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Normal-order syntax-rules and proving the fix-point of call/cc

Normal-order direct-style beta-evaluator with syntax-rules, and the repeated applications of call/cc The presentation at the Workshop ``Daniel P. Friedman: A Celebration.'' December 4, 2004. Bloomington, IN Normal-order direct-style beta-evaluator with syntax-rules, and the repeated applications of call/cc Repeated applications of call/cc , formally , formally Normal-order direct-style beta-normalizer as syntax-rules Use (2) to prove (1) A few less common examples The title of the talk, i

Topics: cc cps lambda norm stack

Epson’s new Lifestudio projectors put Google TV and Bose sound in one package

Epson TL;DR Epson’s new Lifestudio lineup blends 3LCD projection, Bose audio, and built-in Google TV. Models range from the portable Pop ($679.99) to the Lifestudio Grand UST ($2,499.99) with 120-inch 4K PRO-UHD HDR10 projection. All projectors are available now with a two-year warranty, and accessories like stands and a karaoke mic are available to add on. Epson’s new Lifestudio line of portable projectors makes a compelling pitch. The series blends Epson’s latest 3LCD projection tech with

T-Mobile's T-Satellite Service Now Works With These iPhone and Android Apps

This summer, T-Mobile launched its T-Satellite service, which allows you to send text messages and contact emergency services outside cellular coverage areas. The company promised that other apps would be able to work with data on the Starlink network starting in October. Fall has come early. It's only September, and several apps on iOS and Android already support T-Satellite data. With the release of iOS 26, Apple joins Google in offering compatibility with a host of apps -- such as mapping,

Viking survival sim Valheim will finally come to the PS5 in 2026

The hit survival sim Valheim will be released for the PS5 in 2026 , ending years of speculation. The year is all we got, as developer Iron Gate AB didn't announce an actual release date. Still, it's better than nothing. We do know that the PS5 version will feature full crossplay with all other platforms, so that's good. Piktiv, a company that regularly assists Iron Gate with Valheim stuff, is working on the port so the main development team can focus its efforts on updates and DLC drops. To tha

GNOME 49 arrives this week, and it's packed with features and polish you'll love

Jack Wallen/ZDNET Follow ZDNET: Add us as a preferred source on Google. ZDNET's key takeaways GNOME 49 will be available on Sept. 17. The latest release switches out some default apps. This new GNOME adds just the right amount of polish. GNOME is a Linux desktop environment that you either love or hate. I've used GNOME and GNOME-based desktops for years and have always fallen on the side of "love. " With each new release, I always find a feature or two (or a bit of extra polish) that makes

Epson partnered with Bose for the speakers on its new projectors

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. Posts from this author will be added to your daily email digest and your homepage feed. Epson announced five new projectors today as part of a new Lifestudio brand. The lineup includes portable projectors and an ultra-short throw model designed to be part of a permanent home theater setup, with a mix of 4K and 1080P options. All five models feat

The iPhone 17 just made USB-C charging even more of a nightmare

USB-C is an unfixable mess, that I’m convinced of, but a small part of me saw light at the end of the tunnel — that was until Apple launched the iPhone 17 series. With Apple’s latest phones, it’s now even harder for consumers to find the perfect plug to optimally fast-charge all their gadgets at once. Allow me to explain why. The good news, as it were, is that the iPhone 17 series claims “up to 50% charge in 20 minutes” with Apple’s new 40W Dynamic Power Adapter. That’s still not super fast, bu

Topics: apple avs power pps usb

Epson Unleashes Lifestudio Projectors with New 3LCD Light Engine

Epson has launched a series of 4K and 1080p projectors called Lifestudio, which range in price between $680 and $2,500, and feature a new 3LCD light engine. These lifestyle projectors are mostly for occasional movie nights and gaming, with the exception of the top-of-the-line model which is an ultra-short throw projector designed for more permanent placement. The models has onboard sound by Bose while the Flex Plus has the ability to run off a battery bank for extra portability. Lifestudio Gr

Millions turn to AI chatbots for spiritual guidance and confession

On Sunday, The New York Times reported that tens of millions of people are confessing secrets to AI chatbots trained on religious texts, with apps like Bible Chat reaching over 30 million downloads and Catholic app Hallow briefly topping Netflix, Instagram, and TikTok in Apple's App Store. In China, people are using DeepSeek to try to decode their fortunes. In her report, Lauren Jackson examined "faith tech" apps that cost users up to $70 annually, with some platforms claiming to channel divine

Lenovo Coupon Codes and Deals: $800+ Off

Lenovo is currently the biggest PC and laptop company in the world, and they just so happen to make some of our favorite laptops and PC peripherals. In fact, our list of the Best Laptops you can buy include a number of Lenovo devices that we’ve tested and fully recommend, ranging from high-end premium laptops to options for budget-minded shoppers. If you are looking to save a few bucks while shopping for a new Lenovo product, here are the Lenovo coupon codes and special offers you need to know a

China says NVIDIA's Mellanox acquisition violated antitrust law

A regulator has accused NVIDIA of violating China's antitrust laws over its acquisition of chipmaker Mellanox. In its preliminary findings of an investigation it commenced in December , the State Administration for Market Regulation (SAMR) claimed that the company breached both national regulations and the conditional terms China outlined when it rubberstamped the $6.9 billion takeover. The SAMR hasn't announced any penalties yet, as the investigation will continue. The SAMR is said to have det

The 9 most sought-after startups from YC Demo Day

Y Combinator hosted its Summer 2025 Demo Day last week, showcasing the latest batch of over 160 startups. As with recent batches, the majority of startups presented AI-centric solutions. However, a clear evolution was evident. Instead of “AI-powered” products, many companies are now building AI agents or the infrastructure and tools needed to develop them. For instance, this batch had a flurry of voice AI solutions and new businesses focused on helping others monetize the “AI economy” with ads

Downloading iOS 26? Do these 6 things on your iPhone first (and thank me later)

Maria Diaz/ZDNET Apple's latest mobile operating system, iOS 26 -- yes, if you've not been keeping up, that's what will come after iOS 18 -- is finally here, and it's being pushed out to hundreds of millions of compatible iPhones worldwide. For the most part, the vast majority of these upgrades will be smooth and painless. Also: Every iPhone that can be updated to iOS 26 (and when you can install it) Maybe I'm being overly cautious here, but, as someone who's experienced a painful upgrade, I

Topics: 26 apps ios iphone update

Microsoft’s Office apps now have free Copilot Chat features

is a senior editor and author of Notepad , who has been covering all things Microsoft, PC, and tech for over 20 years. Posts from this author will be added to your daily email digest and your homepage feed. Microsoft is adding the free Microsoft 365 Copilot Chat and agents to Office apps for all Microsoft 365 business users today. Word, Excel, PowerPoint, Outlook, and OneNote are all being updated with a Copilot Chat sidebar that will help draft documents, analyze spreadsheets, and more withou

China says Nvidia violated antitrust regulations

Trade tensions between China and the U.S. regarding semiconductors just got even more strained. On Monday, China’s State Administration for Market Regulation ruled that semiconductor giant Nvidia was in violation of the country’s antitrust regulations, as first reported by Bloomberg. The ruling was in reference to Nvidia’s 2020 acquisition of Mellanox Technologies, a computer networking supplier, for $7 billion. An Nvidia spokesperson supplied the following statement, “We comply with the law i

Scientists Tested What's Really in "Psilocybin" Chocolate and Found Something Alarming

Image by Getty / Futurism Mental Health If you're a coward and don't want to munch on awful-tasting shrooms to go on a psychedelic odyssey, you can buy delicious edibles infused with their active ingredient instead: psilocybin. But maybe you shouldn't, because new research suggests that you might be getting ripped off taking these — or even putting your health at risk. After testing 12 edible "magic mushroom" products sold in Portland, Oregon, Richard van Breemen and his colleagues found abso

Launch HN: Trigger.dev (YC W23) – Open-source platform to build reliable AI apps

Hi HN, I’m Eric, CTO at Trigger.dev ( https://trigger.dev ). We’re a developer platform for building and running AI agents and workflows, open-source under the Apache 2.0 license ( https://github.com/triggerdotdev/trigger.dev ). We provide everything needed to create production-grade agents in your codebase and deploy, run, monitor, and debug them. You can use just our primitives or combine with tools like Mastra, LangChain and Vercel AI SDK. You can self-host or use our cloud, where we take ca

Topics: ai dev https self trigger

Epic Games versus Apple Australia ruling published – Apple calls it harmful

We last month learned that Epic Games had won its antitrust case against Apple in Australia, with the court ruling that the iPhone maker must permit side-loading and third-party payments. The full reasoning for that decision has now been published – all 900 pages of it – and Apple has accused the judge of underestimating the privacy and security risks to users … The case hinged on the usual question: What defines the dominance of the App Store? Apple argues that it does not have a monopoly, a

Your Pixel Watch could soon offer unprecedented control over your Pixel phone

Rita El Khoury / Android Authority TL;DR Google is testing new functionality as part of the Pixel Watch Unlock feature, which allows you to unlock your Pixel phone using the Watch. The upgrade could enable you to not only unlock your Pixel phone using a Pixel Watch but also launch a specific section of the app. The feature is intended to work with a set of specific “Authorized” apps that you will be able to manage from the phone’s Settings. The Watch Unlock feature offers a convenient approa

First calls and texts, now Pixels could detect scams from chat apps (APK teardown)

C. Scott Brown / Android Authority TL;DR An Android Authority teardown has revealed that Google’s Scam Detection feature is coming to chat apps. The feature will display scam detection alerts in chat app notifications. It’s possible that apps like WhatsApp, Signal, Instagram, and Twitter could support this functionality. Google introduced Scam Detection functionality to Pixel phones last year, which alerts you if you’re on a phone call with a suspected scammer. The company has also brought t

AMD Turin PSP binaries analysis from open-source firmware perspective

Introduction In the previous post, we showed coreboot running on Gigabyte MZ33-AR1 with Turin CPU, the current, newest family of AMD server processors. However, we faced various obstacles and problems. Despite AMD publishing a set of blobs required for the Turin system initialization, they turned out to be not enough to release the CPU from reset by PSP. We were forced to do a workaround by injecting coreboot into the vendor firmware image and flashing it back. The whole process is far from ide

Topics: 0x0 amd blobs image psp

Eye drops could replace glasses or surgery for longsightedness, study says

Doctors have developed special eye drops for people with longsightedness that could replace the need for reading glasses or surgery. Hundreds of millions of people worldwide have presbyopia, which is when the eyes find it difficult to focus on objects and text up close. Glasses or surgery can usually resolve the problem but many find wearing spectacles inconvenient and having an operation is not an option for everyone. Now experts say the solution could be as simple as using eye drops twice a

Jeffrey Epstein’s Yahoo Inbox Revealed

Right-wing internet personality and Turning Point USA cofounder Charlie Kirk was shot and killed on Wednesday during a speaking engagement at Utah Valley University in Orem, Utah. After a chaotic 24-hour manhunt, the FBI named 22-year-old Utah resident Tyler Robinson as a suspect in the murder. As polarization and political violence continues to increase in the US, a new platform from the Public Service Alliance is offering tools like data-removal services and threat monitoring to public servan