Tootfinder

Linsen in VR-Brillen: Zwischen Schärfe, Gewicht und optischen Nebenwirkungen
Fresnel, Pancake oder asphärisch: In VR-Brillen steckt viel optisches Know-how, doch die Wahl der richtigen Linse bleibt ein Kompromissgeschäft.

Läs den här texten av Elisabeth Åsbrink. "Varje dag tänker jag på Raphael Lemkins fråga om folkmord" https://www.dn.se/kultur/elisabeth-asbrink-varje-dag-tanker-jag-pa-raphael-lemkins-fraga-om-folkmord/

Elisabeth Åsbrink: Varje dag tänker jag på folkmord
Juristen Raphael Lemkin visste att folkmord har skett förr och därför kan det ske igen, skriver Elisabeth Åsbrink om dagens Gaza.

⏰ New study challenges assumptions linking racial attitudes and political identity in U.S. cities
https://phys.org/news/2025-06-assumptions-linking-racial-attitudes-political.html

New study challenges assumptions linking racial attitudes and political identity in U.S. cities
Nearly 40% of U.S. cities analyzed in a study in NPJ Complexity diverge from the common narrative that Republican-dominated areas have high levels of implicit racial bias while Democratic strongholds are more tolerant.

DJI-Drohnen verschwinden langsam aus US-Verkaufsregalen
In den USA läuft es nicht gut für DJI. Drohnen des chinesischen Herstellers sind aufgrund verschiedener Regierungsmaßnahmen offiziell nur schwer zu bekommen.

Future Parameter Constraints from Weak Lensing CMB and Galaxy Lensing Power- and Bispectra
Jonas Frugte, P. Daniel Meerburg
https://arxiv.org/abs/2507.20262 https://

Future Parameter Constraints from Weak Lensing CMB and Galaxy Lensing Power- and Bispectra
Upcoming stage 4 surveys, such as the Simons Observatory, LSST, and Euclid, are poised to measure weak gravitational lensing of the Cosmic Microwave Background (CMB) and galaxies with unprecedented precision. While the power spectrum is the standard statistic used to analyze weak lensing data, non-Gaussianity from non-linear structure growth encodes additional cosmological information in higher-order statistics. We forecast the ability of future surveys to constrain cosmological parameters usin…

Gravitational lensing of fast radio bursts: prospects for probing microlens populations in lensing galaxies
Ashish Kumar Meena, Prasenjit Saha
https://arxiv.org/abs/2507.20305 h…

Gravitational lensing of fast radio bursts: prospects for probing microlens populations in lensing galaxies
Gravitational lensing by a stellar microlens of mass $M$ forms two images separated by micro-arcseconds on the sky and has a time delay of $2\times10^{-5}(M/{\rm M_\odot})$ seconds. Although we cannot resolve such micro-images in the sky, they could be resolved in time if the source is a fast radio burst (FRB). In this work, we study the magnification ($|μ|$) and time delay~($t_d$) distributions of micro-images led by different microlens populations. We find that, in microlensing of …

IRS Chief Says Direct File Is 'Gone,' Other Audit Tech Is Coming (Erin Slowey/Bloomberg Tax)
https://news.bloombergtax.com/daily-tax-report/irs-chief-says-direct-file-is-gone-other-audit-tech-is-coming?link_source=ta_bluesky_link&taid=6888c5e198449400013024d1
http://www.memeorandum.com/250729/p136#a250729p136

Lensing Without Borders: Measurements of galaxy-galaxy lensing and projected galaxy clustering in DESI DR1
S. Heydenreich, A. Leauthaud, C. Blake, Z. Sun, J. U. Lange, T. Zhang, M. DeMartino, A. J. Ross, J. Aguilar, S. Ahlen, D. Bianchi, D. Brooks, F. J. Castander, T. Claybaugh, A. Cuceu, A. de la Macorra, J. DeRose, Arjun Dey, Biprateep Dey, P. Doel, N. Emas, S. Ferraro, A. Font-Ribera, J. E. Forero-Romero, C. Garcia-Quintero, E. Gazta\~naga, S. Gontcho A Gontcho, G. Gutierrez, B. Had…

Lensing Without Borders: Measurements of galaxy-galaxy lensing and projected galaxy clustering in DESI DR1
We present Galaxy-Galaxy Lensing measurements obtained by cross-correlating spectroscopically observed galaxies from the first data release of the Dark Energy Spectroscopic Instrument (DESI) with source galaxies from the Hyper Suprime-Cam Subaru Strategic Survey, the Kilo-Degree Survey, the Sloan Digital Sky Survey, and the Dark Energy Survey. Specifically, we measure the excess surface mass density $ΔΣ$ and tangential shear $γ_\mathrm{t}$ for the Bright Galaxy Sample and Luminous Red Galaxi…

The Discourse Is Broken -- That's not necessarily a good thing. (Charlie Warzel/The Atlantic)
https://www.theatlantic.com/technology/archive/2025/07/sydney-sweeney-american-eagle-ads/683704/?gift=bQgJMMVzeo8RHHcE1_KM0Rqh-RBCXaXmzfBoTU_lwXk&utm_source=copy-link&utm_medium=social&utm_campaign=share
http://www.memeorandum.com/250730/p51#a250730p51

The Concordance of Weak Lensing and Escape Velocity Mass Estimates for Galaxy Clusters
Alexander Rodriguez, Christopher J. Miller
https://arxiv.org/abs/2507.20938 https://

The Concordance of Weak Lensing and Escape Velocity Mass Estimates for Galaxy Clusters
In the $Λ$CDM paradigm, the masses of the galaxy clusters inferred using background galaxies via weak-lensing shear should agree with the masses measured using the galaxy projected radius-velocity phase-space data via the escape velocity profile. However, prior work indicates that the correlation between caustic-inferred escape masses and weak lensing masses is statistically consistent with zero. Based on recent advancements in the measurement of the escape edge and its physical interpretation…