A Visual Introduction to Machine Learning (2015)

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Machine learning uses statistical learning to identify patterns in data and make predictions, such as distinguishing homes in New York from homes in San Francisco. A decision tree is a machine learning method that uses if-then statements to identify boundaries and define patterns in the data, but can overfit if it learns irrelevant details.

What makes Intel Optane stand out (2023)

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Intel Optane drives offer ultra-low latency, high durability, and high performance due to 3D XPoint Technology. However, they have high costs and low capacities, making them less appealing for most companies.

Show HN: Signet – Autonomous wildfire tracking from satellite and weather data

Signet uses AI to track US wildfires by analyzing satellite data, weather, and geographic information. It provides assessments and predictions, but users should not rely on it for emergency decisions.

Show HN: What if your synthesizer was powered by APL (or a dumb K clone)?

↑↓ history · ⌃↵ run · ⌃L clear loading wasm…

Rack-mount hydroponics

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The user grew lettuce in a spare server cabinet using a flood and drain system, which they admit is a terrible idea but worked surprisingly well. They used a variety of equipment including grow lights, shelves, and a submersible pump to successfully grow lettuce and herbs, despite initial concerns and some minor issues.

Glassworm Is Back: A New Wave of Invisible Unicode Attacks Hits Repositories

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Glassworm threat actor is back, compromising hundreds of GitHub, npm, and VS Code repositories with invisible Unicode characters. Aikido's malware scanning pipeline detects this threat, and a free tool called Aikido Safe Chain can block supply chain risks in real time.

IBM, sonic delay lines, and the history of the 80×24 display

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The popularity of 80×24 and 80×25 displays is largely due to IBM's dominance in the terminal market, starting with the 3270 terminal in 1971 and the IBM PC in 1981.

$96 3D-printed rocket that recalculates its mid-air trajectory using a $5 sensor

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A low-cost rocket launcher and guided rocket system was built using consumer electronics and 3D-printed components. The system costs around $96 and uses ESP32 and MPU6050 for stabilization and GPS, compass, and barometric modules for orientation and telemetry.

Generating All 32-Bit Primes (Part I)

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The article discusses generating all prime numbers up to a 32-bit limit using various algorithms.

100 hour gap between a vibecoded prototype and a working product

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The author built an app called Cryptosaurus using AI-powered coding, but it took much longer than expected due to various issues with the UI, UX, and infrastructure. The author learned many lessons and believes that vibecoding can be a 10-100X speed improvement over traditional coding, but it still requires a lot of effort and expertise.

A Theory of the World as run by large adult children

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The author discusses how the imagination of two boys, Harold and George, is being stifled by educators, but their creativity is evident in media they've influenced. The author also criticizes government corruption and the influence of money in sports, specifically the US Football Association.

Examples for the tcpdump and dig man pages

User added examples to man pages of tcpdump and dig tools to help beginners. They found the experience rewarding and learned about the importance of accurate documentation.

The Appalling Stupidity of Spotify's AI DJ

You question AI's intelligence and accountability after a disappointing experience with Spotify's AI DJ, which failed to understand basic music concepts. The AI's limitations raise concerns about its ability to preserve and respect the western musical tradition.

Kniterate Notes

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Today we had the first of the material programming project student workshops. We got some UAL Teaching and Learning funding to run a series of workshops on the Kniterate, with the eventual aim of getting students to experiment with the knit programming tools we’re developing. For now, the focus is just getting everyone trained on the machine, which was also a really useful refresher for me. B ...

A most elegant TCP hole punching algorithm

A simple TCP hole punching algorithm is proposed that requires only a destination IP and uses a deterministic approach to derive meta data from a single parameter, eliminating the need for infrastructure and meta data exchange. The algorithm involves using non-blocking sockets, pseudo-random number generators, and a leader-follower approach to choose a successful connection, allowing for ...

Pentagon expands oversight of Stars and Stripes, limits content

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The Pentagon released a memo limiting Stars and Stripes content, restricting wire services, comics, and syndicated features. The changes aim to refocus the publication on its original mission as an independent news source for service members.

How kernel anti-cheats work

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Modern kernel anti-cheat systems like BattlEye and Vanguard operate at the highest privilege level, intercepting kernel callbacks and scanning memory structures to detect cheats transparently while a game is running. These systems use a combination of kernel-mode and user-mode components, including kernel drivers, usermode services, and game-injected DLLs, to implement protections and detect ...

Treasure hunter freed from jail after refusing to turn over shipwreck gold

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Tommy Thompson, a US deep-sea treasure hunter, was released from prison after a decade for refusing to disclose the location of 500 missing gold coins. He discovered millions of dollars' worth of treasure from the 1857 SS Central America shipwreck but was jailed for contempt after failing to account for the missing coins.

Why Mathematica does not simplify sinh(arccosh(x))

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The user discusses Mathematica's handling of trigonometric identities, specifically inverse hyperbolic functions. Mathematica's results for Sinh[ArcCosh[x]] are not always as expected due to the definition of arccosh(x) requiring a branch cut.

Allow me to get to know you, mistakes and all

You're allergic to LLM-processed texts because they obscure the writer's intent and tone, disrupting the conversational process. This genericization robs the recipient of the ability to interpret the message in the context of the writer's unique style and knowledge.

Human Organ Atlas

Show HN: Han – A Korean programming language written in Rust

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Han is a statically-typed, compiled programming language written in Korean. It uses Hangul, a scientifically designed script, as its writing system and compiles to native binaries through LLVM IR.

SBCL Fibers – Lightweight Cooperative Threads

SBCL's fiber implementation provides a lightweight cooperative thread with its own control stack and binding stack, scheduled in user space, to achieve resource efficiency and preserve the sequential programming model. The implementation targets sub-microsecond switches, scalability to many fibers, and multi-core utilization, with features like work stealing, lock-free deque, and efficient ...

Centuries of selective breeding turned wild cabbage into different vegetables

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Alex Wakeman explains how selective breeding turned wild cabbage into various crops like broccoli and Brussels sprouts. Ancient people selected for denser leaves, inflorescences, or edible buds to create different Brassica oleracea varieties.

Bumblebee queens breathe underwater to survive drowning

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Bumblebee queens can survive underwater for up to a week by breathing and using anaerobic metabolism. This discovery challenges previous assumptions about bumblebees and opens up new questions about their conservation.

Slicing Bezier Surfaces

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The code splits a Bezier surface into multiple pieces using the splitBezier function, allowing for deletion of individual pieces. It iteratively slices the surface horizontally based on the 'wide' parameter and creates new surfaces with each half.

Ageless Linux – Software for humans of indeterminate age

Ageless Linux is a registered operating system that intentionally refuses to comply with the California Digital Age Assurance Act, which requires age verification for users under 18, and instead provides a bash script that modifies /etc/os-release to indicate the user is a "user" regardless of age. The project aims to challenge the law and its enforcement mechanism, which it believes is a ...

MCP is dead; long live MCP

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The Model Context Protocol (MCP) is misunderstood as being unnecessary, but it's actually a crucial tool for enterprise-level use cases, providing benefits like simplified security management and automatic content synchronization. In contrast, custom CLIs can be just as problematic as MCP, and teams should be cautious of the hype surrounding them, instead focusing on a balanced approach that ...

Small U.S. town, big company. Can it weather the tariff Blizzard? (Digi-Key) (2025)

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DigiKey, a tech giant in rural Minnesota, struggles with tariffs affecting its business and employees. The company's trade compliance expert, Teri Ivaniszyn, stays up at night worrying about tariffs.

Mathematics Distillation Challenge – Equational Theories

A new project, the Equational Theories Project, aims to settle true-false problems in universal algebra using AI and formal verification. A new challenge, hosted by the SAIR Foundation, asks contestants to create a "cheat sheet" to improve AI performance on these problems.