hackernews

1. I don’t know how CPUs work so I simulated one in code (2019) Total comment counts : 16 Summary The author recounts their journey of learning about computers by reading the book “But How Do It Know?” by J. Clark Scott, which explains the components of a simple 8-bit computer. Inspired by this, the author decides to implement their own version of the computer in code. They describe their project, called “simple-computer,” which simulates the workings of the computer, including CPU code, keyboard inputs, and text rendering....

1. Show HN: Free e-book about WebGPU Programming Total comment counts : 16 Summary The article introduces the concept of WebGPU, a new graphics API that aims to bring native graphics capabilities to the web. Unlike other APIs, WebGPU is essentially a wrapper for existing APIs like Vulkan, Metal, and DirectX 12, making it simpler and more widely available. The article discusses the benefits of learning WebGPU, such as its common denominator status, availability on all platforms, and the possibility of GPU computing on the web....

1. Open Source Farming Robot Total comment counts : 62 Summary The article is about FarmBot, a robotic system for automated food production. It highlights the various applications of FarmBot, including home use, education, research, and commercial farming. The article also mentions the benefits of using FarmBot, such as reduced labor costs, improved efficiency, and lower carbon emissions. It includes testimonials from customers and showcases how FarmBot is used in different settings, such as educational institutions and non-profit organizations....

1. The future of kdb+? Total comment counts : 17 Summary The author discusses the use cases for kdb+, a database technology, including historical market data storage, local quant analysis, real-time streaming calculation engines, and distributed computing. They argue that most users don’t actually need the speed of kdb+ and that competitors are now fast enough. They predict that kdb+ will struggle to attract new clients and that Python-based tools like DuckDB and Polars will become more popular for local quant analysis....

1. Peerfetch – Peer-to-Peer HTTP over WebRTC Total comment counts : 11 Summary The article discusses the implementation of a peer-to-peer HTTP protocol over WebRTC. This allows for a secure connection from a web browser to devices hidden behind a firewall. It provides an HTTP client wrapper and a server-side HTTP proxy. The article also mentions a step-by-step example and a workshop recording for further information. Top 1 Comment Summary The article explains how the website “camect....

1. How I got my laser eye injury Total comment counts : 38 Summary error Top 1 Comment Summary The article discusses the importance of laser safety curtains in a laser welding setup. Without these curtains, the reflections from the powerful 2500 watt laser could potentially blind someone at a significant distance. It further highlights the nominal ocular hazard distance (NOHD) of 10km, indicating the potential danger of the laser. The author also mentions that they obtained the laser welder at a low cost and find it easy to weld various materials with minimal skill....

1. macOS in QEMU in Docker Total comment counts : 26 Summary The article discusses a project called Docker-OSX, which allows users to run Mac OS X in Docker containers with near-native performance. The project enables various features such as X11 Forwarding, CI/CD for OS X Security Research, iMessage security research, and more. The article provides instructions on how to set up and use Docker-OSX, including enabling SSH, connecting iOS devices over USB on Linux, and installing homebrew on macOS....

1. SAM 2: Segment Anything in Images and Videos Total comment counts : 40 Summary The article discusses the Meta Segment Anything Model 2 (SAM 2), which is a model designed for promptable visual segmentation in images and videos. The SAM 2 model is built using a transformer architecture with streaming memory for real-time video processing. It also includes an interactive data engine for collecting a large video segmentation dataset. The article provides instructions on how to install and use SAM 2 for image and video prediction, as well as examples and resources for different use cases....

1. tolower() with AVX-512 Total comment counts : 12 Summary The article discusses the use of SIMD instructions for efficient string processing. Specifically, it focuses on the utilization of masked loads and stores for handling small strings in SIMD vector registers. The article mentions that certain SIMD instruction sets, such as ARM SVE and AVX-512-BW, support useful masked loads and stores at the byte level. The author explores using AVX-512-BW instructions to implement a “tolower()” function that can process 64 bytes at a time....

1. How to debug your battery design Total comment counts : 13 Summary The article discusses the challenges faced by engineers in designing batteries for electric vehicles. It highlights the trade-off between high energy and high power batteries and the various constraints such as safety, lifetime, weight, and cost. The use of simulation is recommended to debug batteries and optimize their performance. The article also mentions the difficulties faced by engineers in testing different battery designs and the cost associated with it....