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@cosmos4u@scicomm.xyz
2025-12-12 19:39:05

Finally an RGB image of comet #3IATLAS from images taken by #GeminiNorth during the 26 November #shadowTheScientists session: noirlab.edu/public/news/noirla - the coma has become bluer due to more gas emission. Also published today: an X-ray image by XMM-Newton at esa.int/ESA_Multimedia/Images/ with explanations in cbat.eps.harvard.edu/iau/cbet/ which also contains more 3I news.
Meanwhile the paper iopscience.iop.org/article/10. claims an upper limit for 3I's nucleus diameter of only some 750 meters from the measured non-gravitational acceleration (NGA) parameters: that would be waaay more stringent than the 5.6 km upper limit from early Hubble observations reported in iopscience.iop.org/article/10. (where also a lower limit of 440 meters is stated).

@leftsidestory@mstdn.social
2025-12-06 00:30:00

Moody Urbanity - Old & New VI 🔆
情绪化城市 - 新与旧 VI 🔆
📷 Zeiss Ikon Super Ikonta 533/16
🎞️ Ilford HP5 Plus 400, expired 1993
#filmphotography #Photography #blackandwhite

Ilford HP5 Plus 400 (6x6) English Alt Text: A black and white image captures the interior of a large building with an arched ceiling and tall windows on the left. The ceiling appears weathered, with visible streaks and patches. On the right wall near the ceiling, large Chinese characters are painted, suggesting cultural or historical significance. The architecture hints at a public space, possibly a train station or hall in a Chinese-speaking region. 中文替代文字： 这是一张黑白照片，展示一座大型建筑的内部，拱形天花板高耸，左侧排列着…
Ilford HP5 Plus 400 (6x6) English Alt Text: A gritty black and white photo shows an urban scene with a brick wall, an industrial-style hanging light, and a metal ceiling structure with beams. A balcony with vertical railings is visible above. On the right side of the wall, Chinese characters read “Non-existent” adding a personal or rebellious tone. The image blends industrial architecture with expressive street art. 中文替代文字： 这是一张黑白照片，画面呈现都市风格：砖墙、工业风吊灯和带有横梁的金属天花板结构。上方可见带有垂直栏杆的阳台。墙右侧写有中文“莫须有”，传达…
Ilford HP5 Plus 400 (6x6) English Alt Text: A black and white photograph features a metal abstract sculpture in the foreground, composed of twisted tubular forms resembling horns or funnels. Behind it stands a tall industrial chimney, rising vertically into a grainy sky. Trees surround the sculpture, adding contrast between nature, art, and industry. The sculpture’s flowing shapes juxtapose the rigid geometry of the chimney, creating a visual tension between creativity and functionality. 中文替代…
Ilford HP5 Plus 400 (6x6) English Alt Text: A black and white photo shows a statue of a person wearing a full-body protective suit with a hood, standing on top of a building by the side of a tall industrial chimney. The perspective is from below, emphasizing the towering height of the chimney. The person’s gear suggests a hazardous or contaminated environment. A metal ladder is attached to the building, reinforcing the industrial setting. The dramatic lighting and monochrome tones evoke a sen…
@arXiv_physicsoptics_bot@mastoxiv.page
2025-10-13 09:12:20

Engineering High-Order Harmonic Generation through Gas Confinement at Sub-Millimeter Lengths
Agata Azzolin, Gaia Giovannetti, Oliviero Cannelli, Sabine Rockenstein, Guangyu Fan, Md S. Ahsan, Lorenzo Colaizzi, Erik P. M{\aa}nsson, Noah Tettenborn, Linda Oberti, Davide Faccial\`a, Fabio Frassetto, Anna Gabriella Ciriolo, Dario W. Lodi, Alia Ashraf, Cristian Manzoni, Rebeca Mart\'inez V\'azquez, Michele Devetta, Roberto Osellame, Luca Poletto, Salvatore Stagira, Caterina Vozzi, Te…

Engineering High-Order Harmonic Generation through Gas Confinement at Sub-Millimeter Lengths
Attosecond light sources based on high-order harmonic generation (HHG) constitute to date the only table-top solution for producing coherent broadband radiation covering the spectral range from the extreme ultraviolet to the soft X-rays. The so-called emission cutoff can be extended towards higher photon energies by increasing the driving wavelength at the expense of conversion efficiency. An alternative route is to overdrive the process by using higher laser intensities, with the challenging r…

@leftsidestory@mstdn.social
2026-01-10 00:30:02

Urban Texture IV 🧩
城市质地 IV 🧩
📷 Zeiss IKON Super Ikonta 533/16
🎞️ Lucky SHD 400
#filmphotography #Photography #blackandwhite

Lucky SHD 400 (6x6) English Alt Text: A dramatic black-and-white photo of tall modern apartment buildings forming a semi-enclosed courtyard. The buildings feature repetitive patterns of windows and balconies, with vertical and horizontal lines creating a geometric rhythm. The central building has a darker facade with a vertical strip of windows, possibly indicating a stairwell. The photo is taken from a low angle, emphasizing the towering height and density of the structures. The monochrome pa…
Lucky SHD 400 (6x6) English Alt Text: A black-and-white street scene featuring a white directional arrow painted on the asphalt, pointing straight ahead. In the center, a small circular traffic island with a flower bed adds a touch of nature. To the right, a cyclist rides past a modern building with large support columns and an overhanging structure. Trees and distant buildings line the background. The composition blends urban architecture with subtle natural elements, evoking a quiet, reflect…
Lucky SHD 400 (6x6) English Alt Text: A narrow alleyway bordered by a concrete wall on one side and dense foliage on the other. In the center, several white bicycles are piled haphazardly, some overturned or leaning against each other. These bikes appear to be part of a shared bike system, identifiable by uniform frames and QR code labels. The scene is cluttered and chaotic, suggesting abandonment or improper parking. The black-and-white tone adds a somber, gritty atmosphere, emphasizing urban…
Lucky SHD 400 (6x6) English Alt Text: A quiet urban street scene in black and white. A row of large, empty concrete planters lines the sidewalk, creating a strong sense of depth and perspective. On the left, a building with multiple windows stretches into the distance, and a lone person walks away from the camera. On the right, evenly spaced trees add contrast to the geometric shapes of the planters. The street is calm, with no visible traffic, and the composition emphasizes symmetry and solit…
@mcdanlj@social.makerforums.info
2025-11-08 03:41:42

Tonight, I'm drilling morse code POTA in Morse Walker with simulated callers at 22–30WPM, and I think for the first time I copied a 2x3 at 30 WPM on the first hearing ("WG0KTQ"), and copied some shorter 30WPM calls on the first hearing in 2-way pileups. Not reliably though, not even reliably without a pile-up!
Tomorrow afternoon, I expect to be in park US-6888, calling CQ at around 15WPM, aft…

Parks on the Air | POTA | Parks program for amateur radio.
Parks program for amateur radio, also known as Parks on the Air (POTA), including a map and list of entities for the program.

@cellfourteen@social.petertoushkov.eu
2025-12-07 20:27:04

This kind of circular causality is exactly the reason why I don't have even a burner account on X. As a social website, it went belly up more times than his owner's talk of colonizing anything in space.
X axes European Commission’s ad account after €120M EU fine – POLITICO

X axes European Commission’s ad account after €120M EU fine
Nikita Bier, X’s head of product, accused the EU executive of trying to amplify its own social media post about the fine on X by trying “to take advantage of an exploit in our Ad Composer.”

@fanf@mendeddrum.org
2026-01-02 12:42:03

from my link log —
Eliminate branches by melding IR instructions.
arxiv.org/abs/2512.22390
saved 2026-01-01 dotat.at/:/J3PP5.html

Eliminate Branches by Melding IR Instructions
Branch mispredictions cause catastrophic performance penalties in modern processors, leading to performance loss. While hardware predictors and profile-guided techniques exist, data-dependent branches with irregular patterns remain challenging. Traditional if-conversion eliminates branches via software predication but faces limitations on architectures like x86. It often fails on paths containing memory instructions or incurs excessive instruction overhead by fully speculating large branch bodi…

@Techmeme@techhub.social
2025-11-30 18:30:32

An in-depth look at TPUv7 Ironwood, the latest generation of Google's TPU, and how it positions Google as a serious challenger to Nvidia's AI chip dominance (Dylan Patel/SemiAnalysis)
newsletter.semianalysis.com/p/

Google TPUv7: The 900lb Gorilla In the Room
Anthropic’s 1GW+ TPUs, New customers Meta/SSI/xAI/OAI, Full Stack Review of v7 Ironwood, CUDA Moat at risk, Next Generation TPUv8AX and TPUv8X versus Vera Rubin

@leftsidestory@mstdn.social
2025-10-17 02:24:17

Moody Urbanity - Odes 🎶
情绪化城市 - 颂 🎶
📷 Zeiss Super Ikonta 533/16
🎞️ Ilford HP5 Plus, expired 1993
#filmphotography #Photography #blackandwhite

Ilford HP5 Plus 400 (6x6) English Alt Text: A black and white photo captures a city street running beneath a low overpass with a clearance sign reading “2.5m.” Two people ride bicycles or electric scooters—one holds an umbrella while moving. A car travels alongside them. The overpass has a stone wall and metal railings. In the distance, tall buildings and construction cranes suggest ongoing urban development. The monochrome tone adds a timeless, documentary feel. The scene reflects everyday ci…
Ilford HP5 Plus 400 (6x6) English Alt Text: A contemplative black and white image shows a person standing at a crosswalk beneath an overpass. The person faces away from the camera, hands clasped behind their back, wearing a jacket. Shadows from the bridge create dramatic contrast on the pavement. In the background, several pedestrians and cars move through the urban setting. The photo evokes solitude and reflection, with strong light and shadow interplay. 中文替代文字： 这张黑白照片展现了一位行人站在高架桥下的斑马线上，背对镜头…
Ilford HP5 Plus 400 (6x6) English Alt Text: A black and white photo of a modern building interior with a high, angled glass ceiling supported by geometric beams. Natural light floods the space. On a mezzanine level, people sit at round tables, possibly in a café or lounge. The word “PURE” is visible on the right wall. Through the large windows, tall buildings suggest an urban setting. The architectural design and relaxed atmosphere contrast with the city outside. 中文替代文字： 这张黑白照片展示了一座现代建筑的内部，高耸…
Ilford HP5 Plus 400 (6x6) English Alt Text: A black and white photo of a quiet bus stop beside a multi-lane road. The bus stop sign features Chinese characters and an information board mounted on a tall pole. A white metal fence lines the road, with trees and a wall in the background. No vehicles or people are visible. Sunlight casts shadows on the sidewalk, adding depth. The grainy texture and monochrome palette give the image a nostalgic, historical feel. 中文替代文字： 这是一张黑白照片，描绘了一个安静的公交车站，位于多车道…