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@cosmos4u@scicomm.xyz
2025-12-11 14:36:18

Multispacecraft Measurements of the Evolving Geometry of the Solar #Alfvén Surface over Half a Solar Cycle: iopscience.iop.org/article/10. -> Astronomers Create First Map of the Sun's Outer Boundary: cfa.harvard.edu/news/astronome

@fanf@mendeddrum.org
2026-01-01 09:42:01

from my link log —
What if the world is made of cubes? Uncovering the universal geometry of geology.
quantamagazine.org/geometry-re
saved 2020-11-22

Geometry Reveals How the World Is Assembled From Cubes
An exercise in pure mathematics has led to a wide-ranging theory of how the world comes together.

@leftsidestory@mstdn.social
2025-12-11 01:11:47

Metropolitana 🔶
城 🔶
📷 Pentax MX
🎞️ Ilford Pan 100
#filmphotography #Photography #blackandwhite

Ilford Pan 100 (FF) English Alt Text: A close-up black-and-white image of a metal ashtray. Inside, there’s a partially smoked cigarette, a dry leaf, and scattered ashes. The ashtray has a circular opening in the center and shows signs of frequent use with stains and debris. The composition evokes themes of habit, decay, and stillness, offering a quiet, contemplative moment frozen in time. 中文替代文本： 这是一张黑白特写照片，展示一个金属烟灰缸。烟灰缸内有一根抽了一半的香烟、一片干叶和散落的烟灰。中央有一个圆形开口，表面污渍斑斑，显示出频繁使用的痕迹。画面传达出习惯、衰败与静止的主题，呈现一个凝…
Ilford Pan 100 (FF) English Alt Text: A black-and-white photo taken from inside a public bus. The foreground shows the back of a person’s head seated near a window, with another passenger seated further ahead. The bus seats have modern headrests and handles. Sunlight filters through the window, casting reflections of the interior and revealing an exterior view of a staircase and railing, suggesting the bus is near a pedestrian overpass or station. The mood is quiet and observational, capturing…
Ilford Pan 100 (FF) English Alt Text: A black-and-white urban photograph featuring a large metal sculpture spelling “METRO” in capital letters. The sculpture stands in front of a modern glass building, which also displays the word “METRO” above its entrance. Two people are partially visible behind the letters—one seated, one leaning forward. Reflections of pedestrians appear on the glossy surface below. Trees and bushes add greenery to the scene. The composition blends architecture, typography…
Ilford Pan 100 (FF) English Alt Text: A black-and-white photo of a public art installation in an urban plaza. The central sculpture is a large hyperboloid structure made of metal rods, surrounded by flowing metal tubes. In the foreground stands a flame-like sculpture made of perforated metal sheets. The ground features circular patterns. Background signage in Chinese and English suggests the location is in a Chinese-speaking region. The scene merges geometry, engineering, and artistic expressi…
@arXiv_physicsinsdet_bot@mastoxiv.page
2026-02-10 08:33:26

Geometry-driven impact of photosensor placement on S2-based XY reconstruction in a dual-phase argon TPC
Jilong Yin, Yi Wang
arxiv.org/abs/2602.08402

@wrog@mastodon.murkworks.net
2026-01-08 15:31:41

I decided it was time for another go at explaining Special Relativity.
I remain annoyed at how few people really get it, even amongst avid SF consumers, who have gotten entirely too accustomed to generations of SF writers papering over the FTL issues with technobabble, 'cause we need that galactic empire, don'tcha know.
The idea is to do this with basic geometry you knew or could have learned about in 6th grade plus a bit of algebra (up to Pythagorean Theorem, which I *d…

@Cognessence@social.linux.pizza
2025-12-05 20:18:07

Since the release of my last two albums, I have been working on a new album, due out with Evel Records in January. As we move into the new year, I felt to share one of its tracks - 'Geometry of Birds' - ahead of time.
I hope you enjoy. 🙏
youtube.com/watch?v=F…

@leftsidestory@mstdn.social
2026-01-09 00:30:03

Urban Texture III 🧩
城市质地 III 🧩
📷 Nikon F4E
🎞️ ERA 100, expired 1993
#filmphotography #Photography #blackandwhite

ERA 100 (FF) English Alt Text: A black-and-white photo showing the edge of a rooftop lined with jagged glass shards embedded in cement, likely for security. The shards glint faintly against an overcast sky. In the background, utility poles with tangled electrical wires and ceramic insulators stretch across the frame. On the right, dried plant stems hang over the rooftop, their brittle texture contrasting with the hard glass and concrete. The image evokes a sense of urban decay and quiet tensio…
ERA 100 (FF) English Alt Text: A monochrome image of a fenced-off area, likely under construction or restricted. The metal fence bears handwritten Chinese characters: “No entry” and “No peddling.” Behind the fence are tall trees and a power line running horizontally. In the foreground, a covered object with a brick on top sits near a streetlamp. The scene feels quiet and controlled, with signs of urban regulation and exclusion. 中文替代文字： 这是一张黑白照片，显示一个被金属围栏封锁的区域，可能是施工或限制通行的场所。围栏上手写着中文：“禁止通行”和“禁…
ERA 100 (FF) English Alt Text: A grayscale photo showing several concrete blocks arranged on a grassy patch. Some blocks stand upright, others lie flat. They are partially covered with coarse, weathered fabric—possibly burlap—with visible holes and frayed edges. The background includes tiled pavement and more grass. The scene suggests a temporary construction setup or abandoned materials, with textures of rough stone and worn cloth. 中文替代文字： 这是一张灰度照片，画面中有几块混凝土砖块摆放在草地上，有的竖立，有的平躺。砖块部分被粗糙、风化的布料覆…
ERA 100 (FF) English Alt Text: A black-and-white image capturing a dense network of utility poles and electrical wires. Multiple concrete poles are fitted with insulators, transformers, and other components. Wires crisscross in various directions, forming a complex web. The monochrome palette emphasizes the geometry and industrial feel of the infrastructure. The image reflects the intricacy and importance of urban power distribution systems. 中文替代文字： 这是一张黑白照片，展示了密集的电力基础设施网络。多个混凝土电线杆上安装有绝缘器、变压器…
@fanf@mendeddrum.org
2026-01-12 12:42:03

from my link log —
A unique performance optimization for a 3D geometry language.
cprimozic.net/notes/posts/pers
saved 2026-01-11

A Unique Performance Optimization for a 3D Geometry Language
For the past several months, I’ve been working on a programming language called Geoscript. It’s specialized for generating and manipulating 3D geometry for use in a Shadertoy-inspired web app called Geotoy.

@leftsidestory@mstdn.social
2025-12-07 00:14:26

Moody Urbanity - Urbana Composita 🌆
情绪化城市 - 建构城市 🌆
📷 Zeiss Ikon Super Ikonta 533/16
🎞️ Ilford HP5 Plus 400, expired 1993
#filmphotography #Photography #blackandwhite

Ilford HP5 (6x6) English Alt Text: A black-and-white photograph showing a construction crane rising above a sharply angled roofline. The roof cuts diagonally across the image from bottom left to top right, creating a dynamic composition. The crane’s arm extends into the grainy sky, which dominates the upper half of the frame. The contrast between the dark roof and bright sky emphasizes architectural geometry and industrial presence. The image feels stark and modern, with a minimalist aesthetic…
Ilford HP5 Plus (6x6) English Alt Text: A grainy black-and-white photo of a city street. In the foreground, a person stands on the sidewalk looking down at a device, possibly a phone. A car speeds past, slightly blurred from motion. Behind the person, mid-rise buildings with Chinese signage suggest commercial activity. Power lines crisscross above, and tree branches frame the top of the image. The scene captures a candid moment of daily life, blending human presence, movement, and urban textur…
Ilford HP5 Plus (6x6) English Alt Text: A monochrome image of a pedestrian overpass in a city. Two people ascend a stairway bordered by metal railings. Above them, a bridge spans the width of the image, connecting walkways. Tree branches with leaves stretch into the frame from the top left, casting shadows. In the background, buildings and urban infrastructure suggest a busy environment. The composition uses strong lines and contrast to guide the viewer’s eye upward, evoking movement and urban…
Ilford HP5 Plus (6x6) English Alt Text: A black-and-white photo of a quiet urban street corner. Three traffic cones sit in the foreground, one tipped over, suggesting recent movement or disruption. A large vertical barrier with diagonal stripes marks a construction or restricted zone on the left. Behind the cones, white metal barricades line the sidewalk. A tree casts soft shadows across the pavement, adding texture. In the background, a multi-story residential building with balconies and wind…
@leftsidestory@mstdn.social
2026-01-01 00:30:01

Urban Mirage 👁️‍🗨️
城市幻境 👁️‍🗨️
📷 Nikon F4E
🎞️ Ilford HP5 Plus 400, expired 1993
#filmphotography #Photography #blackandwhite

Ilford HP5 Plus 400 (FF) English Alt Text: A black-and-white photo capturing the reflection of a domed, ornate historic building in the glass facade of a modern skyscraper. The glass panels create a grid that distorts and segments the reflection, blending old and new architectural styles. The contrast between classical detailing and modern geometry creates a visually compelling composition. 中文替代文本： 这是一张黑白照片，拍摄的是一座现代高楼玻璃幕墙中反射出的历史建筑。被反射的建筑顶部有圆顶，装饰精美，具有古典风格。玻璃幕墙呈网格状，使反射图像产生扭曲和分割效果，形成新旧建筑风格的融合。古典…
Ilford HP5 Plus 400 (FF) English Alt Text: A black-and-white photo of a dramatic sculpture featuring several stylized figures in military attire. One figure raises a clenched fist, while others hold rifles, evoking themes of revolution and resistance. The background resembles a crowd or explosion, adding intensity. To the left, a street sign reads “XUSONG LU N” and “徐宋路 北,” indicating North Xusong Road. The juxtaposition of modern signage and historical monument suggests a place of cultural or…
Ilford HP5 Plus 400 (FF) English Alt Text: A black-and-white photo showing a convex traffic mirror mounted beside a road. The mirror reflects a curved road with a vehicle and a cyclist. Behind the mirror is a wall with Chinese signs that read “请减速靠右” and “注意文明礼让,” meaning “Please slow down and keep right” and “Pay attention to civility and courtesy.” The image emphasizes road safety and public behavior in an urban setting. 中文替代文本： 这是一张黑白照片，展示了一个安装在路边的凸面交通镜。镜中反射出一条弯曲的道路，一辆车和一名骑自行车的人正在行驶。镜子后方的墙…
Ilford HP5 Plus 400 (FF) English Alt Text: A black-and-white close-up of a modern high-rise apartment building. The facade features a grid of rectangular windows and balconies. Vertical and horizontal lines form a repetitive pattern, while shadows cast across the surface add depth and contrast. The image highlights architectural geometry and the interplay of light and shadow. 中文替代文本： 这是一张黑白特写照片，展示了一栋现代高层住宅楼。建筑外立面由矩形窗户和阳台组成网格结构，垂直与水平线条形成重复图案。光影在建筑表面投下阴影，增强了画面的层次感和对比度。画面突出了建筑的几何美感以及光影之间的互动。