Edge of Mars’ great dichotomy eroded back by hundreds of kilometers

What may have been an ancient shoreline has signs of a water-driven transformation.

For decades, we have been imaging the surface of Mars with ever-finer resolution, cataloging a huge range of features on its surface, studying their composition, and, in a few cases, dispatching rovers to make on-the-ground readings. But a catalog of what's present on Mars doesn't give us answers to what's often the key question: how did a given feature get there? In fact, even with all the data we have available, there are a number of major bits of Martian geography that have produced major academic arguments that have yet to be resolved.

In Monday's issue of Nature Geoscience, a team of UK-based researchers tackle a big one: Mars' dichotomy, the somewhat nebulous boundary between its relatively elevated southern half, and the low basin that occupies its northern hemisphere, a feature that some have proposed also served as an ancient shoreline. The new work suggests that the edge of the dichotomy was eroded back by hundreds of kilometers during the time when an ocean might have occupied Mars' northern hemisphere.

Close to the edge

To view the Martian dichotomy, all you need to do is color-code a relief map of the Martian surface, something that NASA has conveniently done for us. Barring a couple of enormous basins, the entire southern hemisphere of the red planet is elevated by a kilometer or more, and sits atop a far thicker crust. With the exception of the volcanic Tharsis region the boundary between these two areas runs roughly along the equator.

Read full article

Comments

Edge of Mars’ great dichotomy eroded back by hundreds of kilometers

What may have been an ancient shoreline has signs of a water-driven transformation.

For decades, we have been imaging the surface of Mars with ever-finer resolution, cataloging a huge range of features on its surface, studying their composition, and, in a few cases, dispatching rovers to make on-the-ground readings. But a catalog of what's present on Mars doesn't give us answers to what's often the key question: how did a given feature get there? In fact, even with all the data we have available, there are a number of major bits of Martian geography that have produced major academic arguments that have yet to be resolved.

In Monday's issue of Nature Geoscience, a team of UK-based researchers tackle a big one: Mars' dichotomy, the somewhat nebulous boundary between its relatively elevated southern half, and the low basin that occupies its northern hemisphere, a feature that some have proposed also served as an ancient shoreline. The new work suggests that the edge of the dichotomy was eroded back by hundreds of kilometers during the time when an ocean might have occupied Mars' northern hemisphere.

Close to the edge

To view the Martian dichotomy, all you need to do is color-code a relief map of the Martian surface, something that NASA has conveniently done for us. Barring a couple of enormous basins, the entire southern hemisphere of the red planet is elevated by a kilometer or more, and sits atop a far thicker crust. With the exception of the volcanic Tharsis region the boundary between these two areas runs roughly along the equator.

Read full article

Comments

GPD Duo dual-screen laptop review: When two screens are better than one

The GPD Duo is a dual-screen laptop that sometimes feels like the Swiss Army Knife of mobile computers. It has a robust set of ports that includes USB4, OCuLink, and 2.5 Gb Ethernet. It’s available with up to an AMD Ryzen AI 9 HX 370 Strix Point …

The GPD Duo is a dual-screen laptop that sometimes feels like the Swiss Army Knife of mobile computers. It has a robust set of ports that includes USB4, OCuLink, and 2.5 Gb Ethernet. It’s available with up to an AMD Ryzen AI 9 HX 370 Strix Point processor and 64GB of RAM. And it has two 2.8K […]

The post GPD Duo dual-screen laptop review: When two screens are better than one appeared first on Liliputing.

DC-area veterinarians on heightened alert amid potential inauguration risks

There is no specific threat, but the alert highlights One Health approach to risk.

Veterinarians in the Washington, DC region have been put on alert for any unusual illnesses in their non-human patients amid today's presidential inauguration—a nod to the significance of potential zoonotic bioterror threats.

In a recent letter to Virginia veterinarians, the state health department requested assistance in the "enhanced surveillance," while noting that, currently, there is no report of threats or bioterrorism-related illnesses.

"As with any large-scale public event, there will be heightened security, and the region will be on alert or signs of bioterrorism or other potential threats," the letter read. "Enhanced surveillance is being conducted out of an abundance of caution."

Read full article

Comments

Robotic hand helps pianists overcome “ceiling effect”

Passive training with robotic exoskeleton hand even led to motor improvements in the untrained hand.

Fast and complex multi-finger movements generated by the hand exoskeleton. Credit: Shinichi Furuya

When it comes to fine-tuned motor skills like playing the piano, practice, they say, makes perfect. But expert musicians often experience a "ceiling effect," in which their skill level plateaus after extensive training. Passive training using a robotic exoskeleton hand could help pianists overcome that ceiling effect, according to a paper published in the journal Science Robotics.

“I’m a pianist, but I [injured] my hand because of overpracticing,” coauthor Shinichi Furuya of Kabushiki Keisha Sony Computer Science Kenkyujo told New Scientist. “I was suffering from this dilemma, between overpracticing and the prevention of the injury, so then I thought, I have to think about some way to improve my skills without practicing.” Recalling that his former teachers used to place their hands over his to show him how to play more advanced pieces, he wondered if he could achieve the same effect with a robotic hand.

So Furuya et al. used a custom-made exoskeleton robot hand capable of moving individual fingers on the right hand independently, flexing and extending the joints as needed. Per the authors, prior studies with robotic exoskeletons focused on simpler movements, such as assisting in the movement of limbs stabilizing body posture, or helping grasp objects. That sets the custom robotic hand used in these latest experiments apart from those used for haptics in virtual environments.

Read full article

Comments

“Project Mini Rack” wants to make your non-closet-sized rack server a reality

Wiki-style guide compiles all the pieces and potential of a rack you can carry.

I have one standard rack appliance in my home: a Unifi Dream Machine Pro. It is mounted horizontally in a coat closet, putting it close to my home's fiber input and also incidentally keeping our jackets gently warm. I can fit juuuuuust about one more standard rack-size device in there (maybe a rack-mount UPS?) before I have to choose between outer-wear and overly ambitious networking. Were I starting over, I might think a bit more about scalability.

Along those lines, technologist and YouTube maker Jeff Geerling has launched the Project Mini Rack page for folks who have similarly server-sized ambitions, coupled with a lack of square footage. "I mean, if you want to cosplay as a sysadmin, you need a rack, right?" Geerling says in the announcement video. It's a keen launching point for a new "homelab" or "minilab" project, also known as bringing the networking and hardware challenges of a commercial network deployment into your home for "fun."

Project Mini Rack announcement video, from Jeff Geerling.

It's a good time fall into the compact computing space. As Geerling notes in a blog post announcing the project, there's a whole lot of small-form-factor PCs on the market. You can couple them with single-board computers, power-over-Ethernet devices, and network-accessible solid state drives that allow you to stuff a whole lab into a cube you can carry around in your hands.

Read full article

Comments

Authors Seek Meta’s Torrent Client Logs and Seeding Data in AI Piracy Probe

Meta is among a long list of companies being sued for allegedly using pirated material to train its AI models. Meta has never denied using copyrighted works but stressed that it would rely on a fair use defense. However, with rightsholders in one case asking for torrent client data and ‘seeding lists’ for millions of books allegedly shared in public, the case now takes a geeky turn.

From: TF, for the latest news on copyright battles, piracy and more.

meta logoOver the past two years, AI development has progressed at a rapid pace.

This includes large language models, which are typically trained on broad datasets of texts; the more, the better.

When AI hit the mainstream, it became apparent that many rightsholders had concerns over the unauthorized use of their copyright works. Creatives including photographers, artists, musicians, journalists, and authors, responded by filed copyright infringement lawsuits to protect their rights.

Book authors, in particular, complained about the use of pirated books as training material. In various lawsuits, companies including OpenAI, Microsoft, Meta, and NVIDIA are accused of obtaining books from ‘pirate’ sources, including the controversial Books3 database and shadow library LibGen.

Meta Acknowledges ‘Pirate’ Sourcing Early On

One of the most intriguing cases, especially for those interested in the piracy angle, is the class action lawsuit filed by authors including Richard Kadrey, Sarah Silverman, and Christopher Golden. The authors accuse Meta of using their work without permission.

While this may sound problematic to some, Mark Zuckerberg’s Meta didn’t beat around the bush. More than a year ago the company admitted that unofficial sources, comprised of pirated content, were used as training input.

Crucially, however, Meta denied the copyright infringement allegations, noting that it would rely on a fair use defense, at least in part.

“To the extent that Meta made any unauthorized copies of any Plaintiffs’ registered copyrighted works, such copies constitute fair use under 17 U.S.C. § 107,” Meta said in its early response.

A Spotlight on Meta’s Torrenting Activity

The fair use defense will be central in many AI copyright infringement lawsuits. AI companies generally believe that use of ‘public’ data as training inputs is justified. They characterize the use as transformative and argue that it doesn’t compete with the original market for these works.

Whether that is indeed the case is a question that may ultimately end up at the Supreme Court. Meanwhile, however, rightsholders in this lawsuit have raised additional allegations of copyright infringement.

A few weeks ago, the plaintiffs asked for permission to submit a third amended complaint. After uncovering Meta’s use of BitTorrent to source copyright-infringing training data from pirate shadow library, LibGen, the request was justified, they argued.

libgentorrents

Specifically, the authors say that Meta willingly used BitTorrent to download pirated books from LibGen, knowing that was legally problematic. As a result, Meta allegedly shared copies of these books with other people, as is common with the use of BitTorrent.

“By downloading through the bit torrent protocol, Meta knew it was facilitating further copyright infringement by acting as a distribution point for other users of pirated books,” the amended complaint notes.

“Put another way, by opting to use a bit torrent system to download LibGen’s voluminous collection of pirated books, Meta ‘seeded’ pirated books to other users worldwide.”

Seeded

libgen torrent

Court Greenlights Torrent Piracy Probe

Meta believed that the allegations weren’t sufficiently new to warrant an update to the complaint. The company argued that it was already a well-known fact that it used books from these third-party sources, including LibGen.

However, the authors maintained that the ‘torrent’ angle is novel and important enough to warrant an update. Last week, United States District Judge Vince Chhabria agreed, allowing the introduction of these new allegations.

In addition to greenlighting the amended complaint, the Judge also allowed the authors to conduct further testimony on the “seeding” angle.

“[E]vidence about seeding is relevant to the existing claim because it is potentially relevant to the plaintiffs’ assertion of willful infringement or to Meta’s fair use defense,” Judge Chhabria wrote last week.

Authors Want Meta’s Torrent Client Logs and Seeding Data

With the court recognizing the relevance of Meta’s torrenting activity, the plaintiffs requested reconsideration of an earlier order, where discovery on BitTorrent-related matters was denied.

Through a filing submitted last Wednesday, the plaintiffs hope to compel Meta to produce its BitTorrent logs and settings, including peer lists and seeding data.

“The Order denied Plaintiffs’ motion to compel production of torrenting data, including Meta’s BitTorrent client, application logs, and peer lists. This data will evidence how much content Meta torrented from shadow libraries and how much it seeded to third parties as a host of this stolen IP,” they write.

While archiving lists of seeders is not a typical feature for a torrent client, the authors are requesting Meta to disclose any relevant data.

In addition, they also want the court to reconsider its ruling regarding the crime-fraud exception. That’s important, they suggest, as Meta’s legal counsel was allegedly involved in matters related to torrenting.

“Meta, with the involvement of in-house counsel, decided to obtain copyrighted works without permission from online databases of copyrighted works that ‘we know to be pirated, such as LibGen’, they write.

Modified Settings

settings

The authors allege that this involved “seeding” files and that Meta attempted to “conceal its actions” by limiting the amount of data shared with the public. One Meta employee also asked for guidance, as “torrenting from a corporate laptop doesn’t feel right.”

Meta as Distributor

With the addition of a torrent angle, the amended complaint adds a new element to the case. One that could potentially be crucial, particularly for the fair use defense.

The plaintiffs now accuse Meta of operating as a distributor of the pirated works. While that has little to do with how the works were used to train AI, it’s a copyright claim, nonetheless, and one that might be harder to defend as fair use.

Whether this will substantially change the case has yet to be seen, but it’s certainly fuel for legal fireworks. That said, these torrent allegations are just a small fraction of the case, which will be fought tooth and nail by both sides.

A copy of the plaintiffs’motion for relief from the non-dispositive pretrial order submitted on January 15, is available here (pdf). A copy of the third-amended complaint can be found here (pdf)

From: TF, for the latest news on copyright battles, piracy and more.

Sleeping pills stop the brain’s system for cleaning out waste

A specialized system sends pulses of pressure through the fluids in our brain.

Our bodies rely on their lymphatic system to drain excessive fluids and remove waste from tissues, feeding those back into the blood stream. It’s a complex yet efficient cleaning mechanism that works in every organ except the brain. “When cells are active, they produce waste metabolites, and this also happens in the brain. Since there are no lymphatic vessels in the brain, the question was what was it that cleaned the brain,” Natalie Hauglund, a neuroscientist at Oxford University who led a recent study on the brain-clearing mechanism, told Ars.

Earlier studies done mostly on mice discovered that the brain had a system that flushed its tissues with cerebrospinal fluid, which carried away waste products in a process called glymphatic clearance. “Scientists noticed that this only happened during sleep, but it was unknown what it was about sleep that initiated this cleaning process,” Hauglund explains.

Her study found the glymphatic clearance was mediated by a hormone called norepinephrine and happened almost exclusively during the NREM sleep phase. But it only worked when sleep was natural. Anesthesia and sleeping pills shut this process down nearly completely.

Read full article

Comments