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Posit floating point numbers: thin triangles and other tricks (2019)

news.ycombinator.com Marc B. Reynolds 2025-09-08 05:42:03

WARNING: Some numerical analysis and mathematics will be mentioned in passing. Also the number systems will not be treated like black-boxes. Risk of physical injury, however, is negligible. I like magic tricks. Watching the performer do the show and attempting to catch the “slight-of-hand” that makes the impossible seem possible. It’s fun and makes me believe in magic for a few moments. So I’m going to give a shot at doing some floating point magic tricks. Throughout my performance I’ll use

Topics: ieee left posits right text

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Astronomers Suggest That Entire Stars Are Being Obscured by Giant "Lampshades" of Dark Matter

futurism.com Unknown 2025-09-08 07:30:31

Hunting for dark matter, the invisible substance thought to account for 85 percent of all mass in the cosmos, isn't easy. If it interacts with light at all, it does so incredibly weakly. Still, we can see its handiwork everywhere, with its gravitational pull determining the formation of everything from whole galaxies to individual stars. Now a team of astronomers is proposing a new technique for searching for dark matter — and it runs counter to its reputation as a completely invisible, light-i

Topics: dark light like machos matter

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The 6 Best OLED TVs (2025)

wired.com Ryan Waniata 2025-09-08 13:33:00

OLED is the best screen technology right now, which means the best OLED TVs provide the pinnacle of picture quality. Imagine a jet black screen in which each tiny pixel is controlled independently for an image that seems to appear from the void like magic. It’s almost hard to believe it’s real, and it keeps getting better. Display manufacturers like LG and Samsung have pushed OLED beyond expectations for brighter highlights, richer and more natural colors, and faster refresh rates to elevate eve

Topics: best like oled right tvs

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Citizen science illuminates the nature of city lights

news.ycombinator.com Author Notes 2025-09-06 07:25:22

The Nachtlichter app was developed within a project called Nachtlicht-BüHNE (Citizen-Helmholtz Network for research on night light phenomena)5, using a co-design process in which academic and citizen scientists met regularly over a several year period. Our co-design process, app methodology, site selection, systematic variability of the observations, data pre-processing and data structure have already been described in detail5. This section therefore briefly covers the data and validation and fo

Topics: areas data light lights number

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PWM flicker: Invisible light that's harming our health?

news.ycombinator.com Amber Case 2025-09-09 05:32:00

The Invisible Light That’s Harming Our Health — And How We Can Light Things Better Amber Case Follow 7 min read · 4 hours ago 4 hours ago -- Listen Share I recently spent a few weeks running a conference for a community of researchers and writers in a historic chateau in the French countryside. During this time, I also examined the history of the building and how texture, size and proportionality affected thinking in the space. This experience turned out to be a perfect illustration of how som

Topics: light lights pwm soda warm

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Honda joins space race with first successful reusable rocket test

techspot.com Shawn Knight 2025-09-10 01:41:00

What just happened? Add Honda to the growing list of entities interested in the modern space race. The Japanese automotive giant's research and development arm recently conducted a successful rocket launch and landing, marking the first time the company has safely landed a rocket after reaching a height of nearly 300 meters. The historic flight took place on June 17 at the Honda facility in Taiki Town, Hiroo District, Hokkaido Prefecture, Japan, which has been dubbed as a "space town" thanks to

Topics: flight honda meters rocket space

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Elon Says He’s Working to ‘Fix’ Grok After AI Disagrees With Him on Right-Wing Violence

gizmodo.com Matt Novak 2025-09-10 01:05:03

Billionaire conspiracy theorist Elon Musk really doesn’t like it when Grok says anything that contradicts his far-right worldview. And that’s exactly what his AI chatbot did late Tuesday when an X user asked whether people on the political right or the political left have been more violent since President Donald Trump was first elected in 2016. Grok said it was people on the right. Musk responded that he was working to fix Grok so it wouldn’t do that again. It all started on Tuesday in a tweet

Topics: grok left like musk right

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This Insignia 50″ Smart TV Drops Below the Price of the Same-Size Amazon Fire TV for a Limited Time

gizmodo.com Joe Tilleli 2025-09-10 05:10:54

It’s time to upgrade that smart TV you bought 10 years ago. Amazon has a wide range of TVs from all the big name providers and you can secure yourself something that looks great without breaking the bank. One of the major deals we’ve come across is for the Insignia 55-inch Class F50 Series LED 4K UHD Smart Fire TV. Typically priced at $300, right now you’d save a solid 40%. That brings the price down to just $180, saving you $120. This Insignia smart TV supports HDR 10, allowing for true darkne

Topics: insignia right smart sound tv

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Sensor Tower acquires Playliner to expand mobile games data

venturebeat.com Rachel Kaser 2025-09-10 09:11:47

Digital analysis and app data company Sensor Tower announced today that it has acquired Playliner, a mobile games Live Ops data provider, for an undisclosed sum. According to Sensor Tower, this will expand its analytical capabilities within the mobile gaming space, as Playliner can provide details on how such games maintain audiences and evolve over time. This is Sensor Tower’s second such acquisition, the first being Video Game Insights earlier this year. Playliner tracks and analyzes Live Ope

Topics: insights live mobile sensor tower

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6 Best Red Light Therapy Masks and LED Devices of 2025, Reviewed

wired.com Boutayna Chokrane 2025-09-10 09:11:00

If your skin is crying for help but you're too tired to care, the best red light therapy masks are the easiest fake-it-'til-you-make-it hack around. You might have seen a wave of people on social media channeling their best Hannibal Lecter while wearing an LED device—like our top pick, the CurrentBody LED Face Mask Series 2 ($470)—with red or blue light-emitting diodes. They’re not sipping Chianti, but instead claiming that the wrinkles and fine lines on their faces have disappeared with the hel

Topics: led light mask red skin

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macOS Tahoe’s new Spotlight clipboard manager leaves plenty of room for powerful third-party apps

9to5mac.com Marcus Mendes 2025-09-10 13:28:47

The new Spotlight is easily my favorite macOS announcement from WWDC25. It may even be my favorite update across all of Apple’s platforms this year. Still, I don’t plan on abandoning my current clipboard manager. Here’s why. The addition of a native clipboard history tool to macOS feels like one of those small but meaningful quality-of-life upgrades we’ve been waiting forever to get. That said… I’m not switching. Don’t get me wrong: I love that Apple is acknowledging clipboard history as a po

Topics: apple clipboard history like spotlight

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This battery floodlight camera is perfect for my dark yard (and just hit its lowest price)

zdnet.com Maria Diaz 2025-09-10 17:55:14

ZDNET's key takeaways The Blink Outdoor 4 Floodlight Camera is a practical, battery-powered solution for darker areas around your house that lack wiring and outlets. The AA batteries allow the floodlights to beam at 700 nits of brightness, which is not the most powerful on the market but good enough to see your surroundings. The Blink app is feature-rich, with plenty of camera settings to customize for the best surveillance, but you'll need a paid subscription to unlock the best features. $59.

Topics: blink camera floodlight outdoor plan

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Astronomers Capture the Most Colorful Image of a Galaxy Ever

gizmodo.com Passant Rabie 2025-09-10 21:00:05

Caldwell 65, better known as the Sculptor galaxy, is bursting with stellar activity and dust-rich features. Located 11 million light-years away—right next door in cosmological terms—it offers a rare glimpse of young stars being born into the celestial circle of life. Using the Very Large Telescope (VLT), astronomers captured an incredibly detailed image of the nearby spiral galaxy, displayed in thousands of colors that illuminate all the action taking place in our galactic neighborhood. The Eur

Topics: galaxy light sculptor stars study

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Asus urges users to update Armoury Crate due to serious security flaw

techspot.com Unknown 2025-09-11 17:36:00

The Armoury Crate app helps you manage every aspect of your rig - from initial setup to RGB illumination. Pinpoint the latest updates, drivers, manuals and offers, and connect instantly with your gaming peers. Can Armoury Crate be used with other hardware brands? No, Armoury Crate is designed to work exclusively with Asus-branded hardware. For other brands, you can use alternatives like MSI Center, Gigabyte Control Center, or third-party tools such as Signal RGB or FanControl. Why do I need A

Topics: armoury aura crate lighting service

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Canva expands from design into analytics with acquisition of MagicBrief

cnbc.com Jordan Novet 2025-09-12 01:00:02

From left, Cliff Obrecht, Canva's co-founder and chief operating officer, and George Howes, co-founder and CEO of MagicBrief, pose for a photo at the Cannes Lions festival in Cannes, France, in June 2025. Canva has grown into a $32 billion startup through its popular design tools used for easily creating images, marketing material and presentations. Now the company, with its 12th acquisition, is buying its way into the analytics market. Canva said on Tuesday that it's buying MagicBrief, whose

Topics: billion canva magicbrief obrecht said

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Astronomers Just Solved the Mystery of the Universe's Missing Matter

news.ycombinator.com Margherita Bassi 2025-09-12 00:44:14

Decades ago, astronomers estimated that “ordinary” matter (basically everything that isn’t dark matter or dark energy) makes up 5% of the universe. There was just one problem—they had no idea where most of it was. Astronomers from the Center for Astrophysics Harvard & Smithsonian (CfA) and the California Institute of Technology (Caltech) have tracked down the universe’s “missing” matter. Fast radio bursts (FRBs) indicate that over three-quarters of ordinary matter, officially called baryonic ma

Topics: frbs galaxies gas light matter

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Guidelines on how to be a scientific sleuth released

news.ycombinator.com Unknown 2025-09-12 09:12:30

![COSIG Logo][1] ### **Anyone can do post-publication peer review.** ### **Anyone can be a steward of the scientific literature.** ### **Anyone can do forensic metascience.** ### **Anyone can sleuth.** However, investigating the integrity of the published scientific literature often requires domain-specific knowledge that not everyone will have. This open source project is a collection of guides written and maintained by publication integrity experts to distribute this domain-specific knowledge

Topics: cosig guides https io osf

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Surgery Still Beats Ozempic and Other GLP-1 Drugs in Real-World Weight Loss Study

gizmodo.com Ed Cara 2025-09-12 09:05:43

When it comes to weight loss, surgery still reigns supreme. Research out today shows that people undergoing bariatric surgery tend to lose significantly more weight than people taking the newest, most effective GLP-1 medications for obesity. Scientists at New York University conducted the study, which analyzed real-world data from obesity patients. People who received surgery lost five times more weight over a two year span on average than those who were prescribed a GLP-1 drug, they found. The

Topics: drugs glp people surgery weight

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Scientists achieve 1,000-fold increase in solar electricity using ultra-thin layers

techspot.com Skye Jacobs 2025-09-12 13:03:00

Forward-looking: A team of German researchers from Martin Luther University Halle-Wittenberg has unveiled a significant advancement in solar energy technology, revealing a method to dramatically increase the amount of electricity certain materials can generate when exposed to light. Their approach involves stacking ultra-thin layers of different crystals in a precise sequence, resulting in a solar absorber that far outperforms traditional materials. At the core of this discovery, published in S

Topics: electricity layers light solar titanate

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AI copyright anxiety will hold back creativity

technologyreview.com Nitin Nohria 2025-09-12 07:00:00

During a later visit to a Picasso exhibit in Milan, I came across a famous informational diagram by the art historian Alfred Barr, mapping how modernist movements like Cubism evolved from earlier artistic traditions. Picasso is often held up as one of modern art’s most original and influential figures, but Barr’s chart made plain the many artists he drew from—Goya, El Greco, Cézanne, African sculptors. This made me wonder: If a generative AI model had been fed all those inputs, might it have pro

Topics: ai artistic copyright generative sheeran

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6 Tools for Tracking the Trump Administration’s Attacks on Civil Liberties

wired.com Lily Hay Newman 2025-09-11 07:00:00

In just a few months, Donald Trump’s second presidential term has drastically reshaped the United States federal government and moved to consolidate the power of the executive branch. At the behest of the president, numerous federal agencies have undertaken aggressive, invasive initiatives to crack down on immigration, police speech, investigate political opponents, curtail US public health efforts and emergency preparedness, and more. With so much happening at once, numerous organizations and

Topics: administration executive flights ice trump

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Philips’ new ambient wall light is now available

theverge.com Andrew Liszewski 2025-09-12 13:06:00

is a senior reporter who’s been covering and reviewing the latest gadgets and tech since 2006, but has loved all things electronic since he was a kid. Signify has officially announced its new Philips Hue Play Wall Washer light, which was previously leaked by Amazon UK earlier this month. The company has also launched its new Philips Hue AI assistant in the Netherlands, Belgium, and Luxembourg, with a broader global release expected by the end of August. Available now in Europe, the US, and Can

Topics: hue light philips wall washer

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Lawyers Just Discovered Something About Meta's AI That Could Cost Zuckerberg Untold Billions of Dollars

futurism.com Unknown 2025-09-12 16:09:59

A legal expert found that Meta's AI is able to spit out entire portions of books verbatim — and if he's right, it could be seriously bad news for the company and its CEO Mark Zuckerberg. First, a quick primer. All the AI that's commercially buzzy at the moment, like OpenAI's ChatGPT or Meta's Llama, is trained by feeding in huge amounts of data. Then researchers do a bunch of number crunching using algorithms, basically teaching the system to recognize patterns in all that data so thoroughly th

Topics: ai copyrighted lemley like meta

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Sitecore CMS exploit chain starts with hardcoded 'b' password

bleepingcomputer.com Unknown 2025-09-12 17:10:35

A chain of Sitecore Experience Platform (XP) vulnerabilities allows attackers to perform remote code execution (RCE) without authentication to breach and hijack servers. Sitecore is a popular enterprise CMS used by businesses to create and manage content across websites and digital media. Discovered by watchTowr researchers, the pre-auth RCE chain disclosed today consists of three distinct vulnerabilities. It hinges on the presence of an internal user (sitecore\ServicesAPI) with a hardcoded pa

Topics: attacker path sitecore upload watchtowr

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Stop Waking Up So Often to Pee in the Middle of The Night. Use These 5 Tips, Instead

cnet.com See Full Bio 2025-09-12 16:44:13

There's nothing worse than having to get up and leave your warm, cozy bed when the feeling of having to pee disrupts your sleep. What's even worse is if this happens to you multiple times during the night, significantly interfering with your sleep and making it harder for you to get through the next day. CNET Urine production typically decreases when you sleep, allowing 6 to 8 hours of uninterrupted rest. That's why bathroom breaks can be so annoying, preventing you from getting those hours of

Topics: bathroom day night nocturia pee

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Govee RGBIC Floor Lamp Hits Its Record Low Price, Create 16 Million DIY Colors With This Amazon Steal

gizmodo.com Jason Coles 2025-09-12 21:40:19

Of the many benefits of modern-day life, one of the most underrated is good mood lighting. After all, we don’t have to change the light bulb just to get a new color, and nor do we have to really put much effort in at all to change the mood. The world of smart lights and RGB lighting in general, has really helped on that front. If you’re looking for a really good option, then you’ll want to make the most of this 30% discount on the Govee RGBIC Floor Lamp. This sleek-looking device can help chang

Topics: change lamp light really room

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US Streetlights Are Turning Purple

news.ycombinator.com Karen Kwon 2025-09-09 03:04:40

American cities and towns started switching their streetlights from sodium lamps to LEDs about 15 years ago, which changed the color of many nighttime roads from yellowish orange to bright white. But lately an odd new nocturnal color has been spotted across the nation—and the globe. Anecdotal reports of purple-looking streetlights have been popping up since early 2021 in states including Florida, Utah, Texas and Massachusetts, as well as in Canada and Ireland. This phenomenon might seem weird b

Topics: blue light purple streetlights white

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No Hello

news.ycombinator.com Unknown 2025-09-13 13:09:22

Note that Keith could have got his answer minutes sooner, and needn't have kept Tim waiting. In fact, Tim could have started thinking about the question right away! People who do this are generally trying to be polite by not jumping right into the request, like one would in person or on the phone - and that's great! But it's 2022 and chat is neither of those things. For most people, typing is much slower than talking. So despite best intentions, you're actually just making the other person wait

Topics: got people person question right

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Twelve South AirFly Pro 2 Review: Add Bluetooth to Every Flight

cnet.com See Full Bio 2025-09-13 13:00:06

8.6 / 10 SCORE Twelve South AirFly Pro 2 Pros Add Bluetooth 5.3 connectivity to just about anything Tiny A little easier to use than its predecessor Cons A little more expensive than its predecessor Minor lip-sync delay due to Bluetooth connection Not (quite) as necessary as it once was It can be extremely frustrating to spend a bunch of money on a great set of noise-canceling headphones, only to get on your first flight with them and find out you can't hear the in-flight entertainment. Wh

Topics: airfly bluetooth flight headphones pro

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Identity Assertion Authorization Grant

news.ycombinator.com Aaron Parecki 2025-09-09 14:57:14

This specification provides a mechanism for an application to use an identity assertion to obtain an access token for a third-party API using Token Exchange [ RFC8693 ] and JWT Profile for OAuth 2.0 Authorization Grants [ RFC7523 ]. ¶ This note is to be removed before publishing as an RFC.¶ The latest revision of this draft can be found at https://drafts.aaronpk.com/draft-parecki-oauth-identity-assertion-authz-grant/draft-parecki-oauth-identity-assertion-authz-grant.html. Status information fo

Topics: assertion draft https identity oauth

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Latest Tech News

Posit floating point numbers: thin triangles and other tricks (2019)

Astronomers Suggest That Entire Stars Are Being Obscured by Giant "Lampshades" of Dark Matter

The 6 Best OLED TVs (2025)

Citizen science illuminates the nature of city lights

PWM flicker: Invisible light that's harming our health?

Honda joins space race with first successful reusable rocket test

Elon Says He’s Working to ‘Fix’ Grok After AI Disagrees With Him on Right-Wing Violence

This Insignia 50″ Smart TV Drops Below the Price of the Same-Size Amazon Fire TV for a Limited Time

Sensor Tower acquires Playliner to expand mobile games data

6 Best Red Light Therapy Masks and LED Devices of 2025, Reviewed

macOS Tahoe’s new Spotlight clipboard manager leaves plenty of room for powerful third-party apps

This battery floodlight camera is perfect for my dark yard (and just hit its lowest price)

Astronomers Capture the Most Colorful Image of a Galaxy Ever

Asus urges users to update Armoury Crate due to serious security flaw

Canva expands from design into analytics with acquisition of MagicBrief

Astronomers Just Solved the Mystery of the Universe's Missing Matter

Guidelines on how to be a scientific sleuth released

Surgery Still Beats Ozempic and Other GLP-1 Drugs in Real-World Weight Loss Study

Scientists achieve 1,000-fold increase in solar electricity using ultra-thin layers

AI copyright anxiety will hold back creativity

6 Tools for Tracking the Trump Administration’s Attacks on Civil Liberties

Philips’ new ambient wall light is now available

Lawyers Just Discovered Something About Meta's AI That Could Cost Zuckerberg Untold Billions of Dollars

Sitecore CMS exploit chain starts with hardcoded 'b' password

Stop Waking Up So Often to Pee in the Middle of The Night. Use These 5 Tips, Instead

Govee RGBIC Floor Lamp Hits Its Record Low Price, Create 16 Million DIY Colors With This Amazon Steal

US Streetlights Are Turning Purple

No Hello

Twelve South AirFly Pro 2 Review: Add Bluetooth to Every Flight

Identity Assertion Authorization Grant

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