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What Is the Magnetic Constant, and Why Does It Matter?

wired.com Rhett Allain 2025-11-03 23:30:00

This means these three values can’t be independent; if you know two of them, you can derive the third. How do physicists deal with this? We define the speed of light as exactly 299,792,458 meters per second. (How do we know it’s exact? Because we define a meter as the distance light travels in 1/299,792,458 of a second.) Then we measure the magnetic constant (μ 0 ) and use that value along with the speed of light to calculate the electric constant (ε 0 ). Maybe that seems like cheating, but to

Topics: constant current electric field magnetic

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Prediction-Encoded Pixels image format

news.ycombinator.com Unknown 2025-11-05 11:05:38

Prediction-Encoded Pixels This format is specifically designed to be for low-color pixel art (<=16 colors works best, up to 256 colors is supported). It uses "Prediction by Partial Matching, Order-2" compression, which is able to compress packed-palette-indices smaller than GIF, PNG, and QOI, while sacrificing a bit of time. It's 2-10x slower than GIF/PNG/QOI (depending on the image), but often compresses the image 20-50% smaller than GIF/PNG (and multiple-times smaller than QOI). If you care

Topics: compression image in_pep pep struct

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SpaceX’s latest Dragon mission will breathe more fire at the space station

arstechnica.com Unknown 2025-11-05 15:21:20

SpaceX completed its 33rd cargo delivery to the International Space Station early Monday, when a Dragon supply ship glided to an automated docking with more than 5,000 pounds of scientific experiments and provisions for the lab's seven-person crew. The resupply flight is part of the normal rotation of cargo and crew missions that keep the space station operating. The Dragon spacecraft's cargo haul comprised packages of fresh food, including some 1,500 tortillas, and equipment for numerous resea

Topics: altitude cargo dragon space station

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Next set of VC judges locked in for Startup Battlefield 200 at TechCrunch Disrupt 2025

techcrunch.com Techcrunch Events 2025-11-05 15:00:00

The Startup Battlefield 2025 judging panel is getting even stronger. Our first wave of VCs brought serious firepower, and now we’re adding more top investors who will grill founders, unpack the big questions, and help crown this year’s $100,000 champion at TechCrunch Disrupt, October 27–29 in San Francisco’s Moscone West. Like the legendary investors who’ve judged in years past, this next group brings the insight, experience, and instincts that can change a founder’s trajectory in just one Q&A.

Topics: disrupt partner stage startup ventures

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A four-pack of Apple AirTags drops to $70 for Labor Day

engadget.com Unknown 2025-11-05 20:07:40

If you're thinking about getting some of Apple's AirTags, now's the time to act — Amazon currently has a four-pack on sale for $70. That's one of the lowest prices we've seen outside the big sales on Black Friday and Prime Day. For Apple users, AirTags offer some large advantages over rival trackers. The ultra-wideband functionality offers precise tracking with iPhones less than five years old, so you can narrow your search between a couch and love seat in the same room. Over larger distances,

Topics: act airtag apple trackers users

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Google will soon make it easier to find out what’s wrong with your Pixel (APK teardown)

androidauthority.com Unknown 2025-11-06 09:07:26

Rita El Khoury / Android Authority TL;DR Google is testing new diagnostics options for Pixel devices. This new option combines discrete options into a single dashboard to test if there’s anything wrong with your phone. It also introduces a new AI-powered search option to inspect likely problems with your Pixel device. The on-device diagnostics options on Google’s Pixel phones are in for a significant overhaul. We have spotted Google testing a new menu option that combines various diagnostic

Topics: device diagnostics menu options pixel

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SmallJS: Smalltalk-80 that compiles to JavaScript

news.ycombinator.com Unknown 2025-11-05 04:29:02

SmallJS is a free and open source implementation of the elegant and powerful Smalltalk-80 (ST) language. It compiles to JavaScript (JS) that runs in modern browsers or in Node.js. SmallJS is file based, not image based, so you can develop in your favorite IDE. The default setup is for Visual Studio Code, with ST syntax coloring and step debugging! You code separately from the SmallJS base libraries (image) and only the parts you use are imported automatically when running your app. SmallJS is

Topics: browsers image js smalljs st

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The Mysterious Shortwave Radio Station Stoking US-Russia Nuclear Fears

wired.com Justin Ling 2025-11-06 10:00:00

Shortly after US president Donald Trump hung up a call with Russia’s Vladimir Putin this spring, an obscure shortwave radio channel, broadcasting from a military base somewhere in Russia, sprang to life. Through a fog of static, at 4625 kHz on the shortwave dial, a man’s voice spoke in monotone: “Nikolai, Zhenya, Tatiana, Ivan.” He repeats the message—spelled out in the Russian phonetic alphabet—followed by a series of numbers and letters. The whole message reads: “NZhTI 01263 BOLTANKA 4430 952

Topics: 76 message radio shortwave station

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Pro by Déesse Pro Review: Mostly a Gimmick

wired.com Boutayna Chokrane 2025-11-06 11:30:00

Wearing the Pro by Déesse Pro is like cosplaying the Phantom of the Opera—if the Phantom had better LED coverage and $1,700 to spare. With 770 lights, six treatment modes, and four wavelengths, it looks like the most advanced LED mask on the market. But after six weeks of consistent use, I wouldn't recommend it. It's uncomfortable, inconvenient, and delivers results that are far less impressive than its theatrics. Missing the Basics Courtesy of Déesse Pro The Pro is a hard-shell LED mask wit

Topics: aging anti mode skin treatment

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Show HN: Bicyclopedia

news.ycombinator.com Unknown 2025-11-06 00:15:26

Welcome! This is an interactive exploration of the parts of a bicycle. If you're reading this message, the images may still be loading. If you are using a screen reader or have Javascript disabled, unfortunately you won't be able to see the images or animations of the parts, but you can still read the descriptions and source code here and read more about this project here. Thank you for visiting!

Topics: able code images parts read

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Premier League Soccer: Stream Everton vs. Brighton Live From Anywhere

cnet.com See Full Bio 2025-11-05 23:00:10

Everton begins life at its new home Sunday as it faces Brighton at its new 52,769-seater Hill Dickinson Stadium on the banks of the River Mersey. Below, we'll outline the best live TV streaming services for watching English 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. Toffees boss David Moyes will be hoping his team can give a better account of themselves in today's grand unveiling than their season-opener against

Topics: brighton everton league streaming vpn

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Premier League Soccer: Stream Crystal Palace vs. Nottingham Forest Live From Anywhere

cnet.com See Full Bio 2025-11-05 23:00:12

Two teams that have made strong starts to the new season despite behind-the-scenes turbulence face off in south London on Sunday, as Crystal Palace hosts Nottingham Forest. Below, we'll outline the best live TV streaming services for watching English 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. Palace followed up its Community Shield triumph over Liverpool with a creditable draw away against London rivals Chelsea

Topics: forest league premier streaming vpn

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Premier League Soccer: Stream Fulham vs. Man United Live From Anywhere

cnet.com See Full Bio 2025-11-06 02:30:04

New signing Benjamin Šeško could make his first start in the English Premier League for Manchester United on Sunday as Ruben Amorim's men travel to Craven Cottage to face Fulham. Below, we'll outline the best live TV streaming services for watching 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. United got the new campaign off to a losing start at home to Arsenal last weekend, but Amorim will have been encouraged by

Topics: league premier streaming united vpn

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The Hidden Ingredients Behind AI’s Creativity

wired.com Webb Wright 2025-11-06 00:00:00

The original version of this story appeared in Quanta Magazine. We were once promised self-driving cars and robot maids. Instead, we’ve seen the rise of artificial intelligence systems that can beat us in chess, analyze huge reams of text, and compose sonnets. This has been one of the great surprises of the modern era: physical tasks that are easy for humans turn out to be very difficult for robots, while algorithms are increasingly able to mimic our intellect. Another surprise that has long p

Topics: creativity diffusion images models new

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Best 360 Cameras (2025), Tested and Reviewed

wired.com Scott Gilbertson 2025-11-06 04:00:00

Top 4 360 Cameras Compared Insta360 X5 Insta360 X4 DJI Osmo 360 Ricoh Theta X Price (sale) $550 $500 ($350) $550 $597 Max Video Specs 8K 30 fps 360, 4K 60 fps in single lens mode 8K 30 fps 360, 4K 60 fps in single lens mode 8K 50 fps / 4K 120 fps in single-lens mode 5.7K 30 fps 360 / 4K 30 fps in single lens mode Single Lens Mode Yes Yes Yes Yes Photo Resolution 72 MP (11,904 x 5,952), 18 MP (5,888 x 2,944). RAW (DNG) supported 72 MP (11,904 x 5,952), 18 MP (5,888 x 2,944). RAW (DNG) supported

Topics: 360 camera cameras footage video

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How to Fix Your Context

news.ycombinator.com Drew Breunig 2025-11-06 02:09:53

Mitigating & Avoiding Context Failures Following up on our earlier post, “How Long Contexts Fail”, let’s run through the ways we can mitigate or avoid these failures entirely. But before we do, let’s briefly recap some of the ways long contexts can fail: Context Poisoning: When a hallucination or other error makes it into the context, where it is repeatedly referenced. When a hallucination or other error makes it into the context, where it is repeatedly referenced. Context Distraction: When

Topics: agent context information tool tools

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How to build a coding agent

news.ycombinator.com Geoffrey Huntley 2025-11-05 21:21:14

😎 The following was developed last month and has already been delivered at two conferences. If you would like for me to run a workshop similar to this at your employer, please get in contact Hey everyone, I'm here today to teach you how to build a coding agent. By this stage of the conference, you may be tired of hearing the word "agent". You hear the word frequently. However, it appears that everyone is using this term loosely without a clear understanding of what it means or how these coding

Topics: agent claude file riddle tool

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What Is the Magnetic Constant and Why Does It Matter?

wired.com Rhett Allain 2025-11-06 05:30:00

This means these three values can’t be independent; if you know two of them, you can derive the third. How do physicists deal with this? We define the speed of light as exactly 299,792,458 meters per second. (How do we know it’s exact? Because we define a meter as the distance light travels in 1/299,792,458 of a second.) Then we measure the magnetic constant (μ 0 ) and use that value along with the speed of light to calculate the electric constant (ε 0 ). Maybe that seems like cheating, but to

Topics: constant current electric field magnetic

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Ninja Gaiden: Ragebound is a perfect reimagining of the classic series

theverge.com Jay Peters 2025-11-05 04:00:00

is a news editor covering technology, gaming, and more. He joined The Verge in 2019 after nearly two years at Techmeme. Ninja Gaiden is having a renaissance. The last mainline entry was originally released more than a decade ago, but by the end of 2025, there will be three new Ninja Gaiden titles. Two are 3D: Ninja Gaiden 2 Black, a modern-day remaster of Ninja Gaiden II released earlier this year, and Ninja Gaiden 4, co-developed by PlatinumGames and set to release in October. But there’s a ne

Topics: enemies gaiden game ninja ragebound

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Show HN: How to Build a Coding Agent (free workshop)

news.ycombinator.com Geoffrey Huntley 2025-11-06 03:21:14

😎 The following was developed last month and has already been delivered at two conferences. If you would like for me to run a workshop similar to this at your employer, please get in contact Hey everyone, I'm here today to teach you how to build a coding agent. By this stage of the conference, you may be tired of hearing the word "agent". You hear the word frequently. However, it appears that everyone is using this term loosely without a clear understanding of what it means or how these coding

Topics: agent claude file riddle tool

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Apple AirTag 2 Rumors: New Features and Possible Release Date Leaked

cnet.com See Full Bio 2025-11-05 06:00:07

The original AirTag was launched nearly four years ago, which is practically a lifetime for an Apple product. The little tracker has proven to be a sleeper hit with plenty of people the world over using it to find their keys, wallet, luggage and various personal belongings. But four years is a long time, and it's time this smart tracker sees an update. That sort of delay is unusual for Apple, which tends to refresh most of its product lines every couple of years. Now, as summer travel season wr

Topics: airtag apple chip new tracking

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English Premier League Soccer: Livestream Brentford vs. Aston Villa From Anywhere

cnet.com See Full Bio 2025-11-05 08:00:14

Things don't get much easier for new Brentford boss Keith Andrews as the Bees take on an Aston Villa team looking to underline their top-five credentials. Below, we'll outline the best live TV streaming services for watching English 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. Many pundits have tipped the Bees to be among the relegation candidates this season following a summer that has seen them lose their manage

Topics: brentford league premier streaming vpn

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How to Fight Food Noise if It’s Taking Over Your Life, Both IRL and Online

cnet.com See Full Bio 2025-11-05 09:00:00

If you’ve ever found your mind consumed with constant thoughts about food, chances are you have experienced food noise. It's usually brought on by conflicting messages about nutrition, either through everyday conversation or content online. It could be feeling guilty because you ate a cupcake when you promised yourself you weren’t going to touch sweets for a while, or maybe you’re trying to meet your protein quota and are obsessively keeping track of it. These thoughts are common, and in some ca

Topics: eating food help noise semaglutide

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Premier League Soccer: Stream Arsenal vs. Leeds Live From Anywhere

cnet.com See Full Bio 2025-11-05 10:30:03

Arsenal plays its first home fixture of the new season on Saturday as Leeds heads south to the Emirates, buoyed by a positive start to life back in the English Premier League. Below, we'll outline the best live TV streaming services for watching 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. The Gunners kicked off the new campaign with a narrow 1-0 win away at Man United. They will have been further boosted by havin

Topics: league leeds month streaming vpn

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Exploring EXIF (2023)

news.ycombinator.com Unknown 2025-11-03 14:25:58

← Harley Turan • August 2023 August 2023 Exploring EXIF According to iOS’ Photos application, I’ve taken 73,281 photos over the past 14 years of owning an iPhone. Each one of those images doesn't just contain the photo you see as you scroll through the Photos app — it contains a wealth of information stored encoded directly into the image file itself. It details useful metadata such as where the photo was taken (so that you can view your photos on a map at a later date), the time and date the

Topics: data image photo photos stored

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Line scan camera image processing for train photography

news.ycombinator.com Daniel Lawrence Lu 2025-11-05 20:09:21

I use my line scan camera to take cool pictures of trains and other stuff. But there’s a lot that goes into properly processing the images. FIGURE 2 A cool train, the Renfe AVE Class 102, nicknamed Pato because of its duck bill-like appearance. FIGURE 4 Nice CRH6A intercity electric multiple unit. 1 Principle of operation The way it works is that the camera has a single column of pixels (or in this case, two columns), that scans at a super high speed. The camaera is stationary, but as a tra

Topics: camera figure image line scan

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Did AYANEO just announce the first Snapdragon 8 Elite gaming handheld?

androidauthority.com Unknown 2025-11-05 23:57:54

TL;DR AYANEO just teased the KONKR Pocket FIT Elite, which may have a Snapdragon 8 Elite SoC. It would be the first gaming handheld with that chipset, which offers far more power than anything on the market. It will start at less than $399, with a Snapdragon G3 Gen 3 variant starting at less than $329. This week has been crazy for gaming handhelds, with two new dual-screen devices dropping at exceptionally competitive prices. This morning, at a sharing session for the first device from AYANEO

Topics: ayaneo elite fit pocket snapdragon

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Converting an online game to work without any JavaScript

news.ycombinator.com Unknown 2025-11-01 09:39:15

Topics: #development Client-side rendering has become the dominant paradigm for building web apps. But frameworks like React can lead to major JavaScript execution bottlenecks during page load. For many web developers there’s a clear solution for this: Ship less JavaScript to the browser. Whether websites have to work without any JavaScript at all is a question almost as old as the web itself. By now, the answer is clear: No, they don’t. It’s firmly established that websites should be more tha

Topics: javascript like page rendering server

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The best AirTag alternative for Samsung users is currently 30% off

zdnet.com Kerry Wan 2025-11-05 22:00:20

Samsung Galaxy SmartTag 2 in white. Kerry Wan/ZDNET Follow ZDNET: Add us as a preferred source on Google. Bluetooth trackers are a handy piece of technology because they provide a cheap and easy way to locate lost items like your keys or pets that made a break for it. One of the better options out there is the Galaxy SmartTag2, which is currently on sale. On Samsung's website, the single-pack Galaxy SmartTag2 is retailing for $21, a 30% price drop. This deal applies to both the black and whit

Topics: deal galaxy samsung smarttag2 zdnet

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Websites and web developers mostly don't care about client-side problems

news.ycombinator.com Unknown 2025-11-05 18:09:11

You're using a tool with a too-generic User-Agent You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace, the wiki thing it's part of. Unfortunately whatever you're using to do so has a HTTP User-Agent header value that is too generic or otherwise excessively suspicious. Unfortunately, as of early 2025 there's a plague of high volume crawlers (apparently in part to gather data for LLM training) that behave like this. To reduce th

Topics: agent generic http user using

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Latest Tech News

What Is the Magnetic Constant, and Why Does It Matter?

Prediction-Encoded Pixels image format

SpaceX’s latest Dragon mission will breathe more fire at the space station

Next set of VC judges locked in for Startup Battlefield 200 at TechCrunch Disrupt 2025

A four-pack of Apple AirTags drops to $70 for Labor Day

Google will soon make it easier to find out what’s wrong with your Pixel (APK teardown)

SmallJS: Smalltalk-80 that compiles to JavaScript

The Mysterious Shortwave Radio Station Stoking US-Russia Nuclear Fears

Pro by Déesse Pro Review: Mostly a Gimmick

Show HN: Bicyclopedia

Premier League Soccer: Stream Everton vs. Brighton Live From Anywhere

Premier League Soccer: Stream Crystal Palace vs. Nottingham Forest Live From Anywhere

Premier League Soccer: Stream Fulham vs. Man United Live From Anywhere

The Hidden Ingredients Behind AI’s Creativity

Best 360 Cameras (2025), Tested and Reviewed

How to Fix Your Context

How to build a coding agent

What Is the Magnetic Constant and Why Does It Matter?

Ninja Gaiden: Ragebound is a perfect reimagining of the classic series

Show HN: How to Build a Coding Agent (free workshop)

Apple AirTag 2 Rumors: New Features and Possible Release Date Leaked

English Premier League Soccer: Livestream Brentford vs. Aston Villa From Anywhere

How to Fight Food Noise if It’s Taking Over Your Life, Both IRL and Online

Premier League Soccer: Stream Arsenal vs. Leeds Live From Anywhere

Exploring EXIF (2023)

Line scan camera image processing for train photography

Did AYANEO just announce the first Snapdragon 8 Elite gaming handheld?

Converting an online game to work without any JavaScript

The best AirTag alternative for Samsung users is currently 30% off

Websites and web developers mostly don't care about client-side problems

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