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Implementing the SM-2 Algorithm in Rust: An Improved Spaced Repetition System

2024-12-27

The author implemented the SuperMemo SM-2 algorithm, a modified version used in the spaced repetition software Mochi, in Rust. This algorithm dynamically adjusts review intervals based on user performance ratings to optimize learning efficiency. The article details the algorithm's mechanics, including the calculation of the ease factor (EF), determining review intervals, and how user ratings affect algorithm parameters. Rust code is provided with explanations of key design choices.

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(borretti.me)
Development spaced repetition SM-2 algorithm

Simple Live Calculator using Tree-sitter and Cranelift JIT

2024-12-27
Simple Live Calculator using Tree-sitter and Cranelift JIT

This GitHub project demonstrates a simple live calculator built with Tree-sitter and Cranelift JIT. The core code is highly integrated for ease of understanding. The project includes the grammar, a REPL interface, stress tests, and benchmarks. Modifying the grammar automatically updates the main binary. Syntax highlighting is used as an example of Tree-sitter's capabilities.

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(github.com)
Development Live Calculator

The Gap Between Strong and Weak Engineers

2024-12-27

This article explores the capabilities that differentiate strong engineers from average ones. Strong engineers can accomplish tasks that weaker engineers cannot, such as resolving complex bugs, improving legacy code, and undertaking significant architectural overhauls. Weaker engineers struggle with these tasks even with ample time. The article highlights that strong engineers are not simply more efficient but possess the ability to solve complex problems, while weaker engineers are virtually incapable of completing most engineering tasks. The article also offers advice on collaborating with weaker senior engineers, emphasizing the need to be kind but protective of one's time, avoiding excessive demands.

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(www.seangoedecke.com)
Development engineer capabilities

Quiver: A Modern Commutative Diagram Editor for the Web

2024-12-27
Quiver: A Modern Commutative Diagram Editor for the Web

Quiver is a modern web-based editor for creating commutative diagrams. It allows for rapid creation of complex diagrams, rendering them in high quality for screen viewing and exporting to LaTeX via tikz-cd. Features include intuitive interface, support for pullbacks, pushouts, adjunctions, and higher cells, multiple selection, history, custom macros, and HTML embedding for easy sharing. Creating diagrams is significantly faster than writing equivalent LaTeX by hand.

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(github.com)
Development commutative diagram web editor

SkunkHTML: A GitHub Pages Static Site Generator

2024-12-27
SkunkHTML: A GitHub Pages Static Site Generator

SkunkHTML is a static site generator powered by GitHub Actions, enabling users to quickly create and deploy personal blogs or websites to GitHub Pages using Markdown files. Simply upload your Markdown files to the `/markdown-blog/` folder, and GitHub Actions automatically builds and deploys the updated site. SkunkHTML supports the Giscus commenting system and provides detailed documentation and examples. The project is completely open-source and can be forked directly on GitHub without needing a local download.

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(github.com)
Development static site generator

Godview: A Revolutionary AI Image Generation Tool

2024-12-27
Godview: A Revolutionary AI Image Generation Tool

Godview is not your average AI image generation tool. It breaks the limitations of traditional technology, generating incredibly detailed, realistic, and high-quality images based on user-provided text descriptions. Like an artist with a god's-eye view, it precisely captures user intent and translates it into stunning visuals. Godview heralds a new revolution in AI image generation, catering to both professional designers and empowering everyday users to create breathtaking artwork.

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(godview.ai)
AI AI image generation

US Government Mandates Code Sharing to Save Billions

2024-12-27

President Biden signed the SHARE IT Act into law, requiring US federal agencies to share custom-developed source code to reduce redundant software development costs. The act aims to save approximately $12 billion annually by publicly listing and sharing custom code, preventing agencies from unknowingly paying for duplicate work. The law excludes classified code, national security systems, and code posing privacy risks if shared. The initiative has garnered support from software companies like Atlassian and GitLab, who believe code sharing promotes efficiency and innovation.

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(fedscoop.com)
Tech code sharing government software cost savings

Thermodynamic Model Unveils Gold's Journey to Earth's Surface

2024-12-27
Thermodynamic Model Unveils Gold's Journey to Earth's Surface

Researchers have used a thermodynamic model to explain how gold deposits are formed in volcanic settings. The model reveals the crucial role of a previously unconfirmed gold-trisulfur complex (Au-S3). Under specific mantle pressures and temperatures, this complex efficiently transfers gold from the mantle into magma, ultimately leading to its surfacing through volcanic activity. This finding explains the high gold concentrations in certain subduction zone ore deposits and has significant implications for gold exploration.

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(phys.org)
Tech gold formation thermodynamic model mantle magma

Broderbund's 'The Print Shop': A Nostalgic Look Back at a Software Revolution

2024-12-27

In the early 1980s, creating posters and greeting cards was a hassle. Enter Broderbund's 'The Print Shop' in 1984. This user-friendly software, with its abundant fonts and graphics, revolutionized personal computing. Its affordability and ease of use made it a bestseller, driving home computer adoption and laying the groundwork for the desktop publishing industry. While Broderbund's eventual fate was less triumphant, 'The Print Shop's' impact remains significant.

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(theprintshop.club)
Tech The Print Shop Home Computing Desktop Publishing

Gravitational Wave Detectors May Find Neutron Stars Lighter Than White Dwarfs

2024-12-26
Gravitational Wave Detectors May Find Neutron Stars Lighter Than White Dwarfs

Scientists used data from the LIGO and Virgo gravitational wave observatories to search for low-mass neutron stars with less than 1.4 solar masses. While none have been found yet, the study suggests that such neutron stars could form due to the rapid compression of the core during a supernova explosion. This research provides new constraints on the properties of neutron star matter and the mass limits of neutron stars. More sensitive gravitational wave detectors in the future will further test this theory.

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(www.universetoday.com)
Tech Neutron stars Gravitational waves

The Impossibility Theorem of Clustering: Why Perfect Algorithms Don't Exist

2024-12-26
The Impossibility Theorem of Clustering: Why Perfect Algorithms Don't Exist

This article explores the 'impossible triangle' problem in clustering algorithms. Drawing a parallel to the CAP theorem, the author argues that every clustering algorithm must sacrifice one of three desirable properties: scale invariance, richness, and consistency. The article defines each property and illustrates how algorithms like k-means compromise on one to achieve the others. The conclusion emphasizes that developers should choose algorithms based on the specific needs of their application, accepting that a perfect clustering algorithm is mathematically impossible.

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(blog.codingconfessions.com)
AI clustering algorithms impossibility theorem

Reverse Engineering Elgato's Stream Deck Plus: Breaking Free from Proprietary Software

2024-12-26
Reverse Engineering Elgato's Stream Deck Plus: Breaking Free from Proprietary Software

Den Delimarsky successfully reverse-engineered the Elgato Stream Deck Plus and shared the detailed process. Using tools like Wireshark, he captured and analyzed the USB communication between the Stream Deck Plus and a computer, revealing the workings of buttons, screen, and knobs. This includes the image transfer protocol, button status feedback, and screen touch event coordinate data. He then updated the DeckSurf SDK with a C# example, enabling developers to control the Stream Deck Plus without relying on Elgato's software.

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(den.dev)
Hardware hardware hacking

Deep Learning for Inverse Design of Complex Nanoparticle Heterostructures

2024-12-26
Deep Learning for Inverse Design of Complex Nanoparticle Heterostructures

Researchers used deep learning and heterogeneous graph neural networks to inverse design upconverting nanoparticles (UCNPs) with applications in biosensing, super-resolution microscopy, and 3D printing. A large-scale dataset of over 6,000 UCNP emission spectra was generated and used to train a GNN model. Gradient-based optimization identified structures with a predicted emission 6.5 times higher than any UCNP in the training set under 800nm illumination. This work reveals new design principles for UCNPs and provides a roadmap for DL-based inverse design of nanomaterials.

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(chemrxiv.org)
2. Tech nanomaterials inverse design

T2 SDE: A Low-Code Cross-Compilation System Development Environment

2024-12-26

T2 SDE is a low-code, ultra-portable package manager and Linux distribution that enables fully automated, reproducible, cross-compilation of custom operating systems using up-to-date packages. It supports nearly all major CPU architectures, C libraries, GUI systems, and desktop environments, plus countless special-purpose and embedded firmware packages. The latest release, T2 24.12, boasts expanded architecture support, including LibreOffice, OpenJDK, Qemu, and even a new Rust-based desktop environment, Cosmic Desktop. T2's commitment to supporting a wide range of architectures, including legacy and niche ones like IA-64 Itanium, is complemented by ongoing improvements, including full-disk encryption and LVM support for enhanced user experience.

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(t2sde.org)
Development system development environment cross-compilation

Tutorial: Building a Simple Unix Shell in C

2024-12-26
Tutorial: Building a Simple Unix Shell in C

This tutorial walks you through creating a basic Unix shell in C. The author details the shell's lifecycle: initialization, command interpretation, and termination. Key aspects covered include reading user input, parsing commands, executing programs using fork() and exec(), and handling built-in commands like cd, help, and exit. Dynamic memory allocation using malloc() and realloc() is emphasized, and the use of getline() is explained. While simplified (no piping, redirection, or globbing), the tutorial provides a solid foundation for understanding shell programming in C.

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(brennan.io)
Development C Programming System Programming

OpenAI: The Next Visa? Challenges and Risks on the Path to Monopoly

2024-12-26
OpenAI: The Next Visa? Challenges and Risks on the Path to Monopoly

The article compares OpenAI to Visa, arguing its success isn't due to superior technology but to erecting barriers through exclusive deals, government contracts, and licensing restrictions to limit competition. OpenAI attempts to build these barriers by lobbying for government regulation, restricting investors from funding competitors, and securing long-term exclusive contracts with large clients. However, this strategy faces political and competitive headwinds. Similar to Visa's past challenges, the increasing ubiquity of LLM technology threatens the core API business. Competition from Elon Musk and potential relaxation of government regulation further complicate OpenAI's efforts to maintain its dominance. Ultimately, OpenAI's future hinges on whether it can build sufficiently high barriers to entry, both technologically and legally, to avoid repeating Visa's antitrust lawsuit.

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(sherwood.news)
AI monopoly

Sub-pixel Distance Transform: A Breakthrough in High-Quality Font Rendering for WebGPU

2024-12-26

This article delves into the challenges and solutions for achieving high-quality font rendering in WebGPU. Addressing shortcomings in existing Signed Distance Fields (SDFs) generation methods, the author presents a novel sub-pixel accurate distance transform algorithm (ESDT). ESDT cleverly combines CPU and GPU strengths, employing an improved Euclidean Distance Transform to effectively solve the deviations encountered in traditional methods when handling sub-pixel accuracy and grayscale pixels. The result is precise rendering of various fonts, including emojis, significantly enhancing font rendering quality.

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(acko.net)
Development Font Rendering Sub-pixel Distance Transform

Build Your Own Virtual Machine: A Step-by-Step Guide

2024-12-26

This tutorial guides you through building your own virtual machine (VM) capable of running assembly language programs, such as 2048 or Roguelike games. Even if you're already a programmer, this project provides a deeper understanding of computer architecture and how programming languages work. The tutorial covers core VM concepts, the LC-3 architecture, instruction sets, trap routines, program loading, and more, with detailed code examples and explanations. The final code is approximately 250 lines of C, making it accessible to those with basic C/C++ knowledge.

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(www.jmeiners.com)
Development virtual machine

The Enigma of Ghostty: An Unresolved Mystery

2024-12-26
The Enigma of Ghostty: An Unresolved Mystery

Ghostty is a mysterious entity whose identity and information are largely unknown, like a ghost hidden deep within the internet. Discussions about Ghostty are mainly concentrated on online forums and social media, with various speculations about its identity. Some believe it's an individual, others a group, and some even consider it a fictional character. The mystery surrounding Ghostty has attracted the attention of numerous netizens, becoming a fascinating internet cultural phenomenon. However, Ghostty remains enigmatic, and its true identity remains unrevealed.

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(ghostty.org)
Misc internet mystery internet culture mysterious figure

AGI Attempt on the Tokio Runtime: A Failed Biologically-Inspired AI Experiment

2024-12-26
AGI Attempt on the Tokio Runtime: A Failed Biologically-Inspired AI Experiment

A developer attempted to build an AGI system based on a biological neural network on the Tokio runtime. He built an asynchronous neural network and trained it using genetic algorithms, but the experiment ultimately failed, achieving a maximum score of only 3. The author suggests that Tokio's inability to efficiently handle the massive number of neural impulses, and the optimization strategy of the genetic algorithm, might be responsible for the failure.

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(www.christo.sh)
AI biological neural network

Arcan 0.7 Released: The All-Tomato Desktop Update Arrives

2024-12-26
Arcan 0.7 Released: The All-Tomato Desktop Update Arrives

Arcan 0.7 marks the end of the second phase of the 'anarchy on the desktop' project and the beginning of the final phase. This release focuses on bug fixes and improvements to Lash#Cat9 and Xarcan. Lash#Cat9, a Lua-based command-line environment, adds features such as a Debug Adapter Protocol implementation and an interactive spreadsheet. Xarcan allows for custom window managers, utilizing Arcan as a display driver and enabling interoperability with X servers. Arcan 0.7 aims to improve performance and security, with future versions planned to feature more flexible remote programming and simpler device connection.

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(arcan-fe.com)
Development

Lua: An Underrated Programming Language

2024-12-26
Lua: An Underrated Programming Language

Lua, a concise and efficient embedded scripting language created in 1993, remains surprisingly underrated despite its strengths. This article highlights Lua's advantages: ease of learning and mastery, an excellent C API, multi-paradigm support, and exceptional embeddability. While widely used in games and embedded systems, the author also points out some unique aspects of Lua, such as its indexing conventions (starting at 1 but not mandatory), error handling, and nil-terminated arrays, which developers should be aware of. Overall, Lua is a powerful language deserving more recognition; its efficiency is evident in applications like Neovim plugins.

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(nflatrea.bearblog.dev)
Development scripting language embedded

Tokyo Unveils 3D Digital Twin Viewer: Real-time Data for Urban Management

2024-12-26
Tokyo Unveils 3D Digital Twin Viewer: Real-time Data for Urban Management

The Tokyo Metropolitan Government launched a beta version of its 'See Tokyo in 3D' digital twin platform. Built using the TerriaJS framework, this 3D viewer integrates real-time data such as traffic, river levels, and shelter information, offering a comprehensive view of Tokyo. The platform aids urban planning and management by providing a clear visualization of city operations. Data conversion tools are also provided to promote the use of CityJSON in Japan's developer community, with parts of the source code being open-sourced.

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(info.tokyo-digitaltwin.metro.tokyo.lg.jp)
Tech Digital Twin 3D Modeling City Data Visualization Urban Management

WebAuthn: The Future of Passwordless Authentication

2024-12-26

This book delves into WebAuthn, a public key cryptography-based authentication system designed to replace vulnerable password systems. Starting with the shortcomings of passwords, it progressively introduces core WebAuthn concepts, including U2F, FIDO2, passkeys, and the WebAuthn API's usage. It details public key signature schemes, RP IDs, the CTAP2 protocol, attestation, and various extensions. Server-side implementation, platform APIs (iOS, Android, Windows), and public key formats are also covered. WebAuthn combines security keys and platform authenticators, utilizing random challenges and multiple security mechanisms to effectively address phishing attacks and database leaks, providing users with a more secure and reliable authentication experience.

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(www.imperialviolet.org)
AI password security Authentication Password Security

Rust Library Upgrade Challenges: A Clever Way to Avoid Version Conflicts

2024-12-26
Rust Library Upgrade Challenges: A Clever Way to Avoid Version Conflicts

Upgrading libraries in the Rust ecosystem often causes cascading effects and significant trouble. This article introduces a technique called the "semver trick", which cleverly solves the problem of upgrading less frequently used APIs without changing commonly used ones by having a library depend on its future version. This method is particularly useful for avoiding the need for large-scale coordinated upgrades across the entire dependency chain due to breaking changes in a single library, greatly simplifying the upgrade process.

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(github.com)
Development version upgrade library upgrades

A Minimalist ELF: Stripping Complexity to the Core

2024-12-26

This article details the author's journey in simplifying a basic Linux program, culminating in a minimalist ELF file. Starting with a simple "Hello World" program, the author progressively removes complexities like standard libraries, modern security features, debugging information, and error handling. The process delves into ELF file structure, symbol tables, sections, and the role of linker scripts, using assembly language to directly manipulate system calls for program functionality. The author concludes by creating a custom linker script, loading code and data segments into specified memory addresses, demonstrating the flexibility and low-level details of ELF file construction.

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(4zm.org)
Development system calls linker scripts systems programming

Python subprocess Default Behavior Change: Enhanced Performance, Balanced Security

2024-12-26

Python's subprocess module is changing its default behavior of closing all file descriptors. This change aims to improve performance, especially when dealing with a large number of file descriptors, avoiding performance bottlenecks caused by closing each descriptor individually. However, altering the default behavior could introduce security risks. Developers are advised to choose the `close_fds` parameter based on their specific needs and take appropriate security measures, such as ensuring all file descriptors are marked as non-inheritable. This change carefully balances performance and security, aiming to provide developers with a more flexible and efficient subprocess management solution.

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(bugs.python.org)
Development

Gondwanaland: An Ancient Supercontinent's Modern History

2024-12-26
Gondwanaland: An Ancient Supercontinent's Modern History

Around 400 million years ago, Australia was part of Gondwanaland, a supercontinent encompassing Antarctica, India, South America, and others. About 200 million years ago, it began breaking apart, leading to the continental configurations we see today. The Gondwana/Land project, an international research initiative, explores Gondwanaland's modern history, examining its impact from the remnants we protect to the resources we exploit. The name 'Gondwana' originates from a region in central India, and its modern usage is interwoven with colonial history, the Industrial Revolution, and resource extraction. Gondwanaland's mythical status, appearing in fiction and shaping cultural perceptions, is also investigated. While some Gondwanan remnants, like Australia's Gondwana Rainforests, are protected, their historical links to Indigenous peoples are often overlooked. This multidisciplinary project aims to unravel the complete story of Gondwanaland, revealing its significance in our modern world.

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(www.australiangeographic.com.au)
Tech Gondwanaland continental drift geological history
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