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Automatic differentiation can be incorrect

news.ycombinator.com Christopher Rackauckas 2025-09-18 19:01:35

ISCL Seminar Series The Numerical Analysis of Differentiable Simulation: How Automatic Differentiation of Physics Can Give Incorrect Derivatives Scientific machine learning (SciML) relies heavily on automatic differentiation (AD), the process of constructing gradients which include machine learning integrated into mechanistic models for the purpose of gradient-based optimization. While these differentiable programming approaches pitch an idea of “simply put the simulator into a loss function a

Topics: ad differentiable greater numerical sciml

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Automatic Differentiation Can Be Incorrect

news.ycombinator.com Christopher Rackauckas 2025-09-19 05:01:35

ISCL Seminar Series The Numerical Analysis of Differentiable Simulation: How Automatic Differentiation of Physics Can Give Incorrect Derivatives Scientific machine learning (SciML) relies heavily on automatic differentiation (AD), the process of constructing gradients which include machine learning integrated into mechanistic models for the purpose of gradient-based optimization. While these differentiable programming approaches pitch an idea of “simply put the simulator into a loss function a

Topics: ad differentiable greater numerical sciml

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I ditched my flagship for a mid-range phone and don’t regret it

androidauthority.com Unknown 2025-09-24 12:00:32

Joe Maring / Android Authority I did it. After years of exclusively buying and using flagship phones, I finally made the switch to a mid-ranger. And you know what? I don’t regret it. Not even a little. For the last decade, I’ve used high-end phones from brands like OnePlus and Google. After recently breaking my phone and shopping for a new one, I skipped the new Pixel 10 series I had my eye on and bought the Pixel 9a. This decision made me realize that today’s mid-range phones are not just goo

Topics: 9a great mid phone pixel

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De-Clouding: Music

news.ycombinator.com Ross Wintle 2025-09-25 05:13:43

I’m going through a phase of figuring out what I can get out of the cloud and “own”. Particularly with regard to streaming services. I’ve never paid for Spotify. But I’ve had iTunes Match so that I can take all of the weird, not-on-streaming music that I have (I wrote about this back in 2013!!!!), and we have an Apple One family plan that gets us all Apple Music – this was the best deal for us as a family when we signed up. But now I’m wanting to own my music again. For a while I’ve been tryi

Topics: apple cloud great music ve

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Rode's Wireless Go III wireless microphone is cheaper than ever

engadget.com Unknown 2025-10-02 13:22:31

The Rode Wireless Go III wireless microphone is down to $199 via Amazon . This is a record-low price and represents a discount of 30 percent, as it typically costs $285. The deal applies to all 13 colorways. This one made our list of the best mobile microphones . It strikes a good balance between features and value, which is especially true right now. The mic offers great sound, onboard storage, 32-bit float and universal compatibility with iPhones, Android, cameras and PCs. The various colorw

Topics: advertisement colorways great mic microphone

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The subjective experience of coding in different programming languages (2023)

news.ycombinator.com Unknown 2025-10-02 18:31:14

Different programming languages feel viscerally different, right? I can’t be the only one. It’s so embodied. When I’m deep in multiple nested parentheses in a C-like language, even Python, I feel precarious, like I’m walking a high wire or balancing things in my hands and picking my way down steep stairs. It’s a relief to close the braces. Like if I’m trying to cover all the conditions in a complicated state machine or a conditional, I’m high up. I often hold my breath. Functional languages a

Topics: code feel great like sense

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The subjective experience of coding in different programming languages

news.ycombinator.com Unknown 2025-10-02 23:31:14

Different programming languages feel viscerally different, right? I can’t be the only one. It’s so embodied. When I’m deep in multiple nested parentheses in a C-like language, even Python, I feel precarious, like I’m walking a high wire or balancing things in my hands and picking my way down steep stairs. It’s a relief to close the braces. Like if I’m trying to cover all the conditions in a complicated state machine or a conditional, I’m high up. I often hold my breath. Functional languages a

Topics: code feel great like sense

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Our Favorite Budget TV Is Only $264 at Walmart

wired.com Brad Bourque 2025-10-04 17:48:46

Don't want to shell out big bucks on a new television? Walmart is offering an $86 discount on our favorite budget TV. This 55-inch 4K panel from Vizio comes in well under $300, a downright steal for the features on offer here, which includes Dolby Vision, Variable Refresh Rate, and a great smart interface. Our reviewer Parker Hall called the picture “bright and punchy” and support for Dolby Vision sweetened the deal. It also supports HDR10+, HDR10, and HLG, so you have a wide array of options f

Topics: features great refresh screen support

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Age Simulation Suit

news.ycombinator.com Wolfgang Moll 2025-10-11 08:41:24

GERonTologic simulator GERT The age simulation suit GERT offers the opportunity to experience the impairments of older persons even for younger people. The age-related impairments are: ■ opacity of the eye lens ■ narrowing of the visual field ■ high-frequency hearing loss ■ head mobility restrictions ■ joint stiffness ■ loss of strength ■ reduced grip ability ■ reduced coordination skills GERT for only 1390,‑ / £ 1250,- complete as pictured, plus shipping and VAT if applicable N

Topics: age gert great loss orders

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The Best Bluetooth Speaker Is $20 Off

wired.com Brad Bourque 2025-10-13 13:11:05

Trying to boost the volume at your end-of-summer parties? The JBL Flip 7 (9/10, WIRED Recommends) is discounted by $20 on Amazon, bringing the price down to just $130. That might not sound like a huge discount, but it brings it more in line with its competitors, and temporarily erases the price bump from the previous version. We've given high marks to several rounds of the JBL Flip series speakers, thanks to their great battery life, portable form factor, and impressive volume. JBL upgraded thi

Topics: flip great jbl speaker volume

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Inside the World of "The Great British Bake Off"

news.ycombinator.com Unknown 2025-10-10 18:25:36

One evening in the autumn of 2012, I got a somewhat urgent phone call from my mom. I was living in a quasi-legal student sublet at the time—the landlord had hooked the electricity up to the street lights outside—and she wanted to recommend a baking show that might distract me from the rats under the floor. Think “MasterChef” but with the pacing of an afternoon spent punting on the Thames. The bakers were normal people: a shop worker, a vicar’s wife, a searingly competitive sixty-three-year-old B

Topics: bake bakers baking great people

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Save 20 Percent on Our Favorite Android Earbuds

wired.com Brad Bourque 2025-10-25 01:29:24

Looking to upgrade your wireless earbuds without reaching deep into your wallet? Our favorite earbuds for most people, the Nothing Ear (a) (8/10, WIRED Recommends) are currently marked down to just $79 when you buy them from Nothing directly. They may be cheap when it comes to dollars spent, but they have it where it counts, with great audio quality, an excellent feature set, and awesome battery life. While the first-party offerings from both Apple and Google make for compelling options, the No

Topics: ear earbuds great sound wireless

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The best foldable phones of 2025: Expert tested and reviewed

zdnet.com Kerry Wan 2025-10-27 15:00:22

Why we like it: Samsung made an astonishing leap forward in its 2025 foldable phones, which was great to see after several years of iterative designs. The new Z Fold 7 features its thinnest (4.2 mm) and lightest (215 grams) design yet, making the device feel more like a traditional handset when folded, and a super sleek tablet when unfolded. It helps that the Android operating system has been steadily improving for foldables as well. More and more apps are starting to take advantage of the extr

Topics: apps fold great phone samsung

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The Best Cheap TVs (2025): TCL, Hisense, and More

wired.com Ryan Waniata 2025-10-30 10:03:00

It's a great time to buy a budget TV. With TVs getting better and brighter each year, and the economy doing … whatever it's doing, investing in the best cheap TV for your money could be the perfect thing for you. Don't just grab the first random model that pops up on Amazon, though, as some just aren't that great. That's why we spend hundreds of hours testing dozens of screens of all levels to ensure that only TVs with solid performance and great daily usability made the cut. Whether you need a

Topics: best doing great tv tvs

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The Best Big Screen Chromebook Is on Sale Now

wired.com Brad Bourque 2025-10-30 21:55:03

Back to school is always a great time to pick up a deal on a new laptop for the upcoming semester, and the Asus CX15 Chromebook is available at Walmart for $159. It may not be the fanciest option, but it has a sizable screen and a full keyboard with a numpad, all for less than the cost of a new textbook. If you're just looking for a no-frills Chromebook for occasional web-based work and a slightly larger display, this is a great deal. When it comes to performance, the CX15 isn't terribly exciti

Topics: asus chromebook cx15 great isn

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The Best Big Screen Chromebook Is On Sale Now

wired.com Brad Bourque 2025-10-31 07:55:03

Back to school is always a great time to pick up a deal on a new laptop for the upcoming semester, and the Asus CX15 Chromebook is available at Walmart for $159. It may not be the fanciest option, but it has a sizable screen and a full keyboard with a numpad, all for less than the cost of a new textbook. If you're just looking for a no-frills Chromebook for occasional web-based work and a slightly larger display, this is a great deal. When it comes to performance, the CX15 isn't terribly exciti

Topics: asus chromebook cx15 great isn

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China’s Great Firewall Mysteriously Severed Connection to the World for an Hour

gizmodo.com Aj Dellinger 2025-11-02 14:25:05

For about an hour on Wednesday, China appeared to go dark—or at least internet access across the country did. According to an analysis published by the Great Firewall Report, a group that monitors internet censorship efforts in China, something happened in the wee hours of Wednesday morning that resulted in China blocking almost all traffic to TCP port 443, the standard port for HTTPS traffic. Between the hours of 12:34 and 1:48 AM in Beijing, someone was observed “unconditionally injecting for

Topics: access china firewall great port

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HBO launches new Harry Potter immersive environment on Apple Vision Pro

9to5mac.com Chance Miller 2025-11-03 14:10:42

HBO Max has been a strong supporter of Apple Vision Pro from the start, offering a robust native app for visionOS with a Game of Thrones immersive environment. Today, HBO has announced an update to the visionOS app with an all-new environment: Hogwarts Great Hall. The Hogwarts Great Hall immersive environment will be familiar to Harry Potter fans, as it’s one of the most iconic rooms at the Hogwarts School of Witchcraft and Wizardry in the series. The environment on Apple Vision Pro offers se

Topics: app environment great hbo hogwarts

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Free Movies You Can Stream This August on Tubi, Fawesome and More

cnet.com See Full Bio 2025-12-03 06:00:03

If you've grown tired of relentless price hikes from your favorite streaming platforms, it's nice to know that free TV services like Tubi, Fawesome and Pluto TV can be counted on for all kinds of great shows and movies. New films (and TV shows) arrive on these platforms every month, making them great options if you're looking for something cheap but with great options. On Tubi, you can check out new originals that arrive throughout the month, including the thrillers The Ultimate Vendetta, now a

Topics: great month new tubi tv

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Actions Reflect Your Priorities

news.ycombinator.com Unknown 2025-12-15 17:27:57

Read in Browser July 29, 2025 Every week, I sit down to reflect on the events of the week, extract their lessons, and gameplan how to apply those lessons toward greatness and growth. It’s a system that has always worked for me, it can work for you too. Welcome to The 199! Sign up here if this email was forwarded to you. Your actions reflect your priorities It’s been more than a week since Scottie Scheffler won The Open at Royal Portrush. Yet he is still doing interviews about an answer he gave

Topics: care day great life satisfaction

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Best Noise-Canceling Headphones: Sony, Bose, Apple, and More

wired.com Parker Hall 2025-12-22 21:03:00

Honorable Mentions Now that the majority of new headphones and earbuds offer at least a modicum of noise canceling, it'd be impossible (and unproductive) to list everything we like above. If you haven't yet found your fit, here are more favorites worth considering. Beyerdynamic Amiron 300 for $280: These simple-looking earbuds (8/10, WIRED Recommends) are a great way to experience quiet luxury. They have 10 hours of battery life with noise canceling engaged, and they have some of the best-soun

Topics: canceling earbuds great noise sound

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The GameSir G8 Plus Is a Solid Mobile Controller, With One Big Caveat

cnet.com See Full Bio 2026-01-05 08:00:05

GameSir G8 Plus $80 at Amazon Pros Great hardware Fits phones and small tablets Extra back buttons Good battery life Cons Buggy app No extra faceplates available No case included If you don't think gaming on your phone could be fun, you've likely never tried using it with a controller. Once you do, you'll realize why mobile gaming is continuing to grow exponentially. It really is, pun very much intended, a game-changer. There are a ton of mobile controllers out there. Most of them are bad

Topics: app g8 gamesir great plus

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Weave (YC W25) is hiring an AI engineer

news.ycombinator.com Unknown 2026-01-11 12:00:47

At Weave, we’re building the best software for the best engineering teams to move faster, and we want to hire exceptional engineers to help us do so. We are a well-funded startup, backed by top investors, growing rapidly and currently profitable. You'll be working directly with me (Andrew), the CTO. Before I was CTO of Weave I was the founding engineer at Causal, and I want to give you all the support and growth opportunities in this role that I got when I went through it. You’ll also be work

Topics: building engineer great ll weave

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The 25 Best Non–Prime Day Deals From Retailers That Are Not Amazon

wired.com Simon Hill 2026-01-18 12:38:31

Prime Day started as a one-day sale, but Amazon has expanded it to nearly a week in its pursuit of absolute ecommerce dominance. We were all sucked in by fast shipping and low prices, but if you’re wary of feeding the beast, you needn’t go without great deals on tech. Plenty of other retailers are offering discounts and bargains this week, including Walmart, REI, Target, Wayfair, Best Buy, and Home Depot. You can also snag deals on many of the best tech devices direct from the manufacturers. Her

Topics: 10 best great recommends wired

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The Best Anti-Prime Day Sales to Shop Before They're Over

wired.com Nena Farrell 2026-01-19 22:10:30

If you're over seeing what you could buy on Amazon but still want to shop good sales, this is the story for you. We've hunted the web for all the sales going on with small businesses we love, ranging from outdoor pizza ovens to the best iPhone accessories, and even some local bookstores. Shop all the sales below that are still happening today before they're over (most end at midnight tonight!). Open to more true Prime Day shopping? Don't miss our guide to the Best Prime Day Deals, plus our Prim

Topics: amazon great sale shop stove

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

wired.com Scott Gilbertson 2026-01-21 08:24:59

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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The 27 Best Deals at Walmart’s Competing Prime Day Sale

wired.com Scott Gilbertson 2026-01-22 10:13:17

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 actually 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

Topics: best deals great photograph price

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13 Best Amazon Prime Day Vacuum Deals for Dust and Dirt in 2025

wired.com Nena Farrell 2026-01-22 17:52:10

Cleaning isn't just for spring, and these Amazon Prime Day vacuum deals are ones you can't miss if you're looking for a better vacuum. The insanity of summer—beach days! sunscreen spills! sticky ice cream!—leaves me cleaning more often than in the springtime or any other season. A great vacuum makes a huge difference. Whether I'm grabbing my favorite stick vacuum for the stairs, a car vacuum for my Sisyphean car mess, or a Dyson to solve all my problems, you can usually find me with a vacuum in

Topics: best great robot vac vacuum

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The 27 Best Deals at Walmart's Competing Prime Day Sale

wired.com Scott Gilbertson 2026-01-22 22:13:17

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 actually 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

Topics: best deals great photograph price

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The 22 Best Non–Prime Day Deals From Retailers That Are Not Amazon

wired.com Simon Hill 2026-01-23 03:03:05

Prime Day started as a one-day sale, but Amazon has expanded it to nearly a week in its pursuit of absolute ecommerce dominance. We were all sucked in by fast shipping and low prices, but if you’re weary of feeding the beast, you needn’t go without great deals on tech. Plenty of other retailers are offering discounts and bargains this week, including Walmart, REI, Target, Wayfair, Best Buy, and Home Depot. You can also snag deals on many of the best tech devices direct from the manufacturers. He

Topics: 10 best great recommends wired

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Latest Tech News

Automatic differentiation can be incorrect

Automatic Differentiation Can Be Incorrect

I ditched my flagship for a mid-range phone and don’t regret it

De-Clouding: Music

Rode's Wireless Go III wireless microphone is cheaper than ever

The subjective experience of coding in different programming languages (2023)

The subjective experience of coding in different programming languages

Our Favorite Budget TV Is Only $264 at Walmart

Age Simulation Suit

The Best Bluetooth Speaker Is $20 Off

Inside the World of "The Great British Bake Off"

Save 20 Percent on Our Favorite Android Earbuds

The best foldable phones of 2025: Expert tested and reviewed

The Best Cheap TVs (2025): TCL, Hisense, and More

The Best Big Screen Chromebook Is on Sale Now

The Best Big Screen Chromebook Is On Sale Now

China’s Great Firewall Mysteriously Severed Connection to the World for an Hour

HBO launches new Harry Potter immersive environment on Apple Vision Pro

Free Movies You Can Stream This August on Tubi, Fawesome and More

Actions Reflect Your Priorities

Best Noise-Canceling Headphones: Sony, Bose, Apple, and More

The GameSir G8 Plus Is a Solid Mobile Controller, With One Big Caveat

Weave (YC W25) is hiring an AI engineer

The 25 Best Non–Prime Day Deals From Retailers That Are Not Amazon

The Best Anti-Prime Day Sales to Shop Before They're Over

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

The 27 Best Deals at Walmart’s Competing Prime Day Sale

13 Best Amazon Prime Day Vacuum Deals for Dust and Dirt in 2025

The 27 Best Deals at Walmart's Competing Prime Day Sale

The 22 Best Non–Prime Day Deals From Retailers That Are Not Amazon

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