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Poor man's bitemporal data system in SQLite and Clojure

news.ycombinator.com Aditya Athalye 2025-10-15 04:47:50

On trying to mash up SQLite with ideas stolen from Accountants, Clojure, Datomic, XTDB, Rama, and Local-first-ers, to satisfy Henderson's Tenth Law. Viz., to make a sufficiently complicated data system containing an ad-hoc, informally-specified, bug-ridden, slow implementation of half of a bitemporal database. Because? Because laying about on a hammock, contemplating hopelessly complected objects like Current Databases isn't just for the Rich man. Don't try this at work! The "Poor Man's Bitemp

Topics: adric data facts temporal time

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AI could dull your doctor's detection skills, study finds

zdnet.com Tiernan Ray 2025-10-22 16:23:54

DNY59/iStock/Getty Images Plus Follow ZDNET: Add us as a preferred source on Google. ZDNET's key takeaways Endoscopists who use AI may see their cancer-detection skill degrade. Prolonged exposure to AI is diminishing doctors' focus and motivation. Favorable studies of AI in medicine may be corrupted by the study design. It's important to get a colonoscopy, especially past a certain age, as colorectal cancer is the second-most common cancer in the world after breast cancer. It's also the mo

Topics: adr ai budzyn colonoscopies exposure

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How to make things slower so they go faster

news.ycombinator.com Unknown 2025-10-28 20:10:10

Synchronized demand is the moment a large cohort of clients acts almost together. In a service with capacity $\mu$ requests per second and background load $\lambda_0$, the usable headroom is $H = \mu - \lambda_0 > 0$. When $M$ clients align—after a cache expiry, at a cron boundary, or as a service returns from an outage—the bucketed arrival rate can exceed $H$ by large factors. Queues form, timeouts propagate, retries synchronize, and a minor disturbance becomes a major incident. The task is to

Topics: delay headroom rate time varepsilon

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How to Make Things Slower So They Go Faster

news.ycombinator.com Unknown 2025-10-29 21:10:10

Synchronized demand is the moment a large cohort of clients acts almost together. In a service with capacity $\mu$ requests per second and background load $\lambda_0$, the usable headroom is $H = \mu - \lambda_0 > 0$. When $M$ clients align—after a cache expiry, at a cron boundary, or as a service returns from an outage—the bucketed arrival rate can exceed $H$ by large factors. Queues form, timeouts propagate, retries synchronize, and a minor disturbance becomes a major incident. The task is to

Topics: delay headroom rate time varepsilon

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They Might Be Making the Perfect ‘Star Trek: Voyager’ Game

gizmodo.com James Whitbrook 2025-11-06 22:45:19

For as long as Star Trek: Voyager has been around, there has been much debate about if Captain Janeway made the right decisions navigating her crew’s journey home across years of travel from an unexplored corner of the galaxy with little to no support from Starfleet. Should she have killed Tuvix to save the lives of two crewmembers? Should she have been hyperevolved into an amphibian and had sex with one of her senior, also-currently-a-hyperevolved-amphibian officers? Should she have deleted tha

Topics: quadrant star trek unknown voyager

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I pried open a cheap 600W charger to test its build, and found 'goo' inside

zdnet.com Adrian Kingsley-Hughes 2025-11-22 04:45:15

It's easy to silkscreen 600W on the product, but can the product live up to the hype? Adrian Kingsley-Hughes/ZDNET I test dozens of chargers every year. Some are excellent, while others fall short. Here on ZDNET, I only feature the cream of the crop -- the best of the best. However, I occasionally receive requests from readers asking for my thoughts or opinions on specific products. Lately, one product that's been generating a lot of buzz is this 600W GaN charger. Also: This wall charger repl

Topics: 600w adrian charger kingsley zdnet

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AMD Ryzen Threadripper 9980X and 9970X Review

techspot.com Steven Walton 2025-12-16 16:08:00

AMD's latest Ryzen Threadripper 9000 series arrives with a familiar formula: massive core counts, eye-watering specs, and price tags to match. Built on the Zen 5 microarchitecture, these chips pack up to 64 cores and 128 threads, along with 80 lanes of PCIe 5.0 connectivity. As with previous generations, the lineup is split in two: a high-end desktop (HEDT) range, simply called Threadripper 9000, and a workstation-class series known as Threadripper Pro 9000WX. Our focus here is on the HEDT chi

Topics: 9980x core ghz pro threadripper

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AMD Ryzen Threadripper 9980X and 9970X Review: Zen 5 to the Extreme

techspot.com Steven Walton 2025-12-16 16:08:00

AMD's latest Ryzen Threadripper 9000 series arrives with a familiar formula: massive core counts, eye-watering specs, and price tags to match. Built on the Zen 5 microarchitecture, these chips pack up to 64 cores and 128 threads, along with 80 lanes of PCIe 5.0 connectivity. As with previous generations, the lineup is split in two: a high-end desktop (HEDT) range, simply called Threadripper 9000, and a workstation-class series known as Threadripper Pro 9000WX. Our focus here is on the HEDT chi

Topics: 9980x core ghz pro threadripper

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Quadratic forms beyond arithmetic

news.ycombinator.com Unknown 2026-01-02 14:59:21

Quadratic Forms Beyond Arithmetic Alexander Merkurjev Raman Parimala Communicated by Notices Associate Editor Han-Bom Moon 1 . Introduction The concept of quadratic forms can be traced back to ancient civilizations such as the Babylonians and Greeks. The Greeks, particularly Euclid in his famous work Elements, presented geometric methods for solving quadratic equations. The Greeks’ focus on geometry and their methods continued to influence mathematicians for centuries. Rules for quadratic equat

Topics: doi form forms math quadratic

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Quadratic Forms Beyond Arithmetic

news.ycombinator.com Unknown 2026-01-03 02:59:21

Quadratic Forms Beyond Arithmetic Alexander Merkurjev Raman Parimala Communicated by Notices Associate Editor Han-Bom Moon 1 . Introduction The concept of quadratic forms can be traced back to ancient civilizations such as the Babylonians and Greeks. The Greeks, particularly Euclid in his famous work Elements, presented geometric methods for solving quadratic equations. The Greeks’ focus on geometry and their methods continued to influence mathematicians for centuries. Rules for quadratic equat

Topics: doi form forms math quadratic

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Hadrian raises $260M to build out automated factories for space and defense parts

techcrunch.com Aria Alamalhodaei 2026-01-11 06:16:15

Investors are continuing to rally behind the call to reindustrialize American industry, this time by building out a $260 million war chest for automated manufacturing startup Hadrian to scale its factory footprint and make even more machine parts. Hadrian’s aim is to modernize American manufacturing by leveraging advanced automation to deliver mass-produced parts for aerospace and defense companies at a fraction of the time. It’s a huge change to the status quo: a manufacturing industry that’s

Topics: capital disrupt factory hadrian new

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Defense manufacturing startup Hadrian closes $260 million funding round led by Peter Thiel's Founders Fund

cnbc.com Samantha Subin 2026-01-11 11:20:40

Defense manufacturing startup Hadrian on Thursday announced the closing of $260 million Series C funding round led by Peter Thiel's Founders Fund and Lux Capital. The machine parts company said it will use the funding to build a new 270,000 square foot factory in Mesa, Arizona, and expand its Torrance, California, location as it looks to beef up its shipbuilding and naval defense capabilities. "What we really need in this country is this quantum leap above China's manufacturing model," said CE

Topics: defense funding hadrian led said

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AMD’s new 96-core Threadripper CPU will set you back $11,699

theverge.com Tom Warren 2026-01-11 21:10:59

is a senior editor and author of Notepad , who has been covering all things Microsoft, PC, and tech for over 20 years. AMD’s latest Zen 5-based Ryzen Threadripper Pro 9000 WX-Series of CPUs go on sale later this month, and the top option will be priced at $11,699. The 9000 WX-Series chips are designed for workstations, with the $11,699 Threadripper Pro 9995WX shipping on July 23rd with 96 cores and 192 threads. Dell, HP, Lenovo, and Supermicro will all start selling high-end workstations with

Topics: 9000 amd pro series threadripper

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"Awkward": Sacked Twitter CEO's Son Is Still Showing Up for Work

futurism.com Unknown 2026-01-25 02:27:49

On Tuesday, Linda Yaccarino suddenly stepped down as CEO of X, Elon Musk's social media site that was once known to many as Twitter, after two years of loyal service at the company. But guess who still showed up to work the next day? According to reporting by the New York Times: her nepo-hire of a son, Matt Madrazo. "So that's awkward," Madrazo said to colleagues after arriving at X's New York office, per the NYT. The progeny outlasts the progenitor. Yaccarino hired Madrazo in 2023 to sell po

Topics: grok madrazo musk new posts

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This overlooked phone accessory gave me a greater sense of security - and it's not a case

zdnet.com Adrian Kingsley-Hughes 2026-03-04 11:36:00

My tether tag set up on my iPhone. Adrian Kingsley-Hughes/ZDNET You might have heard of tether tags. These little tags offer a way to prevent phone snatching theft, a crime that's on the increase. The idea is you fit the little T-shaped plastic or fabric tag between the smartphone and the case it's in, clip a wrist lanyard to it, and bingo, no more theft. I first saw these on social media -- I remember there being quite a bit of hype about them -- and then I later bought one from a UK company

Topics: adrian metal tag tags zdnet

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AMD claims Ryzen Threadripper 9000 is up to 145% faster than Intel Xeon

techspot.com Kishalaya Kundu 2026-03-09 02:06:00

The big picture: AMD announced its Ryzen Threadripper 9000-series "Shimada Peak" processors at Computex but didn't provide any benchmarks to compare them against Intel's latest Xeon CPUs. This week, the company finally released official benchmarks for the new chips, claiming they are up to 145 percent faster than their Intel counterparts. According to AMD, the Threadripper 9980X HEDT processor is up to 108 percent faster than the Xeon W9-3595X in Corona Render, up to 41 percent faster in Autode

Topics: amd faster percent pro threadripper

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Latest Tech News

Poor man's bitemporal data system in SQLite and Clojure

AI could dull your doctor's detection skills, study finds

How to make things slower so they go faster

How to Make Things Slower So They Go Faster

They Might Be Making the Perfect ‘Star Trek: Voyager’ Game

I pried open a cheap 600W charger to test its build, and found 'goo' inside

AMD Ryzen Threadripper 9980X and 9970X Review

AMD Ryzen Threadripper 9980X and 9970X Review: Zen 5 to the Extreme

Quadratic forms beyond arithmetic

Quadratic Forms Beyond Arithmetic

Hadrian raises $260M to build out automated factories for space and defense parts

Defense manufacturing startup Hadrian closes $260 million funding round led by Peter Thiel's Founders Fund

AMD’s new 96-core Threadripper CPU will set you back $11,699

"Awkward": Sacked Twitter CEO's Son Is Still Showing Up for Work

This overlooked phone accessory gave me a greater sense of security - and it's not a case

AMD claims Ryzen Threadripper 9000 is up to 145% faster than Intel Xeon

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