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An interactive guide to sensor fusion with quaternions

news.ycombinator.com Josh Cole 2025-11-20 21:17:07

*01.00* About Welcome to quaternion.cafe! A portal into the world of sensor fusion with quaternions. This vim-inspired tutorial has interactive code editors and 3D visualizations scattered throughout. The content is centered around fusing and integrating a gyroscope with an accelerometer, and explains (with code) how to accomplish this task. All the visualization use real datasets from an actual IMU to illustrate some of the concepts. I spent the last 5 years making this IMU-based telescope ac

Topics: const let q_body quaternion row

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2,178 Occult Books Now Digitized and Put Online

news.ycombinator.com Unknown 2025-11-20 23:03:36

In 2018 we brought you some exciting news. Thanks to a generous donation from Da Vinci Code author Dan Brown, Amsterdam’s Ritman Library—a sizable collection of pre-1900 books on alchemy, astrology, magic, and other occult subjects—has been digitizing thousands of its rare texts under a digital education project cheekily called “Hermetically Open.” We are now pleased to report that the first 2,178 books from the Ritman project have come available in their online rea

Topics: books cal er ing tion

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Wild Video Shows Humanoid Robot Effortlessly Folding Laundry

futurism.com Unknown 2025-11-21 03:49:01

Earlier this month, AI robotics firm Figure released a video showing Figure 02, the company's autonomous humanoid robot powered by a visual language system called Helix, loading clothes into a laundry machine to be washed. Now, the company says that the robot has a new skill: folding laundry. Figure announced the capability in a blog post yesterday, celebrating the news as a landmark event for the company and autonomous laundry frontiers writ large. The robot's folding prowess, the company de

Topics: company figure humanoid laundry robot

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Deals 24GB M4 MacBook Pro $300 off, M4 Max Mac Studio $300 off, MacBook Air, iPad Air, more

9to5mac.com Justin Kahn 2025-11-21 04:46:10

Today’s 9to5Toys Lunch Break deals is headlined by our giant lineup of weekend Apple deals. We are once again heading into the weekend with all-time low pricing on the M3 iPad Air lineup alongside deals on M4 MacBook Air, iPad mini 7, AirPods 4, and a whole lot more all rounded up for you right here. On top of that we have also spotted a rare discount on the most affordable 24GB M4 MacBook Pro you can buy at $300 off alongside even deeper deals on M4 Max Mac Studio models at $300 off. Everything

Topics: amazon m4 macbook price right

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Compiler Bug Causes Compiler Bug: How a 12-Year-Old G++ Bug Took Down Solidity

news.ycombinator.com Unknown 2025-11-17 02:04:21

Compilers aren't supposed to crash — especially not when compiling perfectly valid code like this: // SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.25; contract A { function a () public pure returns ( uint256 ) { return 1 ** 2 ; } } Yet running Solidity's compiler (solc) on this file on a standard Ubuntu 22.04 system (G++ 11.4, Boost 1.74) causes an immediate segmentation fault. At first, this seemed absurd. The code just returns 1 to the power of 2 — no memory tricks, unsafe casti

Topics: boost function member operator rational

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Premier League Soccer: Stream Liverpool vs. Bournemouth Live From Anywhere

cnet.com See Full Bio 2025-11-21 04:00:04

Arne Slot's new-look Liverpool team begins its title defense at home on Friday as it takes on Andoni Iraola's Bournemouth in the opening game of the new English Premier League season. Below, we'll outline the best live TV streaming services to use to watch Premier League games as they happen, wherever you are in the world, and how to use a VPN if it's not available where you are. Despite last season's triumph that saw them finish 10 points ahead of second-place Arsenal, the Reds have undertake

Topics: bournemouth league premier streaming vpn

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MacBook Air deal: Pick up the M4-powered laptop while it's down to a record-low price

engadget.com Unknown 2025-11-21 14:31:27

Whether you need a new MacBook for the upcoming semester or you've just been itching to upgrade from an older machine, now's a good time to buy. Amazon has a sale on the latest M4 MacBook Air that knocks up to 20 percent off many configurations. The base model is where you'll get the biggest discount. The 16GB RAM/256GB SSD laptop is down to $799 from $999, which is the lowest price we've seen. You can upgrade to 512GB SSD for $999, down from $1,199, another all-time low price, or 24GB of RAM a

Topics: 199 inch macbook price ssd

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How much RAM do you really need in 2025?

zdnet.com Cesar Cadenas 2025-11-21 14:23:00

Kyle Kucharski/ZDNET Get more in-depth ZDNET tech coverage: Add us as a preferred Google source on Chrome and Chromium browsers. I used to struggle when shopping for a new computer. Over time, I learned to narrow things down to what I call the "performance trifecta" -- three main components you should be mindful of when buying a laptop or desktop: processor, storage drive, and RAM. The first two are pretty easy to figure out. A good processor ensures that a computer performs well, and a lots o

Topics: computer laptop macbook memory ram

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Is a refurbished MacBook viable in 2025? I did the math, and here's my expert advice

zdnet.com Kyle Kucharski 2025-11-21 14:39:00

Kyle Kucharski/ZDNET I remember when people used to scoff at refurbished tech. Buying a used phone or computer was like rolling the dice: you never knew exactly what you were getting. Well, the times certainly have changed. And, in this economy, the prices on refurbished tech are looking more and more tempting. Consumers are challenging this idea that we're all supposed to buy brand new phones and laptops every few years, and in the process, the market for refurbished tech has blown up. Also:

Topics: macbook market new pro refurbished

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Another giant collection of Apple gear on sale this weekend: MacBooks, iPad, AirPods, more

9to5mac.com Justin Kahn 2025-11-21 18:04:11

Another sizable lineup of week’s end Apple deals are at the ready folks. Last week we featured a series of massive Apple sales at retailers like Amazon, Best Buy, and B&H, and since that time, just about all of the best deals have carried through to this week/weekend. We have also added a number of new price drops on M4 MacBook Pro and M4 MacBook Air configurations you don’t often see discounted, alongside offers on Apple Watch Series 10 at up to $149 off just after Apple introduced a brand new

Topics: airpods apple m4 macbook pro

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OnePlus will limit bootloader unlocking, but it’s not all bad news

androidauthority.com Unknown 2025-11-22 02:00:10

Joe Maring / Android Authority TL;DR OnePlus is placing new restrictions on bootloader unlocking. It requires filling out an application form and limits the number of requests to one every 30 days. Thankfully, these limitations only apply to Chinese users (so far) and only on devices running at least ColorOS 16 based on Android 16. Android has evolved significantly in the last decade, and one noticeable shift has been in the decline of custom development in Android. Custom ROMs or mods are f

Topics: android bootloader devices oneplus users

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Citybound: City building game, microscopic models to vividly simulate organism

news.ycombinator.com Unknown 2025-11-21 14:51:16

A city building game that uses microscopic models to vividly simulate the organism of a city arising from the interactions of millions of individuals. People on the move, businesses in trade, neighbourhoods changing. Each inhabitant struggling, adapting, making life choices. The city evolves, the city grows. The city is us. See and inspect all aspects of city life, across many scales of time and space. Shape your city by sketching detailed project plans for infrastructure and zones. Implement

Topics: actor city citybound simulation time

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Progress towards universal Copy/Paste shortcuts on Linux

news.ycombinator.com Mark Stosberg 2025-11-18 22:00:04

On Linux, Control-C and Control-V don't work for copying and pasting in terminals. The Control modifier is used for its original purpose of inserting control codes. Instead, terminal apps require an extra Shift modifier, like Control+Shift+C. But what if there were hidden shortcut combos for copy and paste on Linux that work across most apps without adding any additional software or configuration? By the end of 2025, this will be the case, and many apps already support them. Here's the scoop!

Topics: copy keyboard keys paste support

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Booking.com phishing campaign uses sneaky 'ん' character to trick you

bleepingcomputer.com Unknown 2025-11-22 10:23:45

Threat actors are leveraging a Unicode character to make phishing links appear like legitimate Booking.com links in a new campaign distributing malware. The attack makes use of the Japanese hiragana character, ん, which can, on some systems, appear as a forward slash and make a phishing URL appear realistic to a person at a casual glance. BleepingComputer has further come across an Intuit phishing campaign using a lookalike domain using the letter L instead of 'i' in Intuit. Booking.com phishi

Topics: booking com email intuit phishing

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OneSignal (YC S11) Is Hiring Engineers

news.ycombinator.com Unknown 2025-11-22 18:01:04

We value workplace flexibility At OneSignal, we understand that flexibility is key when it comes to having productive and happy teammates. We know that different roles/teams/people have different needs – some benefit more from being fully remote while others benefit more from having a hybrid setup where they have in office collaboration days 2-3 days a week. So we support both! Our headquarters are based in San Mateo, CA and we also offer shared workspace options for our teams to work together

Topics: benefit ca collaboration days having

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Google Reportedly Working on a Mysterious 'Magic View' for NotebookLM

cnet.com See Full Bio 2025-11-22 16:21:00

Google is continually expanding and strengthening the features for NotebookLM, its free AI-powered research assistant. An upcoming feature, code-named Magic View, should eventually land in the Studio panel alongside popular features like Audio and Video Overviews. At the moment, there's no clear indication as to what Magic View is (or will do) when it formally arrives in NotebookLM, but it's clear that Google keeps improving what I'd consider its best AI tool available today. The leak comes fr

Topics: feature google magic notebooklm view

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Netflix's KPop Demon Hunters is headed to theaters for two days

engadget.com Unknown 2025-11-21 09:45:52

You'll soon be able to watch KPop Demon Hunters on the big screen. The Netflix animated film has become a global hit since it launched on the platform and has reportedly become the second most-watched movie on the service's history after Red Notice. Now, Netflix is holding a limited theatrical event, wherein fans can watch a sing-along version of the film. Aside from the movie itself being a hit, its songs have gained massive popularity, with the track Golden recently taking the number one spot

Topics: boys demon demons film hunters

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Bask in the Golden Age Hero Stylings of ‘The Boys’ Prequel ‘Vought Rising’

gizmodo.com Sabina Graves 2025-11-23 04:00:26

As The Boys prepares to say goodbye in 2026, the Amazon Prime franchise is gearing up for its prequel spin-off. In Vought Rising, some familiar faces, including Soldier Boy (Jenson Ackles) and Stormfront (Aya Cash) are set to feature, alongside some new heroes. The upcoming Amazon series will explore the origin story that establishes the foundation for the nefarious presence of the corporate entity controlling the superhero world throughout the history of the Boys universe. Today, the streamer

Topics: ackles boy boys look set

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Show HN: Modelence – Supabase for MongoDB

news.ycombinator.com Unknown 2025-11-23 06:13:29

Getting Started Modelence is an all-in-one TypeScript framework for startups shipping production apps, with the mission to eliminate all boilerplate for standard features that modern web applications need, like authentication, database setup, cron jobs, AI observability, email and more.

Topics: ai applications apps authentication boilerplate

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1976 Soviet edition of 'The Hobbit' (2015)

news.ycombinator.com Unknown 2025-11-18 18:54:35

The Soviet Hobbit Bilbo and Gollum behind the Iron Curtain Alex Q. Arbuckle 1976 Credit: Via English Russia First published in 1937, J.R.R. Tolkien’s classic Lord of the Rings prequel The Hobbit, or There and Back Again, has been translated into more than 40 languages. In addition to different translations, dozens of uniquely illustrated versions of the children’s story have been released over the years. This 1976 Soviet edition features illustrations by M. Belomlinskij, depicting Bilbo, Ga

Topics: bilbo credit english gollum russia

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I wasn’t using NotebookLM for YouTube research, but this extension changed all that

androidauthority.com Unknown 2025-11-23 18:30:29

Andy Walker / Android Authority NotebookLM is by far the best AI project Google has piloted, and you can’t convince me otherwise. Sure, there are flashier examples, but none match the practical, everyday usefulness of this research and notebook app. Whether it’s for analyzing insurance or legal documents or helping me navigate my car’s user and care manual, this is one AI product I use almost every day. While importing various documents into the service is straightforward, uploading online medi

Topics: extension notebook notebooklm video youtube

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‘Witchboard’ Summons a Fun but Uneven Remake of a Cult Classic

gizmodo.com Cheryl Eddy 2025-11-23 18:00:48

Released in 1986, the original Witchboard‘s cultural impact lingers mostly because it stars Tawny Kitaen—known more for being a music-video vixen than an actor. But the stunt casting works: her character’s Ouija board curiosity turns tragic when an evil spirit takes a shine to her, possibly lured in by her perfectly teased hair. The movie delivers more cheese than frights, but you can easily see why it became a cult classic. Less clear is why Witchboard needed a remake, especially one that only

Topics: board brooke emily way witchboard

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Apple’s first Mac with 5G cellular might be coming sooner than we thought

9to5mac.com Ryan Christoffel 2025-11-23 23:53:15

Rumors have long indicated Apple intends to bring cellular connectivity to the Mac, but a new report indicates the first cellular Mac might be right around the corner: the M5 MacBook Pro. M5 MacBook Pro with 5G cellular reportedly being tested Earlier today, Filipe Esposito reported at Macworld that he’d uncovered code evidence of an M4 Ultra chip in a forthcoming Mac Pro model. Now, Esposito has a follow-up report on another Mac model: the M5 MacBook Pro. He writes: Internal Apple code see

Topics: apple m5 mac macbook pro

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Marvel’s Best Movie of the Year is Coming to Streaming Soon

gizmodo.com Isaiah Colbert 2025-11-23 23:00:38

Whether you call them Thunderbolts or New Avengers, you can also call it home for dinner because one of the best, if not the best, Marvel movies of the year is headed to Disney+ later this month. Earlier today, Marvel announced Thunderbolts will make its way to the streaming platform on August 27. As noted in Marvel’s press release hyping its streaming debut, its pilgrimage to the premiere destination for all things MCU comes after the film built up a surprising amount of momentum in its theatr

Topics: best film marvel release thunderbolts

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Brilliant illustrations bring this 1976 Soviet edition of 'The Hobbit' to life (2015)

news.ycombinator.com Unknown 2025-11-19 18:54:35

The Soviet Hobbit Bilbo and Gollum behind the Iron Curtain Alex Q. Arbuckle 1976 Credit: Via English Russia First published in 1937, J.R.R. Tolkien’s classic Lord of the Rings prequel The Hobbit, or There and Back Again, has been translated into more than 40 languages. In addition to different translations, dozens of uniquely illustrated versions of the children’s story have been released over the years. This 1976 Soviet edition features illustrations by M. Belomlinskij, depicting Bilbo, Ga

Topics: bilbo credit english gollum russia

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New protein therapy shows promise as antidote for carbon monoxide poisoning

news.ycombinator.com Unknown 2025-11-24 06:56:20

University of Maryland School of Medicine (UMSOM) researchers, along with their colleagues, engineered a new molecule that appears promising as an effective antidote for carbon monoxide poisoning with fewer side effects than other molecules currently being tested, according to a new study published in the journal PNAS. Carbon monoxide poisoning accounts for 50,000 emergency room visits in the U.S. each year and causes about 1,500 deaths. These deaths may occur when carbon monoxide released from

Topics: blood carbon monoxide oxygen school

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The Best Smart Scales for 2025 and How to Get the Most Accurate Reading

cnet.com See Full Bio 2025-11-24 08:00:00

Weigh yourself at the same time: To get a consistent reading when using any scale, it's important to weigh yourself first thing in the morning before you've drunk or eaten anything. "You should weigh yourself without clothes, or minimal clothing, and if you do so, try to wear the same clothing each time you weigh yourself," said Stella Lucia Volpe, professor and head of the Department of Human Nutrition, Foods and Exercise at Virginia Tech. Volpe recommends weighing yourself no more than once a

Topics: body scale smart weigh weight

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I’m Watching Every Conjuring Movie Before 'The Conjuring: Last Rites.' Here’s Where to Stream Them All

cnet.com See Full Bio 2025-11-24 08:00:00

When The Conjuring debuted in 2013, directed by James Wan, the movie felt like a throwback to atmospheric 1970s horror flicks such as The Changeling or The Manitou. From its simple opening title card -- yellow text on a black background -- to its relatively little gore and slow build of suspense, The Conjuring was a breath of fresh air. It arrived at a time when the horror genre was rampant with gruesome movies like Saw (which was also directed by Wan) and Hostel. The Conjuring kick-started not

Topics: conjuring hbo movies streaming vpn

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The Narwal Flow is the closest I’ve seen a robot vacuum get to being perfect

androidauthority.com Unknown 2025-11-24 09:30:08

Narwal Flow If you're considering a robot vacuum purchase purely based on its ability to leave floors of all types as clean as possible, the Narwal Flow is the best bot you can get. AI-powered navigation, EdgeReach Technology, and anti-tangle brushes clean carpets and hard floors all the way to the edges and into the corners with zero fuss. The multi-function base station, with self-cleaning and drying functions, also makes it a breeze to use. Today, I looked at my floor and noticed it looked e

Topics: bot clean flow narwal navigation

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Cowboy e-bikes rescued from collapse thanks to rescue deal

engadget.com Unknown 2025-11-24 14:30:12

E-bike company Cowboy has secured short-term financing that would allow its operations to go back to normal after a period it describes as the "most challenging in [its] history." The company has revealed that it has signed a term sheet with a new partner, Rebirth, which it believes would pave the way for long-term stability. As The Verge notes, Rebirth is the parent of ReCycles, the prominent French manufacturer that took over bike assembly for Cowboy back in February. For quite some time, the

Topics: bike bikes company cowboy term

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Latest Tech News

An interactive guide to sensor fusion with quaternions

2,178 Occult Books Now Digitized and Put Online

Wild Video Shows Humanoid Robot Effortlessly Folding Laundry

Deals 24GB M4 MacBook Pro $300 off, M4 Max Mac Studio $300 off, MacBook Air, iPad Air, more

Compiler Bug Causes Compiler Bug: How a 12-Year-Old G++ Bug Took Down Solidity

Premier League Soccer: Stream Liverpool vs. Bournemouth Live From Anywhere

MacBook Air deal: Pick up the M4-powered laptop while it's down to a record-low price

How much RAM do you really need in 2025?

Is a refurbished MacBook viable in 2025? I did the math, and here's my expert advice

Another giant collection of Apple gear on sale this weekend: MacBooks, iPad, AirPods, more

OnePlus will limit bootloader unlocking, but it’s not all bad news

Citybound: City building game, microscopic models to vividly simulate organism

Progress towards universal Copy/Paste shortcuts on Linux

Booking.com phishing campaign uses sneaky 'ん' character to trick you

OneSignal (YC S11) Is Hiring Engineers

Google Reportedly Working on a Mysterious 'Magic View' for NotebookLM

Netflix's KPop Demon Hunters is headed to theaters for two days

Bask in the Golden Age Hero Stylings of ‘The Boys’ Prequel ‘Vought Rising’

Show HN: Modelence – Supabase for MongoDB

1976 Soviet edition of 'The Hobbit' (2015)

I wasn’t using NotebookLM for YouTube research, but this extension changed all that

‘Witchboard’ Summons a Fun but Uneven Remake of a Cult Classic

Apple’s first Mac with 5G cellular might be coming sooner than we thought

Marvel’s Best Movie of the Year is Coming to Streaming Soon

Brilliant illustrations bring this 1976 Soviet edition of 'The Hobbit' to life (2015)

New protein therapy shows promise as antidote for carbon monoxide poisoning

The Best Smart Scales for 2025 and How to Get the Most Accurate Reading

I’m Watching Every Conjuring Movie Before 'The Conjuring: Last Rites.' Here’s Where to Stream Them All

The Narwal Flow is the closest I’ve seen a robot vacuum get to being perfect

Cowboy e-bikes rescued from collapse thanks to rescue deal

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