Hitachi launches CO2 heat pump water heaters with solar-friendly tariff controls

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Hitachi introduces Y-series EcoCute CO2 heat pump water heaters in Japan with 370-liter and 460-liter models launching in November 2026. The new range supports daytime electricity tariffs and PV-linked energy management with a five-year manufacturer warranty.

Show HN: The same nine streaming subscriptions cost $702/year more than in 2021

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The cost of nine major streaming services increased by 61% from $95.91 to $154.41 per month over the past five years, with each service rising in price at its own pace. The total annual increase is $702, with individual services experiencing varying percentage increases ranging from 23% to 138%.

What algorithm did Windows XP use to choose your initial user picture?

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Windows XP uses a one-pass random selection algorithm to choose the initial profile picture, utilizing RtlRandomEx with GetTickCount() as the seed. This approach is efficient and avoids complications if directory contents change during execution.

List of references on Sony websites to players "owning" their digital games

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Four California PlayStation buyers sued Sony Interactive Entertainment, alleging they received a limited license rather than ownership for hundreds of dollars spent on digital goods. The complaint claims the store's checkout language violates California's digital-goods transparency law.

iPhone Duo

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The iPhone Duo offers a spacious display, multitasking capabilities, and compact design. It features essential controls on the side for easy access and comes with various accessories like a 100% fiber-based box for packaging.

DeepSeek v4.1 Flash

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🚀 Introducing DeepSeek-V4.1-Flash: smarter, faster, more efficient. 🔹 Introducing the smallest model in our new architecture family, with native visual understanding. 🔹 Designed for greater capability, faster inference, higher throughput, and scaling to larger models. 1/6

Tell HN: OpenAI keeps re-enabling the 'allow training' setting

I've reset this more than once and the last time I made a careful note of when I did it and to my surprise I found it re-enabled when I checked just now. Make sure you check this thing to see if it hasn't been re-enabled if you believe it to be off right now.

Another researcher says OpenAI trained on conversations, then claimed breakthrou

another researcher accuses OpenAI of training on conversations and then claiming a breakthrough

Show HN: What if the speed of light was 5 km/h?

User controls a park where the speed of light is 5 km/h, demonstrating relativistic effects like length contraction and time dilation. The user can accelerate, stop, and observe these effects by moving around the park with W A S D keys and mouse.

Stockfish 19

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Stockfish 19 has been released with improved strength and features, offering a stronger play and more accurate analysis. The new release brings an Elo gain of up to 44 points and is available for download at stockfishchess.org/download.

Liesegang Rings

Shopify acquires Tailwind

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The Tailwind CSS framework is being joined by Shopify to provide a stable long-term home for its development and maintenance. This partnership will enable the creation of complex applications solving real-world problems, while maintaining open-source licensing and community support.

What do Visa and Mastercard do? An intro to card networks

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Visa and Mastercard are card networks that facilitate transactions between cardholders, issuers, and merchants. They don't issue cards or manage point-of-sale systems, but instead connect these parties to enable secure transactions.

Object storage is all you need

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Ampbase uses Tigris, a distributed key-value store, as its object storage layer and implements database behaviors such as unique constraints, transactions, indices, and history tables on top of it. The system achieves strong read-after-write consistency through Tigris' global object storage.

Thanks to Siri Recaps, your Apple Watch is always listening

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Apple has introduced Siri Recaps, a feature that uses the Apple Watch's sensors to provide a summary of your day, and Live Rewind, which can produce a transcript of the last 15 seconds of audio on your watch face. These features have raised concerns about user privacy due to their always-listening nature.

Larger Pacific Striped Octopus

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The Pacific striped octopus, also known as the Harlequin octopus, is a social species that forms groups of up to 40 individuals and exhibits unique mating behaviors. It has been found in tropical waters of the Eastern Pacific and can reproduce multiple times throughout its life.

To write non-fiction, draw the trunk, then the rest of the tree

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A professor criticized a student's group essay, attributing success to a friend and suggesting individual essays next semester. The student felt undervalued despite writing most of the essay alone.

Who People Talk to When They're Struggling

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The article discusses the US loneliness epidemic and how people turn to their spouses, close friends, or mental health therapists for support. Most Americans feel comfortable talking about their mental health with family members but struggle to open up to co-workers or neighbors.

Growing proof that autonomous cars save lives

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Researchers found that self-driving cars crash significantly less often than human drivers, with evidence showing a 27% reduction in pedestrian crashes and up to 39% fewer property-damage claims. Studies also show that Waymo's robotaxis have given millions of paid rides with a 92% reduction in fatal or serious-injury crashes compared to human drivers.

No Man's Sky Cosmos

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New features have been added to No Man's Sky, including a star system map, deep-space points of interest, and the ability to mine resources from asteroids. The game also includes new player titles and rewards for accomplishments at these points of interest.

Samsung Debuts zHBM Prototype, Stacking Memory Directly on AI Accelerators

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Samsung Electronics unveiled next-generation 3D memory technologies, including zHBM and zNAND-O, to strengthen its position in the rapidly growing AI market. The company showcased mockups of these technologies at the FMS 2026 conference in California.

GPT-6 Astra, looped transformers, and hidden reasoning

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The author discusses OpenAI's GPT-6 Astra model, highlighting its exceptional performance in 3D rendering and animation tasks. The model uses a looped transformer architecture, which allows it to reuse transformer blocks multiple times without adding more weights. This technique improves modeling performance at a fixed compute budget but may not significantly impact the reasoning trace or ...

Show HN: Art – draw one stroke, let symmetry complete it

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Recolour keeps the geometry and re-runs the palette. Inks below are for drawing — metallics and gradient inks shift colour as the stroke travels outward.

AirPods 5

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Apple has announced AirPods 5 with improved Active Noise Cancellation and sound quality, starting at $129. The new model features a multiport acoustic architecture and Adaptive EQ for immersive sound.

iPhone 18 Pro and iPhone 18 Pro Max

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Apple has announced iPhone 18 Pro and iPhone 18 Pro Max with improved cameras, battery life, and performance. The new models feature a 48MP Fusion Main camera with variable aperture and AI-powered improvements to cellular quality and reliability.

Automattic's board forces CEO Matt Mullenweg into leave of absence

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Matt Mullenweg, founder of Automattic, has been placed on paid leave by the company's board after a vote. The move comes amid ongoing lawsuits and controversy surrounding the company's leadership and operations.

Aardman (Wallace and Gromit) Is Selling Its Original Movie Puppets

Desert Ant Labs: local, fast models that run on device

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Desert Ant Labs launches a European frontier AI lab building on-device intelligence models for audio, vision, and text. The first 18 models are live today, offering fast and cost-free inference for various tasks.

Show HN: Compute polynomials twice as fast

Horner's method can evaluate a polynomial in n multiplications, but preprocessing coefficients reduces this to ⌊n/2⌋+1 for monic polynomials and ⌊n/2⌋+2 for general ones.

Qwen 3.8 follows GPT-5.5 Pro reasoning prefills