I wrote a book called "Crap Towns". It seemed funny at the time

https://substackcdn.com/image/fetch/w_520,h_272,c_fill,f_auto,q_auto:good,fl_progressive:steep,g_auto/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F854b255b-2559-47ff-ac41-689051e3e0c3_578x599.png
Sam Jordison, co-director of Galley Beggar Press, reflects on his book series Crap Towns, which listed the worst places in the UK. He wonders if such a book could be published today due to changing attitudes towards humor and identity politics.

Berkeley Humanoid Lite – Open-source robot

https://lite.berkeley-humanoid.org/static/berkeley-humaonid-lite-cover.png
Researchers created Berkeley Humanoid Lite, an open-source humanoid robot with a modular 3D-printed gearbox, to promote democratization in humanoid robotics. The robot's design emphasizes modularity, ease of fabrication, and cost-effectiveness, with a total hardware cost under $5,000.

Lossless LLM compression for efficient GPU inference via dynamic-length float

https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png
Researchers introduced DFloat11, a lossless compression framework for Large Language Models, reducing size by 30% while preserving outputs. DFloat11 achieves faster inference and longer context lengths compared to uncompressed models.

Wikipedia’s nonprofit status questioned by D.C. U.S. attorney

Parallel ./configure

User wants to utilize 24 CPU cores for ./configure, but it only uses 69% of one core. They created a new build system using make to parallelize configuration tasks.

World Emulation via Neural Network

https://madebyoll.in/posts/world_emulation_via_dnn/inference_diagram.jpg
The user created a playable neural world of a forest trail near their apartment by training a neural network on gameplay videos of the actual world, using a customized camera app to record videos and motion. The neural world is a unique and exciting property that can be constructed from any video file, and the user believes it has the potential to become a new creative medium, similar to ...

Show HN: I used OpenAI's new image API for a personalized coloring book service

https://clevercoloringbook.com/_app/immutable/assets/logo.D0SLjx35.webp
Upload memories to create a personalized coloring book for $23.99 + shipping, following OpenAI's usage policy. We convert memories into a high-quality physical book using OpenAI's Sora model.

I designed my LED matrix PCB with code

https://docs.tscircuit.com/assets/images/matrix-system-requirements-db266ef7e2f69520f89dec615e6f370c.png
This tutorial explains how to build a 3x5 LED matrix controlled by a Raspberry Pi Pico using tscircuit for data visualization and interactive notifications. The matrix is connected to the Pico via a data chain and can be controlled through a simple web interface with API integration and Pico W connection.

Show HN: Empty Enter Expander – Type less in the terminal with this tool

https://raw.githubusercontent.com/waszabi/empty-enter-expander/main/zsh-demo.gif
Commands are stored in a module directory that contains files and folders with lowercase letters at the beginning of their names, which act as shortcuts. Expander uses a directory where the commands are stored. It is called a module directory. Let's say you have a lengthy Git command. Prepare a script that will output it. Place the prepared script in the module directory within the ...

Writing "/etc/hosts" breaks the Substack editor

https://substackcdn.com/image/fetch/w_520,h_272,c_fill,f_auto,q_auto:good,fl_progressive:steep,g_auto/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F6a70f77c-0a93-4254-94f4-71e02d54d879_1194x372.png
A DevOps engineer encountered a "Network Error" in Substack's editor when typing system paths like /etc/h*sts, which was likely due to a Web Application Firewall (WAF) blocking potential path traversal attacks. The engineer found workarounds and suggests that security measures can have unintended consequences for legitimate use cases, highlighting the balance between protection and usability ...

Show HN: Formalizing Principia Mathematica using Lean

https://raw.githubusercontent.com/ndrwnaguib/principia/main/images/principia-mathematica-book-cover.png
This project formalizes the first volume of Prof. Bertrand Russell's Principia Mathematica using Lean theorem prover, aiming for accuracy and clarity. The formalization rigorously follows Prof. Russell's proof, with added statements only for formalization purposes.

Colossal Cave Adventure (1976)

https://raw.githubusercontent.com/Neko250/adventure/master/img/adventure.jpg
Original source code, written in Fortran, from the very first text adventure game in the videogames history (1976). I collected some other goodies from around the internet (maps, walkthroughs...). Even executables for Windows & Mac OS ! I heard about the game in the Halt & Catch Fire TV series. Googled it a bit and found the original src. This repository is for educational purposes only.

Eurorack Knob Idea

https://mitxela.com/img/uploads/sillysynth/euroknob/as5600-0.jpg
The user designed a magnetic knob that combines a patch cable and a knob for Eurorack modules. The prototype uses a 3.5mm jack with a magnetic encoder chip and a small magnet to detect the presence of the knob.

Reading RSS content is a skilled activity

https://www.doliver.org/_ipx/w_3840,q_75/%2F_next%2Fstatic%2Fmedia%2Favatar.b75f9ba5.jpg?url=%2F_next%2Fstatic%2Fmedia%2Favatar.b75f9ba5.jpg&w=3840&q=75
The internet has become evil due to companies commoditizing user attention through algorithms that prioritize engagement over user experience. RSS readers offer a chance to reclaim attention through open tech, requiring a skill and routine to curate valuable content.

Paper2Code: Automating Code Generation from Scientific Papers

https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png
PaperCoder is a multi-agent LLM framework that transforms machine learning papers into functional code repositories. It effectively generates high-quality, faithful code implementations from papers, surpassing strong baselines in the PaperBench benchmark.

A $20k American-made electric pickup with no paint, no stereo, no screen

https://platform.theverge.com/wp-content/uploads/sites/2/2025/04/Blank-Slate-Front-3_4_web.jpg?quality=90&strip=all&crop=16.666666666667%2C0%2C66.666666666667%2C100&w=2400
Slate Auto is launching a sub-$20,000 electric truck with a minimalist design and DIY focus. The truck has a simple shape and can be customized with vinyl wraps and upgrade kits.

Show HN: Magnitude – open-source, AI-native test framework for web apps

https://raw.githubusercontent.com/magnitudedev/magnitude/main/assets/demo.gif
Magnitude is an end-to-end testing framework that uses visual AI agents to adapt to interface changes. It supports natural language testing with steps, checks, and data.

Reproducibility project fails to validate dozens of biomedical studies

https://media.nature.com/lw767/magazine-assets/d41586-025-01266-x/d41586-025-01266-x_50902208.jpg
Brazilian researchers replicated less than half of biomedical studies, with 21% meeting all criteria. Published results tend to overestimate effects, with an average 60% larger impact in original papers.

Curry: A functional logic programming language

https://curry-lang.org/assets/img/curry-social-wide.png
Curry is a declarative multi-paradigm language combining features of functional and logic programming with non-deterministic pattern matching and lazy evaluation. It supports strong typing, immutable bindings, and automatic type inference for a flexible and expressive programming style.

Programming in D: Tutorial and Reference

https://ddili.org/ders/d.en/cover_thumb.png
in paper or Kindle form(That is an Amazon associate link benefiting the The D Language Foundation, which always appreciates donations.), Integers and Arithmetic Operations ++ -- + - * / % ^^ += -= *= /= %= ^^=

Gym Class (YC W22) Is Hiring Character Animation Engineering Lead

https://bookface-images.s3.amazonaws.com/small_logos/4d3a60708bb80373daa580f343f2a1de6f757eb5.png
Gym Class, a leading social VR game, is hiring an Animation Engineer to drive character movement and interaction in its evolving game world. The ideal candidate will have Unity and C# expertise, animation engineering focus, and experience with mobile performance optimization.

Tumor-derived erythropoietin acts as immunosuppressive switch in cancer immunity

Eletters are not edited, proofread, or indexed, but they are screened. if a figure or equation is essential, please include link to public repository with versioning, such as zenodo. authors: "eliotta, sastre-perona and neoadjuvants for the treatment of hepatocellular carcinomas" authors include j. galon

GCC 15.1

GCC 15 is a major release with new features and improvements over 14.x, supporting multiple languages. The GCC developers thank contributors and volunteers for making GCC successful.

Differential Coverage for Debugging

https://research.swtch.com/diffcover2.png
The user is discussing a debugging technique that uses differential coverage to identify code blocks involved in a failing test. This technique compares the code coverage of successful tests with the failing test to pinpoint the relevant code.

Large language models, small labor market effects [pdf]

A new study finds that employers are more likely to encourage their workers to use chatbots. the results suggest that productivity–wage pass-through rates are within the range of standard estimates in the literature. authors: employers should be aware of the potential negative effects of ai on productivity if they do not encourage it proactively - and act accordingly. they say that the data ...

A Love Letter to People Who Believe in People

https://www.swiss-miss.com/wp-content/uploads/2025/04/8-year-old-Tina-Roth-Eisenbeg.jpg
The author reflects on the power of enthusiasm and being a fan, crediting people who believed in her and inspired her to be bold.

ACM's flagship magazine seeks submissions by/for practitioners

https://cacm.acm.org/wp-content/uploads/2025/04/042425.BLOG_.Reversing-the-F-G.jpg
Communications of the ACM (CACM) is seeking articles for its new Practice section, focusing on computing practitioners' understanding and job performance. Articles should offer lasting insights into ideas, tools, and techniques to stay current in the rapidly evolving profession.

Show HN: A modern spreadsheet with Python integration

https://citadel5.com/images/gsc20.9_scr1_s.png
GS-Calc handles large data sets with up to 32 million rows and 16,384 columns, and supports unlimited worksheets and subfolders. It offers fast performance, optimized for large files, and supports various file formats and functions.

Mathematicians just solved a 125-year-old problem, uniting 3 theories in physics

https://static.scientificamerican.com/dam/m/961d75b91fe9876/original/fluid_dynamics_flowing_water_with_pebbles_illustration.jpg?m=1744655002.096&w=600
Mathematicians Yu Deng, Zaher Hani, and Xiao Ma have made a breakthrough in unifying three physical theories that explain fluid motion. Their work, which justifies the equations governing fluid dynamics, is a major stride toward grounding physics in math.

The Policy Puppetry Prompt: Novel bypass for major LLMs

https://hiddenlayer.com/wp-content/uploads/UniversalBypass_FeaturedImage-scaled.jpg
Researchers at HiddenLayer developed a universal and transferable prompt injection technique that bypasses safety guardrails in major AI models, allowing harmful content generation. This technique, called Policy Puppetry, exploits a systemic weakness in LLM training and is difficult to patch.