from natural or human-made processes, which have been widely criticized for obscuring meaningful innovations and failing to distinguish themselves from existing approaches. Aiming to address these concerns, we investigate the applicability of statistical tests for comparing algorithms based on their search behavior. We utilize the cross-match statis…

Dat moet flink naar 4711 hebben geroken.

Characterization of hyperbolic groups via random walks
Victor Gerasimov, Leonid Potyagailo
https://arxiv.org/abs/2507.22005 https://arxiv.org/pdf/2507.2200…

Characterization of hyperbolic groups via random walks
Our first result gives a partial converse to a well-known theorem of A. Ancona for hyperbolic groups. We prove that a group $G$, equipped with a symmetric probability measure whose finite support generates $G$, is hyperbolic if it is nonamenable and satisfies the following condition: for a sufficiently small $\varepsilon >0$ and $r\geqslant0$, and for every triple $(x, y, z)$, belonging to a word geodesic of the Cayley graph, the probability that a random path from $x$ to $z$ intersects the c…

Enhanced performance in quasi-isodynamic max-$J$ stellarators with a turbulent particle pinch
G. G. Plunk, A. G. Goodman, P. Xanthopoulos, P. Costello, H. M. Smith, K. Aleynikova, C. D. Beidler, M. Drevlak, P. Helander
https://arxiv.org/abs/2507.19319

Enhanced performance in quasi-isodynamic max-$J$ stellarators with a turbulent particle pinch
Recent stellarator reactor designs demonstrate mostly outward turbulent particle transport, which, without advanced fueling technology, inhibits the formation of density gradients needed for confinement. We introduce ``SQuID-$τ$'', a self-fueling quasi-isodynamic stellarator capable of sustaining density peaking through inward particle transport caused by turbulence. Temperature and density profile predictions based on high-fidelity gyrokinetic simulations demonstrate enhanced performance, sig…

Feeling Machines: Ethics, Culture, and the Rise of Emotional AI
Vivek Chavan, Arsen Cenaj, Shuyuan Shen, Ariane Bar, Srishti Binwani, Tommaso Del Becaro, Marius Funk, Lynn Greschner, Roberto Hung, Stina Klein, Romina Kleiner, Stefanie Krause, Sylwia Olbrych, Vishvapalsinhji Parmar, Jaleh Sarafraz, Daria Soroko, Daksitha Withanage Don, Chang Zhou, Hoang Thuy Duong Vu, Parastoo Semnani, Daniel Weinhardt, Elisabeth Andre, J\"org Kr\"uger, Xavier Fresquet

Feeling Machines: Ethics, Culture, and the Rise of Emotional AI
This paper explores the growing presence of emotionally responsive artificial intelligence through a critical and interdisciplinary lens. Bringing together the voices of early-career researchers from multiple fields, it explores how AI systems that simulate or interpret human emotions are reshaping our interactions in areas such as education, healthcare, mental health, caregiving, and digital life. The analysis is structured around four central themes: the ethical implications of emotional AI, …

"Georgian falsely accused in '2000 Mules' of voting fraud wants filmmaker to pay" - Election Law Blog
https://electionlawblog.org/?p=150271

Ultrafast thermal boundary conductance under large temperature discontinuities of ultrathin epitaxial Pb films on Si(111)
Christian Brand, Tobias Witte, Mohammad Tajik, Jonas D. Fortmann, Birk Finke, Michael Horn-von Hoegen
https://arxiv.org/abs/2507.13109

Ultrafast thermal boundary conductance under large temperature discontinuities of ultrathin epitaxial Pb films on Si(111)
Heat transfer is a critical aspect of modern electronics, and a deeper understanding of the underlying physics is essential for building faster, smaller, and more powerful devices with an improved performance and efficiency. In such nanoscale structures the heat transfer between two materials is limited by the finite thermal boundary conductance across their interface. Using ultrafast electron diffraction under grazing incidence we investigated the heat transfer from ultrathin epitaxial Pb film…