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Derivatives, Gradients, Jacobians, and Hessians: A Deep Dive

2025-08-17

Derivatives, Gradients, Jacobians, and Hessians: A Deep Dive

This article provides a clear explanation of derivatives, gradients, Jacobian matrices, and Hessian matrices, four fundamental concepts in calculus and their applications. Derivatives describe the rate of change of a function, gradients point in the direction of the greatest increase, Jacobian matrices describe the warping of space for multivariable functions, and Hessian matrices contain second-order derivatives, describing curvature. These concepts are crucial in optimization algorithms (like gradient descent) and computer graphics (e.g., anti-aliasing rendering), providing a deeper understanding of machine learning and graphics rendering.

(blog.demofox.org)

Development matrices

VW Backtracks on Touchscreens: Physical Controls Are Back

2025-03-08

VW Backtracks on Touchscreens: Physical Controls Are Back

Volkswagen is reversing course on its touchscreen-heavy approach to car controls. Design chief Andreas Mindt announced that all future VW models will feature physical buttons for key functions. This follows criticism of the company's previous move to replace many physical controls with touchscreens. Starting with the production version of the ID.2all next year, vital controls like volume, heating, fan speed, and hazard lights will get dedicated physical buttons. Mindt stated that this change reflects a commitment to prioritizing driver safety and usability, acknowledging past mistakes and ensuring a more intuitive driving experience.

(www.autocar.co.uk)

Tech Physical Buttons User Interface

23andMe's Financial Troubles: Californians Can Delete Their Genetic Data

2025-03-22

23andMe's Financial Troubles: Californians Can Delete Their Genetic Data

Facing financial distress, genetic testing company 23andMe has prompted California Attorney General Rob Bonta to remind Californians of their rights under the Genetic Information Privacy Act (GIPA) and the California Consumer Privacy Act (CCPA) to delete their genetic data and destroy samples. Users can delete their accounts and personal information through 23andMe's website, following steps to download data, permanently delete it, and destroy samples.

(oag.ca.gov)

Tech genetic privacy

The Strangest Microwave Purchase Ever: A Trip to GO12

2025-09-08

The Strangest Microwave Purchase Ever: A Trip to GO12

SoraNews24 reporter Mr. Sato embarked on a mission to buy a new office microwave, but chose the unusual route of GO12, a 24/7 unmanned electronics store in Kamata, Tokyo. This store stocks used appliances, offering a self-service shopping experience via a tablet payment system. Mr. Sato purchased a 5,000 yen microwave, enjoying a smooth transaction, yet feeling a strange sense of guilt. GO12's trust-based system and unique shopping experience, while convenient, spark reflections on social trust and human nature.

(soranews24.com)

Misc unmanned store shopping experience

A Novel Complex Constant Derived from the Golden Ratio and its Transcendence Conjecture

2025-06-22

A research paper by Tristen Harr introduces and analyzes a new complex constant, ΛG1, derived from inverse powers of the golden ratio, ϕ. Defined as ΛG1 = T + iJ, where T = 1/(2ϕ) and J = 1/(2ϕ²), it's proven to be an algebraic number with a magnitude less than one, suitable as an argument for the Polylogarithm function, Lis(z). High-precision numerical evaluations for Dilogarithm (s=2) and Trilogarithm (s=3) suggest Lis(ΛG1) is transcendental for all integers s≥2 and lies outside the field extension Q(π, ln(2), ϕ). This research is partly motivated by potential applications in quasicrystal studies, where the golden ratio is fundamental.

(zenodo.org)

Math transcendental number

AI's Context Window: Why a Universal Standard is Needed

2025-04-01

AI's Context Window: Why a Universal Standard is Needed

Current AI models' knowledge is fixed during pre-training, with expensive fine-tuning offering limited updates. This leaves them blind to information beyond a cutoff date. This article explores "context" in AI: user input, conversation history, and external data sources, all constrained by a "context window." A universal standard for external data sources is crucial to overcome this limitation, enabling AI to access real-time information for improved intelligence and functionality.

(arstechnica.com)

AI data standard

Google Family Link to Allow Kids Access to Gemini AI

2025-05-03

Google Family Link to Allow Kids Access to Gemini AI

Google is rolling out access to its Gemini AI apps for children via its Family Link parental controls on Android devices. While Gemini can assist with homework and storytelling, Google cautions parents that the AI can make mistakes and children may encounter inappropriate content. Google assures that children's data won't be used for AI training. Parents are advised to discuss with their children that Gemini is not human and to avoid sharing sensitive information. Parents retain control via Family Link, receiving notifications upon their child's first Gemini access and retaining the ability to disable access entirely.

(www.theverge.com)

AI Child Privacy

HTTL CLI: Streamlining HTTL Queries from Your Terminal

2025-02-20

HTTL CLI: Streamlining HTTL Queries from Your Terminal

Starting with version 0.1.7, HTTL offers a command-line interface (CLI) for executing HTTL queries directly from your terminal. This is ideal for integrating HTTL into CI/CD pipelines or existing automation scripts. The HTTL CLI supports all HTTL language features and provides formatted, colorized output. Installation requires Node.js 16.14 or later and is done via npm globally.

(httl.dev)

Development

Windows Update Bricking USB Printers: Random Text Mayhem

2025-03-13

Windows Update Bricking USB Printers: Random Text Mayhem

Microsoft has acknowledged that recent Windows updates (KB5050092 and later, released since January 29th, 2025) are causing some dual-mode USB printers (supporting both USB Print and IPP over USB) to print random gibberish. This includes network commands and unusual characters. Windows 10 22H2 and Windows 11 22H2/23H2 are affected; Windows 11 24H2 is not. Microsoft has fixed this via Known Issue Rollback (KIR), and the fix will also automatically roll out in a future update. For enterprise environments, IT admins need to install and configure specific group policies to resolve the issue on affected devices.

(www.bleepingcomputer.com)

Hardware Windows Update USB Printer

Reverse-Engineering a Pentium's Carry-Lookahead Adder

2025-01-18

Reverse-Engineering a Pentium's Carry-Lookahead Adder

Ken Shirriff's blog post details the reverse engineering of an 8-bit adder within the Pentium's floating-point unit. This adder, a Kogge-Stone carry-lookahead adder, accelerates addition by calculating carry bits in parallel. The post meticulously explains the carry-lookahead adder's principle, showcasing the Pentium's hardware implementation—a four-layer circuit structure employing the Kogge-Stone algorithm. It also discusses the adder's role in the Pentium's floating-point division unit and its connection to the infamous Pentium FDIV bug.

(www.righto.com)

Hardware carry-lookahead adder

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

The Loss of Interstitial Time: How Smartphones Are Killing Boredom and Creativity

2025-05-05

The Loss of Interstitial Time: How Smartphones Are Killing Boredom and Creativity

This article explores the impact of smartphones and social media on our lives, particularly the erosion of 'interstitial time' – those small pockets of time between activities. The author argues that these moments, once used for reflection, conversation, or daydreaming, are now consumed by our phones, leading to decreased attention spans, impatience, and reduced creativity. The constant pursuit of instant gratification diminishes the value of waiting and boredom, impacting our anticipation of the future and our overall life experience. The article calls for a renewed appreciation of interstitial time, encouraging the cultivation of patience and creativity for a more fulfilling life.

(www.afterbabel.com)

Misc attention span

Converge Hiring Senior Full-Stack Engineer: Build a Million-Dollar Marketing Measurement Platform

2024-12-16

Converge Hiring Senior Full-Stack Engineer: Build a Million-Dollar Marketing Measurement Platform

Converge, a Y Combinator-backed company with over $1M in ARR, is hiring a senior full-stack engineer. The small team (only 4 people) serves 180+ customers, processing billions of dollars in annual sales and billions of events per month. You'll build a unified marketing measurement stack, including customer data collection, identity resolution, and marketing attribution, with direct customer interaction and significant ownership. The company values action-orientedness, continuous learning, positive attitudes, and simplicity. Requires extensive full-stack experience, proficiency in React and backend development, and knowledge of production software deployment and scaling.

(www.ycombinator.com)

Development Full-Stack Engineer Marketing Measurement

Stop the Back-and-Forth: Craft the Perfect AI Coding Prompt from the Start

2025-08-17

Stop the Back-and-Forth: Craft the Perfect AI Coding Prompt from the Start

When using AI coding assistants, instead of endless clarifications and corrections, revise your initial prompt. Think of it like giving instructions – constant changes confuse the recipient. AI assistants are similar; multiple edits lead to conflicting context, confusion, and degraded performance. Provide clear, complete instructions upfront, letting the AI start fresh for better results. A precise initial prompt avoids iterative refinement.

(elite-ai-assisted-coding.dev)

Development

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

Carl Sagan's Prophecy: The Decline of Science and America's Future

2025-02-05

Carl Sagan's Prophecy: The Decline of Science and America's Future

This article explores Carl Sagan's prediction of America's future trajectory, contrasting it with the cyclical theory of history proposed by the 18th-century philosopher Giambattista Vico. Sagan feared that the benefits of technological advancement in America would be controlled by a select few, leading to a decline in public scientific literacy, a rise in superstition, and ultimately, societal decline. This aligns with Vico's theory of cyclical rise and fall, but Sagan believed that reversing this trend through science education was possible. The article serves as a warning about the importance of science literacy education and avoiding a repeat of history.

(www.openculture.com)

Tech science education technological future social prediction

Unlocking AI's Potential: The Missing Guide to Prompt Engineering

2025-07-21

Unlocking AI's Potential: The Missing Guide to Prompt Engineering

This article highlights the critical role of prompt engineering in maximizing AI performance. It emphasizes that clear prompts lead to accurate and useful AI outputs, while poorly crafted prompts result in inaccurate information and wasted resources. The article distinguishes between conversational prompting for casual use and product prompting for business applications, focusing on the latter's precision and importance in building reliable AI-powered systems. It offers techniques for crafting effective prompts, including guiding AI reasoning, self-checking, and meeting specific requirements, ultimately advocating for a collaborative approach to harnessing AI's full potential.

(appetals.com)

AI AI collaboration

Holy Grail! I Found a Bug in the Sort Function!

2025-02-24

Holy Grail! I Found a Bug in the Sort Function!

The author recounts an incredible experience in his years of programming: he found a bug in JavaScript's built-in `sort()` function! This bug caused incorrect sorting results, baffling him for a long time. Eventually, he reported the bug to the Code Studio team, who responded quickly and fixed it. This story vividly illustrates that even seemingly perfect system software can have bugs, and programmers should maintain a skeptical mindset, persistently searching for the root cause of problems instead of blindly blaming the compiler or system.

(blog.plover.com)

Development sort function

Deep Dive: Humans to Test Underwater Habitat in 2025

2025-01-06

Deep Dive: Humans to Test Underwater Habitat in 2025

British startup Deep is pioneering underwater living with its Sentinel project, a modular habitat slated for completion in 2027. Utilizing advanced 3D printing and welding, Sentinel will enable scientists to live and work at depths up to 200 meters for extended periods. A smaller, transportable habitat called Vanguard, launching in 2025, will serve as a testbed. Vanguard can house three divers for up to a week, demonstrating the potential to dramatically increase the efficiency of ocean research and enhance our understanding of marine ecosystems in the face of climate change.

(spectrum.ieee.org)

Tech Underwater Habitat Ocean Exploration 3D Printing

Google DeepMind Uses Paid Leave to Combat AI Talent War

2025-04-09

Google DeepMind Uses Paid Leave to Combat AI Talent War

In the fierce battle for AI talent, Google DeepMind is employing an unusual tactic: offering some employees a paid year-long vacation to prevent them from joining competitors. This stems from strict non-compete agreements faced by UK DeepMind staff, lasting up to 12 months. While Google claims its contracts are market standard, many former employees feel these agreements restrict career advancement, especially in the booming AI landscape. Some even considered relocating from London to California to circumvent these restrictions. One former employee likened it to a 'space race,' highlighting the importance of a six-month to year-long lead in AI.

(www.businessinsider.com)

Tech AI talent war Google DeepMind

Testing Robust Netcode in Godot: A Tale of Latency and Packet Loss

2025-06-19

Testing Robust Netcode in Godot: A Tale of Latency and Packet Loss

Developing the online multiplayer aspect of Little Brats! presented a significant challenge: synchronizing computers with varying latency while maintaining fast-paced gameplay. This post details the author's journey, focusing on lag compensation, prediction/reconciliation techniques, and robust testing methodologies. Using Godot's ENetMultiplayerPeer class and the Linux `tc` command for simulated network conditions (latency and packet loss), the author compares the performance of reliable and unreliable network modes, providing insightful graphs and conclusions. The process highlights the complexities of building a stable online game and offers practical advice for developers.

(studios.ptilouk.net)

Development Multiplayer Game Development Network Testing

Optimizing Airport Travel: A Practical Guide

2025-08-24

Optimizing Airport Travel: A Practical Guide

This article offers a practical guide to optimizing airport travel, drawing on the author's personal experiences. Key strategies include booking flights about two weeks in advance, opting for basic economy and direct flights, avoiding budget airlines, and efficiently managing time at the airport. The author suggests arriving at the terminal one hour before departure, adjusting this based on factors like traffic and checked baggage. The article also explores maximizing airport waiting time through activities like reading, listening to music, or watching movies, and cautions against attempting work on the plane unless absolutely necessary.

(thezvi.substack.com)

Misc airport travel travel strategies

Turn Your Old iPhone or RTSP Camera into an AI Security Camera

2025-08-24

Turn Your Old iPhone or RTSP Camera into an AI Security Camera

The Clearcam app lets you upgrade your old iPhone or any RTSP-enabled camera into a state-of-the-art AI security camera. With a simple Homebrew install and running a Python script, you can view live feeds and receive event notifications (objects/people detected) on your local browser. Clearcam Premium offers remote viewing, event clips, and end-to-end encryption. Currently only iOS is supported, Android users can use the iOS User ID temporarily.

(github.com)

Tech

Exploiting CVE-2024-50264: A Race Against Time in the Linux Kernel

2025-09-03

Exploiting CVE-2024-50264: A Race Against Time in the Linux Kernel

This article details the author's journey exploiting the complex CVE-2024-50264 Linux kernel vulnerability using their kernel-hack-drill project. The vulnerability, a challenging race condition, presented numerous obstacles, including a UAF write occurring microseconds after kfree(), hindering cross-cache attacks. The author cleverly utilized the 'immortal' signal 33 to interrupt the connect() syscall, combined with a cross-cache attack and a novel msg_msg spraying technique, ultimately bypassing limitations and achieving privilege escalation. This challenging exploit showcases advanced reverse engineering and exploitation skills, highlighting the value of kernel-hack-drill in vulnerability research.

(a13xp0p0v.github.io)

Development Linux Kernel Vulnerability Race Condition

JetBrains Shifts Gears on Kotlin Multiplatform Tooling: No Standalone IDE

2025-02-12

JetBrains Shifts Gears on Kotlin Multiplatform Tooling: No Standalone IDE

JetBrains announced a change of direction for its Kotlin Multiplatform (KMP) tooling. Instead of a standalone IDE, they'll focus on enhancing KMP support within the IntelliJ Platform (IntelliJ IDEA and Android Studio). Support for KMP in their Fleet IDE will be deprecated in the next three months. This shift prioritizes user feedback and leverages advancements like AI to improve developer experience.

(blog.jetbrains.com)

Development Multiplatform Development

Decentralized Mastodon Defies Mississippi's Age Verification Law

2025-08-30

Decentralized Mastodon Defies Mississippi's Age Verification Law

Decentralized social network Mastodon announced its inability to comply with Mississippi's age verification law, the same law that prompted rival Bluesky to leave the state. Mastodon cites its user-tracking limitations and reluctance to employ IP-based blocks as reasons for non-compliance. Founder Eugen Rochko highlighted the importance of true decentralization, stating that no one can unilaterally decide to block Mississippi from the Fediverse. While Mastodon's own servers specify a minimum signup age, its software doesn't support age verification across all servers. Individual server owners must decide on age verification implementation. Mastodon claims it can't directly assist other server operators, suggesting they consult online resources and comply with local laws.

(techcrunch.com)

Tech

Visualizing 6D Mesh Parallelism in Deep Learning Training

2024-12-19

Visualizing 6D Mesh Parallelism in Deep Learning Training

This article delves into the complexities of 6D mesh parallelism in deep learning model training. Using a series of visualizations, the author meticulously explains the communication mechanisms of various parallel strategies—data parallelism, fully sharded data parallelism, tensor parallelism, context parallelism, expert parallelism, and pipeline parallelism—during the model's forward and backward passes. The author uses a simple attention layer model to illustrate the implementation details of each parallel approach, highlighting their interactions and potential challenges, such as the conflict between pipeline parallelism and fully sharded data parallelism. The article concludes by discussing mesh ordering, combining different parallel strategies, and practical considerations.

(main-horse.github.io)

AI parallel computing model training

Subreply: A Tiny, Mighty Internal Social Network

2025-07-21

Subreply: A Tiny, Mighty Internal Social Network

Subreply is a small but powerful social network designed for ease of use, modification, and maintenance. It's easy to install, boasts response times under 50ms per request, and is ideal as an internal social network for any organization. Free of unnecessary abstractions, the code is clean and efficient. Cost depends on the level of support needed. Create an account at https://subreply.com or use the provided command-line instructions to install and migrate.

(github.com)

Development internal social network

Critical Intel CPU Flaw Bypasses Spectre-BTI Mitigations: Branch Privilege Injection (CVE-2024-45332)

2025-05-13

Researchers have discovered a critical vulnerability in Intel CPUs, dubbed Branch Privilege Injection (CVE-2024-45332), that bypasses hardware mitigations against Spectre-BTI attacks implemented over the past six years. Exploiting asynchronous branch predictor updates and insufficient synchronization during privilege switches, the flaw allows attackers to leak arbitrary memory at 5.6KiB/s. Intel has released a microcode update to address this, but it incurs a performance overhead of up to 2.7%. The vulnerability affects all Intel processors since the 9th generation (Coffee Lake Refresh).

(comsec.ethz.ch)

Tech

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

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