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Chumby 8 Kernel Upgrade: Solving the 100% CPU Usage Mystery

2025-01-13

While upgrading the Linux kernel of his Chumby 8 device to version 6.x, the author encountered a persistent 100% CPU usage problem. Through time-reversal debugging, kernel profiling, and a deep dive into the `/proc/stat` file, the root cause was traced to a timing issue in the kernel code that reads the PXA168 hardware timer register, resulting in inaccurate idle time counting. The author fixed this problem and contributed the solution back to the main Linux kernel.

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(www.downtowndougbrown.com)
Development Hardware Debugging

arXivLabs: Experimental Projects with Community Collaborators

2025-07-02
arXivLabs: Experimental Projects with Community Collaborators

arXivLabs is a framework that lets collaborators develop and share new arXiv features directly on our website. Individuals and organizations working with arXivLabs embrace our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners who share them. Have an idea for a project that will benefit the arXiv community? Learn more about arXivLabs.

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(arxiv.org)
Development

Play Brick Breaker with Your Hands!

2025-01-20
Play Brick Breaker with Your Hands!

Forget controllers! 'Manual Brick Breaker' lets you play the classic game using only your hands. The game uses your webcam to track your palm movements, controlling the paddle to break bricks. Difficulty increases with each level, speeding up the ball and shrinking the paddle, testing your reflexes. All processing happens directly in your browser, ensuring privacy. The game's code is open-source, built with JavaScript, HTML canvas, and MediaPipe hand tracking. The creator also offers other fun open-source projects, such as video-to-ASCII art converters.

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(collidingscopes.github.io)
Game hand tracking web game

Model Context Protocol (MCP): The Next Big Thing for LLM Integration—But With a Catch

2025-04-06
Model Context Protocol (MCP): The Next Big Thing for LLM Integration—But With a Catch

Model Context Protocol (MCP) is emerging as the standard for Large Language Model (LLM) integration with tools and data, dubbed the "USB-C for AI agents." It enables agents to connect to tools via standardized APIs, maintain persistent sessions, run commands, and share context across workflows. However, MCP isn't secure by default. Connecting agents to arbitrary servers without careful consideration can create security vulnerabilities, potentially exposing shell access, secrets, or infrastructure via side-channel attacks.

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(elenacross7.medium.com)
AI MCP protocol

A Once-Forbidden Fruit: The Secret Ingredient to Delicious Christmas Punch

2024-12-29
A Once-Forbidden Fruit: The Secret Ingredient to Delicious Christmas Punch

Making the traditional Mexican Christmas punch, Ponche Navideño, was once hampered by import restrictions on a key ingredient: tejocotes. These small, golden fruits, with their unique aroma and high pectin content, give the punch its distinctive flavor and thickness and are considered a symbol of Christmas in Mexico. For a long time, US customs prohibited their import due to concerns about fruit flies, leading to a black market for the rare fruit. However, in 2015, the USDA finally lifted the ban, making this festive drink much easier to make in the US. Now, tejocotes are readily available across the US, allowing people to enjoy this unique Christmas beverage that blends flavors from Africa, Asia, and the Americas.

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(www.atlasobscura.com)
Misc Christmas Punch Tejocotes Mexican Culture

The Collapse of the Antitrust Case: Investigating the Dallas Housing Market

2025-08-01
The Collapse of the Antitrust Case: Investigating the Dallas Housing Market

This article investigates claims that the Dallas housing market is monopolized by large homebuilders. By contacting economists and industry analysts quoted in a prominent article making this claim, the author reveals that the arguments are based on misinterpretations, distortions, and a lack of evidence. Research shows Dallas's homebuilder market concentration is far below the threshold for problematic levels, and per capita new home construction has steadily increased. The author challenges the simplistic linkage of market concentration to rising housing prices and argues that overly aggressive accusations against large builders could harm long-term housing construction.

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(www.derekthompson.org)
Tech

Open Source PebbleOS Smartwatches Are Back: Core 2 Duo and Core Time 2 Pre-orders Open

2025-03-18
Open Source PebbleOS Smartwatches Are Back: Core 2 Duo and Core Time 2 Pre-orders Open

rePebble has announced two new smartwatches running open-source PebbleOS: the Core 2 Duo and the Core Time 2. The Core 2 Duo features an ultra-crisp black and white display, a polycarbonate frame, costs $149, and starts shipping in July. The Core Time 2 boasts a larger 64-color display, a metal frame, costs $225, and begins shipping in December. Both watches are inspired by the classic Pebble design, offering long battery life, a simple and beautiful aesthetic, and compatibility with thousands of existing Pebble apps. Available exclusively for pre-order on the rePebble website, quantities are limited.

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(ericmigi.com)
Hardware

AI Boosts Gravitational Wave Detection: Deep Loop Shaping Breakthrough

2025-09-05
AI Boosts Gravitational Wave Detection: Deep Loop Shaping Breakthrough

Scientists have used a deep learning technique called Deep Loop Shaping to significantly improve the control precision of the Laser Interferometer Gravitational-Wave Observatory (LIGO), reducing noise by up to 100 times. This technology, using reinforcement learning, optimizes LIGO's feedback control system, enabling it to measure gravitational waves more stably. This helps astronomers delve deeper into the dynamics and formation of the universe, such as detecting more intermediate-mass black holes and studying neutron star collisions in greater detail. This breakthrough is expected to influence the design of future gravitational wave observatories and further expand our understanding of the cosmos.

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(deepmind.google)
Tech Gravitational Waves

Local Deep Research Assistant: A Powerful AI Research Tool Combining LLMs and Web Search

2025-03-11
Local Deep Research Assistant: A Powerful AI Research Tool Combining LLMs and Web Search

A powerful AI-powered research assistant performing deep, iterative analysis using multiple LLMs and web searches. Run it locally for privacy or configure it for cloud-based LLMs (Claude, GPT) for enhanced capabilities. It supports full webpage analysis, offers rich output options (detailed findings with citations, reports, summaries), and features local document search (RAG) for private document collections. The system intelligently selects search sources (Wikipedia, arXiv, DuckDuckGo, etc.) based on your query, offering flexible LLM and search engine support.

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(github.com)
Development Research Tool

C64 Coding Tricks: Drawing Two Lines in 34 Bytes

2025-04-16
C64 Coding Tricks: Drawing Two Lines in 34 Bytes

This article recaps the code optimization tricks used in a Commodore 64 coding competition. The challenge: create a C64 executable (PRG) that draws two lines using the fewest bytes possible. The article details the clever techniques employed by participants, including leveraging ROM subroutines, incremental screen pointer manipulation, self-modifying code, exploiting the power-on state, unconventional control flow, and bitpacked line drawing. The winning entry achieved an astonishing 34 bytes, showcasing impressive code optimization skills.

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(nurpax.github.io)
Development

Seasoned Developer Seeking New Opportunities: Job Hunting & Consulting

2025-04-27
Seasoned Developer Seeking New Opportunities: Job Hunting & Consulting

After four years at Oracle, the author finds himself job hunting and exploring new avenues. He's a seasoned developer proficient in Ruby/JavaScript, product documentation, and developer relations, actively seeking employment while offering consulting services, particularly in Mac/Unix automation. He plans to relaunch blog sponsorships, leveraging his established readership and strong Google ranking to find a suitable role or consulting project.

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(brettterpstra.com)
Development consulting

ScyllaDB Shifts to Source-Available License for its Database

2024-12-19
ScyllaDB Shifts to Source-Available License for its Database

ScyllaDB announced it's transitioning its flagship product, ScyllaDB Enterprise, from closed-source to a source-available license, offering a free tier with full enterprise capabilities. This simplifies their dual release stream, providing greater community value. The future involves a single release stream, consolidating core features for improved performance and efficiency; examples include 30X faster node addition/removal via file-based streaming and workload prioritization for balancing multiple workloads on a single cluster. While potentially unpopular with some open-source users, ScyllaDB believes this change benefits the company and accelerates progress on roadmap milestones like Raft for data, optimized tablet elasticity, and tiered (S3) storage.

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(www.scylladb.com)
Development Source-Available License Open-Source Database

Mob Programming: How Collaborative Coding Solves Persistent Development Problems

2025-08-24

This article explores how mob programming effectively addresses persistent issues in software development. The author observes that many problems, such as communication bottlenecks, decision-making paralysis, and technical debt, simply fade away with this approach. Mob programming encourages Agile methodologies, fostering face-to-face collaboration and a continuous focus on code quality and simplicity. This leads to rapid problem-solving, reduced wait times, and increased efficiency. It minimizes reliance on email and extensive documentation, promoting close teamwork and knowledge sharing, ultimately improving overall software development efficiency and quality.

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(mobprogramming.org)
Development mob programming software development efficiency

Emacs Lisp Type Checking Macro: declare-type

2025-05-04

This article introduces `declare-type`, an Emacs Lisp macro for runtime type checking of function arguments. Leveraging the advice mechanism, it adds type checks before function execution. `declare-type` supports optional arguments and complex type specifications, detecting insufficient arguments or type mismatches. While currently lacking support for type variables and sophisticated type relationships, it provides robust basic type checking for improved Emacs Lisp code safety.

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(alhassy.com)
Development

Manage Your Dotfiles with Just Git

2025-08-31

Tired of complex dotfile managers like chezmoi, stow, and yadm? This article shows you how to use Git to manage your dotfiles with simplicity. Create a Git repository in your home directory, ignore all files with a `.gitignore`, and then force-add the files you want to track (e.g., `~/.bashrc`). Use `git add -f` or create an alias like `track-file` for easy tracking and syncing across machines. Handle machine-specific configurations with simple hostname checks in your main dotfiles. Ditch the extra tools and manage your dotfiles efficiently with Git!

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(ericgreer.info)
Development

Oxide's Uniform Compensation: A Surprisingly Successful Experiment

2025-05-01
Oxide's Uniform Compensation: A Surprisingly Successful Experiment

Oxide, a tech company, implemented a uniform compensation model, defying traditional structures. This article details the surprisingly positive outcomes: employees take performance seriously, hiring is rigorous, all roles are valued equally, employees are versatile, the organization is flatter and more efficient, feedback is constructive, focus shifts to crucial work, and teamwork thrives. While the future is uncertain, Oxide's experiment shows uniform compensation can build a mission-driven team focused on customer service.

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(oxide.computer)
Startup uniform compensation

macOS Malware Scans Slowing App Launches

2025-05-01

Developer Jeff Johnson discovered that macOS's syspolicyd process performs malware scans on applications, causing slow launches for apps like Xcode, FileMerge, and Google Chrome. These scans consume significant CPU resources, leading to noticeable delays even for small apps. Johnson suspects syspolicyd scans not only the app itself but also its linked libraries. He resolved the issue by disabling System Integrity Protection (SIP), but this also disables some system services. The article explores the root cause and expresses frustration with this seemingly unnecessary security measure, preferring background scans to foreground interruptions.

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(lapcatsoftware.com)
Development malware scan slow app launch

GitHub Org Scraper Scripts

2025-05-25
GitHub Org Scraper Scripts

This suite of scripts scrapes GitHub for organization information, ultimately producing a TSV file containing the organization name, URL, location, and star counts of selected repositories. `get_all_orgs.sh` fetches a list of all GitHub organizations; `get_orgs_tsv.py` scrapes data for each organization and outputs a TSV; `sorry.sh` handles GitHub's rate limiting policy, requiring users to manually reset their IP address.

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(github.com)
Development scraper

Intellectual Property is Dumb: A Vision for Open-Source AI

2025-02-22

The author argues that intellectual property is a flawed concept, countering President Biden's comparison of piracy to theft. Piracy, unlike theft, allows widespread access to resources, akin to photography rather than robbery. Concerned about wealth concentration, the author envisions AI delivering immense societal value without profit. He reminisces about the early internet's open-source, high-value, low-profit model and aims to disrupt current business models through open-source projects like comma.ai and tinygrad. The goal is to make the tech sector unprofitable for speculators, creating a fairer technological landscape.

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(geohot.github.io)
AI

Three Tips to Conquer Difficult Problems in Software Development

2025-08-23
Three Tips to Conquer Difficult Problems in Software Development

Conquering tough problems in software development isn't easy. This article suggests three practical tips: First, actively listen to your teammates' difficulties and directly ask, "Why is this hard?" Second, encourage deep exploration of seemingly impossible solutions, investigating their feasibility under specific conditions. Even if not ultimately adopted, this process sparks new ideas. Finally, design multiple solutions; even if seemingly time-consuming, a deeper understanding of the problem provides more leverage for the final implementation. Ultimately, collective understanding is far more important than the code itself.

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(programmersstone.blog)
Development

Claude Code: The Photography Era of Programming?

2025-08-03

This article reflects on six weeks of using Claude Code, an AI coding assistant that has dramatically changed the author's approach to coding. He completed numerous tasks that would have normally taken months or even years, including codebase migrations and building testing strategies. Claude Code enabled a 'write first, decide later' approach and significantly boosted the team's game prototyping efficiency. While acknowledging its imperfections, the author believes Claude Code has fundamentally altered programming paradigms, similar to how photography revolutionized painting.

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(blog.puzzmo.com)
Development

Burning Sensation Leads to Shocking Brain Parasite Diagnosis

2025-02-14
Burning Sensation Leads to Shocking Brain Parasite Diagnosis

A 30-year-old woman experienced a burning sensation in her feet that progressed to her entire body after a trip to Thailand, Japan, and Hawaii. Two emergency room visits yielded only elevated eosinophil counts. A third visit to Massachusetts General Hospital revealed the cause: brain parasites. Her symptoms were linked to consuming sushi, highlighting the importance of food safety, especially while traveling abroad.

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(arstechnica.com)
Tech parasite infection medical case travel health

Building the Simplest Semantic Layer with YAML and Python

2025-08-20
Building the Simplest Semantic Layer with YAML and Python

This article demonstrates building a minimal semantic layer using a YAML file and a Python script, querying 20 million NYC taxi records to illustrate its value. It clarifies when a semantic layer is truly beneficial and when it's overkill. The piece contrasts semantic layers with traditional databases, highlighting advantages in data governance, caching, secure access control, and LLM integration.

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(motherduck.com)
Development semantic layer

Microsoft Shuts Down Shanghai IoT & AI Lab Amidst Growing Tensions

2025-03-31
Microsoft Shuts Down Shanghai IoT & AI Lab Amidst Growing Tensions

Microsoft has quietly closed its Internet of Things (IoT) and Artificial Intelligence (AI) Insider Lab in Shanghai's Zhangjiang Hi-Tech Park, marking another step back from China amid rising geopolitical tensions. Opened in 2019 to support domestic development of IoT and AI technologies, the lab was reportedly shut down earlier this year, with equipment removed and the logo gone. The closure highlights the increasing challenges faced by tech companies operating in the complex Chinese environment.

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(www.scmp.com)
Tech China withdrawal geopolitical tensions

Level Up Your Text Game: The Ultimate Font Generator

2025-03-14
Level Up Your Text Game: The Ultimate Font Generator

Font Generator is an online tool transforming plain text into over 180 stylish fonts. Using thousands of Unicode symbols, it creates bold, underlined, cursive, and italic styles – perfect for platforms lacking native formatting. Simply input your text, choose a font, copy, and paste. From social media posts to documents, this tool adds flair and personality to your writing.

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(fontgenerator.cool)
Design font generator

China's Diaspora: A Network of Unconventional Spies

2024-12-29
China's Diaspora: A Network of Unconventional Spies

The US is hunting for unconventional spies, many of whom are members of the Chinese diaspora. The case of Tang Yuanjun, a Chinese dissident who fled to Taiwan after the Tiananmen Square protests and later sought asylum in America, highlights this issue. Despite his pro-democracy activism in New York, Tang was arrested for providing information to the Chinese government, hoping to secure permission to return home to see his ailing parents. This story illustrates the complex and risky nature of China's use of its diaspora for intelligence gathering.

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(www.economist.com)
Misc Chinese spies diaspora US counterintelligence

Qualcomm NR-U: Unleashing the Full Potential of 5G

2025-01-04
Qualcomm NR-U: Unleashing the Full Potential of 5G

Qualcomm has unveiled its latest 5G NR-U technology, designed to significantly boost 5G network coverage and capacity by leveraging unlicensed spectrum. This innovative technology cleverly combines licensed and unlicensed spectrum, enabling operators to expand their 5G networks, providing faster and more reliable connectivity to a greater number of users. This is particularly significant for deploying 5G in densely populated areas or remote locations, effectively addressing network congestion and reducing deployment costs. NR-U is poised to be a key driver in 5G evolution, paving the way for a wider range of 5G applications in the future.

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(www.qualcomm.com)
Tech

AI-Powered Lip-Sync Tech Brings Swedish Sci-Fi Film to American Theaters

2025-03-25
AI-Powered Lip-Sync Tech Brings Swedish Sci-Fi Film to American Theaters

The Swedish sci-fi film "Watch the Skies" (originally titled "UFO Sweden") will hit American AMC theaters on May 9th. Using Flawless AI's TrueSync technology, the film underwent "visual dubbing," seamlessly matching actors' lip movements to English audio without reshoots. This lowers the barrier to entry for foreign films, potentially attracting a wider audience. The technology is SAG-AFTRA compliant and promises to revolutionize global film distribution. The film, about a teenager searching for her father, believed abducted by aliens, will screen in 100 AMC locations across the US.

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(www.engadget.com)
Tech

Porn Sites Use SVG Files to Spread Malicious Script, Hijacking Facebook Likes

2025-08-10
Porn Sites Use SVG Files to Spread Malicious Script, Hijacking Facebook Likes

Security researchers have discovered multiple pornographic websites built on WordPress that use SVG files to spread malicious JavaScript code. This obfuscated code ultimately downloads a malicious script called Trojan.JS.Likejack, which silently likes specified Facebook posts if the user is logged in. This isn't a new tactic; previous incidents involved SVGs in cross-site scripting attacks and phishing scams. Researchers have identified dozens of affected websites. While Facebook shuts down accounts involved, these offenders consistently return with new profiles.

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(arstechnica.com)
Tech
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