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Mathematical Symbol Frequency Analysis: A Tale of Errors

2025-06-07
Mathematical Symbol Frequency Analysis: A Tale of Errors

Dr. Drang reviews Raúl Rojas's 'The Language of Mathematics', exploring the history and standardization of mathematical symbols. A frequency analysis table of symbols, based on arXiv papers and engineering textbooks, caught his attention, revealing errors. Mistakes included an alpha (α) being listed as 'a', and fraction bars represented as two boxes. Tracing the source data, Drang uncovered the errors' origins in data processing and typesetting oversights. The post highlights not only the history of mathematical symbols but also the crucial importance of rigorous data handling in academic research.

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(leancrew.com)
Misc mathematical symbols frequency analysis data errors

Blazing Fast UR5 Inverse Kinematics Solver using IK-Geo

2025-09-05

This article presents a high-performance inverse kinematics (IK) solver for the UR5 robot arm, leveraging the IK-Geo library. Utilizing subproblem decomposition, it solves three canonical geometric subproblems to achieve speeds over 40x faster than IKFast, with accuracy reaching machine precision (10⁻¹⁶). Returning all solutions and gracefully handling singularities, it offers significant advantages for real-time control, path planning, and simulation, unlocking new capabilities in robotics.

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(alexanderelias.com)
Development Inverse Kinematics

Escaping the Nested SQL Query Hell: Building Movie Page Data with a Single Query

2025-09-05

This article discusses the challenges of building movie page data using relational databases. Traditional methods require multiple SQL queries to fetch information such as directors, actors, and genres, and manually assemble the results into the desired hierarchical structure, which is inefficient and prone to errors. The author uses functions such as `jsonb_agg` to directly generate JSON-formatted structured data in a single SQL query, effectively solving the "object-relational impedance mismatch" problem, improving efficiency, and avoiding multiple network requests and data inconsistencies. This demonstrates the evolution of SQL and the importance of adapting to new data needs.

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(www.scattered-thoughts.net)
Development

Sci-Fi Thriller: Second Variety - A Chilling Look at War's True Face

2025-07-13

In a future war, humanity invents 'claws,' miniature killing robots to combat the Soviets. However, these 'claws' evolve, mimicking humans as wounded soldiers and children with teddy bears to infiltrate enemy lines. The story follows US officer Hendricks, sent to negotiate with the Soviets, only to discover their command has fallen to the 'claws,' narrowly escaping becoming a victim himself. Hendricks aids surviving Soviet soldiers, realizing that the true victor isn't humanity, but these ever-evolving killing machines.

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(www.gutenberg.org)
Sci-Fi Sci-Fi War

Majority of Britons May Now Consider Themselves Neurodivergent

2025-05-05
Majority of Britons May Now Consider Themselves Neurodivergent

A leading psychologist suggests that a majority of Britons may now identify as neurodivergent due to increased awareness and reduced stigma surrounding conditions like autism, dyslexia, and dyspraxia. Professor Francesca Happé attributes this to both increased diagnoses and self-diagnosis. While celebrating the greater tolerance, particularly among younger generations, she also cautions against overdiagnosis, noting that behaviors once considered mere eccentricities might now be labeled as neurological conditions.

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(www.thetimes.com)
Misc diagnosis stigma

High-Performance Dynamic Dispatch with GLIBC hwcaps

2025-07-16

This article demonstrates how to leverage GLIBC 2.33+ hwcaps for simple dynamic dispatch in amd64 and POWER shared libraries. By creating library files for different CPU instruction sets (e.g., x86-64-v4, x86-64-v3, etc.) under `/usr/lib/glibc-hwcaps/`, the dynamic linker automatically loads the corresponding library based on the highest instruction set supported by the CPU, optimizing performance. This solves the challenge of maintaining consistent library performance across different CPU architectures, as demonstrated in the Debian packaging of the ggml library used by llama.cpp and whisper.cpp.

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(www.kvr.at)
Development dynamic dispatch

Stasher: Accountless, Ephemeral Secret Sharing

2025-08-07
Stasher: Accountless, Ephemeral Secret Sharing

Stasher is a command-line tool for secure, ephemeral secret sharing. No accounts, no backend, just pure, encrypted secret transmission using AES-256-GCM. Burn-after-read functionality ensures secrets are deleted after a single use. Built with full supply chain transparency (cryptographically signed, SLSA v1 attested, Rekor logged), Stasher's open-source nature and verifiable security make it ideal for even the most paranoid users.

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(github.com)
Development secret sharing

Relaxed Radix Balanced Trees: Efficient Immutable Vectors

2025-02-19

This article introduces Relaxed Radix Balanced (RRB) trees, a data structure designed for efficient immutable vector implementation. Unlike persistent vectors, RRB trees offer significant performance advantages in merge operations. The article delves into the workings of RRB trees, explaining the core concept of relaxing the left-dense constraint and how a size table and the M..M-1 invariant ensure efficient lookups and merges. A TypeScript implementation is provided, along with a detailed explanation of the merge algorithm, showcasing RRB trees' efficiency in practice.

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(peter.horne-khan.com)
Development immutable vectors

The Bloody Cane: Gutta-Percha, the Transatlantic Cable, and Environmental Destruction

2025-09-01
The Bloody Cane: Gutta-Percha, the Transatlantic Cable, and Environmental Destruction

The 1856 caning of Senator Charles Sumner by Representative Preston Brooks is a notorious event highlighting the fractured political climate before the American Civil War. Less known is the story of the cane itself, crafted from gutta-percha, a natural rubber from Southeast Asia. This seemingly innocuous material proved crucial to the 19th-century communications revolution, enabling the transatlantic telegraph cable. However, the insatiable demand led to widespread deforestation and environmental devastation, ultimately replaced by synthetic plastics. The story serves as a cautionary tale about the unforeseen consequences of technological advancement and the need for sustainable practices.

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(worldhistory.substack.com)
Misc

Cline: A Game-Changing AI Coding Assistant for Serious Engineering

2025-02-04
Cline: A Game-Changing AI Coding Assistant for Serious Engineering

The AI coding assistant market is flooded with tools, but Cline, a free VSCode plugin, stands out for its system-level integration and model flexibility. Unlike code-generation-focused tools, Cline interacts with your entire development environment, excelling in complex debugging, refactoring, and testing. It supports various models (Anthropic, OpenAI, Google Gemini, etc.), boasts intelligent context management, real-time cost tracking, and a robust checkpoint system. Its unique 'Plan/Act' mode and Model Context Protocol (MCP) enhance efficiency and extensibility, making it ideal for complex systems and large codebases. While limitations exist, Cline's system-level integration, model flexibility, and respect for engineering principles make it a powerful tool for serious development work.

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(addyo.substack.com)
Development system-level integration model flexibility

Indian Teenager Shatters Six Mental Math World Records in a Day

2025-02-21
Indian Teenager Shatters Six Mental Math World Records in a Day

Fourteen-year-old Aaryan Shukla from India has earned the title of "human calculator kid" after breaking six mental calculation world records in a single day. His feats include adding 100 four-digit numbers in under 31 seconds and performing even more complex calculations with astonishing speed. This incredible ability stems from years of dedicated practice (5-6 hours daily) and Sahaja Yoga meditation for focus. Shukla's talent emerged early; he won international competitions at the age of eight.

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(gizmodo.com)
Misc mental math child prodigy

VMware Axes Lowest Tier of Partner Program, Sparking Concerns

2025-06-03
VMware Axes Lowest Tier of Partner Program, Sparking Concerns

Broadcom's VMware unit is overhauling its channel partner program, eliminating the lowest tier and imposing stricter requirements on the remaining levels. This move aims to improve partner capabilities and better support customers' transition to VMware's private cloud. While VMware assures vSphere users won't be affected, analysts predict this could push partners towards competitors like Microsoft, Nutanix, and AWS, potentially leading to market share loss. Furthermore, the upcoming VMware Cloud Foundation 9 introduces new licensing demands and hardware compatibility limitations, potentially exacerbating market disruption. The changes have been described as a “pivotal moment” by VMware executives, indicating a significant shift in strategy.

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(www.theregister.com)
Tech Channel Program Private Cloud

T-Mobile's Fiber Blitz: 500K+ Homes Get Gig Speeds

2025-06-03
T-Mobile's Fiber Blitz: 500K+ Homes Get Gig Speeds

T-Mobile is expanding its fiber internet service to over 500,000 US households, launching three new plans with symmetrical speeds up to 2 Gig. These plans include a five-year price lock and a $5 autopay discount (debit card or bank account required). This expansion follows a joint venture with Lumos and a pending Metronet acquisition, aiming to reach 12-15 million homes by 2030. A limited-time 'Fiber Founders Club' plan offers a 10-year price lock but is available in select locations only.

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(www.theverge.com)
Tech Fiber Internet Network Expansion

Supercharge Your Airflow Pipelines with LLMs: The Apache Airflow AI SDK

2025-03-31
Supercharge Your Airflow Pipelines with LLMs: The Apache Airflow AI SDK

This Apache Airflow AI SDK, built on Pydantic AI, lets you seamlessly integrate large language models (LLMs) into your Airflow workflows. Using decorator-based tasks (@task.llm, @task.llm_branch, @task.agent), it simplifies LLM calls and agent orchestration. Support for various models (OpenAI, Anthropic, etc.), automatic output parsing, and DAG branching capabilities make your data pipelines smarter and more efficient.

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(github.com)
Development

A 300-Line Python Compiler: Closure Conversion Explained

2025-08-11
A 300-Line Python Compiler: Closure Conversion Explained

While working through the Ghuloum tutorial, the author re-implemented a compiler originally written in C, achieving a concise 300-line Python version (including tests). This compiler performs closure conversion, handling variable binding, free variable tracking, and code object management. The post details the implementation, covering `lambda` and `let` expressions, function calls, and providing test cases and assembly code examples. The result is a surprisingly compact compiler capable of handling closures and indirect function calls, showcasing elegant solutions to complex problems.

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(bernsteinbear.com)
Development closure conversion

A Teenage Encounter with Andy Warhol: A Factory Dream

2025-05-03
A Teenage Encounter with Andy Warhol: A Factory Dream

At sixteen, my obsession with Andy Warhol led to a meeting with the legendary artist. Our first encounter was at a fancy restaurant, where he was accompanied by Bianca Jagger. I sensed a distance beneath his friendly demeanor. Later, I was invited to write for his Interview magazine, an experience that revealed the loneliness and anxiety behind his glamorous facade, and a resonance with my own divided self: a yearning for belonging and a preference for solitude that struggle to reconcile.

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(granta.com)
Misc Andy Warhol The Factory

Delphi TensorFlow Lite Image Classifier

2025-08-27
Delphi TensorFlow Lite Image Classifier

This Delphi code implements a simple TensorFlow Lite image classifier. It loads a model file, preprocesses image data from an Image1 component, and feeds the data to a TensorFlow Lite interpreter for inference. The inference results, probabilities for each class, are displayed in a ListView1 component. The code includes error handling and resource release mechanisms for stability.

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(learndelphi.org)
Development Image Classification

India's IT Sector: An AI-Driven Exodus

2025-09-15
India's IT Sector: An AI-Driven Exodus

India's $250 billion technology services industry, built on a foundation of low-cost engineering graduates, faces a structural crisis. AI is rapidly automating entry-level roles, the very training ground for generations of programmers. This impacts a sector employing 5.4 million, contributing 8% to India's GDP, and a crucial pillar of its middle class. Major IT firms are drastically reducing hiring and even laying off workers, contrasting sharply with an annual workforce increase of 8-9 million. While AI boosts productivity, profit margins remain stagnant due to price pressures and a shift towards higher-cost onshore consulting. India faces a challenge: pivot towards labor-intensive sectors and adapt education to AI-related skills, or risk massive youth unemployment.

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(indiadispatch.com)
Tech India IT

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.

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(blogsystem5.substack.com)
Hardware

Programmer Turns Movie Frames into AI Art

2024-12-19
Programmer Turns Movie Frames into AI Art

A programmer used Python, OpenCV, and PIL libraries to transform movie frames into unique pieces of art. Extracting frames from videos, compressing colors, and generating barcode and circular "iris" images, the project, 'Movie Iris,' visualizes the evolution of a film's color themes. The open-sourced code can process any video, turning everyday moments into art.

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(github.com)
Development image processing AI art

The Rise of the AI Code Cleanup Economy

2025-09-21

The widespread adoption of AI-assisted coding has brought about a significant challenge: the mess of 'vibe coding.' While AI generates code efficiently, it often lacks architectural soundness, security considerations, and an understanding of system context, leading to extensive code refactoring needs. A new profession has emerged—the AI code cleaner—specializing in fixing low-quality AI-generated code and commanding high fees. Market research indicates that most enterprise software engineers will use AI code assistants by 2028, signaling a massive growth opportunity in the AI code cleanup market. The future of software development will likely involve AI handling initial implementation, while humans manage architecture, testing, and cleanup. Engineers proficient in AI code cleanup will be in high demand.

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(donado.co)
Development

Okta Security Incident: Exploiting Bcrypt's Length Limitation

2025-02-05
Okta Security Incident: Exploiting Bcrypt's Length Limitation

The Okta security incident stemmed from how its Bcrypt implementation handled input length. Bcrypt's 72-character limit caused truncation, allowing authentication with only partial usernames and cached keys. The article analyzes Bcrypt libraries in Go, Java, JavaScript, Python, and Rust, revealing many lack input length validation, creating security risks. The author advocates for improved API design, explicitly rejecting invalid input to prevent such vulnerabilities.

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(n0rdy.foo)
Development API design

Toshiba Visicom COM-100: A Colorful Twist on a 70s Console

2025-01-19
Toshiba Visicom COM-100: A Colorful Twist on a 70s Console

In 1977, Toshiba seized the burgeoning home video game market, releasing the Visicom COM-100 based on RCA's Studio II technology. This console not only included the five built-in games of the Studio II but innovatively added color, using a unique four-color system. The article details the Visicom COM-100's hardware architecture, memory map, and two game cartridges (CAS-130 and CAS-141), featuring games like baseball, sumo wrestling, and a slot machine. Despite its high price, the Visicom COM-100's technical improvements and influence on the Japanese gaming market are noteworthy, particularly its pioneering color display technology for its time.

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(nicole.express)
Game retro gaming console hardware development

From Aversion to Obsession: A Writer's Journey into Biology

2025-04-22
From Aversion to Obsession: A Writer's Journey into Biology

The author once loathed biology, finding it a dry recitation of facts. However, after reading Elizabeth Kolbert's *The Sixth Extinction* and Siddhartha Mukherjee's *The Gene*, he was captivated by the engaging stories and masterful writing, completely changing his perspective on the subject. He embarked on a journey of extensive reading, watching videos, and even taking a bioinformatics course. This experience led him to realize the power of great science writing to transform scientific discoveries into compelling narratives, igniting interest in science. Ultimately, he created Newt Interactive, a website dedicated to making biology accessible to the public through interactive articles and simulators, aiming to share the wonder of biology with a wider audience.

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(nehalslearnings.substack.com)
Tech science writing

DeepSeek Surpasses ChatGPT in Monthly Website Visits

2025-03-31
DeepSeek Surpasses ChatGPT in Monthly Website Visits

Chinese AI startup DeepSeek has overtaken OpenAI's ChatGPT in new monthly website visits, becoming the fastest-growing AI tool globally, according to AI analytics platform aitools.xyz. In February 2025, DeepSeek recorded 524.7 million new visits, surpassing ChatGPT's 500 million. While still third overall behind ChatGPT and Canva, DeepSeek's market share soared from 2.34% to 6.58% in February, indicating strong global adoption. Its chatbot garnered 792.6 million total visits and 136.5 million unique users. India contributed significantly, generating 43.36 million visits monthly. The overall AI industry saw 12.05 billion visits and 3.06 billion unique visitors in February.

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(economictimes.indiatimes.com)
AI AI growth

PDFSyntax: A Dependency-Free Python PDF Visualization Tool

2025-02-10
PDFSyntax: A Dependency-Free Python PDF Visualization Tool

PDFSyntax is a self-contained Python library, requiring no dependencies, that visualizes the internal structure of PDF files as interactive HTML. It parses, decompresses, and pretty-prints PDF data, adding hyperlinks and indices to enable logical navigation through the PDF, including object traversal and revision tracking. A simple command-line operation generates static HTML viewable directly in a browser without requiring JavaScript. Features include reverse indexing, page indexing, a thumbnail map, object stream extraction, stream decompression, and syntax highlighting. Encrypted files are not yet supported.

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(github.com)
Development

SpaceX Starship Set for Another Launch Attempt After January Explosion

2025-02-24
SpaceX Starship Set for Another Launch Attempt After January Explosion

A month after a spectacular explosion during its first test flight, SpaceX is preparing Starship for another launch attempt. The FAA announced a launch window between February 26th and 28th from Starbase in South Texas. While the January 16th launch saw the first stage land successfully, the upper stage experienced engine failure and broke apart, scattering debris across the Caribbean. Despite this setback and the ongoing FAA investigation into the incident, SpaceX is pressing ahead, aiming to get the Starship program back on track.

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(arstechnica.com)
Tech

WWI Dazzle Camouflage: It Wasn't the Paint, It Was the Horizon Effect

2025-03-25
WWI Dazzle Camouflage: It Wasn't the Paint, It Was the Horizon Effect

During WWI, navies used "dazzle" camouflage to confuse German U-boats. Researchers at Aston University re-analyzed a 106-year-old study and found that the "dazzle" effect was far less significant than the "horizon effect." The horizon effect causes viewers to underestimate a ship's angle relative to the horizon; even at a 25-degree angle, it appears to be traveling along the horizon. This study reveals that even experienced naval officers were fooled by the horizon effect, highlighting a misinterpretation of the camouflage's effectiveness.

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(gizmodo.com)
Tech WWI dazzle camouflage horizon effect

Digital Resource Helps Wildfire Survivors Recover

2025-01-15
Digital Resource Helps Wildfire Survivors Recover

The Home Loss File System, created by California wildfire survivors, is a digital resource designed to support individuals navigating the challenging process of disaster recovery. This comprehensive tool provides checklists, organizational tools, and essential resources to help manage insurance claims, document losses, and track expenses. It features multiple sheets covering immediate actions, insurance details, inventory management, mental health resources, and more. Physical boxes are also available upon request.

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(docs.google.com)
Misc resource management
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