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Astonishing Discrepancies: A Comparison of Acceleration Structure Memory Usage Across GPUs

2025-04-02

This article benchmarks the memory consumption of building acceleration structures (BVHs) for ray tracing across different vendor GPUs. The results reveal significant discrepancies, with the latest NVIDIA GPUs using only one-third or even one-twentieth the memory of AMD counterparts. The article delves into the internal structure of BVHs, contrasting different driver implementations and hardware architecture effects. It analyzes the BVH implementation details of AMD's RDNA2/3 and RDNA4 architectures, explaining the reasons behind the memory usage differences. Finally, the author concludes that BVH memory consumption is heavily influenced by hardware, drivers, and algorithms, and projects future improvement potential.

(zeux.io)

Hardware acceleration structure

Muriel Spark: A Literary Game of Cat and Mouse with Her Biographer

2025-07-12

Muriel Spark: A Literary Game of Cat and Mouse with Her Biographer

Novelist Muriel Spark's invitation to Martin Stannard to write her biography was a carefully orchestrated game. Spark left behind a massive archive, a vast puzzle, which Stannard spent nine years piecing together, producing multiple drafts before completing the acclaimed biography. This article explores recurring themes in Spark's work: the control of life's beginnings and endings, and the complex relationship between author and biographer, mirroring the ghostly entanglements of her fiction. Spark's biographical journey mirrors the pattern of struggle in her novels, anticipating her own ending and weaving her life story into her interaction with her biographer.

(www.newstatesman.com)

Misc Muriel Spark

Beyond OpenEXR? A Novel Approach to Lossless Compression of Floating-Point Images

2025-07-14

ArasP delves into lossless compression techniques for floating-point images, particularly those with multiple channels. He benchmarks OpenEXR (including the new HTJ2K codec), JPEG-XL, and a custom method based on Mesh Optimizer. Results show OpenEXR with ZIP compression is practical, while HTJ2K offers slightly better compression but worse performance. JPEG-XL achieves higher compression ratios but is significantly slower. Surprisingly, the custom method using Mesh Optimizer and zstd outperforms others in both compression ratio and speed, emerging as a compelling alternative for floating-point image compression.

(aras-p.info)

Development

From Zero to Hero: A Freelancer's 2-Year Client Acquisition Journey

2025-02-25

From Zero to Hero: A Freelancer's 2-Year Client Acquisition Journey

A freelancer shares their two-year journey from landing their first client to building a small software services business. The article details their strategies for resume optimization, crafting a concise self-introduction, timing their job search, and utilizing productivity tools. They highlight the importance of quantifying achievements, preparing a two-minute self-introduction, targeting key hiring months, and leveraging tools to boost efficiency. Their progression from a two-year search for the first client to securing new clients in six months and then six weeks showcases valuable lessons for fellow job seekers.

(crocspace.substack.com)

Startup freelancing resume optimization

Training Robots with Pi0, Lerobot, and Rerun: A Human Pose Motion Retargeting Approach

2025-05-02

Training Robots with Pi0, Lerobot, and Rerun: A Human Pose Motion Retargeting Approach

This project explores training robots using Pi0, Lerobot, and Rerun. It supports Linux and utilizes the Pixi package manager. The project involves camera calibration, human pose and kinematics analysis, and extracting 3D joint positions and angles from multi-view images. The ultimate goal is to convert time-synced multi-camera footage into axis-angle joint parameters and 3D positions usable by robots for motion retargeting and learning fine motor skills. Jupyter Notebook tutorials are provided, covering human pose and kinematics, body and hand pose retargeting, and imitation learning and teleoperation.

(github.com)

Development motion capture

LLMs: The Unforeseen Cost of Easier Coding

2025-05-28

Large Language Models (LLMs) have revolutionized code writing, surpassing even the impact of the World Wide Web. However, this hasn't changed the fundamental truth that understanding code is harder than writing it; every line is tech debt. Introducing LLMs makes convincing teams to abandon old test suites and technical decisions even harder. LLMs readily produce new functions, leading to bloated, hard-to-maintain codebases, defying DRY principles. Historically productive engineering teams rely on deep toolchain expertise, but LLMs drastically lower coding costs, resulting in an explosion of ecological diversity in software environments. While LLMs might eventually improve code readability and reasoning, the current challenges are substantial.

(laughingmeme.org)

Development Code Writing Engineering Leadership

Water-Walking Robot Inspired by Ripple Bugs

2025-09-07

Water-Walking Robot Inspired by Ripple Bugs

Scientists have created a tiny robot called Rhagobot, inspired by Rhagovelia water striders (also known as ripple bugs). These semiaquatic insects glide effortlessly across water thanks to unique fan-like appendages on their middle legs. Rhagobot mimics this adaptation, using passively morphing structures that adjust to water flow for propulsion. The five-year study, published in Science, reveals the previously unknown intricate structure of the water strider's legs and provides insights into developing self-morphing artificial propellers for semi-aquatic robots.

(arstechnica.com)

Tech water striders

Rebuilding the American Dream: A Pledge for Guaranteed Minimum Income

2025-03-21

Rebuilding the American Dream: A Pledge for Guaranteed Minimum Income

This article recounts the author's family's pledge to donate a significant sum to fund a Guaranteed Minimum Income (GMI) initiative in rural America. Driven by concerns about rising wealth inequality and a re-evaluation of the 'American Dream,' the author argues GMI is not charity but an investment in untapped American potential. By empowering the poorest communities, the plan aims to foster community growth and social equity. Partnering with organizations like GiveDirectly and OpenResearch, the initiative will pilot GMI programs in impoverished counties, seeking broader collaboration to ultimately rebuild the American Dream, ensuring everyone has an equal chance to pursue happiness.

(blog.codinghorror.com)

Startup Guaranteed Minimum Income

Undecidability in Physics: Even a God's-Eye View Can't Predict the Future

2025-03-07

Undecidability in Physics: Even a God's-Eye View Can't Predict the Future

Could Laplace's demon predict the future of the universe? Quantum mechanics, chaos theory, and recent research on 'undecidability' suggest the answer is no. Even with perfect information, the future of certain physical systems is unpredictable. The article uses Cris Moore's pinball machine as a vivid example of undecidability, which transcends chaos, meaning some questions are simply unanswerable, even for a demon with infinite computing power. This research reveals the boundaries of physical knowledge and has profound implications for our understanding of the universe.

(www.quantamagazine.org)

Tech chaos theory undecidability

Korean Air's $50B Boeing Deal: A Giant Leap for Growth

2025-08-27

Korean Air's $50B Boeing Deal: A Giant Leap for Growth

Korean Air announced a massive $50 billion deal with Boeing, its largest-ever investment, to purchase 103 next-generation aircraft, spare engines, and long-term engine maintenance contracts. The agreement, signed during President Lee Jae Myung's visit to Washington, includes various Boeing models (777-9, 787-10, 737-10, and 777-8F freighters) and strengthens ties with the US aviation industry. This strategic move aims to fuel post-Asiana Airlines merger growth, streamline its fleet for improved efficiency and lower emissions, and enhance customer experience.

(www.koreaherald.com)

Tech Aviation International Deal Strategic Investment

Tail Recursion: The Equivalence of Loops and Recursion

2025-08-12

This article delves into the equivalence of recursive functions and loops, focusing on tail-call optimization. Recursive functions are elegant and easy to reason about, but generally slower due to stack usage for intermediate results. Loops are faster but can be less readable. Tail recursion, where the recursive call is the last operation, allows compilers to optimize it into a loop, preventing stack overflow and improving performance. The article uses example code to compare recursive, iterative, and tail-recursive implementations of a summation function, and concludes with exercises to solidify understanding.

(kmicinski.com)

Development tail recursion loops

Trump's Retaliatory Tariffs: A Calculation Error Sparks Economic Storm

2025-04-05

Trump's Retaliatory Tariffs: A Calculation Error Sparks Economic Storm

In 2025, President Trump announced retaliatory tariffs of up to 50% on nearly every country, based on a formula tied to trade deficits and claimed to be 'reciprocal'. However, this formula contained a significant error, overestimating foreign tariffs and leading to far higher actual US tariffs. This sparked a stock market plunge and recession fears. Experts point out that correcting the formula would drastically reduce the tariffs, but the underlying economic rationale remains questionable.

(www.aei.org)

Tech

Secrets of the CN Tower: A Behind-the-Scenes Look at the Broadcast Facility

2025-04-17

This post offers a rare glimpse behind the scenes of Toronto's CN Tower, focusing on its broadcast facilities. The author, a former radio station engineer, shares photos from their time working there, showcasing the security office, diesel generator room, Sinclair cavity tuners combining numerous radio signals, vintage and modern transmitters of CKFM and CHUM radio stations, and the massive Marconi combiner. The article also details unique architectural features, such as the now-removed exterior staircase featured in the movie 'Canadian Bacon'. It's a fascinating look at the technology and history behind the CN Tower's broadcast system.

(site.roadwolf.ca)

Tech CN Tower Broadcast Facility

Peter Thiel: The Shadowy Power Broker of Silicon Valley

2025-03-05

Peter Thiel: The Shadowy Power Broker of Silicon Valley

PayPal co-founder Peter Thiel, a conservative tech billionaire, is known for his media takedowns, tax avoidance, and secretive power plays. A new biography, *The Contrarian*, reveals his ambitions extend far beyond mere wealth. Thiel is arguably Silicon Valley's most important behind-the-scenes player, having shaped Facebook and Mark Zuckerberg's leadership style. His early involvement with cryptocurrency and advocacy for decentralization continue to resonate. However, Thiel's anti-democratic leanings and extreme focus on efficiency have raised concerns about his political philosophy, even drawing accusations of fascism. His support for Trump and substantial donations to Republican candidates highlight his attempt to shape the future of technology through political influence. The author concludes by expressing concern about the potential impact of 'Thielism,' a threat to democratic and institutional norms.

(time.com)

Startup Peter Thiel

YouTube: The Unexpected Podcast King

2025-02-26

YouTube: The Unexpected Podcast King

YouTube has become the leading platform for podcast consumption in the US, leveraging its video capabilities to offer a superior user experience. By improving discoverability, expanding its revenue-sharing program, and offering access across various devices (including TVs), YouTube has captured a massive audience. With over 400 million hours of podcasts watched monthly on living room devices alone, the platform's success highlights the growing trend of video podcasts. From sports talk shows to true crime, YouTube is home to a diverse range of podcasts and continues to invest in making it the best podcast destination.

(blog.youtube)

Tech Video Podcast

3D Kakeya Conjecture Cracked: A Towering Achievement in Harmonic Analysis

2025-03-15

3D Kakeya Conjecture Cracked: A Towering Achievement in Harmonic Analysis

Mathematicians Wang and Zahl have solved the long-standing three-dimensional Kakeya conjecture, a problem deeply connected to the Fourier transform. Their proof is likened to building a 'tower of dreams,' resolving a series of interconnected problems in harmonic analysis. Their ingenious method, akin to perfecting a perpetual motion machine, iteratively improved bounds until reaching the three-dimensional solution. This breakthrough opens doors to tackling higher-dimensional problems and marks a significant advancement in the field.

(www.quantamagazine.org)

Tech Harmonic Analysis

Broadcom's VMware Acquisition: A Resounding Success Fueled by AI

2025-03-07

Broadcom's VMware Acquisition: A Resounding Success Fueled by AI

Broadcom announced stellar Q1 2025 results, boasting a 25% year-over-year revenue increase to $14.92 billion and a staggering 315% surge in net income to $5.5 billion. The integration of VMware proved highly successful, with its infrastructure software business reaching $6.7 billion in revenue. This growth is attributed to the successful upselling of VMware Cloud Foundation (VCF) to a majority of its top 10,000 customers and strategic pricing adjustments. Furthermore, Broadcom secured two new hyperscale clients for its custom AI accelerators, driving AI-related revenue to $4.1 billion—a 77% year-over-year increase. Despite market fluctuations and tariff concerns, Broadcom's stock price rebounded, and CEO Hock Tan confirmed no immediate plans for further acquisitions.

(www.theregister.com)

Tech Broadcom

arXivLabs: Experimental Projects with Community Collaboration

2025-03-08

arXivLabs is a framework enabling collaborators to develop and share new arXiv features directly on the website. Individuals and organizations involved uphold arXiv's values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only partners with those who share them. Have an idea to enhance the arXiv community? Learn more about arXivLabs.

(arxiv.org)

Development

Sony Raises PS5 Prices in the US

2025-08-20

Sony Raises PS5 Prices in the US

Due to the challenging global economic climate, Sony has announced a price increase for PlayStation 5 consoles in the US, effective August 21st. The new recommended retail prices are: PS5 - $549.99, PS5 Digital Edition - $499.99, and PS5 Pro - $749.99. Accessory prices remain unchanged, and no other price adjustments have been announced for other regions.

(blog.playstation.com)

Game

Shingles Vaccine Linked to Lower Dementia Risk

2025-03-23

Shingles Vaccine Linked to Lower Dementia Risk

Studies published in summer 2024 revealed a surprising correlation: individuals vaccinated against shingles showed a reduced risk of developing dementia. Research from Stanford University, analyzing data from Britain and Australia, suggested the original shingles vaccine could prevent roughly one-fifth of dementia cases. Further studies by GSK and British academics indicated that a newer, recombinant vaccine offered even greater protection against dementia. This unexpected finding opens exciting new avenues for dementia prevention.

(www.economist.com)

Tech Shingles Vaccine Prevention

Project Hyperion: Winning Designs for a 250-Year Interstellar Voyage

2025-08-07

The Initiative for Interstellar Studies (i4is) has announced the winners of its Project Hyperion design competition. The challenge tasked interdisciplinary teams with designing a generation ship for a 250-year journey to a habitable exoplanet. Winning designs focused on creating a self-sustaining ecosystem capable of supporting 1000±500 people for centuries, addressing challenges like artificial gravity, resource management, and cultural preservation. This competition highlights the crucial role of interdisciplinary collaboration in tackling the complexities of interstellar travel.

(www.projecthyperion.org)

Tech generation ship space design

Coconut Action Party: Uncovering the Secrets of Malaya's WWII Stamps

2025-05-09

Coconut Action Party: Uncovering the Secrets of Malaya's WWII Stamps

Lin Yangchen's 'Coconut Action Party' delves into the unique coconut-themed postage stamps of Malaya during World War II. The book covers the design, printing, wartime forgeries and usage, and post-war stamp issues across various colonies and Malay states. Through meticulous analysis of materials, colors, designs, and security markings, it reveals the unique postal system and social changes of this historical period. The book also utilizes advanced technology, such as scanning electron microscopy and Raman spectroscopy, for in-depth stamp analysis, offering invaluable resources for collectors and history enthusiasts.

(www.linyangchen.com)

Misc stamps Malaya

Austin Rents Plummet: A Construction Boom's Unexpected Consequence

2025-01-26

Austin Rents Plummet: A Construction Boom's Unexpected Consequence

Austin rents have been falling for nearly two years, a stark contrast to the pandemic-era surge. A massive apartment building boom in the Austin-Round Rock area has flooded the market with tens of thousands of new units, creating a surplus that's driven down rental costs. While this offers some relief, housing affordability remains a significant challenge, with many renters still heavily burdened by housing expenses. The construction boom itself was fueled by a shift in political attitudes towards housing development, with city officials becoming more supportive of new projects.

(www.texastribune.org)

Tech Austin rents apartment construction housing crisis

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

Tesla's European Sales Crash: Model Y Transition and the Musk Effect

2025-02-12

Tesla's European Sales Crash: Model Y Transition and the Musk Effect

Tesla's January sales in Germany plummeted nearly 60% year-over-year, mirroring a broader European slump. The downturn is attributed to the Model Y transition and negative sentiment surrounding Elon Musk's political actions. While the overall German auto market declined only 2.8%, the electric vehicle market grew by 53.5%, highlighting Tesla's unique challenges. While Tesla will likely cite the Model Y transition, the 'Musk effect' is undeniable, potentially impacting the entire EV industry.

(electrek.co)

Tech

Scrappy: Building Home-Grown Apps for Friends and Family

2025-06-18

Scrappy: Building Home-Grown Apps for Friends and Family

John and Pontus created Scrappy, a research prototype for making simple, personalized apps for yourself and your friends. It's a visual tool similar to Figma or Google Slides, but allows attaching behaviors to interactive objects. You drag and drop objects like buttons and text fields, and add JavaScript code to define their actions, like recording text input on a button click. Scrappy apps are multiplayer, with persistent and synced state, making collaboration with friends and family seamless. The goal is to democratize software creation, enabling more people to build apps tailored to their unique needs.

(pontus.granstrom.me)

Development low-code development personalized apps

Puck v0.18 Released: New Drag-and-Drop Engine with CSS Grid & Flexbox Support

2025-01-25

Puck v0.18 Released: New Drag-and-Drop Engine with CSS Grid & Flexbox Support

The open-source visual page builder Puck has released v0.18, featuring a brand-new drag-and-drop engine with full CSS Grid and Flexbox support for advanced layouts. This release also includes dynamic DropZone height adjustment, an interactive hotkey, a parent selector, and removes restrictive styling for easier embedding. Improvements and deprecations to components and properties are also included; see the changelog for details.

(github.com)

Development Page Builder Drag-and-drop Engine

RenderFormer: Global Illumination Neural Rendering without Per-Scene Training

2025-06-01

RenderFormer is a neural rendering pipeline that directly renders an image from a triangle-based scene representation with full global illumination effects, requiring no per-scene training or fine-tuning. Instead of a physics-based approach, it formulates rendering as a sequence-to-sequence transformation: a sequence of tokens representing triangles with reflectance properties is converted into a sequence of output tokens representing small pixel patches. It uses a two-stage transformer-based pipeline: a view-independent stage modeling triangle-to-triangle light transport, and a view-dependent stage transforming ray bundles into pixel values guided by the view-independent stage. No rasterization or ray tracing is needed.

(microsoft.github.io)

AI global illumination

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

Running x86_64 Apps on an AArch64 Desktop: A FEX-Emu Experiment

2025-08-07

Running x86_64 Apps on an AArch64 Desktop: A FEX-Emu Experiment

This post details an experiment running x86-64 applications on an Ampere Altra-based AArch64 desktop system using FEX-emu. While Steam and Factorio ran, performance was poor, scoring a measly 459 and 4110 on Geekbench 6's single and multi-core tests respectively. Optimizations to FEX-emu's configuration and replacing the x86_64 version of the Ninja build tool with an aarch64 version yielded some performance improvements. Ultimately, the author concludes that x86_64 emulation on this AArch64 system is limited in practicality, primarily useful for running older games.

(marcin.juszkiewicz.com.pl)

Development x86_64 emulation

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