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Nuclear Fusion May Still Be Decades Away, but the Latest Breakthrough Could Speed Up Its Development
Nuclear fusion holds huge promise as a source of clean, abundant energy that could power the world. Now, fusion researchers at a national laboratory in the US have achieved something physicists have been working towards for decades, a process known as “ignition”.
This step involves getting more energy out from fusion reactions than is put in by a laser.
But just how close are we to producing energy from fusion that can power people’s homes? While the ignition is only a proof of principle and the first step in a very long process, other developments are also in the works and together they could spark renewed enthusiasm for making fusion a practical reality.
First, it’s important to recognise that the latest result is indeed a real milestone.
The researchers at the National Ignition Facility (NIF) in California fired the world’s biggest laser at a capsule filled with hydrogen fuel, causing it to implode and starting fusion reactions that mimic what happens in the Sun.
The fusion energy released by the implosion was more than that put in by the laser, a massive achievement given that, just a few years ago, the NIF laser could only get out about a thousandth of the energy it put in.
However, around 10,000 times more energy had to be put into the laser than it produced in light energy.
It can only be run once a day. And every target is so exquisitely designed that each one costs thousands of dollars.
To produce a reactor for a working power station, you would need a laser that produced light energy at much greater efficiency (a few tens of percent) and shot targets successfully at ten times per second, with each target costing a few pence or so.
In addition, each laser shot would need to produce many times – perhaps 100 times – more energy out than was put in.
Very little research has actually been done on fusion “reactors”, where neutrons from the reactions would help drive a steam turbine to produce electricity. But there are other reasons for hope.
Firstly, while NIF has taken more than a decade to achieve ignition, during the same period, scientists have independently developed new lasers.
These use electronic devices called diodes to transfer energy to the laser and are very, very efficient, converting a good fraction of the electricity from the grid into laser light.
Prototype versions of such lasers have been proven to work at the rates of 10 times per second, which would be required for them to be useful in fusion.
These lasers are not yet of the size needed for fusion, but the technology is proven, and the UK leads in this type of research.
Also, the approach to fusion used by the scientists at NIF has some well-known, inherent inefficiencies, and there are several other ideas that could be much more effective.
Nobody is absolutely certain that these other ideas would work, as they have their own unique problems, and have never been tried at scale.
To do so would require hundreds of millions of dollars of investment for each of them with no guarantee of success (otherwise it would not be research).
However, there is now a wind of change blowing: the private sector.
Various funds with a very long-term outlook have started to invest in new start-up firms that are touting fusion as a commercially viable source of energy.
Given that it was private industry that has revolutionised the electric car market (and the rocket industry), maybe that sector could also give fusion the “kick” it requires.
Private firms can work a lot faster than governments, and pivot quickly to adopt new ideas when required.
Estimates of the total private funding in the sector now stand in excess of $2 billion (roughly Rs. 16,500 crore), peanuts compared with the $2 trillion (roughly Rs. 165 lakh crore) in revenue produced by the oil and gas industry each year.
There is still a lot of room in the marketplace for the high-risk, high-pay-off players.
The latest results show that the basic science works: the laws of physics do not prevent us from achieving the goal of unlimited clean energy from fusion.
The problems are technical and economic. While fusion may be too far off to solve matters on the timescale of a decade or two, the latest advance will at least bolster enthusiasm about solving one of humanity’s grand challenges.
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YouTube will roll out a slew of artificial-intelligence-powered features for creators, the latest effort from parent company Alphabet to incorporate generative AI — technology that can create and synthesize text, images, music and other media given simple prompts — into its most important products and services.
Among the new products YouTube announced Thursday is a tool called Dream Screen that uses generative AI to add video or image backgrounds to short-form videos, which the company calls Shorts. It also announced new AI-enabled production tools to help with editing both short- and long-form videos on its platform.
“We’re unveiling a suite of products and features that will enable people to push the bounds of creative expression,” Toni Reid, YouTube’s vice president for community products, said in a blog post timed to the announcement Thursday. The Google-owned video platform first announced that it was developing the tools in March.
Google has been under pressure to show results and practical applications for its generative AI products. Some critics have been wary the company, which has long been seen as a leader in artificial intelligence, was falling behind upstarts like OpenAI or rival Microsoft, and that the products Google was rolling out weren’t yet ready for public consumption. OpenAI’s ChatGPT and a new Bing chatbot from Microsoft — which has invested $13 billion (nearly Rs. 1,08,100 crore) in OpenAI since 2019 — have been wildly popular and gained mainstream favour.
Over the past few months, Google launched its own ChatGPT competitor, Bard, and released a steady flow of updates to the product. It’s also incorporated experimental generative AI features into its most important services, including its flagship search engine, in what the company calls its experimental “search generative experience.” The product generates detailed summaries based on information it’s ingested from the internet and other digital sources in response to search queries.
The announcement of the new features also comes as YouTube is locked in fierce competition with ByteDance‘s TikTok and Meta Platforms‘s Instagram Reels to gain more share of the vertical, short-form video market. YouTube said it now sees more than 70 billion daily views on Shorts, and the new generative AI tools appear to be aimed at attracting even more users and creators and gaining a competitive edge over its rivals.
The company also announced YouTube Create, a mobile app aimed at helping the platform’s creators make video production work easier. The app includes AI-enabled features like editing and trimming, automatic captioning, voiceover capabilities and access to a library of filters and royalty-free music. The app is currently in beta on Android in “select markets,” the company said, and will be free of charge.
Beyond creation, YouTube said it would also provide creators with more tools to get AI-powered insights, help with automatic dubbing of videos and assist with finding music and soundtracks for videos.
© 2023 Bloomberg LP
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WhatsApp has begun rolling out support for a new feature that will allow you to log in to your account using the biometric authentication mechanism on your smartphone. The messaging service will soon allow you to create a passkey — a kind of login credential that eliminates the need to use or remember a password — on your device and use it to securely log in to apps and services using the facial recognition or fingerprint scanner on your device.
Feature tracker WABetaInfo spotted the new passkey feature on WhatsApp beta for Android 2.23.20.4 on Tuesday, that is rolling out to beta users. However, not all users who have updated to the latest beta release will have access to the feature, which is reportedly rolling out to a “limited number of beta testers”. Gadgets 360 was unable to access the feature on two different Android smartphones that are both enrolled in the beta program.
The new Passkeys feature on WhatsApp
Photo Credit: WABetaInfo
The new passkey feature is described as a “simple way to sign in safely” to WhatsApp in a screenshot shared by the feature tracker. This suggests that it could be used to help sign in to other devices via secure authentication on your primary device.
Authenticating using passkeys isn’t a novel concept and the technology is slowly gaining traction online— Google already allows you to log in to a new device by using fingerprint-based biometric authentication for passkeys in place of a password. These passkeys are securely stored on your device and used when biometric authentication is provided.
The screenshot posted by WABetaInfo also states that WhatsApp will store the passkey in the device’s password manager — for most users, that would be the device’s default password store that is handled by Google with autofill support. The feature is also expected to make its way to iOS, where it is likely to be stored in the iOS Keychain.
It is currently unclear whether WhatsApp will also support storing passkeys in third-party apps like Bitwarden, 1Password, or Dashlane. We can expect to learn more about how the feature works when it is rolled out to more users in the beta program and the feature is expected to arrive on all smartphones on the stable channel in the future.
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Britain urged Meta not to roll out end-to-end encryption on Instagram and Facebook Messenger without safety measures to protect children from sexual abuse after the Online Safety Bill was passed by parliament.
Meta, which already encrypts messages on WhatsApp, plans to implement end-to-end encryption across Messenger and Instagram direct messages, saying the technology re-enforced safety and security.
Britain’s Home Secretary Suella Braverman said she supported strong encryption for online users but it could not come at the expense of children’s safety.
“Meta has failed to provide assurances that they will keep their platforms safe from sickening abusers,” she said. “They must develop appropriate safeguards to sit alongside their plans for end-to-end encryption.”
A Meta spokesperson said: “The overwhelming majority of Brits already rely on apps that use encryption to keep them safe from hackers, fraudsters and criminals.
“We don’t think people want us reading their private messages so have spent the last five years developing robust safety measures to prevent, detect and combat abuse while maintaining online security.”
It said it would update on Wednesday on the measures it was taking, such as restricting people over 19 from messaging teens who do not follow them and using technology to identify and take action against malicious behaviour.
“As we roll out end-to-end encryption, we expect to continue providing more reports to law enforcement than our peers due to our industry leading work on keeping people safe,” the spokesperson said.
Social media platforms will face tougher requirements to protect children from accessing harmful content when the Online Safety Bill passed by Parliament on Tuesday becomes law.
End-to-end encryption is a bone of contention between companies and the government in the new law.
Messaging platforms led by WhatsApp oppose a provision that they say could force them to break end-to-end encryption.
The government, however, has said the bill does not ban the technology, but instead, it requires companies to take action to stop child abuse and as a last resort develop technology to scan encrypted messages.
Tech companies have said scanning messages and end-to-end encryption are fundamentally incompatible.
© Thomson Reuters 2023
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)
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