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a1rb4Ck

10 karma · joined December 8, 2016

meet.hn/city/45.8992348,6.1288847/Annecy

Socials: - bsky.app/profile/a1rb4ck - github.com/a1rb4ck - x.com/a1rb4ck

Interests: AI/ML, AR/VR, Research, Robotics

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submissionscomments
a1rb4Ck··on Turgot Map of Paris
Medieval maps of Paris were oriented West-East, thus offering the best views of church facades! Note that this is a personal opinion shared as a child with my grandfather after years of family diner in front of his Truschet map.

For sure, there is no connection with "rive-gauche" / "rive-droite", this expression is based on the flow of the Seine, here it would have been the opposite of the map.

Medieval West-East maps on wiki (West on the top, North to the left): - 1530 Braun and Hogenberg engraved map [1] - 1550 Truschet and Hoyau engraved map [2] - 1615 Merian map [3] - also the 1370 Gough Map of Britain [4]

[1] https://fr.wikipedia.org/wiki/Plan_de_Braun_et_Hogenberg [2] https://fr.wikipedia.org/wiki/Plan_de_Truschet_et_Hoyau [3] https://en.wikipedia.org/wiki/Merian_map_of_Paris [4] https://en.wikipedia.org/wiki/Gough_Map

a1rb4Ck··on Launch HN: Bucket Robotics (YC S24) – Defect detection for molded and cast parts
for forged parts, magnetic particle deposit might enhance defect under UV light. Here [0] is a crankshaft inspection method that mixed UV light with SSD detection. [0] https://doi.org/10.1007/s00170-020-06467-4
a1rb4Ck··on Launch HN: Bucket Robotics (YC S24) – Defect detection for molded and cast parts
Very cool. Good luck! I used to work on this. Your synthetic dataset pipeline is really neat. A foundation model of molding defects might be feasible. I hope you will also work on the whole inline quality control problem. From what I saw of the field, sometimes you only get the final quality days after painting, finishing or cool down of big parts. And the quality metric is notably undefined for visual defect, using the cad render as a reference is a good solution. Because plastic is so cheap and the process so stable, I have seen days of production shredded for a tiny perfectly repeated visual defects. Injection molding machines are heavily instrumented [0] and I tried to mix in-mold sensors + process parameters + photo + thermography of hot parts [1] (sry it's in french, might find better doc later). [0] https://scholar.google.com/citations?view_op=view_citation&h... [1] https://a1rb4ck.github.io/phd/#[128,%22XYZ%22,85.039,614.438...
a1rb4Ck··on The Sphere
Actually, the french Panrama [1] invented by Philippe Jaulmes (1958) totally inspired the Imax Dome, after a demo the Expo'67 in Montreal [2]. The Panrama story is long, documents only in french, and I'm still learning bits. For la Géode, the Panrama team tried hard to make a deal to use their french-made tech, so they would have installed 4 smaller omni screens next to the big Imax dome. This was scrapped from the beginning, as la Géode was built on the Omnimax spec from the ground-up. The panrama team still managed to operate a 18m screen in Paris Montparnasse [3] (Espace Gaîté / now Théatre Rive Gauche), and there is one screen left fully equipped in Montpelier, but closed [4]. The Panrama tech was originally 16mm wide, then 35mm, and finally horizontal VistaVision 35mm.

[1] https://fr.m.wikipedia.org/wiki/Panrama [2] https://vimeo.com/199136507 [3] https://www.panrama.net/pages/histoire.html [4] https://www.dailymotion.com/video/x4htqhr

a1rb4Ck··on The Sphere
La Geode was an institutional place sold to the Pathé Gaumont cinema group in 2018. I got news in 2022 that the issue was that it's full of asbestos. I heard there is an ongoing legal procedural because it was not noticed in the contract.. I would really like to know more about what they are doing inside. I followed some architectural projects, and they might have removed the imax dome to operate a simpler wide screen + divided the place for others screens. So sad, it was one of the last omnispherical screen in France, there is only one left in Le Futuroscope.
a1rb4Ck··on French ISPs Ordered to Block Sci-Hub and LibGen
Note that French universities use the public RENATER provider, which do not block, for now. More great technical details in a blog post by Rémy Grünblatt [1]. He use the RIPE Atlas network to probe.

[1] https://translate.google.com/translate?sl=fr&tl=en&u=https%3...

a1rb4Ck··on Automotive Grade Linux Platform Debuts on the 2018 Toyota Camry
A neighbor lab did some works about haptic feedback design for automotive touchscreens [1]. They worked on user comfort using fuzzy models. This could be implemented right now but it seems it's not automotive makers (thus casual customers) first priority. Why would we need good UI when driving is all autonomous.. [1]https//www.researchgate.net/publication/280047157_A_Fuzzy_Expert_Model_of_Haptic_Perception_for_Automobile_Touch-Screen_Displays