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High-Performance RL Framework for Humanoid Robots

2025-05-18

A high-performance reinforcement learning framework optimized for training humanoid robot locomotion, manipulation, and real-world deployment is on the horizon. Boasting high versatility, it tackles tasks ranging from walking and dancing to household chores and even cooking. The upcoming K-VLA, leveraging large-scale robot data and a novel network architecture, promises the most capable and dexterous robot yet. It's locally runnable and integrates with other VLAs like Pi0.5 and Gr00t.

(www.kscale.dev)

AI

Goboscript: Text-Based Programming for Scratch

2025-05-19

Goboscript: Text-Based Programming for Scratch

Goboscript is a text-based programming language that compiles to Scratch. It lets you write Scratch projects in text and compile them into .sb3 files, usable in the Scratch editor, TurboWarp, or the Scratch website. Goboscript simplifies creating advanced Scratch projects, supporting version control, code refactoring, and reuse. It boasts a powerful macro system, local variables, and code optimization and error detection. The project was a first-place winner at FOSS HACK 25, receiving a 50,000 Rs prize.

(github.com)

Development text-based programming

Interactive Simulation of Cardiac Reentrant Arrhythmias

2025-04-01

This article uses an interactive simulation to explain the mechanism of cardiac reentrant arrhythmias. The simulation demonstrates the activation, refractory period of cardiomyocytes, and how a self-sustaining loop of activation can form, leading to arrhythmias. By changing simulation parameters, such as the refractory period and spontaneous activation rate of cardiomyocytes, different types of arrhythmias, such as atrial fibrillation and ventricular fibrillation, can be observed. This simulation helps to understand the mechanism of arrhythmias and the role of treatments such as defibrillation.

(jenevoldsen.com)

Misc cardiology arrhythmias medical simulation

Is Cursor Really That Great? A Veteran Programmer's Honest Review

2025-05-10

The author provides an in-depth comparison of the popular code completion tool Cursor with other options. They find that Cursor's core technology is not fundamentally different from Copilot, both relying on Claude or GPT models. Cursor excels in actively searching and referencing other files within a project, but it can sometimes be overly 'smart,' even creating new files without permission. The author prefers the o1 model for its more precise and reliable debugging capabilities. The article concludes that those excessively praising Cursor might lack programming experience, confusing the power of AI with the tool itself. The author stresses that choosing an editor should be based on personal preference rather than blind following of trends.

(en.smallyu.net)

Development AI tools

Reverse Engineering Anti-Cheat Updates: A Deep Dive

2025-06-30

This post details the update mechanisms of popular anti-cheat systems like EasyAntiCheat, Battleye, EA-AC, Vanguard, and EQU8. Through reverse engineering, the author meticulously analyzes their CDN structures, update package encryption, and module extraction methods, providing code examples. The article highlights the differences in update strategies and the trade-offs between security and convenience. While some information might be known, it offers a systematic analysis approach and showcases practical experience.

(not-matthias.github.io)

Tech

ROCKNIX: A Minimalist Linux Distro for Retro Gaming

2025-06-23

ROCKNIX is an immutable Linux distribution for handheld gaming devices, focusing on retro game emulation. Developed by a small community of enthusiasts, it aims to provide the features they need while having fun. It boasts integrated cross-device local and remote network play, in-game touch support on compatible devices, fine-grained battery life/performance control, music and video playback, Bluetooth audio and controller support, HDMI and USB audio/video output, device-to-device and device-to-cloud syncing (Syncthing and rclone), VPN support (Wireguard, Tailscale, ZeroTier), and built-in support for scraping and retroachievements.

(rocknix.org)

Game

Massive Solar + Storage Project Powers Up in California, Boosting LA's Clean Energy Goals

2025-08-11

Massive Solar + Storage Project Powers Up in California, Boosting LA's Clean Energy Goals

Arevon Energy's Eland Solar-plus-Storage Project in Mojave, California, is now fully operational. This massive project boasts 758 MWdc of solar capacity and 300 MW/1200 MWh of battery storage, comprising 1.36 million solar panels and 172 lithium iron phosphate batteries. Eland will power over 266,000 homes annually and provide 7% of Los Angeles's electricity needs, significantly advancing the city's goal of 100% clean energy by 2035. The project created roughly 1,000 jobs and is expected to contribute over $36 million in local government payments over its lifetime.

(electrek.co)

Tech

Revolutionizing Transparency Ordering in 3D Rendering with Precomputation

2025-05-20

Traditional 3D rendering relies on the CPU to sort translucent objects based on camera position, resulting in inefficient rendering. This post introduces a novel method for precomputing the rendering order of translucent objects. By analyzing the spatial relationship between the faces and the camera position, the algorithm pre-determines the rendering order of some faces, thereby reducing the number of runtime sorting operations. While having a time complexity of O(n²), the precomputation is performed only once, making it suitable for scenes where translucent objects don't move significantly. The algorithm works by splitting each face into two sides and leveraging their spatial relationships to determine the drawing order. In certain cases, it falls back to CPU sorting. This method significantly addresses the challenges of transparency sorting in 3D rendering and improves rendering efficiency.

(jacobdoescode.com)

Development transparency sorting

Efficient Collaborative Text Editing: A CRDT Implementation

2025-08-20

This article presents a collaborative text editing algorithm based on CRDTs, similar to approaches used in popular libraries like Yjs and Automerge. Each character is assigned a unique identifier (site ID and clock), and a tree-based index with counters orders characters. Deletion involves adding the character's identifier to a deleted set (tombstones). Efficiency is boosted by optimizations such as merging successive inserts, storing blocks contiguously, and using a range-based representation for the deleted set. This ensures efficient handling of large text pastes and simultaneous edits.

(madebyevan.com)

Development

Musk's DOGE Cuts Leave US Government Tech Efficiency in Limbo

2025-03-05

Musk's DOGE Cuts Leave US Government Tech Efficiency in Limbo

Under Elon Musk's leadership, the US Department of Government Efficiency (DOGE) has disbanded 18F, an in-house tech team focused on improving government efficiency. 18F developed digital services for tasks like passport applications and online tax filing. Its elimination risks stalling government projects and leaves a void in promoting efficient technology use within the government. Experts criticize the move as akin to 'hiring a demolition crew to build a skyscraper,' overlooking 18F's role in avoiding wasteful IT spending and facilitating technology adoption across agencies. The layoffs impacted roughly 85 employees, leaving the US government without an organization focused on government-wide technology development and implementation, negatively impacting digital transformation efforts.

(www.newscientist.com)

Tech government tech

Why Do Game Graphics Look So Bad? A Look at HDR's Failures

2025-07-25

Why Do Game Graphics Look So Bad? A Look at HDR's Failures

This article dissects the use of High Dynamic Range (HDR) in game graphics and its shortcomings. Many games, while visually impressive, lack the realism of films or photographs, exhibiting excessive contrast and unnatural color saturation. The author analyzes the issues with tone mapping functions and Look-Up Tables (LUTs) used in game engines, pointing out how their improper use leads to visual distortions. Using examples like Zelda: Breath of the Wild and Forza Horizon 3, the author shows how avoiding excessive contrast and carefully utilizing color can yield superior visual results. The solution, the author argues, needs to address both technical and artistic aspects, requiring game developers to prioritize the importance of tone mapping in visual design.

(ventspace.wordpress.com)

Game game graphics tone mapping

Samsung's Pre-installed Bloatware, AppCloud, Raises Privacy Concerns in WANA

2025-06-21

Samsung's Pre-installed Bloatware, AppCloud, Raises Privacy Concerns in WANA

Users across West Asia and North Africa are reporting a pre-installed bloatware app, AppCloud, on Samsung's A and M series phones that secretly collects sensitive data and can't be easily removed. Developed by ironSource (now owned by Unity), this app lacks transparency regarding its data practices, raising significant privacy and security concerns. An open letter demands Samsung provide clear information about AppCloud, offer an opt-out, and reconsider its pre-installation practices.

(smex.org)

Tech bloatware

Automating Daily Weather Text Messages

2025-06-14

Tired of opening the weather app every morning? The author explored two methods: First, a Zapier automation sent a daily weather text message around 7 AM. However, lacking customizability and relying on a third party, he built a more flexible system using TypeScript, Twilio, and GitHub Actions. Open-Meteo API provides weather data, Twilio sends SMS messages, and GitHub Actions triggers the task at 6:45 AM daily (accounting for timezones). While the custom summary is less detailed than Zapier's, he gained control and cost-effectiveness, planning improvements to the summary's detail.

(bensilverman.co.uk)

Development weather

Alligator Eggs: A Game That Teaches Lambda Calculus

2025-01-20

In 2007, Bret Victor created "Alligator Eggs," a puzzle game that ingeniously translates the abstract concepts of lambda calculus into a playful game mechanic. Hungry alligators represent lambda abstractions, old alligators represent parentheses, and eggs represent variables. The process of alligators eating other alligator families corresponds to beta-reduction, the color rule corresponds to alpha-conversion, and the old alligator death rule corresponds to parenthesis elimination. Players solve a series of puzzles to gradually understand the core concepts of lambda calculus, such as beta-reduction and alpha-conversion. The game not only provides a fun way for children to learn lambda calculus but also offers an intuitive tool for understanding and calculating lambda calculus.

(worrydream.com)

Game gamified learning

Fairphone 6: A Sustainable Smartphone Revolution

2025-06-25

Fairphone 6: A Sustainable Smartphone Revolution

The Fairphone 6 represents a significant step towards sustainable technology. Designed for longevity with modular, repairable hardware and long-term software support, it minimizes e-waste. Over 50% of its materials are fair or recycled, including aluminum, copper, steel, and various rare earths. Manufactured using renewable energy in a factory committed to fair wages and worker well-being, the Fairphone 6 also offsets its remaining carbon footprint through Gold Standard climate projects. It's a phone built to last, ethically sourced, and environmentally conscious.

(shop.fairphone.com)

Hardware sustainable phone e-waste reduction ethical sourcing

Cross-Country Killing Spree Linked to Online 'Death Cult'

2025-02-02

Cross-Country Killing Spree Linked to Online 'Death Cult'

A string of recent killings across the US has been linked to a fringe online group called the "Zizians," described as a death cult. The incidents include a samurai sword attack in Vallejo, California, and a deadly shootout with Border Patrol agents in Vermont. Investigations suggest a connection between the killings, with weapons possibly originating from an individual linked to the Vallejo homicide. The group, associated with the Rationalism movement, holds extreme views on AI and other topics. One individual warned a friend about the group, labeling them a "death cult."

(www.sfgate.com)

Misc Death Cult Killing Spree Online Extremist Group

The Vasa: A 333-Year-Old Shipwreck Raised from the Depths

2025-03-03

The Vasa: A 333-Year-Old Shipwreck Raised from the Depths

This article recounts the incredible story of the Vasa, a magnificent Swedish warship that sank on its maiden voyage in 1628 and remained submerged for 333 years. Engineer Anders Franzén, after a five-year search, located and spearheaded the ambitious recovery operation. The challenging salvage process, involving innovative techniques and years of painstaking work, is detailed. Today, the remarkably preserved Vasa stands as a testament to 17th-century shipbuilding and a major Scandinavian tourist attraction, housed in its own museum.

(www.mentalfloss.com)

Tech Salvage Museum

UUSEC WAF: A Free, High-Performance Web Application Firewall

2025-03-16

UUSEC WAF: A Free, High-Performance Web Application Firewall

UUSEC WAF is a free, high-performance, and highly scalable web application firewall (WAF) and API security protection product that leverages AI and semantic engines. It boasts a three-layered defense mechanism (traffic, system, and runtime layers). Employing machine learning for anomaly detection, it intercepts 0-day attacks without needing extra rules. Its self-developed cache cleaning surpasses commercial nginx versions, offering regex matching for enhanced flexibility. Built-in HIPS and RASP provide powerful dual-layer defense. Advanced semantic engines and Lua scripting allow for highly flexible rule creation. Installation is straightforward, with host and Docker options. Benchmark tests show accuracy exceeding 99%, significantly outperforming comparable free WAFs.

(github.com)

Tech

A Dummy's Guide to Modern LLM Sampling

2025-05-04

A Dummy's Guide to Modern LLM Sampling

This technical article provides a comprehensive guide to sampling methods used in Large Language Model (LLM) text generation. It starts by explaining why LLMs use sub-word tokenization instead of words or letters, then delves into various sampling algorithms, including temperature sampling, penalty methods (Presence, Frequency, Repetition, DRY), Top-K, Top-P, Min-P, Top-A, XTC, Top-N-Sigma, Tail-Free Sampling, Eta Cutoff, Epsilon Cutoff, Locally Typical Sampling, Quadratic Sampling, and Mirostat. Each algorithm is explained with pseudo-code and illustrations. Finally, it discusses the order of sampling methods and their interactions, highlighting the significant impact of different ordering on the final output.

(rentry.co)

AI Text Generation Sampling Algorithms

Cloudflare's Web Bot Auth: Secure Your Bots with Cryptographic Signatures

2025-08-28

Cloudflare's Web Bot Auth: Secure Your Bots with Cryptographic Signatures

Cloudflare introduces Web Bot Auth, an authentication method using cryptographic signatures in HTTP messages to verify requests originate from automated bots. This guide details integrating Web Bot Auth into Cloudflare, covering key generation (Ed25519), hosting a key directory, bot registration, and request signing. By adhering to IETF drafts, developers ensure their bot requests are verified, enhancing security and preventing abuse.

(developers.cloudflare.com)

Development

Mesa 25.1.1 Windows Builds Released: Troubleshooting Common Issues

2025-05-27

Mesa 25.1.1 Windows Builds Released: Troubleshooting Common Issues

Mesa 25.1.1 builds for Windows (using Visual Studio and MSYS2 Mingw-w64) are now available. This release was sponsored by Petrosky, providing a dedicated build machine. The release addresses numerous common issues, such as missing libgallium_wgl.dll, libEGL.dll, and libvulkan-1.dll errors, often fixable by redeploying applications or using provided fix tools. Comprehensive documentation details differences between MSVC and MinGW packages, package contents, configuration and usage of various drivers (llvmpipe, GLonD3D12, zink, etc.), legacy software compatibility, OpenGL context configuration overrides, and provides solutions and environment variable settings.

(github.com)

Development

XNU Kernel: The Foundation of Apple's Ecosystem

2025-04-06

XNU Kernel: The Foundation of Apple's Ecosystem

This deep dive explores the architecture and evolution of XNU, the core kernel powering Apple's operating systems (macOS, iOS, etc.). XNU is a unique hybrid kernel combining the strengths of the Mach microkernel and BSD Unix, balancing modularity and performance. Tracing XNU's history from its Mach microkernel origins, the article covers architectural transitions from PowerPC to Intel to Apple Silicon, improvements in multi-core support, 64-bit capabilities, and enhanced security mechanisms (SIP, Secure Enclave, Exclaves). XNU's success lies in its flexibility and scalability, adapting to devices ranging from iPhones to Mac Pros and providing a powerful foundation for Apple's ecosystem.

(tansanrao.com)

Development Apple operating systems

Sony's Hawk-Eye Revolutionizes NFL Down Measurement

2025-04-06

Sony's Hawk-Eye Revolutionizes NFL Down Measurement

Sony's Hawk-Eye technology will become the primary method for measuring the line to gain in the NFL, starting in the 2025 season. This system uses six 8K cameras for precise distance measurement, replacing the traditional chain gang, improving efficiency and accuracy. Hawk-Eye will be deployed across all 30 NFL stadiums and integrated with the league's existing replay system. This innovation enhances game fairness, efficiency, and provides a smoother viewing experience for fans, marking a significant step in technology-assisted officiating for the NFL.

(www.hawkeyeinnovations.com)

Tech Sports Tech

The Reproducibility Crisis: How Genomic Mutations in Model Organisms Are Skewing Results

2025-05-15

The Reproducibility Crisis: How Genomic Mutations in Model Organisms Are Skewing Results

A new study reveals that the genomes of laboratory animal models accumulate mutations over time, a significant contributor to the reproducibility crisis in scientific research. Researchers found that common model animals like mice acquire new mutations each generation, potentially altering gene regulation and impacting experimental outcomes. While some labs attempt to mitigate this by cryopreserving embryos, it's not a complete solution. To improve reproducibility, scientists need more frequent genomic sequencing of model organisms and a better understanding of gene regulation differences to better control experimental variables.

(www.asimov.press)

Tech genomic mutations reproducibility crisis model organisms

TikTok's US Fate Hangs in the Balance: A Final Ultimatum

2025-07-25

TikTok's US Fate Hangs in the Balance: A Final Ultimatum

The Trump administration vowed to save TikTok's US operations, but months of negotiations have yielded no deal with the Chinese government. Now, Trump's Commerce Secretary Lutnick warns that if China doesn't approve the latest deal—potentially resulting in a crippled US-only version—the US will soon shut down TikTok. The deal demands US control over TikTok's algorithm, a condition ByteDance seems unwilling to meet, unwilling to relinquish its core technology. TikTok's US future remains uncertain, caught in a high-stakes game of national security and commercial interests.

(arstechnica.com)

Tech

Google URL Shortener Shutdown Announced

2025-07-25

Google URL Shortener Shutdown Announced

Google is shutting down its URL shortening service, goo.gl, on August 25th, 2025. Starting August 23rd, 2024, some goo.gl links will display a notification page warning users of the impending shutdown. Developers are urged to migrate to alternative URL shortening services. goo.gl links generated through Google apps will continue to function.

(developers.googleblog.com)

Development

Secure Your Angular App with Keycloak and the BFF Pattern

2025-01-28

This article demonstrates building a secure web application using the Backend for Frontend (BFF) pattern, integrating Keycloak and Angular. To avoid storing sensitive data in the browser, authentication flows with Keycloak are entirely handled by a dedicated BFF server. The BFF acts as a secure intermediary between Keycloak and the Angular app, managing OAuth2 and PKCE flows, securely storing tokens, and preventing sensitive operations (like token refresh) from reaching the browser. The Angular app interacts only with simplified endpoints provided by the BFF, eliminating direct communication with Keycloak. The article details Keycloak configuration, BFF server setup (using Express.js), and Angular app development, highlighting the security benefits of this architecture.

(blog.brakmic.com)

Development BFF pattern

Undergrad Elegantly Solves Century-Old Problem, Improves Wind Turbine Design

2025-02-24

Undergrad Elegantly Solves Century-Old Problem, Improves Wind Turbine Design

Divya Tyagi, an aerospace engineering undergraduate at Penn State, elegantly refined a century-old mathematical problem—Glauert's problem—making it simpler and easier to use. Her research expands aerodynamic research, unlocking new possibilities in wind turbine design by addressing factors Glauert didn't consider, such as blade bending under wind pressure. Tyagi's addition, based on the calculus of variations, simplifies the solution, allowing exploration of new facets of wind turbine design and promising improved wind energy production and reduced costs. Her work, published in *Wind Energy Science*, earned her the Anthony E. Wolk Award.

(www.psu.edu)

Tech wind energy aerodynamics mathematical modeling

Great Firewall Anomaly: Widespread TCP Port 443 Outage in China

2025-08-20

Great Firewall Anomaly: Widespread TCP Port 443 Outage in China

Between 00:34 and 01:48 Beijing Time (UTC+8) on August 20, 2025, the Great Firewall of China (GFW) exhibited anomalous behavior, unconditionally injecting forged TCP RST+ACK packets to TCP port 443, causing a massive disruption of internet connections between China and the rest of the world. The roughly 74-minute outage affected only port 443, with asymmetrical triggering mechanisms for inbound and outbound traffic. Analysis suggests the responsible device doesn't match known GFW fingerprints, possibly indicating a new device or a misconfigured one. Researchers urge community participation to fully understand this event.

(gfw.report)

Tech Great Firewall Internet Outage

FastVLM: Blazing Fast Vision Encoding for Vision Language Models

2025-05-13

FastVLM: Blazing Fast Vision Encoding for Vision Language Models

FastVLM introduces a novel hybrid vision encoder, dramatically reducing encoding time and token output for high-resolution images. Even the smallest variant boasts an 85x faster Time-to-First-Token (TTFT) and a 3.4x smaller vision encoder than LLaVA-OneVision-0.5B. Larger variants, paired with Qwen2-7B LLM, outperform recent models like Cambrian-1-8B, achieving a 7.9x faster TTFT. A demo iOS app showcases its mobile performance. The project provides detailed instructions for inference and supports Apple Silicon and Apple devices.

(github.com)

AI Vision Language Model Efficient Encoding Image Recognition

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