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Improved CIELAB Color Quantization with the HyAB Distance Formula

2025-07-10

This article explores an improved CIELAB color quantization method using a novel distance formula called HyAB, replacing the traditional Euclidean distance. HyAB uses absolute difference for lightness and Euclidean distance for chromaticity, showing better alignment with human perception in experiments. The author applies it to the k-means algorithm, further optimizing results by replacing the mean calculation of the L component with the median. While HyAB can improve image quality in some cases, the author notes that overall system design and post-processing techniques like dithering have a greater impact on the final outcome.

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(30fps.net)
Development

Branch Prediction: A Key to CPU Performance Optimization

2025-07-10
Branch Prediction: A Key to CPU Performance Optimization

Branch instructions are the core mechanism by which a CPU makes decisions in a program. This post explores the types of branch instructions (conditional/unconditional, direct/indirect), and how branch prediction affects CPU performance. While branch prediction techniques can significantly improve efficiency, frequent branches still create performance bottlenecks. The article suggests optimizing code by simplifying conditional statements, inlining functions, avoiding excessive nested calls, using indirect branches cautiously, and utilizing conditional move instructions to reduce the number of branch instructions and improve program performance.

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(chrisfeilbach.com)
Development

From Permissive to Copyleft: A Shift in Open Source Licensing

2025-07-10

The author reflects on their evolution of open-source licensing preferences, shifting from a preference for permissive licenses (like MIT) to prioritize maximal adoption to now favoring copyleft licenses (like GPL). This change stems from three key factors: open source has gone mainstream, making enterprise adoption easier; the crypto space has become more competitive and mercenary, making 'friendly' sharing insufficient; and Glen Weyl's economic arguments suggesting that actively promoting open source is optimal with increasing returns to scale. The author argues that copyleft, by mandating source code sharing of derivative works, effectively promotes knowledge diffusion and technological sharing, preventing resource monopolization by a few.

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(vitalik.eth.limo)
Development copyleft

Petrichor: A macOS Offline Music Player Built with Swift and SwiftUI

2025-07-10
Petrichor: A macOS Offline Music Player Built with Swift and SwiftUI

Petrichor is a powerful offline music player for macOS offering all the features you'd expect: organized library browsing, interactive playlist and queue management, folder view browsing, quick access to favorites in the sidebar, easy navigation, native macOS integration (menubar and dock controls, dark mode support), powerful search, and smart playlists. Created by a developer who missed the features of Swinsian and wanted to learn Swift and macOS app development, it's built entirely with Swift and SwiftUI and uses a SQLite database to manage music file information.

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(github.com)
Development

Flexible Split Horizon DNS with Tailscale and Pi-hole

2025-07-10
Flexible Split Horizon DNS with Tailscale and Pi-hole

This post details configuring Pi-hole to achieve split horizon DNS using Tailscale. The author uses Tailscale's mesh network to provide different DNS resolutions for LAN and Tailscale clients. This solves access problems caused by services lacking secondary authentication and geo-blocking. The process involved troubleshooting Docker networking and Pi-hole interface binding, ultimately resolved by using host networking and adjusting Pi-hole settings. The solution enhances security and simplifies network management.

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(www.bentasker.co.uk)
Development

Optimizing the Separating Axis Theorem with Gauss Map Traversal

2025-07-10
Optimizing the Separating Axis Theorem with Gauss Map Traversal

This article presents an optimized collision detection algorithm for convex polyhedra. Reframing the Separating Axis Theorem (SAT) as a sphere-based optimization problem, the author reveals that the minimum lies at the intersections of great circles on a Gauss map. A graph traversal algorithm avoids repeated support function calculations, requiring only one full evaluation initially. The algorithm then efficiently updates the support point by traversing the Gauss map, resulting in significant performance gains. Tests show a 5-10x speedup over traditional SAT.

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(cairno.substack.com)
Development collision detection separating axis theorem Gauss map

AI Code: From Vibrators to Pacemakers – How Far Can Our Trust in Code Go?

2025-07-10

The author uses the code of a vibrator and a pacemaker as examples to discuss the issue of code security and trust in the age of AI. The simple vibrator program and the complex pacemaker program are surprisingly similar in structure, but the latter concerns life safety and requires strict review and certification. The author questions whether, even if AI can write better code than humans in the future, we can fully trust AI-generated code, especially for programs related to life safety, such as a car's braking system. The author argues that radical transparency, including open code, specifications, and processes, is key to building trust, but the correctness of the code alone is not enough; comprehensive system understanding and security measures are also needed.

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(punkx.org)
Tech code trust medical devices

Go Generics: The Clever Use of Generic Interfaces for Efficient and Adaptive Tree Structures

2025-07-10

This article explores advanced usage of Go's generic interfaces, particularly how to elegantly handle type constraints when building data structures like binary search trees using self-referential generic interfaces. Using a tree structure as an example, it compares three implementation approaches: using `cmp.Ordered`, a custom comparison function, and a self-referential generic interface. Finally, the article delves into combining `comparable` constraints to build ordered sets and avoiding complexities arising from pointer receivers, recommending prioritizing simplicity and readability in design.

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(go.dev)
Development Go Generics

Clojure Code Snippet: Creating a Movie Genre Index

2025-07-10
Clojure Code Snippet: Creating a Movie Genre Index

This Clojure code snippet elegantly creates a movie genre index. Starting with a map containing movie information (title, genres, and Rotten Tomatoes score), it uses the `reduce` and `zipmap` functions to categorize movies by genre, ultimately producing a map where keys are genres and values are lists of movies belonging to that genre. This index facilitates looking up movies by genre and sorting them by rating. For example, it easily allows finding all thriller movies and sorting them by their Rotten Tomatoes score. The code is concise and efficient, showcasing the elegance of functional programming.

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(jank-lang.org)
Development

Anna's Archive MCP Server: Search and Download Documents

2025-07-10
Anna's Archive MCP Server: Search and Download Documents

This is an MCP server for searching and downloading documents from Anna's Archive. It allows searching for documents matching specified terms and downloading specific documents previously returned by the search tool. The software explicitly disclaims endorsement of unauthorized acquisition of copyrighted material and should be considered solely a utility. Users are urged to respect intellectual property rights. Requires two environment variables: ANNAS_SECRET_KEY (API key) and ANNAS_DOWNLOAD_PATH (download path).

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(github.com)
Development document search document download

The Unexpected Rise of the German Research University

2025-07-10

This article explores the astonishing transformation of German universities from backward institutions in the 18th century to leading research powerhouses in the 19th. Initially hampered by medieval structures and a lack of research focus, reforms at Göttingen, emphasizing publication records and reputation, laid the groundwork. The Romantic movement further fueled change, prioritizing holistic knowledge and research. This culminated in the Berlin model, a research university integrating teaching and research, cultivating students' learning and critical thinking, profoundly shaping global higher education.

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(asteriskmag.com)
Tech Academic History German Universities

Flopper Ziro: A Cheap, Open-Source Flipper Zero Clone

2025-07-10
Flopper Ziro: A Cheap, Open-Source Flipper Zero Clone

Flopper Ziro is a cheap, DIY, and fully open-source Flipper Zero clone built using the Arduino IDE. While not a professional device, it aims to replicate core Flipper Zero functionalities like RubberDucky, RFID/NFC (work in progress), IR, and RF. Programmable via Arduino IDE, it allows saving/loading data from an SD card. The project is under development, with plans to improve SD card functionality, finish RF scanning and sending, and add more RFID/NFC capabilities.

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(github.com)
Hardware Flipper Zero clone

DCHP-3 Update: A Deeper Dive into Canadian English

2025-07-10

The Dictionary of Canadianisms on Historical Principles (DCHP-3) has been significantly updated, offering a refined typology and frequency analysis of Canadian English vocabulary. It categorizes words based on origin, semantic shifts, and frequency, presenting six distinct types of Canadianisms. Each entry details meanings, citations, and frequency charts, providing a comprehensive resource for scholars and enthusiasts alike. This update adds numerous entries and expands on existing ones, enriching our understanding of the evolution of Canadian English.

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(dchp.arts.ubc.ca)
Misc Canadian English lexicography

Biomni: A Game-Changing Biomedical AI Agent

2025-07-10
Biomni: A Game-Changing Biomedical AI Agent

Biomni is a game-changing general-purpose biomedical AI agent capable of autonomously conducting a wide array of research tasks across various biomedical subfields. By integrating cutting-edge LLMs, retrieval-augmented planning, and code-based execution, Biomni significantly boosts research productivity and facilitates the generation of testable hypotheses. The open-source project actively solicits community contributions—new tools, datasets, software, benchmarks, and tutorials—to build Biomni-E2, a next-generation environment. Significant contributors will be recognized with co-authorship on publications in top-tier journals or conferences.

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(github.com)
AI Biomedical AI

Website Display Error Due to Disabled JavaScript

2025-07-10
Website Display Error Due to Disabled JavaScript

When visiting a website, a message appeared: "JavaScript has been disabled in your browser." This resulted in an abnormal display, showing only basic elements like navigation, search, content, footer, and contact information. The website relies on JavaScript for rendering and functionality. Enabling JavaScript in browser settings is recommended for a complete website experience.

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(plf.inf.ethz.ch)
Development

Ikea Bets Big on Matter: A New Era for Smart Home

2025-07-09
Ikea Bets Big on Matter: A New Era for Smart Home

Ikea is relaunching its smart home line, embracing the Matter standard to make its affordable products compatible with other brands, with or without Ikea's own hub. Starting in January, over 20 new Matter-over-Thread smart lights, sensors, and remotes will launch, with more to come. Simultaneously, Ikea is rebooting its audio offerings with a new line of inexpensive Bluetooth speakers. This push aims for a simple, affordable smart home experience, leveraging its learnings from Zigbee and its involvement in developing the Matter standard. An update to the Dirigera hub makes it a Matter controller and Thread border router, enabling interoperability with other brands and paving the way for a more open smart home ecosystem.

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(www.theverge.com)
Tech Ikea

LLMs Struggle with Right-to-Left Code: The Case of q/kdb+

2025-07-09
LLMs Struggle with Right-to-Left Code: The Case of q/kdb+

Large language models (LLMs) face challenges when writing code in q/kdb+, a language with a right-to-left, no-operator-precedence evaluation order. The author demonstrates that LLMs struggle to generate correct code adhering to these rules, often mixing Python and q syntax. The article explores why LLMs find right-to-left coding difficult and proposes Qython as a solution. Qython is a Python-like language that compiles to q, leveraging LLMs' Python expertise to circumvent the difficulties of q's unique syntax. A practical example showcases Qython's effectiveness.

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(medium.com)
Development

Ruby 3.4: Gradual Transition to Frozen String Literals

2025-07-09
Ruby 3.4: Gradual Transition to Frozen String Literals

Ruby 3.4 initiates a multi-version transition towards frozen string literals by default. Currently, Ruby 3.4 offers opt-in warnings when deprecation warnings are enabled, ensuring backward compatibility. Warnings will be enabled by default in Ruby 3.7, with frozen string literals becoming the default in Ruby 4.0. This change promises performance gains through string deduplication, reducing garbage collection and memory usage. The article details how to enable warnings, fix issues, and migrate existing code, advocating a phased upgrade approach.

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(www.prateekcodes.dev)
Development Strings

UK Police to Spend $102M Digitizing VHS Archives

2025-07-09
UK Police to Spend $102M Digitizing VHS Archives

The UK police service is undertaking a massive project to digitize its VHS archives, with a budget of up to £75 million ($102 million). This involves procuring either in-house technology or outsourcing the conversion of these outdated tapes to digital format. The initiative covers a range of media, including VHS, microfiche, CDs, and DVDs, highlighting the ongoing efforts (and occasional reluctance) of the UK public sector to modernize its aging technologies.

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(www.theregister.com)
Tech digitization UK Police

rtrvr.ai v12.5: On-the-Fly Tool Generation Redefines AI Agent Tool Integration

2025-07-09
rtrvr.ai v12.5: On-the-Fly Tool Generation Redefines AI Agent Tool Integration

rtrvr.ai v12.5 introduces 'On-the-Fly Tool Generation' (ToolGen), revolutionizing AI agent tool integration. Previously, agents relied on pre-configured tool lists like MCP protocols, making configuration cumbersome and inflexible. ToolGen allows agents to directly extract information from the browser (e.g., API keys) and generate the necessary tools on demand. For example, it can grab an access token from a HubSpot developer page and generate a tool to upload contacts. This significantly improves efficiency and flexibility, eliminating the need for manual configuration of complex tool lists. To celebrate this breakthrough, rtrvr.ai is offering a generous credit update with free BYOK (Bring Your Own Key), referral bonuses, and free credits for all users.

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(www.rtrvr.ai)
AI tool generation

From AI Agents to AI Agencies: A Paradigm Shift in Task Execution

2025-07-09
From AI Agents to AI Agencies: A Paradigm Shift in Task Execution

Two years ago, the transformative potential of AI Agents – autonomous systems capable of breaking down and executing complex tasks – was highlighted. Now, AI Agents autonomously code websites, manage digital workflows, and execute multi-step processes. However, a new architectural pattern, termed 'AI Agencies', is emerging, representing a fundamental leap beyond current AI Agents. Unlike multiple AI Agents collaborating, an AI Agency is a unified system dynamically orchestrating diverse intelligence types to handle different parts of a single task. For example, a high-capability reasoning model plans the task, a fast, efficient model generates boilerplate code, and a debugging-focused model ensures functionality. This shifts AI task execution from monolithic to orchestrated intelligence, improving efficiency, cost-effectiveness, and quality.

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(blog.nishantsoni.com)
AI AI Agencies Task Execution

Major Security Flaw: eSIM Cards Compromised, Millions of Users at Risk

2025-07-09

Security Explorations, a research lab of AG Security Research, has uncovered a critical vulnerability in eSIM technology. They successfully compromised a Kigen eUICC card, extracting the private key for the GSMA consumer certificate. This allows attackers to download arbitrary eSIM profiles from mobile network operators, gaining access to sensitive user data and network keys. The vulnerability exploits previously known Java Card flaws from 2019, proving eSIMs are not as secure as advertised. Millions of users relying on Kigen eSIMs are at risk, highlighting a significant weakness in eSIM architecture.

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(security-explorations.com)
Tech eSIM security Java Card vulnerabilities

Astro: A Content-First Web Framework That Redefines Speed

2025-07-09
Astro: A Content-First Web Framework That Redefines Speed

Astro, launched in 2021, is a game-changer in web frameworks. It prioritizes content and server-side rendering, shipping zero JavaScript by default for blazing-fast load times. Its unique 'Island Architecture' loads JavaScript only for interactive components, leaving the rest as static HTML. This results in significantly faster sites, improving SEO and user experience. It's incredibly versatile, letting you integrate React, Vue, or other frameworks seamlessly. If you're building content-heavy sites, Astro offers a compelling alternative, prioritizing speed and developer happiness.

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(websmith.studio)
Development web framework

API Platform Conference 2025: AI-Powered API Development Takes Center Stage

2025-07-09
API Platform Conference 2025: AI-Powered API Development Takes Center Stage

The API Platform Conference returns September 18th-19th, 2025, in Lille, France, and online! This two-day event showcases the latest trends, best practices, and case studies in API Platform and its ecosystem (PHP, Symfony, JavaScript, AI, FrankenPHP, performance, tools). Nearly 30 talks in English and French make it a must-attend for innovative companies, project leaders, and skilled developers. Developers, CTOs, and decision-makers specializing in these technologies are especially encouraged to attend. The call for papers is open until March 23rd, with final speakers announced from May 14th. Submit your pitch and be part of this special anniversary edition!

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(www.php.net)
Development

SUSE Launches Sovereign Premium Support to Address EU Data Sovereignty Concerns

2025-07-09
SUSE Launches Sovereign Premium Support to Address EU Data Sovereignty Concerns

Amidst growing wariness of US government and tech giants, the EU is seeing a surge in open-source and Linux adoption. To address data sovereignty issues, European open-source leader SUSE has launched its Sovereign Premium Support package. This service ensures all support personnel and data reside within the EU, with strict access control and encryption of customer data. This move caters to the increasing demand for data residency, privacy, and operational control within EU organizations, particularly in sectors like defense, government, and law enforcement. The launch comes as 2025 is projected as a 'watershed year' with increasing geopolitical and economic uncertainties pushing digital sovereignty to the forefront.

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(www.zdnet.com)
Tech

Oxford English Dictionary's AI Search Assistant (Beta)

2025-07-09

Oxford English Dictionary (OED) has launched a beta version of an AI search assistant designed to help users leverage the OED's advanced search capabilities. The assistant itself cannot answer questions or engage in conversation, but it can construct complex search queries based on user requests and provide links to the results. It can also help users find information about the OED. Example queries include: "Which words in English are borrowed from French?", "Which words were first used by Charles Dickens?", or "How are words added to the dictionary?". Synonym searches are not yet supported.

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(www.oed.com)
Tech AI search assistant Oxford English Dictionary advanced search

The Truth About REST APIs: Beyond CRUD

2025-07-09

This article delves into the essence of the REST architectural style, revealing its core principle: Hypermedia as the Engine of Application State (HATEOAS). Many so-called "RESTful APIs" merely adhere to CRUD operations, neglecting the key constraint of HATEOAS, leading to tight coupling between client and server, hindering maintainability and scalability. Through Roy Fielding's arguments and examples, the article clarifies how true REST APIs guide client interaction through hypermedia links, enabling dynamic resource discovery and state transitions, ultimately building loosely coupled, evolvable distributed systems. The article also discusses the practical trade-offs often leading to simpler, RPC-like approaches.

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(florian-kraemer.net)
Development

RN Maps Clustering: A High-Performance React Native Map Clustering Library

2025-07-09
RN Maps Clustering: A High-Performance React Native Map Clustering Library

RN Maps Clustering is a modern, performant, and fully-typed map clustering library for React Native. Built on top of supercluster, it provides a simple declarative API for adding beautiful and efficient marker clustering to your react-native-maps components. Customize cluster rendering, handle press events, and enjoy features like automatic marker spreading and high performance. It significantly improves developer efficiency.

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(github.com)
Development Map Clustering

500 Mile Email: A Curated Collection of Absurd Software Bug Stories

2025-07-09

500 Mile Email is a curated list of bizarre software bug stories, updated weekly. From database servers mysteriously timing out to Wi-Fi only working in the rain, and applications crashing after drinking Coke, these anecdotes are both hilarious and thought-provoking. The site features contributions from developers, engineers, and users worldwide, showcasing the humorous and insightful moments of software development.

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(500mile.email)
Development programming stories tech failures
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