Who Invented Backpropagation?
Efficient backpropagation (BP) is central to the ongoing Neural Network (NN) ReNNaissance and “Deep Learning.” Who invented it? BP’s modern version (also called the reverse mode of automatic differentiation) was first published in 1970 by Finnish master student Seppo Linnainmaa [BP1] [R7]. In 2020, we celebrated BP’s half-century anniversary! A precursor of BP was published […]
The Road That Killed Legend Jenkins Was Working as Designed
On May 27, 2025, two brothers in Gastonia, North Carolina, asked their dad if they could walk to the neighborhood Food Lion and Subway. It was less than ten minutes from their apartment. Their dad hesitated. He and his wife are protective parents. But he agreed, on the condition that the boys stay on the […]
The Weight of a Cell
Ella Watkins-Dulaney Microbes are so small that tens of thousands could fit in the space of the period at the end of this sentence. And yet, for two of the most widely studied kinds — S. cerevisiae and E. coli — we know their weight with remarkable precision: A single yeast cell weighs about 100 […]
Launch HN: Reality Defender (YC W22) – API for Deepfake and GenAI Detection
Custom pricing and includes: ✓ Custom scan volume ✓ Multi-seat ✓ Audio, Image, Video, and Text ✓ Livestreaming ✓ Expanded deployment options ✓ Results Score, Explainability, and Export ✓ Web interface ✓ Zoom, Teams, Webex, Contact Center integrations ✓ Custom integrations ✓ Chrome extension ✓ Live chat and dedicated support
Show HN: A Minimal Hacker News Reader for Apple Watch Built with SwiftUI
A minimal Hacker News reader for Apple Watch built with SwiftUI. Scrollable top stories feed with title, points, and comments count Tap a story to view comments in a simple tree-style view “Open Article” link at the top opens the article in the watch browser HN-like styling (orange accent) Requirements Xcode 15 or newer macOS […]
FFmpeg Assembly Language Lessons
Welcome to the FFmpeg School of Assembly Language. You have taken the first step on the most interesting, challenging, and rewarding journey in programming. These lessons will give you a grounding in the way assembly language is written in FFmpeg and open your eyes to what’s actually going on in your computer. Required Knowledge Knowledge […]
AWS Vibe Coding Tips and Tricks
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It’s the Housing, Stupid
A few weeks ago, I was on The Compound and Friends, and there was a debate about why we were seeing 2021-like meme stock activity and money market funds holding record assets at the same time. For context, both of these things are true. If we look at the performance of the 100 most shorted […]
The new geography of stolen goods
Aug 17th 2025 | Felixstowe The MSC Ruby is almost ready to leave Felixstowe. Seven remote-controlled gantry cranes are still at work, stacking containers in the ship’s bays. Some 11,000 containers pass through this port each day, making it Britain’s primary conduit to the arteries of global trade. The Ruby’s next call is Gran Canaria—then, […]
Website Is Served from Nine Neovim Buffers on My Old ThinkPad
August 18, 2025 TL;DR: I wrote a Neovim plugin in Lua that serves HTTP requests from open buffers. It has no external dependencies, it has first-class support for serving content in Djot, and it is faster than Nginx so it won’t be a performance bottleneck behind a reverse proxy. What’s not to like? There is […]