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Visual Math Proofs: A Gallery of Geometric Demonstrations

2025-06-18

This article presents a collection of visual proofs for various mathematical identities and theorems, drawing inspiration from a gallery of geometric demonstrations. It covers summations, geometric series, geometry, and miscellaneous topics. Examples include intuitive pictorial proofs of the Pythagorean theorem, triangle area formulas, and various summation formulas. These visual proofs offer a concise and insightful approach to understanding complex mathematical concepts.

(artofproblemsolving.com)

Misc mathematical proofs visual demonstrations

Awesome Donations: A Curated List of FLOSS Projects to Support

2025-01-03

Awesome Donations: A Curated List of FLOSS Projects to Support

This GitHub repository, awesome-donations, is a curated list of donation options for numerous Free/Libre and Open Source Software (FLOSS) projects. It provides easy access to support projects ranging from large foundations like the Linux Foundation and Mozilla Foundation to individual projects such as LibreOffice, GIMP, and QEMU. Whether you prefer PayPal, credit cards, or other methods, you can easily contribute to the open-source community and help ensure the continued development of essential free software.

(github.com)

Development donations

Greptile: Hiring Design/Product Engineer for AI Code Review Tool

2025-03-05

Greptile: Hiring Design/Product Engineer for AI Code Review Tool

Greptile, a startup building AI developer productivity tools for large, real-world codebases (starting with an AI code review bot), is hiring a Design/Product Engineer. They've raised $5.3M from investors like YC and are experiencing 20-30% monthly growth, serving over 1000 software teams. Ideal candidates will have strong TS/JS skills, UI/UX design experience, and US work authorization, and be willing to relocate to San Francisco.

(www.ycombinator.com)

Development Developer Tools

Rules for Writing Kickass Software Tutorials

2025-01-02

Rules for Writing Kickass Software Tutorials

This blog post outlines rules for crafting exceptional software tutorials. It highlights the importance of avoiding jargon, clearly stating goals, providing copy-pasteable code snippets, maintaining a working code state, and minimizing dependencies. The author uses contrasting examples to illustrate the differences between good and bad tutorials, offering practical improvements such as using long command-line flags, separating user-defined values from reusable logic, and employing consistent, descriptive headings. The ultimate aim is to create beginner-friendly tutorials that are easy to understand and follow.

(refactoringenglish.com)

Development software tutorials technical writing

Ultrasonic Cutting: The Future of Cake Slicing (and More)

2025-03-22

Ultrasonic Cutting: The Future of Cake Slicing (and More)

From a single slice of cake at home to thousands for a commercial bakery, the way we cut cake needs an upgrade. Regular knives struggle with sticky foods, leading to messy cuts and inefficiency. Enter ultrasonic cutting, a technology that uses high-frequency vibrations to prevent sticking, resulting in perfectly clean cuts. This isn't just for food; it's used in rubber, textiles, and more, even melting and sealing edges. While maybe overkill for home use, it's a game-changer for anyone who needs perfectly sliced cake – or other materials.

(hackaday.com)

Tech ultrasonic cutting food processing

Secret Passages Unearthed Beneath Milan's Sforza Castle: A Da Vinci Connection?

2025-03-09

Secret Passages Unearthed Beneath Milan's Sforza Castle: A Da Vinci Connection?

Scientists have discovered a hidden network of underground passages beneath Milan's Sforza Castle using non-destructive methods like ground-penetrating radar and laser scanning. The tunnels, hinted at in a Leonardo da Vinci sketch from around 1495 and historical records, likely served as escape routes or defense mechanisms for soldiers. This discovery underscores Da Vinci's military engineering prowess and highlights the importance of preserving cultural heritage. Further investigation revealed additional tunnels and underground chambers, one possibly leading to the Basilica of Santa Maria delle Grazie, potentially built by the Duke of Milan to access his late wife's tomb. Despite significant historical damage, the castle's subsurface structures retain a wealth of historical information, reminding us that history is often hidden in plain sight.

(www.cnn.com)

Tech Sforza Castle Underground Tunnels

PLATO: How a 1960s Educational Computer System Shaped the Future

2024-12-16

PLATO: How a 1960s Educational Computer System Shaped the Future

PLATO, a groundbreaking educational computer system from the 1960s, significantly impacted the development of modern computing. Preceding its time, it pioneered features like forums, instant messaging, and multiplayer games. Its innovative gas plasma display, the TUTOR authoring language, and its advanced networking capabilities for simultaneous users were revolutionary. While PLATO's home market success was limited, its influence on graphic displays, networking, and user interfaces remains undeniable. Its legacy continues through emulators and modern reimaginings, preserving a piece of computing history and its vision for the future of education and interactive technology.

(arstechnica.com)

Tech Educational Technology

Anker Recalls 1 Million Power Banks: CT Scan Reveals Battery Defects

2025-07-22

Anker Recalls 1 Million Power Banks: CT Scan Reveals Battery Defects

Anker recalled over one million PowerCore 10000 power banks due to lithium-ion battery overheating risks. Lumafield used industrial CT scanning to analyze recalled and non-recalled units, revealing variations in battery cell suppliers, connection methods, and gap sizes between positive and negative terminals. These variations could lead to short circuits and overheating. The newer model uses a single pouch cell, simplifying assembly and improving safety. This case highlights the complexity of battery supply chains and the importance of quality control, showcasing industrial CT scanning's role in ensuring product safety and improving quality.

(www.lumafield.com)

Hardware product recall industrial CT scan

Append-Only Programming: A Fun Experiment

2025-02-21

The author experimented with a new software development methodology called "append-only programming": all code resides in a single C file, new code is appended to the end, and editing existing code is forbidden. This forces programmers to define interfaces upfront, write small functions, and produces highly readable code. However, this approach is error-prone; if a function is erroneous, a corrected version must be appended, and all callers must be corrected, potentially requiring rewriting the entire program. The author experimented with a Lisp interpreter and found it tedious. Ultimately, the author concludes it's a fun challenge but not a practical software development method, suggesting improvements such as using header files or one file per function.

(iafisher.com)

Development

Apple's AI Overhaul: Veteran Exec Joins to Rescue Siri

2025-01-24

Apple's AI Overhaul: Veteran Exec Joins to Rescue Siri

Apple Inc. is doubling down on AI, appointing veteran executive Kim Vorrath to its AI and machine learning division. Vorrath, a VP with a proven track record of fixing troubled products, will report to AI chief John Giannandrea. This move signals a push to improve Siri and the Apple Intelligence platform, which have lagged behind competitors like OpenAI and Google. The plan includes a revamped Siri in iOS 18.4, leveraging user data for better response and app control. However, challenges remain, including recent backlash over inaccurate AI-generated news summaries. Vorrath's expertise in managing complex software projects is key to Apple's ambition of becoming an AI leader.

(finance.yahoo.com)

Tech

Clojure Accounting: Evolving from Script to Interactive Web App

2025-03-08

The author initially used a Clojure script for accounting, but as the number of transactions grew, maintenance and sharing became difficult. A simple script is easy to write but provides a poor user experience, while a complex web application offers a good experience but is expensive to develop. The author cleverly combined Clojure's features with a simple web application framework to create an interactive accounting system similar to a notebook. This system allows users to write Clojure code, view results in real-time, and modify accounting rules and data via simple UI elements. It also supports data persistence, version control, and collaborative editing, effectively addressing the shortcomings of the original script and improving user experience and efficiency.

(www.scattered-thoughts.net)

Development

Fish Shell 4.0b1 Beta Released: Core Code Rewritten in Rust, Major Improvements Included

2024-12-22

Fish Shell 4.0b1 Beta Released: Core Code Rewritten in Rust, Major Improvements Included

Fish Shell 4.0b1 beta is out! The major highlight is the porting of the core code from C++ to Rust, resulting in significant performance improvements and enhancements. Many other improvements are included, such as better terminal support, enhanced binding capabilities, improved scripting features, and a better interactive experience. Noteworthy backward-incompatible changes include a new key notation for bindings and the default enabling of the qmark-noglob feature. Overall, this is a significant release offering users a more powerful and efficient shell experience.

(github.com)

Development

Klong: A Concise Array Language

2025-06-20

Klong is a concise array language similar to K, but without the ambiguity. It uses mathematical notation for programming, which might seem simplistic to those familiar with K or APL, while posing a challenge to newcomers. Comprehensive documentation is available, including a reference manual, introductory guide, quick reference, and a comparison of Klong and K. Written in pure ANSI C, it's easy to compile and install, and a vectorized version called KlongPy is also available.

(t3x.org)

Development

Clojure Error Handling: No Silver Bullet, Only Choices

2024-12-14

Clojure offers a diverse range of error-handling approaches, with no single best practice. The article explores several methods: throwing native exceptions, using `ex-info` for data-carrying exceptions, returning error maps, and utilizing various libraries for more sophisticated error handling flows, such as the `anomalies` library or options like `pact` and `failjure`. The author emphasizes that the choice depends on the specific context and that a mix of approaches can coexist within a single project. Developers are empowered to select the most appropriate solution for their needs; Clojure embraces this freedom.

(www.daveliepmann.com)

Development error handling

Adaptable Text Editor 'ad': Blending Vim and Acme

2024-12-18

Adaptable Text Editor 'ad': Blending Vim and Acme

ad is a novel text editor that combines the modal editing interface of Vim and Kakoune with the extensibility approach of Plan9's Acme. ad allows users to execute text and serves as a playground for experimenting with implementing various text editor features. Currently, ad is stable enough and feature-complete enough to try out, though documentation is sparse and bugs may exist. ad's design philosophy blends Vim's modal editing, Emacs's mini-buffer, and Acme's editing commands and extensibility, aiming for a comfortable editing environment that supports direct interaction with external tools and programs.

(github.com)

Development text editor modal editing extensibility

Crazy Lawn Mower: A Software Engineer's Hardware Adventure

2025-08-19

A software engineer, who hadn't touched hardware in 20 years, embarked on a challenging hardware journey at the urging of friends. He transformed a Raspberry Pi into a smart lawn mower control system, adding an OLED display, UPS power supply, camera, and more, to display system information, network status, mowing data, and more in real-time. Along the way, he solved problems such as high CPU usage, abnormal battery level display, and network security, ultimately creating a smart lawn mower capable of networking, monitoring, and collecting mowing data. He shared his achievements and experiences on IRC.

(jotunheimr.idlerpg.net)

Hardware

Node.js EPUB Library @smoores/epub Released

2024-12-13

Node.js EPUB Library @smoores/epub Released

A new Node.js library, @smoores/epub, has been released. It allows developers to inspect, modify, and create EPUB 3 publications. The library offers high-level APIs that simplify interaction with the EPUB specification, such as setting the title and retrieving author information. Lower-level APIs provide granular control over the EPUB structure, enabling tasks like adding chapters and metadata. Built upon fast-xml-parser, @smoores/epub provides robust XML parsing and manipulation capabilities, facilitating efficient handling of EPUB file XML content.

(www.npmjs.com)

Development Library

Schneier's 'Data and Goliath' Prediction: A Decade Later, Privacy Lost?

2025-02-17

Schneier's 'Data and Goliath' Prediction: A Decade Later, Privacy Lost?

A decade after Bruce Schneier's book, 'Data and Goliath,' warned about government and tech giants exploiting personal data, his predictions ring eerily true. Data harvesting continues, especially for AI model training, leaving personal privacy almost completely compromised. Schneier advocates for comprehensive privacy laws and regulation of mass surveillance, but this remains unlikely in the short term. While some regions have implemented regulations, surveillance capitalism and the power of tech monopolies hinder meaningful change. Individual efforts to protect privacy are largely ineffective, and even companies like Apple offer limited protection. Schneier remains cautiously optimistic about long-term privacy, but acknowledges a long road ahead.

(www.theregister.com)

Tech

Implementing a Pseudorandom Number Generator with XORSHIFT32

2025-01-04

This devlog details the implementation of a pseudorandom number generator (PRNG) using the XORSHIFT32 algorithm. The author uses 1804289383 as the initial state, a number previously used in other engine implementations. The implementation is straightforward, involving bit shifts on the initial state. The code defines the initial state and includes a `getRandomNumber()` function that performs the XORSHIFT32 algorithm.

(www.strydr.net)

Development pseudorandom number generator algorithm implementation

Can Large Neural Networks Solve Robotics? Insights from CoRL 2023

2025-07-05

At CoRL 2023, a central debate emerged: can training large neural networks on massive datasets solve robotics? Proponents argued that the success of large models in computer vision and NLP suggests this approach is promising, citing initial results from Google DeepMind's RT-X and RT-2 as examples. They believe the ongoing advancements in data and compute power fuel this direction. However, critics pointed out the current scarcity of robotics data, the immense variability across robot embodiments and environments, and the prohibitive cost of collecting large-scale datasets. Furthermore, even achieving high accuracy might not translate to the 99.X% reliability needed for practical deployment. Some suggested combining classical control methods with learning, while others called for entirely new approaches. Ultimately, CoRL 2023 highlighted the opportunities and challenges in robotics, offering valuable insights for future research.

(nishanthjkumar.com)

AI robotics learning large neural networks

YouTube Audio Quality Deep Dive: Opus vs. AAC

2025-02-01

This article delves into the audio quality of YouTube videos. The author, collaborating with the Ralph Vaughan-Williams Society, compared original audio files with various encoded versions available on YouTube, focusing on Opus and AAC codecs. The analysis revealed that YouTube's audio processing introduces some distortion, particularly at higher frequencies. While the Opus codec performed better in some aspects, overall YouTube's audio quality shows room for improvement.

(www.audiomisc.co.uk)

Tech audio quality codecs

Bypass Job Boards: ResumeVue's Private Job Network

2025-01-24

ResumeVue is a private job board connecting job seekers directly with hiring managers, recruiters, VCs, and startup founders. Users bypass traditional job boards, reaching out directly via connection requests, DMs, or emails. Testimonials highlight users finding jobs within a week and securing more interviews. ResumeVue also offers tools to host video resumes and provides analytics, boosting job search effectiveness.

(www.resumevue.com)

Startup private job board

New LLM Jailbreak Exploits Models' Evaluation Skills

2025-01-12

New LLM Jailbreak Exploits Models' Evaluation Skills

Researchers have discovered a novel LLM jailbreak technique, dubbed "Bad Likert Judge." This method leverages LLMs' ability to identify harmful content by prompting them to score such content and then requesting examples, thus generating outputs related to malware, illegal activities, harassment, and more. Tested on six state-of-the-art models across 1440 cases, the average success rate was 71.6%, reaching as high as 87.6%. The researchers recommend that maintainers of LLM applications utilize content filters to mitigate such attacks.

(www.scworld.com)

Tech LLM security jailbreak

Clay: A Robust UI Layout Library

2024-12-19

Clay is a lightweight UI layout library for building responsive and accessible user interfaces. Its clean and intuitive API allows developers to easily create complex layouts while maintaining code maintainability and readability. Clay prioritizes performance and accessibility, ensuring fast loading times and user-friendliness through streamlined code and a well-architected design. Whether building simple page layouts or complex interactive applications, Clay empowers developers to build high-quality UIs efficiently.

(www.nicbarker.com)

Development UI library responsive layout accessibility

X's Engineering Director Abruptly Departs

2025-03-25

X's Engineering Director Abruptly Departs

Haofei Wang, X's director of engineering, has unexpectedly left the company, according to sources. Joining in July 2023, Wang was a key figure bridging Elon Musk and the engineering team. Recently, with Musk focusing on xAI and DOGE, Wang effectively led engineering and product. His departure's reason remains unclear. X recently added engineering leadership from Robinhood. X's business appears to be recovering, recently valued at $44 billion, thanks to xAI's rising profile and Musk's political influence. While Musk remains active on X, his attention is divided. Musk's 'everything app' vision, similar to WeChat, is yet to materialize, though the X Money payment platform is expected later this year.

(www.theverge.com)

Tech Engineering Director Departure

AI-Powered Tool Revolutionizes Protein Design

2024-12-31

AI-Powered Tool Revolutionizes Protein Design

Scientists have developed an AI-powered tool for designing novel proteins. This tool can predict protein 3D structures and design proteins with desired functions, promising to accelerate drug discovery, biomaterial development, and sustainable agricultural technologies. Researchers trained machine learning algorithms to predict protein structures from amino acid sequences. The tool's accuracy and efficiency surpass traditional methods, offering revolutionary possibilities for biomedicine and materials science.

(dogagingproject.org)

AI

C++ Coroutines: A Deep Dive into Customization

2025-07-13

C++ coroutines aren't a ready-to-use library like `std::vector`; they're a specification defining customization points requiring implementation by library writers. Extending the function concept, they support suspend, resume, and destroy operations. The `co_await` keyword marks a coroutine, and `Task::promise_type` customizes behavior at call, return, suspend, and resume points. The `awaiter` and `awaitable` mechanisms handle suspension and resumption, enabling resumption when dependencies are ready, providing flexible asynchronous programming.

(uvdn7.github.io)

Development

Gen Z's 'Career Catfishing': A Silent Workplace Rebellion

2025-01-18

Gen Z's 'Career Catfishing': A Silent Workplace Rebellion

A recent survey reveals that one-third of Gen Z adults are engaging in "career catfishing" – accepting job offers but intentionally not showing up on the first day. This trend reflects Gen Z's pushback against workplace pressures, prioritizing personal needs and goals over conforming to corporate culture. From "quiet quitting" to "coffee badging," Gen Z is challenging traditional workplace norms and seeking work-life balance in various ways.

(nypost.com)

Startup Gen Z workplace culture rebellion

NoDB: Processing Payments Without a Database

2024-12-21

NoDB: Processing Payments Without a Database

Alvaro Duran's "The Payments Engineer Playbook" introduces a revolutionary approach to payment system design: processing payments without a database. He argues that the prevalence of asynchronous programming stems from the assumption of database necessity. Using event sourcing, each step in the payment process is recorded as an event, not as a persistent state. These events are temporarily stored in memory, and the system reconstructs the payment status from the event stream, eliminating the need for persistent storage. This high-performance, high-reliability approach, inspired by high-frequency trading, allows for quick recovery from outages through hot backups. The article details this concept using a payment flow example and looks toward future applications in payment systems.

(news.alvaroduran.com)

Development Event Sourcing Databaseless Payments High-Frequency Trading

Carrier Battles the Internet: Connectivity Upgrade, Combat Power Multiplied

2025-02-02

Carrier Battles the Internet: Connectivity Upgrade, Combat Power Multiplied

During its Red Sea deployment, the USS Abraham Lincoln (CVN-72) used commercial satellite networks like Starlink and OneWeb to achieve unprecedented internet connectivity onboard. This significantly boosted F-35 fighter jet capabilities by enabling rapid intelligence data updates and design improvements, enhancing survivability and lethality. Beyond combat, it improved sailor quality of life, training efficiency, maintenance speed, and boosted morale. The initiative, Sailor Edge Afloat and Ashore (SEA2), is now a funded Navy program of record called Flank Speed Wireless, aiming to deliver high-speed, reliable global connectivity across the fleet.

(www.twz.com)

Tech Navy

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