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@leftsidestory@mstdn.social
2026-05-20 02:36:48

Urban Fallacies ❌
城市谬误 ❌
📷 Pentax 6x7
🎞️ Ilford HP5 Plus 400 (6x7)
If you like my work, Support by buying me a coffee or a roll of film from PayPal paypal.com/paypalme/ydcdingsite

Ilford HP5 Plus 400 (6x7) English A black-and-white photograph of a church facade with classical architecture. The building features a central entrance with a triangular pediment, columns, and statues of religious figures. Above the entrance, there is a cross at the top. The church is flanked by tall, modern high-rise buildings. A flagpole with a flag is visible on the right side. 中文 一张黑白照片，展示了一座具有古典建筑风格的教堂正面。建筑物中间有一个三角形山墙的入口，两侧有柱子和宗教人物的雕像。入口上方顶部有一个十字架。教堂两侧是高大的现代高层建筑。右侧可以看到一根旗杆和一面旗帜。
Ilford HP5 Plus 400 (6x7) English A black-and-white photograph of a cylindrical building with a domed roof. The structure features classical architectural elements, including columns and statues of angels. The building is partially obscured by bare tree branches in the foreground. The sky is clear, and the image captures the contrast between the classical and modern elements in the background. 中文 一张黑白照片，展示了一座带有圆顶屋顶的圆柱形建筑。建筑物具有古典建筑元素，包括柱子和天使雕像。建筑物部分被前景中光秃秃的树枝遮挡。天空晴朗，图像捕捉了古典与现代元素之间的对比。
Ilford HP5 Plus 400 (6x7) English A black-and-white photograph of a bustling street. The scene includes several food stalls with tables, chairs, and cooking equipment. A man is seated at a table on the right, while other people are walking or standing in the background. Bare trees line the street, and buildings with balconies and signs in Chinese characters are visible. 中文 一张黑白照片，展示了一个热闹的街头。场景中有几个食品摊位，摆放着桌子、椅子和烹饪设备。右侧有一名男子坐在桌子旁，其他人在背景中行走或站立。光秃秃的树木排列在街道两侧，可以看到带有阳台和中文字标志的建筑。
Ilford HP5 Plus 400 (6x7) English A black-and-white photograph showing a chef in a white hat and apron, visible through a rectangular window. The chef appears to be working in a kitchen. Above the window, a hanging light fixture with a cylindrical shade is mounted on the wall. The window reflects some indoor elements, including a sign with Chinese characters. 中文 一张黑白照片，通过一个矩形窗户可以看到一位戴白色厨师帽和围裙的厨师。厨师看起来正在厨房工作。窗户上方的墙上悬挂着一个带圆柱形灯罩的灯具。窗户反射出一些室内元素，包括一个写有中文字的标志。
@leftsidestory@mstdn.social
2026-05-21 00:30:06

Urban Ridicules ❌
都市的愚弄 ❌
📷 Pentax 6x7
🎞️ Ilford HP5 Plus 400 (6x7)
If you like my work, Support by buying me a coffee or a roll of film from PayPal paypal.com/paypalme/ydcdingsite

Ilford HP5 Plus 400 (6x7) ##English Black and white photograph of a church facade. The building features a central tower with a cross at the top. A statue of a robed figure stands in a niche above the main entrance. Flanking the entrance are two statues on pedestals. Above the entrance, Chinese characters are visible. Two clocks are embedded in the facade on either side of the entrance. A Chinese flag flying on a flagpole to the front of the building. ##中文 黑白照片，展示一座教堂的正立面。建筑中央有一座塔楼，顶部立有十字架。主入口…
Ilford HP5 Plus 400 (6x7) ##English Black and white photograph of an urban scene. A tall, cylindrical smokestack rises above a cluster of low-rise buildings with bare trees in the foreground. Overhead, a network of power lines crisscrosses the sky. In the background, a tall modern skyscraper is partially visible through the haze. ##中文 黑白照片，展示城市景观。一根高大的圆柱形烟囱耸立在一群低层建筑之上，前景是光秃秃的树木。上方是交错的电线网络。背景中，一座高大的现代摩天大楼在雾霭中若隐若现。
Ilford HP5 Plus 400 (6x7) ##English Black and white photograph of an object viewed from below. The object has a textured surface and consists of multiple steps leading upwards. The steps are framed by a window on both sides. The perspective emphasizes the height and angle of the object. ##中文 黑白照片，从下方拍摄的物体。物体表面有纹理，由多个台阶向上延伸。物体透过窗框构图。透视角度强调了楼梯的高度和倾斜度。
Ilford HP5 Plus 400 (6x7) ##English Black and white photograph of a traditional Chinese tiled roof. The roof features intricate, layered tiles with small figurines lined up along the ridges. The angle of the shot captures the curve and detail of the roof's edge, with a portion of the sky visible in the background. ##中文 黑白照片，展示传统中式瓦顶。屋顶由层叠的瓦片构成，屋脊上排列着小型人形装饰。拍摄角度展现了屋顶边缘的曲线和细节，背景中可见部分天空。
@hikingdude@mastodon.social
2026-07-20 17:50:12

#mountainMonday ! Unfortunately not a recent photo but one that's quite a while ago. Before my wife had 2 knee issues. But maybe we can go there again soon.
As you can see, the landscape there is A BLAST! I totally love the area
#mountains

This image captures a breathtaking and rugged mountain landscape, evoking a sense of adventure and natural grandeur. A narrow, winding dirt trail cuts through the scene, leading the viewer's eye deeper into the majestic valley. The trail is flanked by rocky outcrops and patches of green vegetation, adding texture and contrast to the rugged terrain. To the right of the trail, a steep, rocky cliff rises dramatically, its gray and brown hues showcasing the raw beauty of the mountain. The cliff's r…
@penguin42@mastodon.org.uk
2026-06-21 14:20:26

Pleasantly surprised I can measure this timing difference on my cheap scope; In both cases this is a chain of a pair of inverters in a 74LS04 package; the difference between the two captures is just the length of breadboard wire between the 1st and 2nd inverter; the first is about 1cm and the 2nd is about 20cm; so that's about 0.5ns difference measured which is reasonable - and surprisingly good for a 500MS/s scope.
(The yellow is input from a sig gen, blue is op of 2nd inverter).

An oscilloscope showing two falling edge waveforms. The blue one is delayed by a few ns relative to the yellow. There's some nasty ringing.
Like the other one with some different timings
@leftsidestory@mstdn.social
2026-07-14 01:36:54

Inside Outside V 🔲
中间 V 🔲
📷 Pentax MX
🎞️ Fujifilm Neopan F, expired 1993
If you like my work, Support by buying me a coffee or a roll of film from
PayPal paypal.com/paypalme/ydcdingsite
Wise

Fujifilm NEOPAN F (FF) English A black-and-white photograph showing a person sitting alone on a glass-railed balcony or terrace. The individual is positioned on the left side, facing slightly to the right, and appears to be looking down or at something in their hands. In the background, a tall, modern building with a grid-like facade is visible under a bright, overcast sky. 中文 一张黑白照片，展示了一个独自坐在玻璃栏杆阳台或露台上的人。该人物位于左侧，略微向右转身，似乎在低头或查看手中的物品。背景中，一幢带有网格状立面的现代高层建筑在明亮的阴天下清晰可见。
Fujifilm NEOPAN F (FF) English A black-and-white photograph featuring a religious statue of a robed figure holding a cane. The statue stands on a pedestal, with a flagpole to its right flying a flag. In the background, there are tall buildings, including one with a grid-like facade, and trees framing the scene. 中文 一张黑白照片，展示了一尊手持木杖身着长袍的宗教人物雕像。雕像立在基座上，右侧有一根旗杆，悬挂着一面旗帜。背景中有高层建筑，其中一幢建筑带有网格状立面，还有树木点缀着场景。
Fujifilm NEOPAN F (FF) English A black-and-white photograph capturing a traditional Chinese temple roof with intricate carvings and statues of figures lined up along the ridge. In the background, modern high-rise buildings are visible, and a flag with a star design is flying on a flagpole to the right of the temple roof. 中文 一张黑白照片，拍摄了一个传统中国寺庙的屋顶，屋脊上排列着精美雕刻和多尊人物雕像。背景中可见现代高层建筑，寺庙屋顶右侧的旗杆上悬挂着一面带有星形图案的旗帜。
Fujifilm NEOPAN F (FF) English A black-and-white photograph showing a network of overhead power lines or cables against a cloudy sky. Below the lines, the tops of several tall, modern buildings are visible, creating a contrast between the industrial elements and the urban architecture. 中文 一张黑白照片，展示了在多云天空下的架空电线或电缆网络。电线下方可见多幢现代高层建筑的顶部，形成工业元素与城市建筑之间的对比。
@arXiv_physicsfludyn_bot@mastoxiv.page
2026-05-19 08:13:44

Solutocapillary instability in slipping falling films
Sanghasri Mukhopadhyay, S\'everine Millet, Bastien Di Pierro, Asim Mukhopadhyay
arxiv.org/abs/2605.17519 arxiv.org/pdf/2605.17519 arxiv.org/html/2605.17519
arXiv:2605.17519v1 Announce Type: new
Abstract: We present a comprehensive framework for gravity-driven, surfactant-laden thin films flowing over slippery substrates, elucidating how wall slip modifies the coupled hydrodynamics and interfacial transport. A long-wave model is formulated with a conservative bulk-surface mass balance and a Navier slip condition. The Orr-Sommerfeld eigenvalue problem governs the linear regime, while a weighted-residual model captures the nonlinear evolution over a range of equilibrium surfactant coverages, Marangoni strengths, and adsorption kinetics. The analysis predicts a non-monotonic variation of the critical Reynolds number with equilibrium coverage, exhibiting a maximum at intermediate $\Gamma_e$, and a slip-induced transition from single- to double-hump solitary structures with increasing Marangoni number, accompanied by attenuated capillary ripples. Under fast adsorption kinetics, the surface field homogenizes, preserving the mean film shape and flux while flattening both the surface concentration $\Gamma$ and the bulk inventory $\chi h\phi$. A spurious interfacial mass growth reported by Pascal et al.(PRF, 2019) and D'Alessio et al.(JFM, 2020) is resolved through a revised surface balance ensuring strict conservation. Wall slip thus emerges as a key control parameter, reducing viscous resistance and mitigating Marangoni back-stress. The slip parameter $\beta$ is a useful control knob for surfactant-laden films. Slip prevents fragile multi-hump bound states, promoting a single broad crest or an almost flat, uniform sheet by carefully bonding $\beta$ to wave selection, ripple damping, and the bulk-surface surfactant balance.
toXiv_bot_toot

@leftsidestory@mstdn.social
2026-07-11 02:05:13

Inside Outside II 🔲
中间 II 🔲
📷 Pentax MX
🎞️ Fujifilm Neopan F, expired 1993
If you like my work, Support by buying me a coffee or a roll of film from
PayPal paypal.com/paypalme/ydcdingsite
Wise

Fujifilm NEOPAN F (FF) English A black-and-white close-up of a vase with tall, dried flower stems placed near a window. The vase is partially visible, with a checkered pattern, and the stems are frosted, likely from cold weather. The window reflects faint outdoor scenery. 中文 一张黑白特写照片，展示了一个花瓶，里面插着几根高大的干花茎，放在窗户旁。花瓶部分可见，带有格子图案，花茎上覆盖着霜，可能是由于寒冷天气。窗户上反射出模糊的室外景色。
Fujifilm NEOPAN F (FF) English A black-and-white photograph capturing a tall, ornate stone structure partially obscured by dense tree foliage. The structure features intricate carvings and architectural details, with two small animal sculptures perched on its upper ledge. The trees dominate the upper portion of the image, their branches and leaves creating a natural canopy against a bright sky. 中文 一张黑白照片，拍摄了一座高大的石结构建筑，部分被茂密的树叶遮挡。建筑上有精美的雕刻和建筑细节，上部的台面上有两尊小型动物雕塑。树木占据了图片的上部，枝叶形成了天然的华盖，映衬着明亮的天空。
Fujifilm NEOPAN F (FF) English A black-and-white photograph of the upper section of a traditional Chinese architectural structure. The image focuses on a curved, decorative roof with a central carved emblem featuring the Chinese character surrounded by intricate patterns. The roof is made of gray bricks, and a tree is partially visible on the right side. 中文 一张黑白照片，拍摄的是中国传统建筑的上部。图片聚焦于一个弯曲的装饰性屋顶，中央有一个雕刻图案，周围环绕着精美的花纹。屋顶由灰色砖块构成，右侧可见部分树木。
Fujifilm NEOPAN F (FF) English A black-and-white photograph of a pedestrian pathway lined with trees and people. The path is paved with light-colored tiles, and tall trees flank both sides. In the background, a high-rise building with numerous windows and balconies rises above the treetops. People are seen walking and sitting on benches along the path. 中文 一张黑白照片，展示了一条人行道，两侧种满树木，行人来往其中。小径铺有浅色瓷砖，高大的树木分列两侧。背景中，一栋高层建筑耸立于树梢之上，建筑上有许多窗户和阳台。人们在小径上行走或坐在长椅上。
@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
2026-06-29 00:30:04

The Aspiration of History 🌠
历史的热望 🌠
📷 Pentax 6x7
🎞️ Ilford FP4 Plus 125 (6x7)
If you like my work, Support by buying me a coffee or a roll of film from
PayPal paypal.com/paypalme/ydcdingsite
Wise

Ilford FP4 Plus 125 (6x7) English Black-and-white photograph of a traditional Chinese pavilion with a multi-tiered, curved roof, partially obscured by blooming trees. The pavilion is nestled among dense foliage, with blossoms in the foreground creating a framed view. The sky is clear, and the structure’s intricate roof details are visible, showcasing classic architectural elements. 中文 黑白照片，展示了一座传统中式亭台，亭顶为多层弯曲的屋顶，部分被开花的树木遮挡。亭台坐落在茂密的树木中，前景的花朵形成了一个框景。天空晴朗，亭台的屋顶细节清晰可见，展现了经典的建筑元素。
Ilford FP4 Plus 125 (6x7) English Black-and-white close-up photograph of a stone surface featuring Chinese calligraphy and a carved dragon relief. The left side of the image displays vertical columns of traditional Chinese characters, while the right side showcases a detailed dragon carving, with intricate scales and flowing lines. The stone appears weathered, emphasizing the historical and artistic value of the carving. 中文 黑白特写照片，展示了一个石质表面，上面有中文书法和浮雕龙。照片左侧是竖排的传统汉字，右侧是精美的龙雕，龙鳞和流动的线条清晰可见。石头看起来经…
Ilford FP4 Plus 125 (6x7) English Black-and-white photograph of a traditional building with a tiled roof and wooden windows. The structure is partially covered in climbing vines, adding texture to the brick walls. The roof tiles are curved, and the windows have wooden frames with horizontal slats. The image captures the architectural details and the natural integration of the vines with the building. 中文 黑白照片，展示了一座传统建筑，屋顶铺有瓦片，窗户为木质。建筑物部分被爬山虎覆盖，为砖墙增加了质感。屋顶的瓦片呈弯曲状，窗户有木质框架和水平百叶窗。照片捕捉了建筑的细节以及爬山虎与建筑…
Ilford FP4 Plus 125 (6x7) English Black-and-white photograph of a park scene. Two individuals stand near a large, textured tree trunk with visible grooves and protruding roots at its base. One person, wearing a dark jacket and light pants, climbs the roots, while the other, in a light jacket and dark pants, stands beside the tree. The background features a grassy area, scattered trees, and a few distant people, including one seated on a bench. The scene is serene, with a dirt path visible to t…
@leftsidestory@mstdn.social
2026-05-28 01:27:13

A Not So Brave New World III 🌐
不太美丽的新世界 III 🌐
📷 Nikon F4E
🎞️ Lucky SHD 400 (FF）
If you like my work, Support by buying me a coffee or a roll of film from
PayPal paypal.com/paypalme/ydcdingsite
Wise

Lucky LUCKY SHD 400 (FF) ##English A black-and-white photograph of a tall, modern apartment building with numerous windows and balconies. A person wearing a hat and carrying a bag is walking down a set of wide, concrete stairs in the foreground. The stairs are flanked by metal railings. The building has visible air conditioning units attached to its exterior. The image captures the urban environment and the contrast between the person and the towering structure. ##中文 一张黑白照片，展示了一幢高大的现代公寓楼，楼体有众多…
Lucky LUCKY SHD 400 (FF) ##English A black-and-white close-up photograph of a decorative window or screen with a geometric pattern. The design consists of overlapping circular and petal-like shapes, creating a symmetrical and intricate lattice. The background is blurred, focusing attention on the detailed craftsmanship of the pattern. ##中文 一张黑白特写照片，展示了一个装饰性窗户或屏风，其上有几何图案。设计由重叠的圆形和花瓣状图形组成，形成对称且复杂的花格。背景模糊，突出了图案精细的工艺细节。
Lucky LUCKY SHD 400 (FF) ##English A black-and-white photograph of the corner of a traditional Chinese building. The roof features intricate carvings and ornamental details, including a circular medallion with floral designs. A tree branch with small buds extends into the frame from the top right, contrasting with the architectural elements. The sky is visible in the background, adding depth to the image. ##中文 一张黑白照片，展示了中国传统建筑的一个角落。屋顶装饰有精美的雕刻和装饰性细节，包括一个带有花卉图案的圆形饰章。右上角伸入画面的是一根长有小花苞的树枝，与建筑元素形成对比…
Lucky LUCKY SHD 400 (FF) ##English A black-and-white photograph showing the upper section of a traditional Chinese building with a tiled roof. The roof features ornate, pointed eaves and a row of small figurines lining the ridge. The sky above is bright, with visible light streaks, possibly from the sun or lens flare. The image captures the architectural details of the roof and the contrast between the dark roof and the bright sky. ##中文 一张黑白照片，展示了中国传统建筑的上部，屋顶为瓦片结构。屋顶的檐角装饰精美，屋脊上排列着一系列小雕像。上方的天空明…