Transistors, the building blocks of modern electronics, are typically made of silicon. Because it’s a semiconductor, this material can control the flow of electricity in a circuit. But silicon has fundamental physical limits that restrict how compact and energy-efficient a transistor can be.

MIT researchers have now replaced silicon with a magnetic semiconductor, creating a magnetic transistor that could enable smaller, faster, and more energy-efficient circuits. The material’s magnetism strongly influences its electronic behavior, leading to more efficient control of the flow of electricity. 

The team used a novel magnetic material and an optimization process that reduces the material’s defects, which boosts the transistor’s performance.

The material’s unique magnetic properties also allow for transistors with built-in memory, which would simplify circuit design and unlock new applications for high-performance electronics.

“People have known about magnets for thousands of years, but there are very limited ways to incorporate magnetism into electronics. We have shown a new way to efficiently utilize magnetism that opens up a lot of possibilities for future applications and research,” says Chung-Tao Chou, an MIT graduate student in the departments of Electrical Engineering and Computer Science (EECS) and Physics, and co-lead author of a paper on this advance.

Chou is joined on the paper by co-lead author Eugene Park, a graduate student in the Department of Materials Science and Engineering (DMSE); Julian Klein, a DMSE research scientist; Josep Ingla-Aynes, a postdoc in the MIT Plasma Science and Fusion Center; Jagadeesh S. Moodera, a senior research scientist in the Department of Physics; and senior authors Frances Ross, TDK Professor in DMSE; and Luqiao Liu, an associate professor in EECS, and a member of the Research Laboratory of Electronics; as well as others at the University of Chemistry and Technology in Prague. The paper appears today in Physical Review Letters.

Overcoming the limits

In an electronic device, silicon semiconductor transistors act like tiny light switches that turn a circuit on and off, or amplify weak signals in a communication system. They do this using a small input voltage.

But a fundamental physical limit of silicon semiconductors prevents a transistor from operating below a certain voltage, which hinders its energy efficiency.

To make more efficient electronics, researchers have spent decades working toward magnetic transistors that utilize electron spin to control the flow of electricity. Electron spin is a fundamental property that enables electrons to behave like tiny magnets.

So far, scientists have mostly been limited to using certain magnetic materials. These lack the favorable electronic properties of semiconductors, constraining device performance.

“In this work, we combine magnetism and semiconductor physics to realize useful spintronic devices,” Liu says.

The researchers replace the silicon in the surface layer of a transistor with chromium sulfur bromide, a two-dimensional material that acts as a magnetic semiconductor.

Due to the material’s structure, researchers can switch between two magnetic states very cleanly. This makes it ideal for use in a transistor that smoothly switches between “on” and “off.”

“One of the biggest challenges we faced was finding the right material. We tried many other materials that didn’t work,” Chou says.

They discovered that changing these magnetic states modifies the material’s electronic properties, enabling low-energy operation. And unlike many other 2D materials, chromium sulfur bromide remains stable in air.

To make a transistor, the researchers pattern electrodes onto a silicon substrate, then carefully align and transfer the 2D material on top. They use tape to pick up a tiny piece of material, only a few tens of nanometers thick, and place it onto the substrate.

“A lot of researchers will use solvents or glue to do the transfer, but transistors require a very clean surface. We eliminate all those risks by simplifying this step,” Chou says.

Leveraging magnetism

This lack of contamination enables their device to outperform existing magnetic transistors. Most others can only create a weak magnetic effect, changing the flow of current by a few percent or less. Their new transistor can switch or amplify the electric current by a factor of 10.

They use an external magnetic field to change the magnetic state of the material, switching the transistor using significantly less energy than would usually be required.

The material also allows them to control the magnetic states with electric current. This is important because engineers cannot apply magnetic fields to individual transistors in an electronic device. They need to control each one electrically.

The material’s magnetic properties could also enable transistors with built-in memory, simplifying the design of logic or memory circuits.

A typical memory device has a magnetic cell to store information and a transistor to read it out. Their method can combine both into one magnetic transistor.

“Now, not only are transistors turning on and off, they are also remembering information. And because we can switch the transistor with greater magnitude, the signal is much stronger so we can read out the information faster, and in a much more reliable way,” Liu says.

Building on this demonstration, the researchers plan to further study the use of electrical current to control the device. They are also working to make their method scalable so they can fabricate arrays of transistors.

This research was supported, in part, by the Semiconductor Research Corporation, the U.S. Defense Advanced Research Projects Agency (DARPA), the U.S. National Science Foundation (NSF), the U.S. Department of Energy, the U.S. Army Research Office, and the Czech Ministry of Education, Youth, and Sports. The work was partially carried out at the MIT.nano facilities.

In a voice vote earlier this week, the House of Representatives passed H.R. 6028, the “Legislative Branch Agencies Clarification Act.” The legislation is presented as a technical reorganization of some government agencies, but it’s much more than that. 

H.R. 6028 would fundamentally change the U.S. Copyright Office, and not in a good way. The bill removes the Library of Congress’ current supervisory role over the Copyright Office, transfers several powers directly to the Register of Copyrights, and makes the Register a presidential appointee, confirmed by the Senate. 

These changes would make an office that’s already hugely influential in copyright and tech policy much more political. EFF first explained why that’s a terrible idea when it came up nearly a decade ago. This bill, like the older one, weakens the few public-interest checks and balances that do exist.  We hope the Senate promptly rejects this bill. 

The Copyright Office Doesn’t Need More Politics—Or More Power

The Copyright Office's main responsibilities are administrative and advisory. It registers copyrights, maintains records, grows the Library of Congress’s collections, and provides expertise to Congress on copyright law. But over the past two decades, the Office has also become increasingly influential in copyright policy debates that affect free expression, libraries, educators, competition—and everyday internet users. Unfortunately, it has not been a neutral advocate. The office’s recent report on the role of AI severely bungled the issue of fair use, prioritizing private licensing market “solutions” over user rights. 

Going further back, the Copyright Office supported one of the most infamous anti-internet proposals of all time—the Stop Online Piracy Act (SOPA), a disastrous internet censorship proposal that sparked one of the largest online protests in history. The Office has repeatedly advanced positions that favored large entertainment-industry interests over the public interest.

The Office also plays a major role in the Digital Millennium Copyright Act (DMCA) Section 1201 rulemaking process, which determines when the public may lawfully bypass digital locks for activities such as security research, repair, preservation, or accessibility. EFF has used this process repeatedly to mitigate some of the worst harms of the DMCA. H.R. 6028 would move rulemaking authority over 1201 from the Librarian of Congress to the Register of Copyrights, further consolidating power within the Copyright Office itself.

The bill also makes the Register of Copyrights a presidential appointee confirmed by the Senate. Each administration will be pressured to pick nominees aligned with their own policy preferences, and the powerful copyright owning industries will invest even more heavily in lobbying to get their way, and influence the selection. This position should be focused on administrative ability and actual expertise, not lobbying and politics. 

The Copyright Office Should Stay Connected To The Library of Congress

H.R. 6028 would do more than change who appoints the Register of Copyrights. It would sever the Copyright Office from Library of Congress supervision and transfer many Librarian powers directly to the Register. 

The supervisory relationship exists for good reason, as the nation’s libraries have pointed out for years. The Library, while far from perfect, at least has the mission of preserving and providing access to knowledge. That should be an important public-interest counterweight in copyright debates. Congress has not explained how weakening the ties between the Library and the Copyright Office would serve the public better, or even seriously inquired about it. 

This Bill Was Rushed Through

Back in March, EFF joined Public Knowledge, the Center for Democracy and Technology, library organizations and tech groups, urging Congress not to fast-track this legislation. We told them changes to the Copyright Office will have major consequences for the “speech rights, educational opportunities, and creative freedoms of all Americans.” 

Yet Congress moved forward without any hearings on the bill, and without meaningful examination. H.R. 6028 creates a years-long separation of the Copyright Office from the Library of Congress, transfers significant legal authority, and restructures the appointment process for the nation’s top copyright official. Changes like that deserve hearings, debate, and public scrutiny. H.R. 6028 got none of that. 

The Senate Should Stop This Bill

Copyright law exists to serve the public and “promote the progress” of science and learning. The institutions that administer copyright law should do the same. 

H.R. 6028 would move the Copyright Office further away from that goal. Congress should be strengthening public-interest oversight of copyright policymaking, not looking for ways to concentrate more authority in a single presidentially appointed official. 

The Senate should reject H.R. 6028. The Copyright Office should serve the public—not presidential administrations, and not industry lobbyists. 

For months now, Congress has been kicking the ball down the road—temporarily postponing the expiration of the mass surveillance authority Section 702 of FISA in hopes that some consensus could be reached. Now, with the deadline looming, the stakes have never been higher. Nearly every time the statute has come up for renewal, the people demanding privacy and civil liberties have had to compromise, but with current negotiations seemingly at  an impasse, it’s time for surveillance maximalist lawmakers to come to the table. 

We say to the Intelligence Community crowd: Section 702 should require a warrant before the Federal Bureau of Investigation can look at digital communications collected from Americans. If not, we should let the whole thing expire.

This is a serious proposition. The intelligence community can keep a useful national security surveillance tool if and only if they make FBI agents get a warrant signed by a judge before they sift through and read out private communications. A warrant requirement is not the only demand EFF has been making for changing Section 702, but it is the most important reform and it should happen before there is any more reauthorization of the policy. 

For too long, the FBI has been able to piggyback on a major national security tool as an unconstitutional backdoor way of reading Americans’ communications. 702 collects communications going to, from, or between people in other countries—including when they are contacted by people in the United States. Mass surveillance is just that—mass. It’s lacking any of the individualized suspicion that our legal system is based on. 

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TELL congress: 702 Needs Reform

So, what’s been happening?

On one side are surveillance hawks and intelligence community-devotees who think the mass surveillance of Americans is an acceptable, even valuable, product of this authority. This bipartisan coalition of privacy deniers think that 702 should be extended without any change, and they seem to be willing to let the authority expire rather than compromise with the lawmakers and public that are demanding common-sense reforms. They’ve been given a number of chances to pass bills that would implement some key incremental reforms, but those opportunities have not moved the needle. 

On the other side of the debate is a bipartisan coalition of people who understand that this authority can no longer operate as is. Section 702 is rife with problems, loopholes, and compliance issues that need fixing. The National Security Agency collects full conversations being conducted by and with overseas targets—including conversations by and with Americans in the U.S.—and stores them in massive databases. The NSA then allows other agencies, specifically the FBI, to access untold amounts of that information. In turn, the FBI takes a “finders keepers” approach to this data: they reason that since it's already collected under one law, it’s OK for them to see it. If the FBI wanted to get that data on their own, it would require them to get a warrant signed by a judge certifying that there is probable cause. Instead, under current practice, the FBI can query and even read the U.S. side of that communication without a warrant. What’s more, victims of this surveillance won’t know and have very few ways of finding out that their communications have been surveilled.

Complicating this matter more is that the Trump administration has announced Bill Pulte as the new Director of National Intelligence, whose job it will be to oversee and direct U.S. intelligence agencies. This is particularly concerning because of Pulte’s history of using private information held by the government as a political weapon. In his FHFA role, he has accused several of the President’s political foes and targets—including New York State Attorney General Letitia James, U.S. Sen. Adam Schiff, D-Calif., and Federal Reserve governor Lisa Cook—of mortgage fraud based on private data held by his agency. Because of his looming appointment, many Democrats have vowed not to reauthorize Section 702 unless he is removed from the position. They shouldn’t stop there—they should use that leverage to demand a warrant requirement. The integrity of the people in charge of a program should not be the only thing that stands between Americans and violations of their civil liberties. 

What happens if 702 expires? 

As the New York Times reports, “The law, however, has a built-in safety net for a temporary lapse that allows the surveillance program to endure until annual certifications issued by the nation’s intelligence court expire, though such a scenario could invite legal challenges. The court recertified the program in March, meaning the N.S.A. could continue to operate the program through March 2027 even if the statute were to expire.” 

If Section 702 does stay expired past March 2027, the United States government will likely revert to using other programs and authorities to justify the surveillance of overseas national security targets, namely 12333, a shadowy executive order from the 1980s that gives the U.S. government nearly unlimited power to spy on people overseas.  Even if this does come to pass, standing our ground on warrant requirements and allowing Section 702 to expire  is important for several reasons. First, just because the government continues surveillance under a different authority does not mean it is legally justified in doing so—this was the lesson of the post 9/11 Presidential Surveillance Program, which was only retroactively immunized by Congress. Second, seeing how the government responds to the end of Section 702 might give us opportunities to push for transparency in other parts of information collection and better understand how the inner workings of the intelligence apparatus pivot and adapt as new legal authorities take precedence. 

Where do we go from here? 

Every few years, for almost two decades now, we’ve been fighting to reform Section 702 so that it will no longer enable the warrantless mass surveillance of Americans. A bipartisan coalition in Congress supports this goal, but the White House and Congressional leadership won’t listen. It’s past time we make at least one serious reform to a mass surveillance law that has been abused for decades. Tell your elected official: Put a warrant requirement in Section 702 or let it expire.

Take action

TELL congress: 702 Needs Reform

Enshittification isn't just a sweary word to describe the accelerating decay of the online platforms, apps, and services that we rely on.  

It's a framework for understanding the structural incentives that make tech companies enemies of their own users over time—the surveillance business model, the erosion of privacy, the monopoly power that eliminates alternatives, the regulatory capture that prevents accountability.  

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GET LimITED EDITION MERCH + FIGHT ENSHITTIFICATION

These are some of EFF's core fights and have been for over 35 years. EFF sues. EFF advocates. EFF codes. And EFF wins. EFF is the most profound and powerful disenshittifying force on the planet Earth, and I’ve been proud to fight alongside them for nearly 25 of those years.  

One of the lessons you learn in battles with very long timelines against very powerful actors is that these battles are deeply serious, and because of that they must also be fun. “Enshittification” took off as a shorthand in part because of the minor license to vulgarity it confers. It's slightly crass for a reason: getting people to engage with the abstract issues of tech policy can be hard at the best of times. No one knows this better than my colleagues at EFF, who consistently surprise me with their ability to make complex, technical concepts concrete, memorable, and sometimes even joyful. 

Words matter, but so do visuals. For the cover of the U.S. edition of my book, Enshittification, designer Devin Washburn of No Ideas studio created an iconic variation of the "pile of poo" emoji, with angry eyebrows and a grawlix-scrawled censor bar over its mouth. It instantly became the symbol of enshittification I’d been looking for. 

I liked it so much I ordered a couple hundred enamel pins and a couple thousand vinyl stickers and handed them out to people I met on my 33-city book tour. Even when giving them away, I was inundated with requests to buy more of them.  

I've since bought out Devin's rights to the image and released it under a Creative Commons Attribution 4.0 license—free for anyone to use, remix, or build on, including commercially, with attribution. The high-resolution files are on Wikimedia Commons, Flickr, and the Internet Archive (including a PSD with an ink-density adjustment layer). It belongs to the commons now. 

But I made sure EFF had first crack at the design for their “official merch,” and they've done right by it. There are two items available now in the EFF shop, and all proceeds go directly to EFF's work defending digital rights. I’ve spent years admiring EFF’s merch and consistent, creative visual identity, so it fills me with pride to see this more-than-a-mere-poop-emoji in their shop.  

A recognizable visual shorthand is a genuine organizing tool. When someone sees the enshittification emoji, they know what the conversation is about. When you wear the pin or slap the sticker on your laptop, you're signaling that you understand what's happening to the internet, and that you know we can do better.  

You can get a $5 sticker:

Or a $10 pin:

 

 Because the design is CC-licensed, you don't have to buy one. You can make your own merch, your own swag, your own illustrations. I made a lawn flag for my front garden.

 

But if you do want to buy a sticker or pin, you can do so while supporting the most profound and powerful disenshittifying force on the planet Earth—the Electronic Frontier Foundation.

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GET LimITED EDITION MERCH + FIGHT ENSHITTIFICATION

 

Across the country, surveillance companies have spun a vast web of tens of thousands of license plate cameras. The people selling this tech want you to believe that it's for your safety, but how are authorities really using automated license plate readers (ALPR)? In this week's EFFector newsletter, we're looking at how these powerful surveillance networks have become universal people-trackers used for noise complaints and other low-level investigations.

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For over 35 years, EFFector has been your guide to understanding the intersection of technology, civil liberties, and the law. This week's issue covers a victory for facial privacy, EFF's testimony to Congress about AI and surveillance, and troubling new examples of ALPR mission creep.

Prefer to listen in? EFFector is now available on all major podcast platforms. This week, we're chatting with EFF Associate Director of State Affairs Rindala Alajaji about what she uncovered about police use of ALPR. And don't miss the EFFector news quiz. You can find the episode and subscribe on your podcast platform of choice:

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Want to stay in the fight for privacy and free speech online? Sign up for EFF's EFFector newsletter for updates, ways to take action, and new merch drops. You can also fuel the fight against online surveillance when you support EFF today!

WhatsApp has caught the NSO Group phishing its users, in violation of a court order.

Inside the demise of a 15-year-old modeling scenario built off the worst possibilities scientists could imagine.

A three-year drought — and rising electricity demand — has complicated plans to power New York and Massachusetts with Canadian hydropower.

The leading vote-getter in the race for California insurance commissioner wants a state program to insure all wildfire damage to homes.

The forecast from the government's energy statistical bureau comes even as Energy Secretary Chris Wright said shipping traffic through the Strait of Hormuz is “rising very meaningfully.”

Brussels hopes that EU funding for solar panels in the Sahara Desert and wind turbines along the Mediterranean will lure private money to co-invest.

A faster switch from fossil fuels to electricity will be a “defining” priority of the Antalya conference.

Factory managers reported that severe temperatures are causing sweat stains on fabric, dust contamination, stitching errors and forced production halts.

A tropical storm warning was in effect from Puerto Sandino to the Guatemala/El Salvador border.

Interpreting medical ultrasound images is a difficult task, requiring a technician to look at 2D images and mentally arrange them into a 3D representation of what the tissue looks like. 

To make that job easier, MIT researchers developed a new approach to ultrasound imaging that allows the user to visualize a 3D augmented-reality image of the object being scanned. Using a virtual-reality headset, they can see a precise 3D digital representation of what the object actually looks like, making it easier to identify and analyze.

This technique could help speed up the training process for ultrasound technicians and other health care providers who use ultrasound. It could also be deployed for use in hospitals, for tasks such as using ultrasound to place a needle in the right location for a biopsy.

“For training, this could make ultrasound more intuitive and more understandable. On the clinical side, it could be less time-consuming, more accurate, and also give health care providers more peace of mind. They wouldn’t have to wonder if they missed anything,” says Canan Dagdeviren, an associate professor of media arts and sciences at MIT and the senior author of the study.

MIT graduate students Jason Hou and Shrihari Viswanath are the lead authors of the paper, which appears today in Nature Communications Engineering. Other authors of the paper include Bowen Wu ’24 and two MIT Summer Research Program students, Cinay Dilibal, a senior at Dartmouth College, and Tanisha Shende, a senior at Oberlin College.

3D representations

Ultrasound imaging works by bouncing high-frequency sound waves off tissues in the body, which are then reflected back to an ultrasound transducer. The transducer converts these sound waves to electrical signals, which are used to create a 2D image of the tissue. Ultrasound technicians are trained to convert these images into a 3D mental representation of the tissue.

“It's a difficult skill to master, and there are long learning curves,” says Hou. “The hardest thing is this mental tomography bottleneck where you’re trained to reconstruct the 2D slices in your 3D mental space. That is a cognitive burden that can lead to inaccuracies in scanning.”

To reduce that cognitive load, the MIT team thought it could be helpful to combine two technologies: 3D ultrasound imaging and augmented reality (AR). 

Three-dimensional ultrasound imaging is occasionally used in fields such as fetal imaging and echocardiography, which is used to image the heart, but most 3D ultrasound imaging systems are expensive and not widely available. For this study, the MIT team used a real-time 3D system they developed recently for use in breast-cancer detection.

Their new system includes an ultrasound probe, slightly smaller than a deck of cards, that transmits information using a chirped data acquisition system (cDAQ). The probe contains an ultrasound array arranged in the shape of an empty square, a configuration that allows the array to take 3D images of the tissue below.

Because this system has fewer ultrasound elements than a typical 3D ultrasound system, it requires less power and is less expensive to build.

The data collected by the ultrasound probe can then be compressed and streamed into a 3D computer graphics engine called Unreal Engine, which converts the voxel data from the ultrasound image into a direct 3D representation of the object, with no loss of information. Wearing an AR/VR headset, the user can see this 3D rendering representing the internal structure, superimposed over the object’s actual location — like X-ray vision. By tilting their head or approaching from a different direction, the user can see different views of the object, making it easier to identify.

Easier to use

The researchers tested their new technology, which they call AR-VIU (augmented real-time volumetric imaging in ultrasound), with a group of 18 participants. Nine of the subjects were experts in ultrasound technology (including sonographers and physicians), and nine had never used ultrasound before.

Each user performed identification tasks using four different ultrasound technologies. In one condition, they viewed 2D images on a regular screen, which is the way that most ultrasounds are now performed. They also viewed 3D images on a regular screen, as well as two augmented reality conditions: one 2D and one 3D (AR-VIU).

In one round of experiments, users were asked to identify an object embedded in gelatin — such as a spring, a ball, or a screw — inside an opaque container that was scanned with ultrasound. In a second set, they were asked to use a pen to mark the location of “tissue phantom” — a gel-like material engineered to mimic human tissue. This simulates the task of locating the right spot for a needle during a biopsy.

The researchers found that the AR-VIU system significantly improved all users’ ability to identify and locate objects. The effect was especially strong for novices, who performed nearly as well as experts when using AR-VIU. When using the traditional 2D imaging system, experts performed much better than novices.

“Overlaying images with the anatomy and providing 3D visual context makes ultrasound significantly easier for novices to understand,” Viswanath says.

In interviews after the experiments, most of the novices reported that they preferred the AR-VIU approach, with many saying that it made the tasks easier.

“The 3D system imposes less brain drain, it’s more intuitive, and it’s easier to understand what is happening in the targeted region,” Dagdeviren says.

Many of the experts said they preferred the traditional 2D imaging because that is what they were accustomed to and had been trained to use. However, those experts also said they could see the benefits of the AR-VIU system in some situations, such as placing a needle for a biopsy or visualizing the movement of the heart wall during echocardiography.

The researchers are now working on further improving the resolution of the imaging and doing additional tests to demonstrate the accuracy of the AR-VIU technology.

The research was funded by the MIT Media Lab Consortium, the National Science Foundation, an MIT HEALS graduate fellowship, and an MIT-Tata graduate fellowship.

Nature Climate Change, Published online: 10 June 2026; doi:10.1038/s41558-026-02659-0

Sea-level rise in conjunction with storm surge and tidal variations leads to extreme sea levels that threaten coastal systems. Here the authors use tide-gauge data and models to quantify how anthropogenic climate change has increased the risk of these extreme sea-level events since 1900.

Nature Climate Change, Published online: 10 June 2026; doi:10.1038/s41558-026-02689-8

Author Correction: Rising temperatures increase added sugar intake disproportionately in disadvantaged groups in the USA

Nature Climate Change, Published online: 10 June 2026; doi:10.1038/s41558-026-02633-w

Southern California is rarely affected by tropical cyclones at present. Here the authors show that this could change with warming, leading to an increase in landslide risk that is expected to disproportionately affect low-income households.

The rise of artificial intelligence is riding on the back of an enormous data center expansion. Data centers are projected to account for anywhere from 9 to 17 percent of total electricity usage in the U.S. by the end of the decade. Today, around a third of data center electricity is devoted to cooling the chips that run AI models.

That’s the process Ferveret is working to make more efficient. The startup, founded by Reza Azizian, a former MIT postdoc in nuclear engineering, and Matteo Bucci, MIT’s Esther and Harold E. Edgerton Associate Professor in the Department of Nuclear Science and Engineering, is adapting an approach from nuclear reactors to cool chips using no water and significantly less electricity.

The company’s cooling system submerges computer servers in a specialized liquid that absorbs heat much more efficiently than air from a fan. What makes the solution different from other liquid cooling systems are the bubbles: Ferveret’s Adaptive Phase Cooling (APC) solution produces much smaller bubbles at the surface of the server, which detach more frequently, accelerating the heat transfer process.

Ferveret is already testing its solutions with companies including CleanSpark, the data center developer and operator, as well as FuriosaAI, an AI accelerator company, and Switch, one of the largest data center operators in the U.S.

In a recent study in collaboration with the Samueli Computer Science Department at the University of California at Los Angeles, Ferveret found its APC solution led to a 15 percent improvement in computational power efficiency compared to state-of-the-art liquid cooling solutions. By combining those savings with Ferveret’s power control system to optimize operating conditions, the company says it allows data centers to get 35 percent more tokens — small pieces of text or data — from their AI models with the same amount of power.

“Our goal is to make data centers as sustainable as possible and help them use every single watt of power to generate tokens, which are the most useful outputs,” Azizian says. “Our system enables the operation of more powerful chips, it helps data centers waste a lot less energy, and it accomplishes all that with zero water consumption.”

From nuclear reactors to AI

Azizian was a postdoc at MIT in 2013 when he met Bucci, who was then a research scientist. They worked on heat transfer in nuclear reactors before Azizian went into industry, where he shifted his focus to cooling chips. Azizian first worked on Microsoft’s HoloLens augmented reality headset and then joined Nvidia, which produces the graphical processing units companies use to train and run the latest AI models. Meanwhile, Bucci continued conducting research at MIT, becoming an assistant professor in 2016.

Azizian walked into his first data center in 2017, where he was struck by the massive, noisy fans that filled the building as they cooled.

“I thought, ‘Holy crap, this is not how you cool facilities,’” Azizian recalls, noting air cooling can still take up 40 percent of the power going into a data center. “It was not an efficient way of doing things, but since it wasn’t hurting the performance, no one cared that the cooling technology was 50 years old.”

Azizian began talking with Bucci about applying their knowledge around optimizing heat transfer in nuclear reactors to data centers. Scientists have spent decades finding better ways to move heat in nuclear reactors.

“Heat transfer determines how much energy you can extract from the reactor core, which translates directly to revenue,” Azizian explains.

The founders started Ferveret in 2021. A lot has changed since Azizian walked into his first data center. Chip companies have packed more and more components onto their chips as the explosion in artificial intelligence has put a premium on squeezing as much computing capacity as possible out of limited power supplies.

That has driven data center operators to use liquid to cool chips — often through a technique known as immersion cooling that submerges chips in liquid. The most effective form of immersion cooling brings the liquid to a boil.

“Liquid is a better heat transfer medium than air. That’s why when you stick your hand into room temperature water it still feels cold,” Bucci explains. “When liquid is boiling, it becomes even better at removing heat because the phase change requires a lot of energy, which is the energy you remove from the chip. That lets you transfer large quantities of heat with minimal temperature differences between the chips and the liquid.”

Unfortunately, boiling liquid adds complexity to the system because it forces operators to capture and reliquefy the bubbles while controlling for pressure, temperature, and fluid inventory.

Ferveret’s system is adapted from a process in nuclear reactors called subcooled boiling. It uses a liquid with a low boiling point and none of the toxic PFAS “forever chemicals” that other approaches rely on. At the surface of the chip, Ferveret’s liquid produces smaller bubbles than other immersion cooling approaches. Those bubbles detach more frequently and quickly recondense in the surrounding liquid, accelerating the bubble-rewetting cycle at the surface of the chip to hasten heat transfer.

Ferveret delivers its APC system in small boxes, each of which houses one server. The founders say their modular systems make it easier to deploy the system and simplify maintenance.

“The physics enable us to get to form factors that weren’t possible in the past,” Azizian says. “Most immersion cooling solutions are large tanks that people submerge the servers in. We have a smaller, modular rack-mounted solution that makes it adaptable to the current infrastructure, so it’s easier for people to deploy our technology.”

Ferveret also offers control software that adjusts the power going to each server in real-time to further improve efficiency.

“We deliver full-stack systems that include the cooling box, the rack, the cooling distribution units, and sensors that measure the temperature and pressure,” Bucci says. “Our software monitors those sensors and optimizes the operating condition inside each box to ensure that energy consumption is minimized in the system.”

AI with fewer resources

In addition to helping data centers to run more efficiently, Ferveret is also improving sustainability by making it easier to operate data centers in remote regions with more renewable energy.

“The sun shines in places where you don’t have much water, so the advantage of us being water-free is we allow you to build data centers where you have solar energy but nothing to cool the data center down,” Bucci says. “This technology can help deploy data centers in regions where normally you wouldn’t have the resources to do so, including Africa, the Middle East, and of course parts of America. It’s a huge unlock.”

Ferveret is in talks with the large cloud computing companies known as hyperscalers, and is currently part of Nvidia’s Inception program for startups. The company plans to announce expanded partnerships later this year. From there, the founders plan to quickly scale their technology to help the AI industry continue to grow without further straining the planet.

“The computing industry is facing a huge challenge in the form of access to power, and they have a problem with access to water in many regions,” Azizian says. “That will only become more limiting as the industry grows. The main goal for these data center operators would be to get more tokens from the power they have. We’ve shown we can do that.”

The Senate Judiciary Committee is set to consider and vote on the Nurture Originals, Foster Art, and Keep Entertainment Safe Act (NO FAKES). Instead of targeting the real privacy harms posed by AI-generated replicas, this law would create another layer of internet censorship on top of the already existing legal and voluntary takedown systems. Congress should reject NO FAKES.

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Tell Congress to Say No to NO FAKES

As currently written, NO FAKES proposes to tackle the problems of misleading AI-generated replicas by creating a broad property right in someone's look, voice, and general style. However, there are all kinds of First Amendment-protected expression that would be swept under the NO FAKES regime—think about parody, news, criticism.

NO FAKES also does a laughable job of protecting artists from use of their image in misleading ways. It doesn’t create a privacy right, but rather a property right that can easily be signed away—as major studios and record labels are almost certain to require in their contracts with artists. As a result, NO FAKES actually creates a new avenue for the exploitation of artists by companies instead of protection from misleading replicas. 

The bill also makes it trivially easy for protected speech to be censored. It is a supercharged version of the already flawed copyright takedown regime. It would essentially require platforms to institute filters that don't just look for exact matches of copyrighted material, as current filters do, but anything that might be a digital replica. Even though the latest version of this bill adds some forms of redress for bad faith takedowns, those provisions lack the teeth required to deter a malicious actor. 

NO FAKES targets speech, tools, and innovation instead of focusing on the real concern posed by these replicas: privacy. This bill was a bad idea when it was introduced, and got even worse when it was amended last year. Tell Congress to just say no to NO FAKES.

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Tell Congress to Say No to NO FAKES