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Sep 26, 2023

Two Black Holes Masquerading as One

Posted by in categories: cosmology, information science, quantum physics

Black holes may be less unique than previously thought, as the expansion due to a cosmological constant can hold apart a pair of holes and allow them to mimic a single black hole.

Black holes are astonishing objects that can pack the mass of Earth into a space the size of a pea. A remarkable attribute is their stunning simplicity, which is encapsulated in the celebrated uniqueness theorems [1]. Briefly stated, these theorems say that there is only one solution to Einstein’s equations of general relativity for a fully collapsed (nonevolving) system having fixed mass and angular momentum [2]. The implication is that all black holes that have settled down to equilibrium with the same mass and rotation are precisely the same: their entire behavior described by a single equation—the so-called Kerr solution—filling only a few lines of paper!

But there is a catch. The uniqueness theorems make a number of assumptions, the key one being that the space around the black hole is “empty”—in other words, there is no energy that might influence the black hole. Such energy can arise from fields, for example, those of the standard model, or from a “cosmological constant,” which is a form of dark energy that might be behind the accelerated expansion of our Universe today. In a fascinating study, Óscar Dias from the University of Southampton, UK, and colleagues demonstrate that uniqueness is violated in the presence of a positive cosmological constant [3]. Specifically, they show that a pair of black holes whose mutual attraction is balanced by the cosmic expansion would look the same to a distant observer as a single isolated black hole. The results may lead to a rethinking of how simple black holes really are.

Sep 26, 2023

Now you can chat with ChatGPT using your voice

Posted by in category: robotics/AI

The new feature is part of a round of updates for OpenAI’s app, including the ability to answer questions about images.

First, ChatGPT now has a voice. Choose from one of five lifelike synthetic voices and you can have a conversation with the chatbot as if you were making a call, getting responses to your spoken questions in real time.

ChatGPT also now answers questions about images. OpenAI teased this feature in March with its reveal of GPT-4 (the model that powers ChatGPT), but it has not been available to the wider public before. This means that you can now upload images to the app and quiz it about what they show.

Sep 26, 2023

Getty Images promises its new AI contains no copyrighted art

Posted by in categories: internet, law, robotics/AI

And it will pay legal fees if its customers end up in any lawsuits about it.

Getty Images is so confident its new generative AI model is free of copyrighted content that it will cover any potential intellectual-property disputes for its customers.

The generative AI system, announced today, was built by Nvidia and is trained solely on images in Getty’s image library. It does not include logos or images that have been scraped off the internet without consent.

Sep 26, 2023

These new tools could make AI vision systems less biased

Posted by in category: robotics/AI

Two new papers from Sony and Meta describe novel methods to make bias detection fairer.

Computer vision systems are everywhere. They help classify and tag images on social media feeds, detect objects and faces in pictures and videos, and highlight relevant elements of an image. However, they are riddled with biases, and they’re less accurate when the images show Black or brown people and women. And there’s another problem: the current ways researchers find biases in these systems are themselves.

Two new papers by researchers at Sony and Meta propose ways to measure biases… More.

Sep 26, 2023

An inside look at Congress’s first AI regulation forum

Posted by in categories: government, robotics/AI

Researcher Inioluwa Deborah Raji says tech CEOs focused on big claims of what AI could do, but she was there to offer a reality check.

Recently, I wrote a quick guide about what we might expect at Congress’s first AI Insight Forum. Well, now that meeting has happened, and we have some important information about what was discussed behind closed doors in the tech-celeb-studded confab.

First, some context. The AI Insight Forums were announced a few months ago by Senate Majority Leader Chuck Schumer as part of his “SAFE Innovation” initiative, which is really a set of principles for AI legislation in the United States. The invite list was heavily skewed toward Big Tech execs, including CEOs of AI… More.

Sep 26, 2023

Telegram starts to look like a super app, echoing WeChat

Posted by in categories: blockchains, space

Telegram, the popular messenger with 800 million monthly active users worldwide, is inching closer to adopting an ecosystem strategy that is reminiscent of WeChat’s super app approach. Certain aspects of the ecosystem will be decentralized with help from two heavyweights: Telegram’s crypto partner TON Foundation and WeChat’s owner Tencent.

Telegram has been working on a platform where third-party developers, from games to restaurants, can build mini apps to interact with users. In Telegram’s own words: “Developers can use JavaScript to create infinitely flexible interfaces that can be launched right inside Telegram — and can completely replace any website.”

To build out this super app platform, Telegram relies on a network of infrastructure partners both from the established tech world and the crypto space. Among them is The Open Network (TON) Foundation, which lays the blockchain groundwork for Telegram but operates as an independent organization.

Sep 26, 2023

Tungsten oxide hydrate: the future of smart windows

Posted by in categories: energy, materials

Researchers unveil a revolutionary material, tungsten oxide hydrate, enabling dynamic windows that adapt to light and temperature, boosting energy efficiency.

Dynamic windows have long been the dream of architects and engineers, promising buildings that adapt to varying light and temperature conditions.

Now, researchers from NC State University have taken a giant leap forward in this field by unveiling a revolutionary material known as tungsten oxide hydrate. This innovation could pave the way for the next generation of dynamic windows, offering building occupants the ability to switch their windows between three distinct modes: transparency, infrared light blocking, and glare control, according to a university release.

Sep 26, 2023

AtlasNEST plans to deploy drones to enhance airport security

Posted by in categories: drones, security, surveillance

The operations are based on an outdoor docking system that incorporates the firm’s AtlasPRO tricopter drones meant for surveillance.

Providing fool-proof security at airports proves to be challenging due to various logistical limitations, primarily due to its size, even though the airport security system is typically organized clearly and logically.

Continue reading “AtlasNEST plans to deploy drones to enhance airport security” »

Sep 26, 2023

China plans giant particle accelerator-powered chip factory

Posted by in categories: computing, particle physics

Chinese researchers are working on ways to develop their own semiconductor lithography process to compete with ASML.

Researchers at Tsinghua University are working to bring microchip production to China to bypass US sanctions, reports the South China Morning Post.

Continue reading “China plans giant particle accelerator-powered chip factory” »

Sep 26, 2023

Amazon invests $4 billion in Anthropic

Posted by in category: robotics/AI

Google has also said it’s invested $400 million into the AI company.

Amazon said it will invest $4 billion in Anthropic, an artificial intelligence company founded by former employees of OpenAI, a rival leading AI company. As part of the investment, Amazon will take a minority stake in Anthropic, as per a press release.

The immediate investment is $1.25 billion, with either party having the authority to trigger another $2.75 billion in funding by Amazon, reported Reuters.

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