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Reverse Engineering All the Raspberry Pis

news.ycombinator.com Unknown 2025-11-01 23:20:35

Earlier this month I covered Jonathan Clark's effort to reverse-engineer the Pi Zero 2 W, and just yesterday, I discovered TubeTime reverse-engineered the Compute Module 5. Both are graciously sharing their schematics and process on GitHub: jonny12375/rp3a0 for the Zero 2 W / RP3A0 schlae/cm5-reveng for the CM5 / RP2712 Raspberry Pi shares limited board schematics, but sometimes—especially when digging into some esoteric edge case for a carrier board, or in Jonathan's case, desoldering all t

Topics: lumafield pi scans video zero
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Microsoft will kill the Lens PDF scanner app for iOS, Android

bleepingcomputer.com Unknown 2025-12-03 23:59:19

Microsoft announced that it will phase out the Microsoft Lens PDF scanner app for Android and iOS devices starting in September. Microsoft Lens (formerly known as Office Lens) can convert images into PDF, Word, PowerPoint, and Excel files, and it is capable of scanning both printed and handwritten text. Currently, the app has been downloaded 50 million times on the Google Play Store (with over 952,000 reviews with an average of 4.9/5 rating) and received nearly 136,000 ratings on Apple's App St

Topics: app lens microsoft scans users
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2,500-year-old Siberian 'ice mummy' had intricate tattoos, imaging reveals

news.ycombinator.com Unknown 2025-12-11 02:29:40

2,500-year-old Siberian 'ice mummy' had intricate tattoos, imaging reveals 4 days ago Share Save Georgina Rannard Science correspondent Share Save G Caspari and M Vavulin Scans of the ice mummy's skin revealed details of animals and birds on her arms and hands High-resolution imaging of tattoos found on a 2,500 year old Siberian "ice mummy" have revealed decorations that a modern tattooist would find challenging to produce, according to researchers. The intricate tattoos of leopards, a stag,

Topics: caspari scans skin tattoos woman
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Imaging reveals intricate tattoos of 2,500-year-old Siberian ice mummy

news.ycombinator.com Unknown 2025-12-11 08:29:40

2,500-year-old Siberian 'ice mummy' had intricate tattoos, imaging reveals 4 days ago Share Save Georgina Rannard Science correspondent Share Save G Caspari and M Vavulin Scans of the ice mummy's skin revealed details of animals and birds on her arms and hands High-resolution imaging of tattoos found on a 2,500 year old Siberian "ice mummy" have revealed decorations that a modern tattooist would find challenging to produce, according to researchers. The intricate tattoos of leopards, a stag,

Topics: caspari scans skin tattoos woman
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The Pandemic Appears to Have Accelerated Brain Aging, Even in People Who Never Got Covid

wired.com Javier Carbajal 2025-12-24 20:52:21

More than five years after the start of the Covid-19 pandemic, we are still discovering the after-effects of not only the virus but also the prolonged period of stress, isolation, loss, and uncertainty that the pandemic caused. A new scientific study, published this month in Nature Communications, has revealed that the pandemic may have accelerated brain aging in people even if they were never infected with the coronavirus. Researchers at the University of Nottingham in the UK analyzed brain im

Topics: brain pandemic people scans study
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How often is the query plan optimal?

news.ycombinator.com Unknown 2026-02-05 11:19:27

The basic promise of a query optimizer is that it picks the “optimal” query plan. But there’s a catch - the plan selection relies on cost estimates, calculated from selectivity estimates and cost of basic resources (I/O, CPU, …). So the question is, how often do we actually pick the “fastest” plan? And the truth is we actually make mistakes quite often. Consider the following chart, with durations of a simple SELECT query with a range condition. The condition is varied to match different fracti

Topics: cost data index plan scans
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