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@cdarwin@c.im
2026-06-19 18:21:16

This is the most detailed picture of a human cell ever made 🧪
instagram.com/reel/DX1CGIZMKJs

Sam Bousaba on Instagram: "This is a single human cell. The white filament-like structures are microtubules, and the small colored particles are ribosomes. Your body contains on the order of ~37 trillion cells. Each cell functions like a highly organized, self-regulating factory operating continuously. There is no central “supervisor”—yet thousands of processes run in parallel with remarkable coordination. Every ribosome is constantly building proteins by linking amino acids together. In eukaryotic (human) cells, a ribosome typically adds about 5–10 amino acids per second (not ~20). Since a single cell can contain millions of ribosomes, protein production is massive—resulting in millions to tens of millions of peptide bonds formed per second per cell. The microtubules act as an internal transport network. Motor proteins such as kinesin move along these tracks, carrying cellular cargo. They “walk” step by step using ATP, at speeds of roughly 500–1000 nanometers per second. Each cell contains a dense network of these filaments, with many motor proteins moving simultaneously. Just beneath the cell membrane lies the actin cortex, a dynamic meshwork that helps maintain cell shape and resist mechanical stress. This structure is continuously remodeled—assembled and disassembled—allowing the cell to adapt to its environment. Now scale this up. Across ~37 trillion cells, each containing millions of ribosomes and hundreds to thousands of mitochondria, your body is constantly producing energy in the form of ATP. Total ATP turnover is enormous—roughly equivalent to your body weight in ATP recycled every day. The DNA in a single human cell, if stretched out, measures about 2 meters. Across all your cells, this would span distances comparable to traveling from Earth to the Sun and back many times (the exact multiple depends on assumptions about cell count and DNA packing). None of these processes are under conscious control. They began when you were a single cell and have continued uninterrupted ever since."
62K likes, 2,387 comments - scienceoftheuniverse on May 2, 2026: "This is a single human cell. The white filament-like structures are microtubules, and the small colored particles are ribosomes. Your body contains on the order of ~37 trillion cells. Each cell functions like a highly organized, self-regulating factory operating continuously. There is no central “supervisor”—yet thousands of processes run in parallel with remarkable coordination. Every ribosome is constantly building prot…

@tiotasram@kolektiva.social
2026-07-12 16:28:07

Since it was relevant to a discussion I just had on here and is something most people probably haven't thought about much (unless you've taken one of a handful of philosophy classes), I thought I'd try to lay out a key piece of Descartes' Meditations (#philosophy

@leftsidestory@mstdn.social
2026-06-15 00:30:48

Perfection Because It Doesn’t Exist 🎐
完美因为完美不存在 🎐
📷 Nikon F4E
🎞️ Kentmere 400
If you like my work, Support by buying me a coffee or a roll of film from
PayPal paypal.com/paypalme/ydcdingsite
Wise

Kentmere PAN 400 (FF) Image 4 English Black-and-white photograph of a traditional Chinese temple roof with a dragon-like creature sculpture at the end of the upturned eave. The creature has a detailed, expressive face and a curved body, adding a dynamic element to the roof's design. The roof tiles are layered and the background is a clear sky. 中文 黑白照片，拍摄的是传统中式寺庙的屋顶，上翘的屋檐末端有一尊龙形生物雕塑。该生物面部表情生动，身体弯曲，为屋顶设计增添了动感元素。屋顶瓦片层叠排列，背景是明净的天空。
Kentmere PAN 400 (FF) English Black-and-white photograph of a traditional Chinese temple with intricate roof eaves. In the foreground, there is a stone statue of a muscular, fierce-looking guardian figure with a detailed headdress, armored chest, and a clenched fist raised. The background features a multi-tiered temple building with ornate wooden carvings and layered, upturned roof corners. 中文 黑白照片，拍摄的是一座传统中式寺庙，屋檐装饰精美。前景是一尊石雕守护神像，肌肉发达，面容凶猛，头戴精美头饰，身穿铠甲，一只拳头高高举起。背景是一座多层寺庙建筑，木雕精美，屋檐层叠上翘。
Kentmere PAN 400 (FF) English Black-and-white close-up of a traditional Chinese temple roof. The image captures the intricate details of the upturned eaves, which are adorned with small, evenly spaced figurines. The roof tiles are layered, and the wooden structure beneath is visible, showcasing the craftsmanship of the architecture. 中文 黑白特写，拍摄的是传统中式寺庙的屋顶。画面展现了上翘屋檐的精美细节，屋檐上均匀分布着小型雕塑。屋顶瓦片层叠排列，下方的木质结构清晰可见，展现了建筑工艺的精湛。
Kentmere PAN 400 (FF) English Black-and-white close-up of a traditional Chinese temple roof corner. The image highlights the detailed carvings of mythical creatures and ornamental figures along the eaves. The roof tiles are arranged in a curved, layered pattern, emphasizing the architectural elegance. 中文 黑白特写，拍摄的是传统中式寺庙的屋顶角落。画面突出了屋檐上神话生物和装饰性雕塑的精美细节。屋顶瓦片呈弯曲的层叠排列，强调了建筑的优雅之美。
@cheryanne@aus.social
2026-07-16 12:16:49

Two Brunettes & A Gay
Indulge in an hour of witty banter and lively discussions with these cheeky 30-somethings, along with special guests from the entertainment industry and beyond...
Great Australian Pods Podcast Directory: greataustralianpods.com/two-br

Two Brunettes & A Gay Screenshot of the podcast listing on the Great Australian Pods website
@totientfunction@mathstodon.xyz
2026-05-14 21:55:16

A physical tool bar 😉
From the 2024 XOXO talk by @… about the artist Wes Cook.
xoxofest.com/2024/videos/cabel

A photograph of the artist Floyd Wesley "Wes" Cook from behind at his drawing table. Wes has greying hair, black thick glasses and a plain blue shirt. His face can only be seen from the side and he looks focused on his work, drawing with a pencil. It's an extremely detailed scene of a big hall with various side rooms with unique designs and objects and different people standing and walking around. In the very middle is a star-shaped object. Above the drawing table is a wooden bar with hooks whe…
@arXiv_csIT_bot@mastoxiv.page
2026-06-11 07:36:47

An Information-Theoretic Analysis of Threshold Group Testing
Remco van der Hofstad, Noela M\"uller, Connor Riddlesden
arxiv.org/abs/2606.11353 arxiv.org/pdf/2606.11353 arxiv.org/html/2606.11353
arXiv:2606.11353v1 Announce Type: new
Abstract: We study the Threshold Group Testing (TGT) problem in the noiseless and non-adaptive setting, where the objective is to exactly recover a sparse binary vector from pooled tests, using as few tests as possible. In TGT, each test applied to a subset of items returns a positive outcome if the number of 1's (defective items) in that subset meets or exceeds a specified threshold, and has a negative outcome otherwise. We investigate how the complexity of TGT compares to that of Classical Group Testing (CGT), corresponding to the special case of the threshold equal to one, and analyse the impact of increasing the threshold on the required number of tests.
Our main contribution is the derivation of a sharp information-theoretic phase transition at $c_{\mathrm{inf}}^{\mathrm{TGT}}k\log(n/k)$ (non-adaptive) tests for TGT within the constant-column test design. The threshold constant $c_{\mathrm{inf}}^{\mathrm{TGT}}$ is expressed as a function of the prevalence of defectives and the threshold value. Our upper bound is derived under an analytic assumption, and we verify that this assumption is satisfied for a threshold value of 2.
The value of $c_{\mathrm{inf}}^{\mathrm{TGT}}$ reveals that TGT on the constant-column design has the same information-theoretic behaviour as CGT in the low-prevalence regime. Yet, strikingly, at higher prevalences, the threshold leads to a significant reduction in the number of tests.
On the other hand, we provide evidence that when the asymptotic proportion of defective items is positive, TGT actually becomes strictly harder than CGT (excluding trivial reductions).
toXiv_bot_toot

@fanf@mendeddrum.org
2026-05-09 11:42:04

from my link log —
The design and implementation of the Berkeley Internet Name Domain (BIND) servers.
www2.eecs.berkeley.edu/Pubs/Te
saved 2020-08-27

@Dragofix@veganism.social
2026-05-11 04:43:38

Facebook is a hub for illegal wildlife trade, and that’s by design, report says news.mongabay.com/2026/05/face

Facebook is a hub for illegal wildlife trade, and that’s by design, report says
With just the click of a button or a swipe on a phone, it’s possible to buy almost anything online, including rare or endangered animals. From quirky shark trophies to exotic live birds, contraband rhino horns or ivory, buyers can flock to e-commerce platforms and find them all. Traffickers hide behind their screens while profiting […]

@leftsidestory@mstdn.social
2026-06-07 00:30:02

Same Place 🐲
同一個地方 🐲
📷 Nikon F4E
🎞️ Kentmere 400
If you like my work, Support by buying me a coffee or a roll of film from
PayPal paypal.com/paypalme/ydcdingsite
Wise

Kentmere PAN 400 (FF) ##English Black-and-white photograph of a traditional Chinese temple entrance. The scene features a large, ornate building with a multi-tiered, curved roof adorned with intricate eaves. The structure is supported by tall, carved stone pillars. In front of the temple, a group of people stands and walks on a wide, stone-paved pathway. The pathway is flanked by low, decorative stone railings. Tall trees with bare branches frame the top of the image, adding depth and contrast…
Kentmere PAN 400 (FF) ##English Black-and-white close-up of the roof of a traditional Chinese building. The roof is highly detailed, with multiple layers of curved tiles and ornate carvings. At the peak, there is a decorative ridge with intricate designs, including a small pavilion-like structure. The eaves are adorned with elaborate patterns, and a vertical plaque with Chinese characters is visible in the center. ##中文 黑白照片，特写镜头拍摄的是一座传统中国建筑的屋顶。屋顶装饰精美，有多层弯曲的瓦片和精美的雕刻。屋脊处有一个装饰性的脊饰，包含一个小亭子状的结构。屋檐饰…
Kentmere PAN 400 (FF) ##English Black-and-white photograph of a carved stone pillar in front of a traditional Chinese building. The pillar is wrapped by a detailed stone sculpture of a dragon, its body coiled around the column. The dragon's head is positioned at the top, facing outward. The building behind the pillar has a wooden structure with visible beams and a tiled roof. A person stands partially visible in the background. ##中文 黑白照片，拍摄的是一根位于传统中国建筑前的雕刻石柱。石柱上缠绕着一个详细的石龙雕塑，龙身环绕在柱子上，龙头位于顶部，面向外…
Kentmere PAN 400 (FF) ##English Black-and-white photograph of a traditional Chinese building with a tiled roof. A large, leafless tree with twisted branches dominates the foreground, partially obscuring the roof. The roof features layered, curved tiles typical of classical Chinese architecture. The image captures the contrast between the organic shapes of the tree and the structured lines of the building. ##中文 黑白照片，拍摄的是一座传统中国建筑的瓦屋顶。前景是一棵枝干扭曲的大树，树叶已落，部分遮挡了屋顶。屋顶采用典型的中国古典建筑层叠弯曲的瓦片。照片展现了树木有机形态与建筑结…
@leftsidestory@mstdn.social
2026-05-10 00:30:00

City Silhouettes V🏙️
城市轮廓线 V 🏙️
📷 Pentax 6x7
🎞️ Kentmere 400 (6x7)
If you like my work, Support by buying me a coffee or a roll of film from PayPal paypal.com/paypalme/ydcdingsite

Kentmere PAN 400 (6x7) ##English Black and white photograph of an urban scene featuring a concrete overpass with a metal railing on top. Below the overpass, a white Honda SUV with the license plate "京HD819" is driving on the road. A motorcyclist is visible in the foreground. The overpass is supported by large concrete pillars, and utility poles with streetlights and electrical wires are present. In the background, there is a fence with barbed wire and a partially visible elevated structure. Ev…
Kentmere PAN 400 (6x7) ##English Black and white photograph of a serene park scene. A traditional Chinese pavilion with a tiled roof is situated on a small hill, surrounded by bare trees. A stone staircase with brick steps leads up to the pavilion. The ground is covered with dry grass and scattered rocks, creating a natural and peaceful atmosphere. ##中文 黑白宁静公园景观照片。一座传统中式凉亭位于一个小山丘上，周围环绕着光秃秃的树木。一段石阶砖步道通向凉亭。地面覆盖着干草和零散的岩石，营造出自然宁静的氛围。
Kentmere PAN 400 (6x7) Black and white photograph of a modern urban area. The foreground features a large, intricate white metal structure with geometric patterns. Behind it, tall buildings with numerous windows are visible. Bare trees with thin branches are scattered throughout the scene, adding a natural element to the otherwise architectural focus. ##中文 黑白现代城市景观照片。前景是一个大型、复杂的白色金属结构，具有几何图案。其后是多个高层建筑，建筑上有众多窗户。画面中还零星分布着光秃秃的树木，细细的树枝为以建筑为主的景观增添了一丝自然元素。
Kentmere PAN 400 (6x7) white close-up photograph of a modern white metal structure with intricate, intertwining patterns. The structure appears to be part of a larger architectural installation. In the background, bare trees with thin branches are visible against a bright sky, providing a natural contrast to the man-made design. ##中文 黑白特写照片，展示了一个现代白色金属结构，其设计精巧，图案交错缠绕。该结构似乎是某个大型建筑装置的一部分。背景中，光秃秃的树木与明亮的天空形成对比，为人工设计增添了自然元素。