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@leftsidestory@mstdn.social
2025-09-28 00:30:00

Concrete Jungle II 🏗️
水泥丛林 II 🏗️
📷 Pentax MX
🎞️ Ilford HP5 Plus, expired 1993
#filmphotography #Photography #blackandwhite

Ilford HP5 Plus 400 (FF) English Alt Text: A monochrome image of a city walkway lined with trees and benches. The path is paved and flanked by modern buildings with large glass windows. Two people sit on a bench in the foreground, while others walk or stand further down the path. Each tree is planted in a rectangular plot filled with white stones. The photo has a grainy texture, suggesting it was taken with film or edited for a vintage look. The scene feels peaceful and urban, with a balance o…
Ilford HP5 Plus 400 (FF) English Alt Text: A moody black-and-white photo of an urban scene. In the foreground, a tall streetlight stands beside bare tree branches that stretch across the frame. Two tall buildings rise in the background, one partially obscured and the other featuring a triangular architectural element at its peak. The sky is overcast or foggy, creating a somber, atmospheric tone. The contrast between the natural branches and rigid buildings adds visual tension and depth. 中文替代文…
Ilford HP5 Plus 400 (FF) English Alt Text: A striking abstract sculpture made of stone stands outdoors in a modern urban setting. The sculpture features interlocking curved and rectangular shapes with ribbed textures, forming a complex geometric design. It rests on a circular base covered in white pebbles. Surrounding the sculpture are trees and sleek buildings, suggesting a public art installation. The interplay of shapes and textures invites interpretation, evoking thoughts of movement, bala…
Ilford HP5 Plus 400 (FF) English Alt Text: A black-and-white photo of a quiet outdoor patio. Several wireframe chairs and a matching table sit on a grassy surface. The furniture is made of thin metal rods forming a mesh pattern, giving it a light, airy appearance. Behind the seating area is a modern building with large glass panels and vertical blinds, reflecting soft light. The composition is minimalistic, with clean lines and a mid-century modern aesthetic. Shadows from the furniture and bui…
@audiodump@podcasts.social
2025-08-27 17:12:45

Flauscht schon mal vor, gleich geht’s los.
#live
Yes we can.

Paul Rudd No GIF by VVS FILMS
@arXiv_mathNT_bot@mastoxiv.page
2025-08-27 09:38:52

Galois theory by calculator
Thomas W. Mattman, Robertson-Figaniak, Zoe Steele
arxiv.org/abs/2508.18595 arxiv.org/pdf/2508.18595

Galois theory by calculator
We present an algorithm to determine the Galois group of an irreducible monic polynomial $f(x) \in \mathbb{Z}[x]$ of degree at most five. Following work of Conrad, Dummit, and Stauduhar this comes down to answering two questions: Is a given integer a square? and Does a given polynomial have an integral root? Since these are both easily addressed with a calculator, our algorithm amounts to Galois theory by calculator. For example, we have an implementation at Desmos.com. In an appendix we presen…

@arXiv_astrophGA_bot@mastoxiv.page
2025-08-28 08:08:31

The mass of the Milky Way from outer halo stars measured by DESI DR1
Gustavo E. Medina, Ting S. Li, Gwendolyn M. Eadie, Alexander H. Riley, Monica Valluri, Nabeel Rehemtulla, Jiaxin Han, Wenting Wang, Amanda Bystr\"om, Leandro Beraldo e Silva, S. E. Koposov, N. R. Sandford, R. G. Carlberg, M. Lambert, O. Y. Gnedin, A. P. Cooper, J. Garc\'ia-Bellido, N. Kizhuprakkat, B. A. Weaver, J. Aguilar, S. Ahlen, A. Anand, D. Bianchi, D. Brooks, T. Claybaugh, A. Cuceu, A. de la Macorra, P…

The mass of the Milky Way from outer halo stars measured by DESI DR1
As a benchmark for galaxy evolution and dark matter studies, the total mass of the Milky Way is a parameter of cosmological significance, and its value at large radii from the Galactic center remains highly uncertain. Following a hierarchical Bayesian inference approach, we measure the cumulative mass of the Milky Way using full 6D phase-space information of stars from the first data release of the Dark Energy Spectroscopic Instrument (DESI). We employ 330 blue horizontal-branch stars (BHBs) an…

@arXiv_astrophCO_bot@mastoxiv.page
2025-08-27 08:05:53

Signatures and bias assessment of rotation in galaxy cluster members
Davide Castellani, Giovanni Ferrami, Claudio Grillo, Giuseppe Bertin
arxiv.org/abs/2508.18354

Signatures and bias assessment of rotation in galaxy cluster members
We investigate the possible presence of systematic rotation in the member galaxies of a sample of 17 nearby ($z<0.1$), rich (at least 80 identified members) Abell clusters. We also assess the extent to which low-number statistics may influence the recovery of the rotation parameters. Following the methods often used in the context of globular clusters and of clusters of galaxies, we estimate a representative value of the systematic rotation velocity and the position angle of the projected rotat…

@drgeraint@glasgow.social
2025-10-21 21:42:44

"if someone has taken a life through dangerous driving, we have to ask: why should they ever be allowed to drive again?"
Good question!
APPGCW and APPGTS asking the right questions and reaching the right answers.
road.cc/content/news/mps-warn-

MPs demand lifetime driving bans and stricter phone laws to address justice system "failing" families of those killed in collisions
"This report shines a light on the urgent need for reform. It's unacceptable that drivers who take lives through recklessness are allowed back on the roads while grieving families are left without a sense of justice"

@arXiv_condmatsuprcon_bot@mastoxiv.page
2025-08-25 08:56:40

Signatures of spin-glass superconductivity in nickelate (La, Pr, Sm)3Ni2O7 films
Haoran Ji, Zheyuan Xie, Yaqi Chen, Guangdi Zhou, Longxin Pan, Heng Wang, Haoliang Huang, Jun Ge, Yi Liu, Guang-Ming Zhang, Ziqiang Wang, Qi-Kun Xue, Zhuoyu Chen, Jian Wang
arxiv.org/abs/2508.16412

Signatures of spin-glass superconductivity in nickelate (La, Pr, Sm)3Ni2O7 films
The discovery of Ruddlesden-Popper (R-P) nickelate superconductors under high pressure heralds a new chapter of high-transition temperature (high-Tc) superconductivity. Recently, ambient-pressure superconductivity is achieved in R-P bilayer nickelate thin films through epitaxial compressive strain, unlocking in-depth investigations into the superconducting characteristics. Here, through electrical transport study, we report the observation of spin-glass superconductivity with hysteretic magneto…

@leftsidestory@mstdn.social
2025-09-27 00:30:03

Concrete Jungle 🏗️
水泥丛林 🏗️
📷 Pentax MX
🎞️ Ilford HP5 Plus, expired 1993
#filmphotography #Photography #blackandwhite

Ilford HP5 Plus 400 (FF) English Alt Text: A grainy black-and-white photo of a staircase leading upward. At the top, two sharing bikes rest side by side near a brick wall. Handrails border both sides of the stairs. A tree is visible beyond the wall. The composition suggests a contrast between mobility and stillness. 中文替代文字： 一张黑白颗粒感照片，画面是一段通向上方的楼梯。楼梯顶端靠墙放着两辆共享单车彼此并列。楼梯两侧有扶手，墙外可见一棵树。画面构图富有行动与静止的对比。
Ilford HP5 Plus 400 (FF) English Alt Text: A black-and-white image of an outdoor construction or storage site. Stacks of bricks and concrete blocks dominate the foreground, some covered with tarps. Behind them, a fence encloses the area, with trees and a partially visible vehicle beyond. The grainy texture and muted tones give the scene a raw, industrial, and slightly nostalgic atmosphere. 中文替代文字： 一张黑白照片，展示一个户外施工或储存场地。前景是堆叠的砖块和混凝土块，有些覆盖着防水布。背景中有围栏，围栏外是树木和一辆部分可见的车辆。颗粒感和灰暗色调营造出粗犷的工业氛围，略带怀旧气息。
Ilford HP5 Plus 400 (FF) English Alt Text: A tranquil garden scene in black and white. In the foreground, blooming roses with soft petals are surrounded by leafy bushes and dense plants. A lone path runs behind the garden, separating it from a backdrop of tall, shadowy trees. The trees form a natural curtain, adding depth and serenity. The monochrome tone evokes nostalgia and quiet beauty, with soft contrasts between light and shade. 中文替代文字： 一幅黑白花园景象。前景中盛开的玫瑰花瓣柔美，四周环绕着茂密的灌木和植物。花园后方是一条幽闭的小径，背后…
Ilford HP5 Plus 400 (FF) English Alt Text: A bustling urban walkway flanked by tall office buildings with grid-like glass facades. People walk or sit along the path, some near bollards that separate the walkway from the road. In the distance, a skyscraper with a crown-like top rises prominently. Signs in English and Asian characters are visible. The black-and-white palette gives the scene a timeless, documentary feel. 中文替代文字： 一条繁忙的城市步道，两侧是高大的办公楼，玻璃幕墙呈网格状。行人沿路行走或坐在路边，有些靠近分隔道路的柱墩。远处一座顶部如皇冠般的摩天大…
@arXiv_astrophGA_bot@mastoxiv.page
2025-08-27 09:30:52

Ionizing Radiation Escape from Low-Redshift Galaxies and Its Connection to Cosmic Reionization
Anne E. Jaskot
arxiv.org/abs/2508.18411 arxi…

Ionizing Radiation Escape from Low-Redshift Galaxies and Its Connection to Cosmic Reionization
The escape of Lyman continuum (LyC) radiation from early galaxies transformed the intergalactic medium (IGM) and is intimately connected to the fueling and feedback processes that regulate galaxy evolution. IGM attenuation interferes with high-redshift LyC observations, but growing samples of LyC observations at z<0.1 are revealing the properties of LyC-emitting galaxies. Along with multi-wavelength observations of nearby LyC-emitting candidates, cosmological simulations, and simulations of LyC…

@leftsidestory@mstdn.social
2025-09-26 00:30:02

Foggy fog 🌫️
雾雾的雾 🌫️
📷 Pentax MX
🎞️ Ilford HP5 Plus, expired 1993
#filmphotography #Photography #blackandwhite

Ilford HP5 Plus 400 (FF) English Alt Text: A black-and-white photo of outdoor furniture arranged in neat stacks. On the left, two tall columns of plastic stools are nested together, each stool featuring small ventilation holes on top. On the right, a stack of plastic chairs with curved backrests and metal legs leans slightly. The chairs are also nested, forming a compact tower. The ground is paved, and a metal rod lies nearby. In the upper left corner, wooden steps suggest proximity to a build…
Ilford HP5 Plus 400 (FF) English Alt Text: A black-and-white photo of a city street scene. In the foreground, a circular traffic sign displays the number “50,” indicating a speed limit of 50 km/h. Below it, a rectangular sign with Chinese characters reads “Shuangjing Bridge – Jingguang Bridge.” The signs are mounted on a pole near a leafy tree. In the background, cars and a motorcycle move along a wide road flanked by buildings, including a high-rise and a long residential block. The grainy te…
Ilford HP5 Plus 400 (FF) English Alt Text: A monochrome photo of a city skyline shrouded in smog or fog. Several tall buildings are visible, including a striking skyscraper shaped like a twisted column. A green traffic light glows in the foreground, mounted on a pole near streetlights and an overpass. The air appears thick, reducing visibility and softening the outlines of buildings. The image evokes urban density and environmental tension, with a quiet, surreal mood. 中文替代文本： 这是一张黑白城市天际线照片，画面…
Ilford HP5 Plus 400 (FF) English Alt Text: A black-and-white photo taken from inside a tunnel or underpass, looking out onto a busy urban road. Several people ride scooters or motorcycles, while one person walks along the sidewalk. The road continues under a series of elevated structures supported by thick columns. In the distance, a bus and a car are visible. The tunnel’s shadow frames the scene, creating strong contrasts between light and dark. The photo captures a moment of city life in mot…