hackernews

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....

1. Reverse-engineering my speakers’ API to get reasonable volume control Total comment counts : 31 Summary The article discusses the author’s experience with new powered speakers that have built-in streaming service integrations. The speakers are louder than necessary, making it challenging to make small volume adjustments within safe levels for the apartment. To solve this issue, the author plans to build a custom volume knob that provides more precise control within their preferred listening range....

1. Bayesian Statistics: The three cultures Total comment counts : 9 Summary error Top 1 Comment Summary The author of the article suggests that Bayesians can be categorized based on two criteria: whether they incorporate their knowledge or beliefs about the world into their priors, and whether they iterate on the model based on its goodness-of-fit and usefulness. The author labels the resulting combinations as informative/pragmatic, uninformative/objective, and subjective. However, the author disagrees with the model and believes that most Bayesians in industry fall into the category of iterating on the model and using uninformative or weakly informative priors....

1. Node.js adds experimental support for TypeScript Total comment counts : 42 Summary The article discusses the possibility of executing TypeScript files in Node.js by using the experimental flag “–experimental-strip-types”. This allows TypeScript source code to be transpiled into JavaScript source code without performing type checking and discarding types. The article also mentions a TC39 proposal for type annotations and the limitations of the current implementation. It suggests using the Swc package as a possible solution and considers adding support for source locations in error stacks....

1. Anyone can access deleted and private repository data on GitHub Total comment counts : 46 Summary The article discusses a vulnerability on GitHub, where deleted and private repository data can still be accessed by others. This is known as Cross Fork Object Reference (CFOR) vulnerability and occurs when one repository fork can access sensitive data from another fork, including private and deleted forks. The article provides examples of how this vulnerability can be exploited, such as accessing code from a deleted fork or accessing commits made after forking a repository....

1. Open source AI is the path forward Total comment counts : 92 Summary The article discusses how open source software, specifically the Linux operating system, gained popularity and became the industry standard. The author believes that a similar phenomenon will occur with open source AI. They highlight the development of the Llama AI model, which has become competitive with closed models and emphasizes openness, modifiability, and cost efficiency. The author also mentions collaborations with companies like Amazon, Databricks, and NVIDIA to support developers....