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Stone–Wales Transformations

news.ycombinator.com Unknown 2025-08-03 16:07:12

Buckminsterfullerene is a molecule shaped like a soccer ball, made of 60 carbon atoms. If one of the bonds between two hexagons rotates, we get a weird mutant version of this molecule: This is an example of a Stone-Wales transformation: a 90° rotation in a so-called ‘π bond’ between carbon atoms. Here’s how it works in graphene: Graphene is a sheet of carbon molecules arranged in hexagons. When they undergo a Stone–Wales transformation, we get a Stone–Wales defect with two pentagons and two he

Topics: graphene hexagons stone transformation wales

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10 Best Android Phones of 2025, Tested and Reviewed

wired.com Julian Chokkattu 2025-08-03 14:07:00

Other Phones to Consider We test a ton of Android phones. We like the ones below, but you'll be better off with one of the options above. If you haven't yet done so, check out our Best Cheap Phones and Best Folding Phones guides for more. Pixel 9 Photograph: Julian Chokkattu Google Pixel 9 for $699: The Pixel 9 (9/10, WIRED Recommends) is a great smartphone, but between the Pixel 9a and the Pixel 9 Pro series, it struggles to stand out. It shares many features with its pricier siblings, but y

Topics: charger galaxy phone phones pixel

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Which smartphone has the best battery life? I tested dozens to find the winner

androidauthority.com Unknown 2025-08-03 17:30:00

If there’s one thing we all want from our next smartphone, it’s more battery life. Thankfully, battery cells are bigger than ever, while processors are increasingly frugal. This means that many, but certainly not all, flagship and mid-range handsets can take us through a day without leaving us suffering from battery anxiety. However, some phones are definitely better than others at lasting through more demanding work/life balances or taking lighter users through a second day. Not to mention, th

Topics: battery charging day life phone

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Yes, Motorola's $1,300 Razr Ultra competes with the Galaxy Z Flip 7 (and not just in price)

zdnet.com Kerry Wan 2025-08-03 14:10:14

ZDNET's key takeaways The $1,300 Motorola Razr Ultra is a high-performance flip phone with a unique design. Key upgrades make it a compelling option for foldable (and compact) phone enthusiasts, such as the 65W charging speed and 50MP ultrawide lens. The 4,700mAh battery looks great on paper, but yields average endurance from our testing. View now at Amazon View now at Best Buy View now at Motorola more buying choices The Motorola Razr Ultra is one of the most interesting phones I've tested t

Topics: flip motorola phone razr ultra

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2-4 wire converters / hybrids (2009)

news.ycombinator.com Rod Elliott - Elliott Sound Products 2025-07-30 20:37:50

Elliott Sound Products AN-010 2-4 Wire Converters / Hybrids Rod Elliott (ESP) The analogue telephone system is commonly known as the PSTN - public switched telephone network, but is also called POTS - plain old telephone system. It is characterised by the operating voltage of 48V DC supplied from the exchange when the phone is 'on-hook' (not connected to the local exchange), and around 5-12V when 'off-hook' (during a call). It's a 2-wire system, with simultaneous bidirectional communication. D

Topics: impedance loss phone telephone used

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After 24 hours with Samsung's Galaxy Z Flip 7, one big thing stands out

zdnet.com Sabrina Ortiz 2025-08-03 20:40:00

Sabrina Ortiz/ZDNET The Galaxy Z Flip lineup has been the most popular of Samsung's foldable devices, and its appeal is clear -- who can't benefit from a device with all the functionalities of a regular smartphone that can also shape-shift into a smaller phone for everyday ease? Also: My first 24 hours with the Galaxy Z Fold 7 left me completely mesmerized With its latest addition to the lineup, the Galaxy Z Flip 7, Samsung leaned into the phone's most attractive feature, making it even more

Topics: flip galaxy phone samsung screen

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After 24 hours with Samsung's Flip 7, one big thing stands out

zdnet.com Sabrina Ortiz 2025-08-04 01:40:11

Sabrina Ortiz/ZDNET The Galaxy Z Flip lineup has been the most popular of Samsung's foldable devices, and its appeal is clear -- who can't benefit from a device with all the functionalities of a regular smartphone that can also shape-shift into a smaller phone for everyday ease? Also: My first 24 hours with the Galaxy Z Fold 7 left me completely mesmerized With its latest addition to the lineup, the Galaxy Z Flip 7, Samsung leaned into the phone's most attractive feature, making it even more

Topics: flip galaxy phone samsung screen

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22 Best Prime Day Apple Deals—Including 40% Off AirPods

wired.com Adrienne So 2025-08-04 05:22:49

If you have one Apple product, you usually have them all—whether that's AirPods, an iPhone, an iPad, the Apple Watch, or the ubiquitous MacBook. One, or all of them, probably needs updating at any given time (it's usually the MacBook), and you now have four whole days of Prime Day deals to think about which one you're going to get. Not a Prime subscriber yet? Perhaps our list of Amazon Prime perks can convince you. Shop the best Prime Day Apple deals below. Read our Absolute Best Prime Day Deal

Topics: apple iphone like pro watch

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iPhone 17 Air suddenly sounds a lot more ‘Pro’ than we thought

9to5mac.com Ryan Christoffel 2025-08-02 10:38:06

This year’s most unique iPhone model will be the iPhone 17 Air, a brand new entry to Apple’s lineup. And while prior reports indicated it would have a lot in common with the base iPhone 17, new rumors make it sound a lot closer to the Pro models than we thought. Key iPhone 17 Air features will be more like Pro models This year, the iPhone 17 Air will replace the ‘Plus’ model in Apple’s lineup. And like previous Plus models, the Air was initially expected to share many features with the base i

Topics: 17 air iphone models pro

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Leaker teases Dynamic Island’s ‘significant evolution’ ahead

9to5mac.com Ryan Christoffel 2025-08-04 13:32:45

Rumors about the iPhone 17’s Dynamic Island are all over the place, with some trusted sources saying it’s not changing this year, while others report otherwise. Now, leaker Majin Bu has just teased the “significant evolution” Apple has planned for the feature. Dynamic Island could see big changes in coming years There’s a lot about the iPhone 17 line that seems pretty certain at this point. For example, the camera features of the iPhone 17 Pro and Pro Max, dimensions of the ultra-thin iPhone 1

Topics: 17 apple dynamic iphone island

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Last Chance Prime Day Deal: These Bluetooth Headphones Have Great Style, Unbelievable Battery Life and They've Never Been Cheaper

cnet.com See Full Bio 2025-08-04 12:12:00

Amazon Prime Day sale: Marshall's Major V headphones are worth it even at full price, but right now they're at an all-time low price of $100 -- or around 38% off. Move quickly though, because Prime Day ends today and this deal might not be sticking around. I might not be a true battle-tested headphone expert like CNET's David Carnoy, but I still love headphones and I'm confident in what I like about them. My most recent pickup, the Marshall Major V on-ear bluetooth headphones, quickly became a

Topics: day headphones marshall price ve

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iPhone 17 Colors: Rumor Has It This Could Be Apple's Full iPhone Color Lineup

cnet.com See Full Bio 2025-08-04 12:51:02

More iPhone 17 color rumors just landed. The most recent colorful rumor gives us a full lineup of what colors we can expect from the iPhone 17 base model and the rumored iPhone 17 Air. A user named yeux1122, released two images of camera covers which could be the full lineup for Apple. We've heard rumors that the iPhone 17 base model could come in purple, green and sky blue. But two other familiar colors are now rumored to be included in the options -- totaling five possibilities for the base m

Topics: 17 blue colors iphone pro

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Revolutionizing Compliance: The Promise of Graph RAG-Based Large Language Models

computer.org Joshua Roller 2025-08-04 16:05:05

Ensuring regulatory compliance is a high-stakes challenge across industries. Banks, payroll processors, and legal firms alike grapple with complex rules and massive data — and the consequences of failure are severe. In 2024, U.S. regulators fined Citigroup $136 million for falling short in fixing data management issues flagged years prior [1]. In another case, nine Wall Street companies paid $549 million in penalties after employees used unauthorized messaging apps that breached recordkeeping ru

Topics: ai compliance data graph rag

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My First Day With the Galaxy Z Fold 7: This Foldable Finally Feels Just Right to Me

cnet.com See Full Bio 2025-08-04 16:00:00

There's something slightly ironic about the superslim Galaxy Z Fold 7. Because the generous 6.5-inch cover screen feels much more normal than those found on previous versions of Samsung's foldable, I've hardly bothered opening the phone to use the sprawling inside display -- despite that kind of being the whole point. That's not a bad thing. Rather, it's a testament to how Samsung has managed to make both displays practical and useful. The cover screen no longer feels like an awkward compromise

Topics: cnet fold like phone screen

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New iPhone 17 Color Lineup Potentially Revealed in Leak

cnet.com See Full Bio 2025-08-04 16:15:00

A partial list of potential colors for Apple's upcoming iPhone 17 lineup is making the rounds. Fueled by the purported leak of two images showing camera covers from a user named yeux1122, Apple rumor sites have deduced that five colors for a base-model iPhone 17 and four colors for what's been referred to as a slimmer iPhone 17 Air have been revealed. So far, there's no similar leak for what colors a new iPhone 17 Pro or Pro Max would be available in, but there's speculation that we could see a

Topics: 17 apple colors iphone pro

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My favorite noise-canceling headphones for work and travel are on sale for 43% off

zdnet.com Cesar Cadenas 2025-08-04 21:21:43

ZDNET's key takeaways Available now for $200, Soundcore's new Space One Pro headphones improve on the original cans in almost every way. The new pair has powerful ANC, solid audio output, and a stylish yet comfortable design. They still don't have a proper carrying case, and certain features can ruin the listening experience. $119.99 at Amazon $125.99 at Walmart $119.99 at B&H Photo-Video more buying choices Soundcore's Space One Pro has recently dropped down to $114 a pair during Amazon Prim

Topics: anc headphones pro soundcore space

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I replaced my Samsung S25 Ultra with the Edge model for a month - and didn't regret it

zdnet.com Kerry Wan 2025-08-04 21:48:47

ZDNET's key takeaways The Samsung Galaxy S25 Edge currently sells for $999 for the 12GB of RAM and 512GB of storage configuration. It's an ultra-slim and lightweight flagship phone that makes any other device feel outdated. You'll have to settle with subpar battery life and the absence of a telephoto lens due to the limited size. View now at Amazon View now at Best Buy View now at Samsung more buying choices During Amazon Prime, you can pick up the Samsung Galaxy S25 Edge in the 512GB variant

Topics: battery edge phone s25 samsung

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Your iPhone 17 Could Be Purple, Green or Light Gold, According to Purported Leak

cnet.com See Full Bio 2025-08-05 00:15:32

A partial list of colors that Apple's upcoming iPhone 17 lineup could be available in is making the rounds. Fueled by the purported leak of two images showing camera covers from a user named yeux1122, Apple rumor sites have deduced that five colors for a base-model iPhone 17 and four colors for what's been referred to as a slimmer iPhone 17 Air have been revealed. So far, there's no similar leak for what colors a new iPhone 17 Pro or Pro Max would be available in, but there's speculation of a s

Topics: 17 apple blue colors iphone

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Security Bite: Fake iPhone virus pop-ups have made it on YouTube

9to5mac.com Arin Waichulis 2025-08-05 05:09:57

9to5Mac Security Bite is exclusively brought to you by Mosyle, the only Apple Unified Platform. Making Apple devices work-ready and enterprise-safe is all we do. Our unique integrated approach to management and security combines state-of-the-art Apple-specific security solutions for fully automated Hardening & Compliance, Next Generation EDR, AI-powered Zero Trust, and exclusive Privilege Management with the most powerful and modern Apple MDM on the market. The result is a totally automated Appl

Topics: app apple iphone security work

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iPhone 17 Pro: New images could be best look yet at coming redesign

9to5mac.com Ryan Christoffel 2025-08-04 09:06:12

Apple’s big iPhone 17 Pro launch event isn’t too far away now, and recently the number of dummy models showing what to expect from the new lineup have been improving. The latest offers a great look at what the iPhone 17 Pro might look like in black, with a redesigned ‘camera bar’ and repositioned Apple logo. Black iPhone 17 Pro dummy model shows camera bar, repositioned logo Earlier this week, leaker Majin Bu shared video of an iPhone 17 Air dummy model in a beautiful black finish. The video

Topics: 17 apple camera iphone pro

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The Galaxy Z Fold 7 just sold me on a foldable iPhone

9to5mac.com Marcus Mendes 2025-08-05 12:24:54

For years, I’ve been snickering at foldable phones, the perpetual “next big thing” that never quite gets here. And while I still think Samsung is mostly winning in this market by walkover, the Galaxy Z Fold 7 might have just made Apple’s case for what a foldable iPhone could look like. And I like it. The double-stacked tradeoff was always a dealbreaker Ever since its first edition, Samsung’s flagship foldable has looked to me like a bulky prototype that somehow escaped the lab. Sure, the compa

Topics: fold foldable galaxy iphone like

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Leak reveals new iPhone 17 color lineup, here’s what’s coming

9to5mac.com Ryan Christoffel 2025-08-05 13:26:39

Colors are often one of the last details to leak about new products, and now that we’re less than two months out from the expected iPhone 17 unveiling, a new leak has revealed what color lineup to expect from two different upcoming models. iPhone 17 coming in five colors, iPhone 17 Air in four per leak Today leaker yeux1122 has posted images that purportedly depict leaked camera components from Apple’s new iPhones. The specific component is the protector ring that surrounds the camera lens.

Topics: 17 color colors iphone new

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The Bose QuietComfort headphones are still on sale for $199 on the last day of Prime Day

engadget.com Unknown 2025-08-05 13:11:27

Engadget has been testing and reviewing consumer tech since 2004. Our stories may include affiliate links; if you buy something through a link, we may earn a commission. Read more about how we evaluate products . Noise-cancelling headphones are a must if you're traveling or hoping to get some work done without distractions wherever you may be. Prime Day deals include a bunch of the most popular headphones and earbuds for less, like the Bose QuietComfort headphones. These cans are down to $199 r

Topics: day deals headphones include prime

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Why Buy Flagship Phones if 'Budget' Phones Are Just as Good Now?

cnet.com See Full Bio 2025-08-05 12:00:09

The concept of a budget-friendly phone lost its meaning this week when Samsung announced its new Galaxy Z Flip 7 FE costs an eye-watering $900. It's similar in looks and ability to its premium-model sister phone, and it even has the same cameras. Earlier this year, Apple released its more budget-friendly iPhone 16E, which also got jeers for an higher-than-expected price of $600. It carries the same processor as the main iPhone 16, but lacks one rear camera. The cost of phones is expected to co

Topics: apple budget iphone phone tech

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The 32 Best Deals at Walmart’s Competing Prime Day Sale

wired.com Scott Gilbertson 2025-08-05 13:24:59

Amazon Prime Day isn't just Amazon; competitors get in on the action, too. We found plenty of great Walmart deals on many of our favorite tech items, like Apple laptops, Sony televisions, Garmin fitness trackers, and more. WIRED only recommends deals on products we’ve tested and approved, and which are actually discounted. If you’re looking for up-to-the-minute coverage of deals, check out our Amazon Prime Day liveblog, which will run from 5 am to midnight daily. Looking elsewhere? Here are the

Topics: best deals great photograph price

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Prime Day finale slashes Sony ULT WEAR headphones to just $128

androidauthority.com Unknown 2025-08-06 03:00:00

Chris Thomas / Android Authority Sony ULT WEAR headphones are currently seeing a huge price drop on the final day of the Prime Day sale. For a limited time, these headphones are available for just $128 on Amazon, down from their regular price of $199.99. This 36% discount is the lowest we’ve seen this year, making it a compelling offer for audiophiles and everyday listeners alike. Sony ULT WEAR Headphones for $128 (36% off) Known for their bass-centric design, the Sony ULT WEAR headphones are

Topics: headphones limited sony ult wear

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My first 24 hours with the Galaxy Z Fold 7 left me completely mesmerized

zdnet.com Kerry Wan 2025-08-05 23:30:18

Kerry Wan/ZDNET Has Samsung finally done it? I've been asking myself that question this whole day, as I've been going about life with the Galaxy Z Fold 7. By now, my previous daily driver, the Pixel 9 Pro, devoid of SIM cards and battery life, has been relegated to my drawer of forgottenness. With a foldable this thin, light, and capable, it just had to be this way. Also: Everything announced at Samsung Unpacked: Galaxy Z Fold 7, Flip 7, Watch 8 Series, more Samsung's latest Z Fold 7 looks an

Topics: best fold like phone samsung

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Your Garmin watch just got a major upgrade that makes traveling so much easier

zdnet.com Matthew Miller 2025-08-06 00:00:15

The big screen of the Venu X1 is perfect for Google Maps. Matthew Miller/ZDNET It's summer in New York, and I'm currently navigating around the city, phone in-hand for navigation. Like everyone else, I use Google Maps religiously when I travel: going from the airport to the hotel and to various destinations around town. But I don't actually like being glued to my phone the whole time to check turns, train transfers, and directions. Also: The best Garmin watches you can buy: Strong tracking tec

Topics: garmin google maps phone venu

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5 iPhone 17 Pro Max Rumors Are Making Me Rethink My Next Upgrade

cnet.com See Full Bio 2025-08-06 01:44:03

The reveal of the next iPhone 17 models is still two months away, but rumors of their features, looks and specs are in full bloom right now. Normally I'd wait to see what Apple actually announces, but several leaks about the iPhone 17 Pro Max in particular have caught my attention. And because now is when people start thinking about fall budgets and whether their current iPhone can make it until new ones are here, it seems like a good time to dive in. After all, two months is going to zip by fas

Topics: 17 apple camera iphone pro

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Prime Day 2025: The best headphone and earbud deals from Sony, Beats, Bose and more for the last day of the sale

engadget.com Unknown 2025-08-06 01:40:37

Engadget has been testing and reviewing consumer tech since 2004. Our stories may include affiliate links; if you buy something through a link, we may earn a commission. Read more about how we evaluate products . Deals on gear from Bose, Sony, Sonos and others are still in stock. Prime Day will soon come to a close, and when it does, you’ve missed your chance at some of the best headphone and earbud deals of the year. There are still great options available from a lot of big names, and since w

Topics: day deals earbuds headphones prime

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Latest Tech News

Stone–Wales Transformations

10 Best Android Phones of 2025, Tested and Reviewed

Which smartphone has the best battery life? I tested dozens to find the winner

Yes, Motorola's $1,300 Razr Ultra competes with the Galaxy Z Flip 7 (and not just in price)

2-4 wire converters / hybrids (2009)

After 24 hours with Samsung's Galaxy Z Flip 7, one big thing stands out

After 24 hours with Samsung's Flip 7, one big thing stands out

22 Best Prime Day Apple Deals—Including 40% Off AirPods

iPhone 17 Air suddenly sounds a lot more ‘Pro’ than we thought

Leaker teases Dynamic Island’s ‘significant evolution’ ahead

Last Chance Prime Day Deal: These Bluetooth Headphones Have Great Style, Unbelievable Battery Life and They've Never Been Cheaper

iPhone 17 Colors: Rumor Has It This Could Be Apple's Full iPhone Color Lineup

Revolutionizing Compliance: The Promise of Graph RAG-Based Large Language Models

My First Day With the Galaxy Z Fold 7: This Foldable Finally Feels Just Right to Me

New iPhone 17 Color Lineup Potentially Revealed in Leak

My favorite noise-canceling headphones for work and travel are on sale for 43% off

I replaced my Samsung S25 Ultra with the Edge model for a month - and didn't regret it

Your iPhone 17 Could Be Purple, Green or Light Gold, According to Purported Leak

Security Bite: Fake iPhone virus pop-ups have made it on YouTube

iPhone 17 Pro: New images could be best look yet at coming redesign

The Galaxy Z Fold 7 just sold me on a foldable iPhone

Leak reveals new iPhone 17 color lineup, here’s what’s coming

The Bose QuietComfort headphones are still on sale for $199 on the last day of Prime Day

Why Buy Flagship Phones if 'Budget' Phones Are Just as Good Now?

The 32 Best Deals at Walmart’s Competing Prime Day Sale

Prime Day finale slashes Sony ULT WEAR headphones to just $128

My first 24 hours with the Galaxy Z Fold 7 left me completely mesmerized

Your Garmin watch just got a major upgrade that makes traveling so much easier

5 iPhone 17 Pro Max Rumors Are Making Me Rethink My Next Upgrade

Prime Day 2025: The best headphone and earbud deals from Sony, Beats, Bose and more for the last day of the sale

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