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Denmark Deploys AI-Powered Sailboats for Baltic Sea Surveillance

2025-06-16

Denmark Deploys AI-Powered Sailboats for Baltic Sea Surveillance

Amid rising tensions in the Baltic Sea, the Danish Navy has initiated a three-month trial deploying four unmanned sailboats, dubbed 'Voyagers,' for maritime surveillance. These autonomous vessels, built by Saildrone, utilize wind and solar power and are equipped with advanced sensors, enabling months-long autonomous operations to monitor underwater infrastructure and combat illicit activities. The initiative aims to bolster Danish and NATO surveillance capabilities in the Baltic and North Seas, addressing threats such as undersea cable damage and smuggling, as part of a layered maritime monitoring system.

(apnews.com)

Tech unmanned sailboats maritime surveillance

arXivLabs: Community Collaboration on arXiv Features

2025-05-16

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

(arxiv.org)

Development

Breaking Change: List API Filter Overhaul with Nested Expressions

2025-05-25

Breaking Change: List API Filter Overhaul with Nested Expressions

The List API has undergone a significant update, now supporting nested and complex filter expressions. This is a breaking change requiring users to update their client libraries. All clients have been updated to support the new syntax and assist in constructing nested filters. For raw HTTP users, the filter format changed from col[ne]=val to filter[col][$ne]=val, following QS conventions. For example, excluding a value range [v_min, v_max]: ?filter[$or][0][col][$gt]=v_max&filter[$or][1][col][$lt]=v_min. A new Swift client implementation has been added. The release version is now shown in the admin dashboard with a link to the release page. Dependencies have also been updated.

(github.com)

Development API Update Filters Nested Expressions

F-35 Crash: 50-Minute Airborne Conference Call Couldn't Save $200M Fighter Jet

2025-08-27

F-35 Crash: 50-Minute Airborne Conference Call Couldn't Save $200M Fighter Jet

An F-35 fighter jet crashed in Alaska due to ice in the landing gear preventing proper deployment. The pilot spent 50 minutes on a conference call with Lockheed Martin engineers trying to troubleshoot the issue before ejecting. The investigation revealed significant water contamination in the aircraft's hydraulic system and a failure to heed warnings about sensor issues in extreme cold, leading to flawed decision-making and the loss of the $200 million aircraft.

(www.cnn.com)

Tech fighter jet crash

Proving Memoization Correctness in Lean: A Case Study

2025-06-20

Proving Memoization Correctness in Lean: A Case Study

This blog post demonstrates how to solve a dynamic programming problem using memoization in the Lean theorem prover and formally verify its correctness. The author tackles the Bytelandian Gold Coins problem, initially presenting a memoized solution using a HashMap. The difficulty of directly proving its correctness is highlighted due to challenges in reasoning about data structure invariants. The solution leverages subtypes and dependent pairs to create a `PropMap`, a memoization table that stores not only computed values but also proofs of their correctness. The algorithm's correctness is then proven incrementally within the recursive implementation itself, culminating in a trivial top-level proof. This approach elegantly intertwines code and proof, showcasing a powerful technique for formally verifying dynamic programming algorithms.

(tannerduve.github.io)

Development dynamic programming

Simple Exercise Eliminates Gastroesophageal Reflux: A Case Report

2024-12-28

This case report describes a novel exercise to strengthen the lower esophageal sphincter (LES) and eliminate gastroesophageal reflux. The exercise involves eating while kneeling with the head lower than the stomach, using gravity as resistance. After several months of daily practice, the author's reflux symptoms ceased and haven't returned. This simple, low-risk exercise offers a potential solution for some individuals suffering from GERD.

(pmc.ncbi.nlm.nih.gov)

Misc gastroesophageal reflux lower esophageal sphincter exercise therapy

Hacker News: Inside the Operations of a Prolific Voice Phishing Crew

2025-01-08

A KrebsOnSecurity article exposes the inner workings of a prolific voice phishing gang. The group abuses legitimate Apple and Google services, using spoofed phone numbers, phishing emails, and system messages to defraud victims. They even leverage an official Apple support line to send confirmation messages, building trust. The gang has a clear division of labor, including callers, operators, drainers, and owners. The article reveals how they use data breaches and automated tools to target victims, and details internal conflicts and betrayals. The incident highlights the importance of cybersecurity and exposes the complex operation of cybercrime groups.

(krebsonsecurity.com)

Tech voice phishing

The Surprisingly Colorful World of 1888 Ostrich Feather Dyeing

2025-05-10

The Surprisingly Colorful World of 1888 Ostrich Feather Dyeing

Alexander Paul's *The Practical Ostrich Feather Dyer* (1888) is a surprisingly vibrant volume. Interspersed with detailed instructions and color adjustments, are 48 stunning examples of dyed ostrich feathers, showcasing a remarkable range of hues – from lemon yellow to deep browns. Paul's confidence in his methods is evident; he offers a $1000 reward to anyone who can disprove his instructions. This book isn't just a technical manual; it's a testament to meticulous craftsmanship, precision, and an egalitarian entrepreneurial spirit.

(publicdomainreview.org)

Design dyeing techniques ostrich feathers 19th-century crafts

Designing Delightful Apps for Kids: Lessons from Kidz Fun Art

2025-07-29

Designing Delightful Apps for Kids: Lessons from Kidz Fun Art

This article details the lessons learned over four years developing Kidz Fun Art, a tablet-optimized drawing app for children. The author highlights unique challenges and solutions for designing child-friendly apps, including minimizing text, co-locating tools with objects, simplifying interactions, easy error correction, knowing when to involve adults, reducing the need for fine motor skills, addressing palm rejection, and incorporating delightful design elements. The author also stresses ethical monetization strategies, privacy concerns, and preventing children from directly spending money.

(shaneosullivan.wordpress.com)

Development Child App Design

FFmpeg Assembly Language School: Learn to Contribute!

2025-08-18

FFmpeg Assembly Language School: Learn to Contribute!

Embark on an exciting journey into FFmpeg assembly language programming! This course requires C programming knowledge (especially pointers) and high school math. Lessons and assignments (coming soon) will equip you to contribute to the FFmpeg project. A Discord server is available for support: https://discord.com/invite/Ks5MhUhqfB

(github.com)

Development

Resurfaced: Niklaus Wirth's Modula-2 Compiler Source Code

2025-05-04

The source code for Niklaus Wirth's influential Modula-2 compiler, including compilers, operating systems, and related tools for the Lilith workstation and its adaptation for the IBM-PC (M2M-PC), has been made publicly available. These long-lost codes, including multiple versions from early multi-pass to later single-pass compilers and a Macintosh port, were rediscovered by Jos Dreesen, creator of the Lilith emulator EmuLith. This release offers a valuable glimpse into compiler design history and a rich learning resource for developers.

(astrobe.com)

Development

Aeron: Blazing Fast Messaging for High-Performance Systems

2025-07-13

Aeron: Blazing Fast Messaging for High-Performance Systems

Aeron is a high-performance, low-latency messaging system supporting UDP unicast, multicast, and IPC. It offers Java, C, C++, and .NET clients, enabling efficient message exchange across machines or via IPC. Aeron boasts exceptional throughput and predictable low latency, leveraging Simple Binary Encoding (SBE) for optimized message handling. Features include Aeron Archive for persistent message storage and Aeron Cluster for fault-tolerant services. Owned and operated by Adaptive Financial Consulting, Aeron also provides premium services including training, consulting, and performance enhancements like kernel bypass and high-speed encryption. Ideal for building high-frequency trading systems and other demanding applications.

(github.com)

Development low-latency messaging

Bypassing Malware VM Detection: Spoofing a CPU Fan via Custom SMBIOS

2025-06-30

Malware often checks for the absence of hardware components typically not emulated in virtual machines (like a CPU fan) to evade analysis. This post details how to bypass this detection by modifying the virtual machine's SMBIOS data to spoof a CPU fan. The author thoroughly explains the steps for Xen and QEMU/KVM environments, including obtaining SMBIOS data, creating a custom SMBIOS file, and configuring the VM. The post also highlights the need to additionally handle SMBIOS Type 28 (temperature probe) data in Xen for successful WMI deception.

(wbenny.github.io)

Development

PgDog: A High-Performance PostgreSQL Transaction Pool and Logical Replication Manager

2025-05-26

PgDog: A High-Performance PostgreSQL Transaction Pool and Logical Replication Manager

PgDog, written in Rust, is a fast, secure, and scalable transaction pooler and logical replication manager for PostgreSQL, capable of handling hundreds of databases and hundreds of thousands of connections. It features database sharding, load balancing with health checks and failover, transaction and session pooling for efficient client connection management. Monitoring is facilitated by OpenMetrics, and it includes a CSV parser and logical replication support for streamlined data ingestion and database sharding.

(github.com)

Development Database Sharding

Indie Dev Uses C for a 2025 Commercial Game: A Postmortem

2025-01-20

Cowleyfornia Studios released their train management game, *Iron Roads*, in 2025, surprisingly written in pure C (C99) instead of C++. The choice stemmed from a desire for portability, simplicity, and most importantly, code clarity to manage memory allocation and performance. Prototypes in Haskell, Go, and Rust were explored, but ultimately C (approx. 40,000 lines of code) and Lua (approx. 8,000 lines for higher-level logic) were chosen. The developer found C's fast compilation and ease of optimization beneficial to the workflow, but admitted to challenges with serialization and boilerplate. While happy with the outcome, they are unlikely to repeat the process, leaning towards modern, higher-level languages that compile to C, like Nim, for future projects.

(www.cowleyforniastudios.com)

Game

Bonobos Show They Understand Ignorance: A Breakthrough in Theory of Mind Research

2025-02-04

Bonobos Show They Understand Ignorance: A Breakthrough in Theory of Mind Research

A new study demonstrates that bonobos possess theory of mind, understanding others' lack of knowledge and acting accordingly. Researchers designed an experiment where bonobos helped an experimenter find hidden treats. Results showed bonobos pointed faster and more often when they realized the experimenter didn't know the treat's location. This indicates bonobos track and respond to differing perspectives, suggesting theory of mind might be more evolutionarily ancient than previously thought, and potentially present in our common ancestor.

(www.newscientist.com)

AI Theory of Mind Bonobos

DEF CON: Hackers, the Military, and a Jello Shot Showdown

2025-08-13

DEF CON: Hackers, the Military, and a Jello Shot Showdown

This year's DEF CON, the world's largest hacker conference, showcased a stark contradiction: close collaboration with the US military and intelligence agencies alongside sharp criticism of US military actions. Former NSA director Paul Nakasone's presence, alongside founder Jeff Moss, culminated in a dramatic ejection of hacktivist Jeremy Hammond, who shouted “Free Palestine!” and condemned Nakasone as a war criminal. This incident highlighted DEF CON's complex relationship with the military, featuring military-sponsored events and competitions alongside presentations exposing US war crimes (like Micah Lee's exposé on Signalgate and the Yemen bombing) and security vulnerabilities. The event underscored the ongoing tension between the countercultural hacker ethos and the increasingly close ties between the hacking community and the US military-industrial complex.

(jackpoulson.substack.com)

Tech military collaboration

Albania's 750,000 Bunkers: A Cold War Relic

2025-01-20

Albania's 750,000 Bunkers: A Cold War Relic

Driven by paranoia of external invasion under Enver Hoxha's rule, the People's Socialist Republic of Albania built over 750,000 bunkers, averaging 5.7 per square kilometer. These bunkers, scattered across the country, are a unique landscape feature reflecting Hoxha's totalitarian regime and its impact on Albanian society and economy. Never used in combat, the bunkers drained significant resources, hindering development. Today, they serve as unusual tourist attractions and repurposed dwellings.

(en.wikipedia.org)

Tech Albania Bunkers

Truchet Tiles: Simple Geometry, Infinite Possibilities

2025-07-29

Truchet tiles, simple square tiles with non-rotationally symmetric patterns, create surprisingly complex and captivating visual effects. First described in 1704 by Sébastien Truchet, they're now widely used in information visualization and graphic design. By varying the tile orientations, diverse patterns emerge, even creating labyrinths. Their elegant simplicity extends to programming; a single line of code can generate endless variations, highlighting the beauty of concise algorithms and infinite possibilities. This makes them a prime example of generative art.

(en.wikipedia.org)

Design geometric patterns

Claude vs. ChatGPT: A Tale of Two Memory Systems

2025-09-12

Claude vs. ChatGPT: A Tale of Two Memory Systems

This post compares the drastically different memory systems of Claude and ChatGPT, two leading AI assistants. Claude starts each conversation with a blank slate, searching conversation history only when explicitly invoked using `conversation_search` and `recent_chats` tools for keyword and time-based retrieval, offering a powerful tool for professionals. In contrast, ChatGPT, designed for a mass market, automatically loads memory components, building user profiles and providing instant personalization. These design choices reflect the different target audiences (professionals vs. general users) and product philosophies (professional tool vs. consumer product), highlighting the vast design space and future directions of AI memory systems.

(www.shloked.com)

AI AI memory systems

dk coder: Empowering Non-Programmers to Build Secure Apps

2025-06-16

dk coder: Empowering Non-Programmers to Build Secure Apps

The dk coder is a script runner and cross-compiler designed for users with limited programming experience to build substantial, safety-focused applications. Its ease of use, portability, and IDE support tackles the 'README-itis' problem: lengthy READMEs deter users from installing, resulting in lost users. A Quick Walkthrough Guide introduces dk scripts with simple examples. Developers should consult the dk Runtime for supported Windows, macOS, and Linux versions. For scripting, refer to dk Parties for project organization and keep the dk Libraries and dk Macros manuals handy. Experienced OCaml users should check out the Coming From OCaml guide.

(diskuv.com)

Development script runner cross-compiler ease of use

Snake in tmux: A Game Built Entirely in Config Files

2025-03-29

Snake in tmux: A Game Built Entirely in Config Files

A developer, known for their tmux wizardry, has created a fully functional Snake game using only tmux configuration files. No external programs are needed; the game's logic, rendering, and input are all handled within the tmux environment. The author leverages tmux sessions, windows, and styling to build the game, creating a surprisingly elegant and functional implementation. Details include recursive window creation, clever input handling, and a concise game loop, showcasing the surprising power and flexibility of tmux.

(willhbr.net)

Game

Guile Hoot 0.2.0: Building Interactive Web Pages in Scheme

2025-05-28

Guile Hoot 0.2.0, a Scheme to WebAssembly GC compiler, has been released. This release introduces a Foreign Function Interface (FFI), enabling developers to write the majority of web application code directly in Scheme, minimizing reliance on JavaScript. The article demonstrates building interactive web pages using Scheme and the FFI, progressing from a simple "Hello, world!" to an interactive counter and finally a to-do list application. Leveraging Scheme's symbolic manipulation capabilities and SXML, it builds an efficient virtual DOM with a React-like diffing algorithm for updates.

(spritely.institute)

Development

Heatproof Magnetism: A Surprising Discovery Defies Expectations

2025-01-19

Heatproof Magnetism: A Surprising Discovery Defies Expectations

High temperatures are known to disrupt order and patterns. However, physicists have theoretically demonstrated a type of idealized magnetism that maintains its orderly structure regardless of temperature. This surprising discovery stems from a simple question posed at a lecture, leading to a deeper exploration of quantum field theory. Researchers found that in a system resembling two intertwined magnetic grids, a specific magnetic order persists even at infinitely high temperatures. The freely spinning magnetic vectors stabilize the up-down aligned vectors, maintaining overall magnetic order. This finding could have implications for cosmology and the quest to achieve room-temperature quantum phenomena.

(www.quantamagazine.org)

Physics magnetism high temperature

Simulating the Hand-Drawn 'Boiling' Effect with SVG Filters

2025-07-21

Simulating the Hand-Drawn 'Boiling' Effect with SVG Filters

This article details a method for simulating the 'boiling' effect, a common visual style in hand-drawn animation, using SVG filters. This effect creates the illusion of subtle movement by applying slight distortions to image edges. The author explains how to use the feTurbulence and feDisplacementMap filters to generate a noise texture and apply it to an image, and how to animate filter parameters with JavaScript to achieve the boiling effect. Interactive demos allow users to adjust parameters and observe the effect's changes. The author successfully uses simple SVG filters and JavaScript to simulate a realistic hand-drawn animation effect on the web.

(camillovisini.com)

Development

DuckDB Preview: Seamlessly Connect to Amazon S3 Tables and SageMaker Lakehouse

2025-03-18

DuckDB Preview: Seamlessly Connect to Amazon S3 Tables and SageMaker Lakehouse

DuckDB announces a preview feature adding support for Apache Iceberg REST Catalogs, enabling easy connection to Amazon S3 Tables and Amazon SageMaker Lakehouse. This collaboration between AWS and DuckDB Labs allows users to query Iceberg tables directly. By installing the latest DuckDB and necessary extensions, configuring AWS credentials, and using simple commands, users can access and query data, even with schema evolution. This preview release paves the way for a stable release later this year.

(duckdb.org)

Development

OpenAI Wins Partial Victory in Copyright Lawsuit Against NYT

2025-04-05

OpenAI Wins Partial Victory in Copyright Lawsuit Against NYT

The New York Times sued OpenAI for copyright infringement, alleging ChatGPT's unauthorized use of its content. A judge dismissed some claims, including those of 'free-riding' and removal of copyright management information, but upheld others, finding that OpenAI had at least reason to investigate and uncover end-user infringement. OpenAI argued its AI training is fair use and highlighted ChatGPT's benefits. The ruling is likely disappointing for news publishers, but a partial win for OpenAI.

(arstechnica.com)

Tech fair use

YouTube Channel Deleted: Indie Dev Hit by Algorithmic Misfire

2025-02-03

YouTube Channel Deleted: Indie Dev Hit by Algorithmic Misfire

Indie developer Sinevibes' YouTube channel was deleted due to alleged violations of "spam and deceptive policies." Sinevibes claims they only posted demos of their own original products and are baffled by the deletion. This incident highlights the impact of algorithmic misjudgments on content creators and sparks debate about platform moderation practices.

(bsky.app)

Development

From Euler Angles to Quaternions: An Elegant Representation of 3D Rotations

2025-02-26

From Euler Angles to Quaternions: An Elegant Representation of 3D Rotations

This article delves into the representation of 3D rotations. Starting with the common Euler angles, it reveals the problem of gimbal lock. It then introduces Rodrigues vectors and explains their discontinuities in representing rotations. Through analogy with lower-dimensional spaces, the article cleverly shows how to map a spherical space with antipodal point equivalence to a 4D hypersphere, ultimately introducing quaternions as a continuous and efficient representation of 3D rotations. The article also explores the application and limitations of four-axis gimbals, explaining that even adding redundant axes cannot completely avoid singularities.

(jasonfantl.com)

Development 3D rotation Euler angles

Synology DS923+ vs. Home-Built FreeBSD NAS: A Head-to-Head Comparison

2024-12-19

Synology DS923+ vs. Home-Built FreeBSD NAS: A Head-to-Head Comparison

Julio Merino compares a Synology DS923+ against his home-built NAS running FreeBSD 14 with ZFS. His custom NAS utilizes a powerful ThinkStation workstation with ample CPU and RAM, while the DS923+ is a compact, dedicated NAS appliance with Synology's DSM and btrfs. Both offer comparable IOPS and network performance, but the DS923+ excels in noise and power consumption. DSM provides a user-friendly experience and robust backup solutions, while FreeBSD/ZFS requires more manual configuration and maintenance. Ultimately, the author prefers the DS923+ for its increased peace of mind regarding data security and management.

(blogsystem5.substack.com)

Hardware

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