Electron band structure in germanium, my ass (2001)

https://pages.cs.wisc.edu/~kovar/fittedHall.gif
The user's experiment on germanium resistivity vs temperature found no exponential dependence as expected. Instead, they found noise and issues with equipment and lab support.

Show HN: Nue – Apps lighter than a React button

https://nuejs.org/img/react-button-vs-nue-spa-big.png
Nue is a web framework that uses modern web standards to simplify complex web development. It emphasizes a model-first approach, true static typing, and minimal dependencies for a cleaner architecture.

The April Fools joke that might have got me fired

The author pulled a practical joke on their university campus by changing the READY message on networked printers to INSERT 5 CENTS, making it seem like they required a nickel deposit per page. The joke was discovered by university administration and caused chaos, but was eventually dropped after the author apologized and made amends.

Bletchley code breaker Betty Webb dies aged 101

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Charlotte "Betty" Webb, a 101-year-old decorated World War Two code breaker, has died. She was a last surviving Bletchley code breaker and received France's highest honour, the Légion d'Honneur, in 2021.

Show HN: Duolingo-style exercises but with real-world content like the news

https://app.fluentsubs.com/logo_og.webp
Turns language learning into an adventure. Watch anything you love—news clips, music videos, or influencer content—while mastering vocabulary and building fluency with precision. Personalize your journey and learn your way, with quality and engaging content at the heart of every lesson.

Why F#?

The author, who previously used Java and OCaml, has recently discovered F#, a functional programming language developed by Microsoft, and found it to be a great choice for ad-hoc scripts and a viable option for client-side programming. F# is a robust and niche language that is unlikely to become very popular, but it has a great community and is a good fit for data analysis, backend services, ...

Glubux's Powerwall (2016)

https://secondlifestorage.com/data/attachments/4/4962-d05b680bb3106d395e40c49ccf4d9222.jpg
User tested lithium power for a week, noticing better charge efficiency and predictable voltage drop. They encountered a voltage drop issue due to uneven cell counts in packs, which was resolved by rebalancing.

CERN scientists find evidence of quantum entanglement in sheep

https://cds.cern.ch/images/CERN-PHOTO-201706-157-2/file?size=large
Scientists at CERN found evidence of quantum entanglement in sheep, allowing them to move and vocalise simultaneously. This phenomenon is similar to subatomic particles and has implications for ovine research and quantum physics.

Don’t let an LLM make decisions or execute business logic

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LLMs should be used as a user interface to translate user input into API calls and translate results back into text. They should not implement logic, as they are slow, hard to debug, and lack transparency.

DEDA – Tracking Dots Extraction, Decoding and Anonymisation Toolkit

https://opengraph.githubassets.com/0b45744a4909f2899fe11b469d5a38ff83b2b89b2b545d1a4b5f3c1334d27b8b/dfd-tud/deda
The document colour tracking dots are small systematic dots that encode information about the printer and printout, and can be read and decoded from a scanned image. A software tool called deda allows anonymisation of these dots to prevent tracking, and can also create custom tracking dots and anonymisation masks.

The case against conversational interfaces

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The author argues that conversational interfaces are not a replacement for existing computing paradigms due to their inconvenience and inferior data transfer speeds.

Netflix’s Media Production Suite

Netflix developed the Media Production Suite (MPS) to streamline media management logistics and enable creative storytelling. MPS uses cloud-based workflows, automation, and open standards to eliminate tedious tasks and enhance global collaboration.

Ask HN: Who is hiring? (April 2025)

1-2 days/week in person, in brooklyn, and the rest remote. bloomberg is hiring experienced software engineers to build high-performance infrastructure that powers real-time financial data for global markets. trunk is an a16z funded dev tools startup, redefining software development at scale. if you're excited about building meaningful products in the real estate space from the ground up ...

The Myst Graph: A New Perspective on Myst

cle1::1743810301-ifZRIFon43V0Omz3Wor8dYN4eq9Wvz9U

Shared DNA in Music

https://pudding.cool/2025/04/music-dna/assets/tree.jpg
Songs have a far more complex and concealed musical history, spanning genres, cultures, and even centuries.

Dave Täht has died

https://i0.wp.com/libreqos.io/wp-content/uploads/2025/04/Dave.webp?resize=150%2C150&ssl=1
Dave was a brilliant man who helped the world with FQ-CoDel and CAKE, improving internet connectivity for millions. His contributions enabled reliable video calls, telemedicine, and human connection worldwide.

How Silica Gel Took Over the World

https://www.scopeofwork.net/content/images/2025/03/silica-2---1.jpeg
Silica gel packets are used to control humidity in packaged goods and are often found in unexpected places. They work by adsorbing water vapor through tiny pores, allowing them to maintain a stable humidity level.

US accidentally sent Maryland father to Salvadorian prison, can't get him back

https://static.independent.co.uk/2025/03/31/22/EEUU-DEPORTACIONES_33488.jpg
The Trump administration accidentally sent a Salvadorian immigrant to a notorious prison in El Salvador despite his protected immigration status. The man's family is seeking court orders to have him returned to the US and for the government to stop paying for his detention.

Self-Hosting like it's 2025

https://kiranet.org/content/images/size/w1200/2025/04/ECPrscy.gif
The user discusses self-hosting alternatives to big-brother services, focusing on container runtimes like Docker, Podman, and Kubernetes. They highlight web-based tools like Portainer and Dockge for managing containers.

Show HN: Qwen-2.5-32B is now the best open source OCR model

https://camo.githubusercontent.com/628b0587ccd21fe4c90b6d165c5ab572fd0a2a1c78d59c4ce1587d2cc6f79d17/68747470733a2f2f6f6d6e6961692d696d616765732e73332e75732d656173742d312e616d617a6f6e6177732e636f6d2f6f6d6e692d6f63722d62656e63686d61726b2e706e67
A benchmarking tool compares OCR and data extraction capabilities of large multimodal models like gpt-4o, evaluating text and JSON extraction accuracy. The tool measures accuracy using JSON-diff and Levenshtein distance, with a focus on JSON extraction from documents.

The state of binary compatibility on Linux and how to address it

Linux binary compatibility is plagued by the chaotic mix of different services, libraries, and philosophies across various distributions, making it difficult to ship software that "just works." The authors propose breaking down the GNU C Library (GLIBC) into smaller, more focused components and using the Relaxation Approach to link against older system libraries, which would greatly improve ...

Ask HN: Why hasn’t AMD made a viable CUDA alternative?

AMD needs significant resources to compete with NVIDIA's CUDA, but the potential reward is substantial due to the large market gap. Investing in thousands of engineers could be a worthwhile investment to close the gap.

Testing DVD-R and CD-R 25 years later: optical disks from Japan

https://goughlui.com/wp-content/uploads/2025/03/202503202113501963.jpg
The dh16a6l sees no issue at all with the burn – a smooth readback and very reasonable amount of c1 errors. despite being made in japan, this disc is rated at 4x and the read/write quality is excellent - although dips from the write could be attributed to more dye spatter which previously showed up in the ricoh 2.4x discs....... which was also made from japon

Systems Correctness Practices at AWS: Leveraging Formal and Semi-Formal Methods

Aws strives to deliver reliable services that customers can trust completely. formal methods include theorem proving, deductive verification,18 and model checking,19 fuzzing,9 and runtime monitoring,10 - samuel desai and dr. jimmy zufferey et al. found that 92 percent of catastrophic failures in tested distributed systems were triggered by incorrect handling of nonfatal

RubyUI (Former PhlexUI): Ruby Gem for RubyUI Components

https://repository-images.githubusercontent.com/715767201/e7aba3f9-7e2c-4edb-8f55-c250d053fbcd
RubyUI is an open source collection of reusable UI components that can be customized and copied into apps for speed and accessibility. It leverages Phlex for fast rendering and Tailwind utility classes for customization.

Show HN: Offline SOS signaling+recovery app for disasters/wars

https://repository-images.githubusercontent.com/873617127/2a869e32-2e16-488a-9d69-ca799e7a2491
Igatha is an open-source SOS app for war zones and disaster areas that enables offline emergency communication. It uses BLE and location permissions for automated disaster detection and transparency through open-source code.

Show HN: A Chrome extension to give you back control over short-form videos

https://lh3.googleusercontent.com/B3ExgYMNtxHS6hMSi6bjm6bPx1F8pjtVoB-2F8brbR18Nxn2A2lSs9X0HPZtxIF6_goePGRRUk8kgGYMhdqkcrnh=s275-w275-h175
ReelControl adds a progress bar and playback controls to social media videos, allowing users to know video length, rewind, and skip ahead. It's an open-source extension available on GitHub, built to help users take back control of their video experience.

We can, must, and will simulate nematode brains

https://asteriskmag.com/media/pages/issues/09/we-can-must-and-will-simulate-nematode-brains/6567a858a7-1737579357/skuhersky-04.png
Simulating the human brain is a long-term goal that could offer profound implications for humanity, but it's a complex task that requires significant advances in computational resources and understanding of neural networks. Recent breakthroughs in microscopy and machine learning may finally make it possible to simulate the brain of a simple organism like C. elegans, which could serve as a ...

'A hostile state': Why some travellers are avoiding the US

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Canadians are boycotting US travel due to President Trump's policies, with over 20% fewer border crossings in February. This could result in $2.1bn in lost spending and 14,000 job losses in the US.

An 'Administrative Error' Sends a Maryland Father to a Salvadoran Prison

https://cdn.theatlantic.com/thumbor/TAhEMH70CNW7Nh7z2PrpxfzQDAs=/0x0:3000x1688/960x540/media/img/mt/2025/03/25_3_garcia_elsalvador-1/original.jpg
The Trump administration admitted to mistakenly deporting a Maryland father with protected legal status to El Salvador due to an administrative error. The government claims US courts lack jurisdiction to order his return from a Salvadoran prison.

Tell HN: Camelgate NPM Outage (Cloudflare)

Cloudflare's WAF ruleset change blocks URLs with 'camel' due to a security rule. AI Startup School is happening June 16-17 in San Francisco.

Show HN: Zig Topological Sort Library for Parallel Processing

https://opengraph.githubassets.com/34c2da483eed551d739c94cc34036f15e36d87076a23d150bf2f2a87d36a6afb/williamw520/toposort
TopoSort is a Zig library for topological sort on dependency graphs with features like CLI tool and parallel processing. It uses a simpler data structure for positive integer node values, resulting in faster performance.

Silicon Valley, Halt and Catch Fire, and How Microserfdom Ate the World (2015)

https://grantland.com/wp-content/uploads/2015/06/silicon-valley-illo.jpeg?w=1024
Alan borsuk: douglas coupland's novel is about the spiritual yearnings of young coders. in microserfs, those unused belief-muscles find purpose again through faith in bill - he says oscar-winning writer argues that the idea of cutting the corporate cord to work for start-ups has been superseded twice in the culture, bourn writes.

Entire staff at federal agency that funds libraries and museums put on leave

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IMLS staff is on 90-day paid leave after a meeting with agency leadership. The agency's future and grants are uncertain due to staff absence and potential federal funding cuts.

How AI is creating a rift at McKinsey, Bain, and BCG

https://the-ken.com/wp-content/themes/the-ken/assets/assets_3_0/assets/pricing-grid-item-app-access.png
The website offers long-form stories, newsletters, and podcasts on India's startup ecosystem and tech industry. It provides free and premium content on various topics including e-commerce, fintech, and edtech.

Show HN: Terminal dashboard that throttles my PC during peak electricity rates

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User built a workstation with dual Epyc CPUs and 4 GPUs to run LLM workflows efficiently while minimizing energy consumption. They created a CLI tool called WattWise to monitor power usage and automatically adjust system performance during peak hours to save electricity.

Donkey Kong champion wins defamation case against Australian YouTuber Karl Jobst

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A YouTuber in Queensland was ordered to pay $350,000 plus interest and costs to a former Donkey Kong world record holder for defaming him with false claims. The court found the YouTuber acted "recklessly" and severely damaged the record holder's reputation.

Doge Is Trying to Gift Itself a $500M Building

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DOGE-affiliated officials have taken control of the US Institute of Peace, firing staff and attempting to transfer its $500 million headquarters to the General Services Administration. A lawsuit seeks to stop the transfer, with a judge set to decide on Tuesday.

LLM providers on the cusp of an 'extinction' phase as capex realities bite

https://regmedia.co.uk/2025/03/31/shutterstock_extinct2.jpg
Gartner forecasts a consolidation in the large language model market due to high costs and competition. The market will likely see a slower pruning of companies, with AI services experiencing the most rapid growth.

Launch HN: ASim (YC S21) – Mobile app that generates mobile apps

Daniel and Daniel from aSim created a mobile app that generates shareable mobile apps from your phone using LLMs, aiming to make it easy to build prototypes and fun apps. aSim is currently free to use and they're looking for feedback on features and problems with app generations.

Ukrainian Soldiers Unearth Ancient Greek Burial

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Ukrainian soldiers discovered an ancient Greek burial site in southern Ukraine with ritual objects and human remains. Experts believe the buried individuals held high social status due to the intact condition of the vessels.

Show HN: Textcase: A Python Library for Text Case Conversion

https://opengraph.githubassets.com/c03c6d204cac399126564f7f19ac52fe795f7bf2e410ba95f0dbf3f3e4f1d9d4/zobweyt/textcase
The textcase library converts text between different cases, including snake, constant, kebab, camel, pascal, lower, upper, title, and sentence. It also allows custom case conversion and boundary specification.

Why Does Claude Speak Byzantine Music Notation?

https://fi-le.net/byzantine/images/claude1.png
Researchers tested transformer models' ability to learn and apply Caesar ciphers, finding they can infer and apply offsets with high accuracy for common offsets. However, models struggle with uncommon offsets, but surprisingly, a specific Unicode cipher with an offset of 118784 works well due to a linear property in the tokenizer.

Windows on ARM on a Smart Watch

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A developer has successfully run Windows on ARM on a Google Pixel Watch 3, using a modified UEFI environment. The project is an April Fools' experiment, but the developer plans to release updates for Surface Duo and other Snapdragon devices.

Jargonic: Industry-Tunable ASR Model

https://aiola.ai/wp-content/uploads/2025/04/%D7%99%D7%9F.png
Jargonic is a new ASR model that handles industry-specific language and real-world noise with advanced domain adaptation and keyword spotting. It outperforms competitors in transcription accuracy and keyword detection across multiple languages.

BYD sales soar as Tesla continues to struggle in Europe

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Show HN: Make SVGs interactive in React with 1 line

Svggles is a React utility package for creating interactive illustrations using SVGs. Svggles is published as the `interactive-illustrations` npm package.

Why are credit card rates so high?

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Credit card interest rates are high due to banks' significant pricing power and high operating expenses. The rates also reflect compensation for undiversifiable default risk.

The Colors of Her Coat

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The author reflects on how technology has made art, music, and experiences more accessible but also less meaningful. They worry that AI will further cheapen our appreciation for beauty and wonder.

AR Computers to Terminate Eyestrain and Myopia

https://eyewiki.org/w/images/thumb/8/87/NED_.jpg/259px-NED_.jpg
Augmented reality smart glasses use Near-Eye Display technology to project images directly onto the retina, reducing eye strain. This technology can potentially prevent asthenopia and myopia by allowing the eyes to receive two light sources at the same time.

How Airbnb measures listing lifetime value

https://miro.medium.com/v2/da:true/resize:fit:1200/0*JSoY6CDkTMQEFXgP
Airbnb calculates listing lifetime value to identify valuable listings for guests and develop resources for hosts. The framework estimates baseline, incremental, and marketing-induced incremental LTV to measure listing value and impact of internal initiatives.

Globe Gores

https://blogs.loc.gov/maps/files/2025/03/Oterschaden-Gores-1879-crop.jpg
The Geography and Map Division holds a collection of printed globe gores from the 16th to 20th centuries, including early examples by Martin Waldseemüller and Gerard Mercator. Globe gores are pre-assembled map strips used to construct globes, with features like equatorial coordinates and ecliptic lines becoming common over time.

A look back: WordPerfect on DOS (2023)

https://technicallywewrite.com/images/2023/07/wordperfect2.png
WordPerfect was a dominant word processor in the 1980s, known for its innovative features and user-friendly interface. It rose to fame with its first version in the late 1970s and remained popular until the 1990s when it lost market share to Microsoft Word.

Xiaomi Car with Driver Assistance Crashes, Three Reported Dead

https://assets.bwbx.io/images/users/iqjWHBFdfxIU/iMqiJi3FXQdc/v0/-1x-1.webp
Connecting decision makers to a dynamic network of information, people and ideas, Bloomberg quickly and accurately delivers business and financial information, news and insight around the world Connecting decision makers to a dynamic network of information, people and ideas, Bloomberg quickly and accurately delivers business and financial information, news and insight around the world

Netflix CEO Says Movie Theaters Are Dead

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Netflix co-CEO Ted Sarandos says movie theaters are unlikely to return due to the post-Covid rebound of live events. He views YouTube as a place to develop ideas before coming to Netflix for better monetization and financial security.

An e-bike that charges off USB-C

https://platform.theverge.com/wp-content/uploads/sites/2/2025/03/Nova-Pro_-USB-C-closeup.jpg?quality=90&strip=all&crop=0%2C0%2C100%2C100&w=2400
Ampler's Nova and Nova Pro e-bikes have a USB-C port for charging and can be charged in three hours from a 140W charger. They are available for preorder in the UK, EU, and Switzerland with a two-year warranty and 14-day return policy.

Measuring Acceleration Structures

https://zeux.io/images/blas_1.jpg
Hardware accelerated raytracing relies on an abstract data structure, known as “acceleration structure” or “bls”. the driver is responsible for building shader code that iterates over the scene, using the special instructions for node tests. with fp32 box nodes, we estimate that bvh can take a minimum of 114 bytes/triangle on amd hardware; the largest number we can see from the official driver

Tips for Travelers Entering the U.S. Now: Check Your Visa, Turn Off Your Phone

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Show HN: CSS Clicker – a pure-CSS idle game where you build your own website

https://lyra.horse/css-clicker/flatron2.png
Users viewed various customization options including custom cursors, badges, and design systems. They also viewed sections and pages for gaming, guestbook, and contact information.

Ask HN: Are Squarespace and Wix sites worth it?

The user, a 20-year web developer, finds that website builders like Wix and Squarespace are beneficial for clients with simple needs, offering ease of use, reliability, and affordability, but may not be suitable for more complex projects. The user notes that while there are no SEO penalties, these services can be inflexible and expensive, and may not offer the same level of customization as ...

How Big Is OpenVMS?

https://vmssoftware.com/images/blog/2025-03-31-How-Big-Is-VMS.jpg
The author counted lines of code in 15 VMS facilities, totaling nearly 2 million lines across four releases, with a 400,000 line increase per release. The codebase has shifted from BLISS and MACRO-32 to mostly C, with some facilities showing significant changes over time.