Tootfinder

Air-Stable Room-Temperature Quasi-2D Tin Iodide Perovskite Microlasers
Sangyeon Cho, Wenhao Shao, Jeong Hui Kim, Letian Dou, Seok-Hyun Yun
https://arxiv.org/abs/2507.08180

Air-Stable Room-Temperature Quasi-2D Tin Iodide Perovskite Microlasers
Quasi-2D tin iodide perovskites (TIPs) are promising lead-free alternatives for optoelectronic applications, but achieving stable lasing remains challenging due to their limited environmental stability. Here, we report air-stable, room-temperature lasing from quasi-2D TIP microcrystals as small as 4 μm. Incorporation of the organic spacer 5IPA3 significantly enhanced the stability of these materials compared to previously reported TIPs. Lasing was observed from both dielectric (n=4) and plasmo…

Newly daylighted Canyon Creek brings lost habitat back to Spanish Banks
A long-hidden urban stream in Spanish Banks Beach Park has been brought back to the surface thanks to efforts by the Vancouver Board of Parks and Recreation.
Local Nations, community members and elected officials gathered today to celebrate the public opening of Canyon Creek, a previously buried waterway that ran through Pacific Spirit Regional Park and under the western parking lot at Spanish Banks

Newly daylighted Canyon Creek brings lost habitat back to Spanish Banks
A long-hidden urban stream in Spanish Banks Beach Park has been brought back to the surface thanks to efforts by the Vancouver Board of Parks and Recreation.

A Framework for Auditing Chatbots for Dialect-Based Quality-of-Service Harms
Emma Harvey, Rene F. Kizilcec, Allison Koenecke
https://arxiv.org/abs/2506.04419

A Framework for Auditing Chatbots for Dialect-Based Quality-of-Service Harms
Increasingly, individuals who engage in online activities are expected to interact with large language model (LLM)-based chatbots. Prior work has shown that LLMs can display dialect bias, which occurs when they produce harmful responses when prompted with text written in minoritized dialects. However, whether and how this bias propagates to systems built on top of LLMs, such as chatbots, is still unclear. We conduct a review of existing approaches for auditing LLMs for dialect bias and show tha…

Deltog i OSSEs parlamentariska församling i Porto på inbjudan av ukrainska delegationen kring hybridkrigföring. Att lyssna till kollegor från frontlinjen i det kognitiva kriget gav skärpa. Systematisk rysk påverkan testas i Ukraina, används mot oss.
https://carlheath.se/reflektioner-…

Photonic bandgap properties of hyperuniform systems self-assembled in a microfluidic channel
Lily Traktman, Bowen Yu, Isa Vasquez, Stanislav Ospov, Remi Dreyfus, Weining Man
https://arxiv.org/abs/2507.08613

Photonic bandgap properties of hyperuniform systems self-assembled in a microfluidic channel
Traditional self-assembly methods often rely on densely packed colloidal crystalline structures and have inherent limitations in generating materials with isotropic photonic bandgaps (PBG). This study explores the photonic properties of materials structured according to hyperuniform disordered patterns (HUDS) generated via a hydrodynamic process in a microchannel. This research employs simulations to characterize optical bandgaps and determine the minimum dielectric contrast required for PBG fo…

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雨咏叹调 🎶
📷 Pentax MX
🎞️Fomapan 400 Action
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

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Superradiant Echoes Induced by Multiple Re-phasing of NV Spin Sub-ensembles Grating at Room Temperature
Qilong Wu, Yuan Zhang, Huihui Yu, Chong-Xin Shan, Klaus M{\o}lmer
https://arxiv.org/abs/2507.01328

Superradiant Echoes Induced by Multiple Re-phasing of NV Spin Sub-ensembles Grating at Room Temperature
In this Letter, we propose that superradiant echoes can be achieved at room temperature by applying a laser illumination and a microwave Hahn echo sequence to a diamond with a high concentration of nitrogen-vacancy (NV) centers placed in a dielectric microwave cavity. We identify that the combined action of two microwave driving pulses and a free evolution imprints a phase grating among NV spin sub-ensembles in frequency space, and multiple re-phasing of the grated spin sub-ensembles leads to m…

Artist: https://www.instagram.com/p/DLQDi7wtZ5z/

Piero Masztalerz | JUST A THOUGHT on Instagram: "DIE GANZE WAHRHEIT ÜBER DEN SOMMERWELS! ❗❗ #wels #pleinfeld #polizei"
6,315 likes, 76 comments - schoenescheisse.de on June 23, 2025: "DIE GANZE WAHRHEIT ÜBER DEN SOMMERWELS! ❗❗ #wels #pleinfeld #polizei".

Our evening watching the local single A ball club, the Salem Red Sox, with friends was cut short. You could see the curtain of rain rapidly advancing down the mountains and towards the ballpark.
Surprisingly they didn’t stop the game for thunder and lightning, but once the tarps came out, we knew they’d have to call it.
Instead we ended up going out for dinner, which was a delight.

Removal of Lunar Dust Simulant from Cold Dielectric Surfaces with Electron Beam
Hsin-yi Hao, Wousik Kim, David S. Shelton, Benjamin Farr, Xu Wang, Inseob Hahn
https://arxiv.org/abs/2505.24074

Removal of Lunar Dust Simulant from Cold Dielectric Surfaces with Electron Beam
It has been demonstrated that lunar dust simulant can be efficiently lofted and removed from various room temperature surfaces in vacuum when exposed to a low-energy electron beam. This provides a potential solution to the well-known dust risks associated with future lunar exploration. Considering its application in extremely cold regions on the Moon, we experimentally demonstrated dust lofting from surfaces at temperatures as low as -123degC using an electron beam. Compared to room temperature…