Slashdot has been covering Harvard's legendary introductory programming course "CS50" since it began setting attendance records in 2014.

But now long-time Slashdot reader theodp brings some news about the course's fate over at Yale. From Yale's student newspaper: After a decade of partnership with Harvard, Yale's CS50 course will no longer be offered starting in fall 2025.... One of Yale's largest computer science courses, jointly taught with Harvard University, was canceled during a monthly faculty meeting after facing budgetary challenges. [Yale's endowment is $40+ billion]... Since Yale started offering the course in 2015, CS50 has consistently seen enrollment numbers in the hundreds and was often the department's largest class.... According to [Yale instructor Ozan] Erat, the original [anonymous] donation that made CS50 possible ended in June 2024, and the cost of employing so many undergraduate learning assistants for the course had become unsustainable.
theodp reminds us that CS50 and its progeny "will continue to live on in all their glory in-person and online at Harvard and edX."

Scientists have demonstrated control over a newly theorized type of magnetism, known as altermagnetism, by manipulating nanoscale magnetic whirlpools in an ultra-thin wafer of manganese telluride. "Our experimental work has provided a bridge between theoretical concepts and real-life realization, which hopefully illuminates a path to developing altermagnetic materials for practical applications," says University of Nottingham physicist Oliver Amin, who led the research with PhD student Alfred Dal Din. From the report: Using a device that accelerates electrons to blinding speeds, a team led by researchers from the University of Nottingham showered an ultra-thin wafer of manganese telluride with X-rays of different polarizations, revealing changes on a nanometer scale reflecting magnetic activity unlike anything seen before. [...] More recently, a third configuration of particles in ferromagnetic materials was theorized.

In what's referred to as altermagnetism, particles are arranged in a canceling fashion like antiferromagnetism, yet rotated just enough to allow for confined forces on a nanoscale -- not enough to pin a grocery list to your freezer, but with discrete properties that engineers are keen to manipulate into storing data or channeling energy. "Altermagnets consist of magnetic moments that point antiparallel to their neighbors," explains University of Nottingham physicist Peter Wadley. "However, each part of the crystal hosting these tiny moments is rotated with respect to its neighbors. This is like antiferromagnetism with a twist! But this subtle difference has huge ramifications."

Experiments have since confirmed the existence of this in-between 'alter' magnetism. However, none had directly demonstrated it was possible to manipulate its tiny magnetic vortices in ways that might prove useful. Wadley and his colleagues demonstrated that a sheet of manganese telluride just a few nanometers thick could be distorted in ways that intentionally created distinct magnetic whirlpools on the wafer's surface. "Our experimental work has provided a bridge between theoretical concepts and real-life realization, which hopefully illuminates a path to developing altermagnetic materials for practical applications," says University of Nottingham physicist Oliver Amin. This research was published in the journal Nature.

Two computer scientists at the University of Waterloo in Canada believe changing 30 lines of code in Linux "could cut energy use at some data centers by up to 30 percent," according to the site Data Centre Dynamics.

It's the code that processes packets of network traffic, and Linux "is the most widely used OS for data center servers," according to the article: The team tested their solution's effectiveness and submitted it to Linux for consideration, and the code was published this month as part of Linux's newest kernel, release version 6.13. "All these big companies — Amazon, Google, Meta — use Linux in some capacity, but they're very picky about how they decide to use it," said Martin Karsten [professor of Computer Science in the Waterloo's Math Faculty]. "If they choose to 'switch on' our method in their data centers, it could save gigawatt hours of energy worldwide. Almost every single service request that happens on the Internet could be positively affected by this."

The University of Waterloo is building a green computer server room as part of its new mathematics building, and Karsten believes sustainability research must be a priority for computer scientists. "We all have a part to play in building a greener future," he said. The Linux Foundation, which oversees the development of the Linux OS, is a founder member of the Green Software Foundation, an organization set up to look at ways of developing "green software" — code that reduces energy consumption.
Karsten "teamed up with Joe Damato, distinguished engineer at Fastly" to develop the 30 lines of code, according to an announcement from the university. "The Linux kernel code addition developed by Karsten and Damato was based on research published in ACM SIGMETRICS Performance Evaluation Review" (by Karsten and grad student Peter Cai).

Their paper "reviews the performance characteristics of network stack processing for communication-heavy server applications," devising an "indirect methodology" to "identify and quantify the direct and indirect costs of asynchronous hardware interrupt requests (IRQ) as a major source of overhead...

"Based on these findings, a small modification of a vanilla Linux system is devised that improves the efficiency and performance of traditional kernel-based networking significantly, resulting in up to 45% increased throughput..."

The University of Colorado Boulder's magazine recently wrote: What happened during the "Snowball Earth" period is perplexing: Just as the planet endured about 100 million years of deep freeze, with a thick layer of ice covering most of Earth and with low levels of atmospheric oxygen, forms of multicellular life emerged. Why? The prevailing scientific view is that such frigid temperatures would slow rather than speed evolution. But fossil records from 720 to 635 million years ago show an evolutionary spurt preceding the development of animals...

Carl Simpson, a macroevolutionary paleobiologist at CU Boulder, has found evidence that cold seawater could have jump-started — rather than suppressed — evolution from single-celled to multicellular life forms.
That evidence is described in Quanta magazine: Simpson proposes an answer linked to a fundamental physical fact: As seawater gets colder, it gets more viscous, and therefore more difficult for very small organisms to navigate. Imagine swimming through honey rather than water... To test the idea, Simpson, a paleobiologist at the University of Colorado, Boulder, and his team conducted an experiment designed to see what a modern single-celled organism does when confronted with higher viscosity... In an enormous, custom-made petri dish, [grad student Andrea] Halling and Simpson created a bull's-eye target of agar gel — their own experimental gauntlet of viscosity. At the center, it was the standard viscosity used for growing these algae in the lab. [Green algae, which swims with a tail-like flagellum.] Moving outward, each concentric ring had higher and higher viscosity, finally reaching a medium with four times the standard level. The scientists placed the algae in the middle, turned on a camera, and left them alone for 30 days — enough time for about 70 generations of algae to live, swim around for nutrients and die...

After 30 days, the algae in the middle were still unicellular. As the scientists put algae from thicker and thicker rings under the microscope, however, they found larger clumps of cells. The very largest were wads of hundreds. But what interested Simpson the most were mobile clusters of four to 16 cells, arranged so that their flagella were all on the outside. These clusters moved around by coordinating the movement of their flagella, the ones at the back of the cluster holding still, the ones at the front wriggling.
"One thing that you learn about small organisms from a physics point of view is that they don't experience the world the same way that we do, as larger-bodied organisms," Simpson says in the university's article. It says that instead unicellular organisms are specifically "affected by the viscosity, or thickness, of sea water," and Simpson adds that "basically, that would trigger the origin of animals, potentially."

Last year Simpson posted a preprint on biorxiv.org. (And he also co-authored an article on "physical constraints during Snowball Earth drive the evolution of multicellularity.")

There's a video showing algae in Simpson's lab clumping together in viscous water. "This observed behavior adds evidence to Simpson's hypothesis that single-celled organisms clumped together to their mutual advantage during the 'Snowball Earth' period," says the video's description, "thus adding momentum to the rise of multicellular organisms." But Simpson says in the university's article, "To actually see it empirically means there's something to this idea."

Simpson and colleagues have now received a $1 million grant to study grains of sand made from calcium carbonate and called ooids, since their diameter "could be a proxy measurement of Earth's temperature for the last 2.5 billion years," according to the university's article. Geologist Lizzy Trower says the research "can tell us something about the chemistry and water temperature in which they formed." And more importantly, "Does the fossil record agree with the predictions we would make based on this theory from this new record of temperature?" Trower and Simpson's work also has potential implications for the human quest to find life elsewhere in the universe, Trower said. If extremely harsh and cold environments can spur evolutionary change, "then that is a really different type of thing to look for in exoplanets (potentially life-sustaining planets in other solar systems), or think about when and where (life) would exist."

Long-time Slashdot reader theodp writes: In an Op-ed for The Huntington News, fourth year Northeastern University CS student Derek Kaplan argues that real pedagogical merit is what should count when deciding which language to use to teach CS fundamentals (aka 'Fundies'). He makes the case for Northeastern to reconsider its decision to move from Racket to Python and Java later this year in an overhaul of its first-year curriculum.

"Students will get extensive training in Python, which is currently the most requested language by co-op employers," Northeastern explains (some two decades after a Slashdot commenter made the same Hot Languages = Jobs observation in a spirited 2001 debate on Java as a CS introductory language)...

"I have often heard computer science students complain that Fundies 1 teaches Racket instead of a 'useful language' like Python," Kaplan writes. "But the point of Fundies is not to teach Racket — it is to teach program design skills that can be applied using any programming language. Racket is just the tool it uses to do so. A student who does well in Fundies will have no difficulty applying the same skills to Python or any other language. And with how fast the tech industry changes, is it really worth having a course that teaches just Python when tomorrow, some other language might dominate the industry? Our current curriculum focuses on timeless principles rather than fleeting trends."

Also expressing concerns about the selection of suitable languages for novice programming is King's College CS Prof Michael Kölling, who explains, "One of the drivers is the perceived usefulness of the language in a real-world context. Students (and their parents) often have opinions which language is 'better' to learn. In forming these opinions, the definition of 'better' can often be vague and driven by limited insight. One strong aspect commonly cited is the perceived usefulness of a language in the 'real world.' If a language is widely used in industry, it is more likely to be seen as a useful language to learn." Kölling's recommendation? "We need a new language for teaching novices at secondary school and introductory university level," Kölling concludes. "This language should be designed explicitly for teaching [...] Maintenance and adaptation of this language should be driven by pedagogical considerations, not by industry needs."

While noble in intent, one suspects Kaplan and Kölling may be on a quixotic quest in a money wins world, outgunned by the demands, resources, and influence of tech giants like Amazon — the top employer of Northeastern MSCS program grads — who pushed back against NSF advice to deemphasize Java in high school CS and dropped $15 million to have tech-backed nonprofit Code.org develop and push a new Java-based, powered-by-AWS CS curriculum into high schools with the support of a consortium of politicians, educators, and tech companies. Echoing Northeastern, an Amazon press release argued the new Java-based curriculum "best prepares students for the next step in their education and careers."

A 19-year-old wrongfully accused of using AI told the Guardian's reporter that "to be accused of it because of 'signpost phrases', such as 'in addition to' and 'in contrast', felt very demeaning." And another student "told me they had been pulled into a misconduct hearing — despite having a low score on Turnitin's AI detection tool — after a tutor was convinced the student had used ChatGPT, because some of his points had been structured in a list, which the chatbot has a tendency to do." Dr Mike Perkins, a generative AI researcher at British University Vietnam, believes there are "significant limitations" to AI detection software. "All the research says time and time again that these tools are unreliable," he told me. "And they are very easily tricked." His own investigation found that AI detectors could detect AI text with an accuracy of 39.5%. Following simple evasion techniques — such as minor manipulation to the text — the accuracy dropped to just 22.1%. As Perkins points out, those who do decide to cheat don't simply cut and paste text from ChatGPT, they edit it, or mould it into their own work. There are also AI "humanisers", such as CopyGenius and StealthGPT, the latter which boasts that it can produce undetectable content and claims to have helped half a million students produce nearly 5m papers...

Many academics seem to believe that "you can always tell" if an assignment was written by an AI, that they can pick up on the stylistic traits associated with these tools. Evidence is mounting to suggest they may be overestimating their ability. Researchers at the University of Reading recently conducted a blind test in which ChatGPT-written answers were submitted through the university's own examination system: 94% of the AI submissions went undetected and received higher scores than those submitted by the humans...

Many universities are already adapting their approach to assessment, penning "AI-positive" policies. At Cambridge University, for example, appropriate use of generative AI includes using it for an "overview of new concepts", "as a collaborative coach", or "supporting time management". The university warns against over-reliance on these tools, which could limit a student's ability to develop critical thinking skills. Some lecturers I spoke to said they felt that this sort of approach was helpful, but others said it was capitulating. One conveyed frustration that her university didn't seem to be taking academic misconduct seriously any more; she had received a "whispered warning" that she was no longer to refer cases where AI was suspected to the central disciplinary board.
The Guardian notes one teacher's idea of more one-to-one teaching and live lectures — though he added an obvious flaw: "But that would mean hiring staff, or reducing student numbers." The pressures on his department are such, he says, that even lecturers have admitted using ChatGPT to dash out seminar and tutorial plans. No wonder students are at it, too.
The article points out "More than half of students now use generative AI to help with their assessments, according to a survey by the Higher Education Policy Institute, and about 5% of students admit using it to cheat." This leads to a world where the anti-cheating software Turnitin "has processed more than 130m papers and says it has flagged 3.5m as being 80% AI-written. But it is also not 100% reliable; there have been widely reported cases of false positives and some universities have chosen to opt out. Turnitin says the rate of error is below 1%, but considering the size of the student population, it is no wonder that many have found themselves in the line of fire." There is also evidence that suggests AI detection tools disadvantage certain demographics. One study at Stanford found that a number of AI detectors have a bias towards non-English speakers, flagging their work 61% of the time, as opposed to 5% of native English speakers (Turnitin was not part of this particular study). Last month, Bloomberg Businessweek reported the case of a student with autism spectrum disorder whose work had been falsely flagged by a detection tool as being written by AI. She described being accused of cheating as like a "punch in the gut". Neurodivergent students, as well as those who write using simpler language and syntax, appear to be disproportionately affected by these systems.
Thanks to Slashdot reader Bruce66423 for sharing the article.

The Washington Post reports: Years before the internet was created and the first smartphones buzzed to life, an educational platform called PLATO offered a glimpse of the digital world to come. Launched in 1960 at the University of Illinois at Urbana-Champaign [UIUC], it was the first generalized, computer-based instructional system, and grew into a home for early message boards, emails, chatrooms, instant messaging and multiplayer video games.

The platform's developer, Donald Bitzer, was a handball-playing, magic-loving electrical engineer who opened his computer lab to practically everyone, welcoming contributions from Illinois undergrads as well as teenagers who were still in high school. Dr. Bitzer, who died Dec. 10 at age 90, spent more than two decades working on PLATO, managing its growth and development while also pioneering digital technologies that included the plasma display panel, a forerunner of the ultrathin screens used on today's TVs and tablets. "All of the features you see kids using now, like discussion boards or forums and blogs, started with PLATO," he said during a 2014 return to Illinois, his alma mater. "All of the social networking we take for granted actually started as an educational tool."
Long-time Slashdot reader theodp found another remembrance online. "Ray Ozzie, whose LinkedIn profile dedicates more space to describing his work as a PLATO developer as a UIUC undergrad than it does to his later successes as a creator of Lotus Notes and as Microsoft's Chief Software Architect, offers his own heartfelt mini-obit." Ozzie writes: It's difficult to adequately convey how much impact he had on so many, and I implore you to take a few minutes to honor him by reading a bit about him and his contributions. Links below. As an insecure young CS student at UIUC in 1974, Paul Tenczar, working for/with Don, graciously gave me a chance as a jr. systems programmer on the mind-bogglingly forward thinking system known as PLATO. A global, interactive system for learning, collaboration, and community like no other at the time. We were young and in awe of how Don led, inspired, and managed to keep the project alive. I was introverted; shaking; stage fright. Yeah I could code. But how could such a deeply technical engineer assemble such a strong team to execute on such a totally novel and inspirational vision, secure government funding, and yet also demo the product on the Phil Donahue show?

"Here's to the crazy ones. The misfits. The rebels. The troublemakers. The ones who see things differently. They're not fond of rules." You touched so many of us and shaped who we became and the risks we would take, having an impact well beyond that which you created. You made us think and you made us laugh. I hope we made you proud."

A team of undergraduate students from the University of Southern California's Rocket Propulsion Lab set multiple amateur spaceflight records with their rocket, Aftershock II. "The student-made missile soared 90,000 feet (27,400 meters) beyond the previous record-holder -- a rocket launched more than 20 years ago," reports Live Science. From the report: The students launched Aftershock II on Oct. 20 from a site in Black Rock Desert, Nevada. The rocket stood about 14 feet (4 meters) tall and weighed 330 pounds (150 kilograms). The rocket broke the sound barrier just two seconds after liftoff and reached its maximum speed roughly 19 seconds after launch, the RPL team wrote in a Nov. 14 paper summarizing the launch. The rocket's engine then burned out, but the craft continued to climb as atmospheric resistance decreased, enabling it to leave Earth's atmosphere 85 seconds after launch and then reach its highest elevation, or apogee, 92 seconds later. At this point, the nose cone separated from the rest of the rocket and deployed a parachute so it could safely reenter the atmosphere and touch down in the desert, where it was collected by the RPL team for analysis.

The rocket's apogee was around 470,000 feet (143,300 m) above Earth's surface, which is "further into space than any non-governmental and non-commercial group has ever flown before," USC representatives wrote in a statement. The previous record of 380,000 feet (115,800 m) was set in 2004 by the GoFast rocket made by the Civilian Space Exploration Team. During the flight, Aftershock II reached a maximum speed of around 3,600 mph (5,800 km/h), or Mach 5.5 -- five and a half times the speed of sound. This was slightly faster than GoFast, which had also held the amateur speed record for 20 years.

But elevation and speed were not the only records Aftershock II broke. "This achievement represents several engineering firsts," Ryan Kraemer, an undergraduate mechanical engineering student at USC and executive engineer of the RPL team who will soon join SpaceX's Starship team, said in the statement. "Aftershock II is distinguished by the most powerful solid-propellant motor ever fired by students and the most powerful composite case motor made by amateurs."

A new study reveals that many users, particularly students and Redditors, view Z-Library as a vital resource for overcoming economic barriers to education, reflecting a "Robin Hood" mentality that prioritizes access to knowledge over copyright concerns. TorrentFreak reports: The research looks at the motivations of two groups; Reddit users and Chinese postgraduate students. Despite the vast differences between these groups, their views on Z-Library are quite similar. The 134 Reddit responses were sampled from the Zlibrary subreddit, which is obviously biased in favor of the site. However, the reasoning goes well beyond a simple "I want free stuff" arguments. Many commenters highlighted that they were drawn to the site out of poverty, for example, or they highlighted that Z-Library was an essential tool to fulfill their academic goals.

"Living in a 3rd world country, 1 book would cost like 50%- 80% already of my daily wage," one Redditor wrote. The idea that Z-Library is a 'necessary evil' was also highlighted by other commenters. This includes a student who can barely make ends meet, and a homeless person, who has neither the money nor the space for physical books. The lack of free access to all study materials, including academic journal subscriptions at university libraries, was also a key motivator. Paired with the notion that journal publishers make billions of dollars, without compensating authors, justification is found for 'pirate' alternatives. "They make massive profits. So stealing from them doesn't hurt the authors nor reviewers, just the rich greedy publishers who make millions just to design a cover and click 'publish'," one Redditor wrote.

The second part of the study is conducted in a more structured format among 103 postgraduate students in China. This group joined a seminar where Z-Library and the crackdown were discussed. In addition, the students participated in follow-up focus group discussions, while also completing a survey. Despite not all being users of the shadow library, 41% of the students agreed that the site's (temporary) shutdown affected their ability to study and find resources for degree learning. In general, the students have a favorable view toward Z-Library and similar sites, and 71% admit that they have used a shadow library in the past. In line with China's socialist values, the overwhelming majority of the students agreed that access to knowledge should be free for everyone. While the students are aware of copyright law, they believe that the need to access knowledge outweighs rightsholders' concerns. This is also reflected in the following responses, among others. All in all, Z-Library and other shadow libraries are seen as a viable option for expensive or inaccessible books, despite potential copyright concerns. The paper has been published in the Journal of University Teaching & Learning Practice.

A new study suggests Uranus' moon Miranda may harbor a vast subsurface ocean, challenging previous assumptions about its frozen state and positioning it as a potential ocean world alongside other icy moons. Phys.Org reports: Among the moons in the solar system, Miranda stands out. The few images Voyager 2 captured in 1986 show Miranda's southern hemisphere (the only part we've seen) is a Frankenstein-like hodgepodge of grooved terrain quartered off by rough scarps and cratered areas, like squares on a quilt. Most researchers suspect these bizarre structures are the result of tidal forces and heating within the moon. Caleb Strom, a graduate student at the University of North Dakota who worked with Nordheim and Alex Patthoff of the Planetary Science Institute in Arizona, revisited the Voyager 2 images. The team set out to explain Miranda's enigmatic geology by reverse engineering the surface features, working backward to uncover what the moon's interior structure must have been to shape the moon's geology in response to tidal forcing.

After first mapping the various surface features like cracks, ridges and Miranda's unique trapezoidal coronae, the team developed a computer model to test several possible structures of the moon's interior, matching the predicted stress patterns to the actual surface geology. The setup that produced the best match between predicted stress patterns and observed surface features required the existence of vast ocean beneath Miranda's icy surface some 100-500 million years ago. This subsurface ocean was at least 62 miles (100 kilometers) deep, according to the study, and hidden beneath an icy crust no more than 19 miles (30 kilometers) thick. Given Miranda has a radius of just 146 miles (235 kilometers), the ocean would have filled almost half of the moon's body. "That result was a big surprise to the team," Strom said.

Key to creating that ocean, the researchers believe, were tidal forces between Miranda and nearby moons. These regular gravitational tugs can be amplified by orbital resonances -- a configuration where each moon's period around a planet is an exact integer of the others' periods. Jupiter's moons Io and Europa, for example, have a 2:1 resonance: For every two orbits Io makes around Jupiter, Europa makes exactly one, leading to tidal forces that are known to sustain an ocean beneath Europa's surface. These orbital configurations and the resulting tidal forces deform the moons like rubber balls, leading to friction and heat that keeps interiors warm. This also creates stresses that crack the surface, creating a rich tapestry of geologic features. Numerical simulations have suggested that Miranda and its neighboring moons likely had such a resonance in the past, offering a potential mechanism that could have warmed Miranda's interior to produce and maintain a subsurface ocean.

At some point, the moons' orbital ballet desynchronized, slowing the heating process so that the moon's insides started to cool and solidify. But the team doesn't think Miranda's interior has fully frozen yet. If the ocean had completely frozen, Nordheim explained, it would have expanded and caused certain telltale cracks on the surface, which aren't there. This suggests that Miranda is still cooling -- and may have an ocean beneath its surface even now. Miranda's modern-day ocean is probably relatively thin, Strom noted. "But the suggestion of an ocean inside one of the most distant moons in the solar system is remarkable," he said. Miranda wasn't predicted to have an ocean. With its small size and old age, scientists thought it would likely be a frozen ball of ice. Any leftover heat from its formation was assumed to have dissipated long ago. But as Patthoff pointed out, predictions about ice moons can be wrong, as evidenced by Saturn's moon Enceladus. The study has been published in The Planetary Science Journal.

"We passed Berkeley air — just outdoor air — into the material to see how it would perform," says U.C. Berkeley chemistry professor Omar Yaghi, "and it was beautiful.

"It cleaned the air entirely of CO2," Yaghi says in an announcement from the university. "Everything."

SFGate calls it "a discovery that could help potentially mitigate the effects of climate change..." Yaghi's lab has worked on carbon capture since the 1990s and began work on these crystalline structures in 2005. The innovative substance has lots of tiny holes, making it "great for storing gases or liquids, much like a sponge holds water," Yaghi said... While it could take one to two years for the powder to be usable in large-scale applications, Yaghi co-founded Atoco, an Irvine company, to commercialize his research and expand it beyond just carbon capture and storage.
"Capturing carbon from the air just got easier," says the headline on the anouncement from the university, which explains why this technology is crucial: [T]oday's carbon capture technologies work well only for concentrated sources of carbon, such as power plant exhaust. The same methods cannot efficiently capture carbon dioxide from ambient air, where concentrations are hundreds of times lower than in flue gases. Yet direct air capture, or DAC, is being counted on to reverse the rise of CO2 levels, which have reached 426 parts per million, 50% higher than levels before the Industrial Revolution. Without it, according to the Intergovernmental Panel on Climate Change, we won't reach humanity's goal of limiting warming to 1.5 degreesC (2.7 degreesF) above preexisting global averages.

A new type of absorbing material developed by chemists at the University of California, Berkeley, could help get the world to negative emissions... According to Yaghi, the new material could be substituted easily into carbon capture systems already deployed or being piloted to remove CO2 from refinery emissions and capture atmospheric CO2 for storage underground. UC Berkeley graduate student Zihui Zhou, the paper's first author, said that a mere 200 grams of the material, a bit less than half a pound, can take up as much CO2 in a year — 20 kilograms (44 pounds) — as a tree.
Their research was published this week in the journal Nature.

And it's also interesting that they're using AI, according to the university's announcement: Yaghi is optimistic that artificial intelligence can help speed up the design of even better COFs and MOFs for carbon capture or other purposes, specifically by identifying the chemical conditions required to synthesize their crystalline structures. He is scientific director of a research center at UC Berkeley, the Bakar Institute of Digital Materials for the Planet (BIDMaP), which employs AI to develop cost-efficient, easily deployable versions of MOFs and COFs to help limit and address the impacts of climate change. "We're very, very excited about blending AI with the chemistry that we've been doing," he said.
Another potential use could be for harvesting water from desert air for drinking water, Yaghi told SFGate. But he seems very focused specifically on carbon capture.

"Another thing is that we need a strong determination among officials and industries to make carbon capture a high priority. Things have to change, but I believe that direct carbon capture from air is very doable."

The Wall Street Journal reports on a "suspicious fleet of unidentified aircraft... as many as a dozen or more" that appeared in Virginia 10 months ago "over an area that includes the home base for the Navy's SEAL Team Six and Naval Station Norfolk, the world's largest naval port." The article notes this was just 10 months after the U.S. shot down a Chinese spy balloon...

After watching the drones — some "roughly 20 feet long and flying at more than 100 miles an hour" — there were weeks of meetings where "Officials from agencies including the Defense Department, Federal Bureau of Investigation and the Pentagon's UFO office joined outside experts to throw out possible explanations as well as ideas about how to respond..." Federal law prohibits the military from shooting down drones near military bases in the U.S. unless they pose an imminent threat. Aerial snooping doesn't qualify, though some lawmakers hope to give the military greater leeway...

Drone incursions into restricted airspace was already worrying national-security officials. Two months earlier, in October 2023, five drones flew over a government site used for nuclear-weapons experiments. The Energy Department's Nevada Nuclear Security Site outside Las Vegas detected four of the drones over three days. Employees spotted a fifth. U.S. officials said they didn't know who operated the drones in Nevada, a previously unreported incursion, or for what reason. A spokeswoman said the facility has since upgraded a system to detect and counter drones...

Over 17 days, the [Virginia] drones arrived at dusk, flew off and circled back... They also were nearly impossible to track, vanishing each night despite a wealth of resources deployed to catch them. Gen. Glen VanHerck, at the time commander of the U.S. Northern Command and the North American Aerospace Defense Command, said drones had for years been spotted flying around defense installations. But the nightly drone swarms over Langley [Air Force base], he said, were unlike any past incursion...

Analysts learned that the smaller quadcopters didn't use the usual frequency band available for off-the-shelf commercial drones — more evidence that the drone operators weren't hobbyists.
"Langley officials canceled nighttime training missions, worried about potential collisions with the drone swarm, and moved the F-22 jet fighters to another base... On December 23, the drones made their last visit."

But toward the end of the article, it notes that "In January, authorities found a clue they hoped would crack the case." It was a student at the University of Minnesota named Fengyun Shi — who was reported flying a drone on a rainy morning near a Virginia shipyard that builds nuclear submarines and aircraft carriers. Their drone got stuck in a tree, and ended up with federal investigators who found "Shi had photographed Navy vessels in dry dock, including shots taken around midnight. Some were under construction at the nearby shipyard." On Jan. 18, federal agents arrested Shi as he was about to board a flight to China on a one-way ticket. Shi told FBI agents he was a ship enthusiast and hadn't realized his drone crossed into restricted airspace. Investigators weren't convinced. but found no evidence linking him to the Chinese government. They learned he had bought the drone on sale at a Costco in San Francisco the day before he traveled to Norfolk. U.S. prosecutors charged Shi with unlawfully taking photos of classified naval installations, the first case involving a drone under a provision of U.S. espionage law. The 26-year-old Chinese national pleaded guilty and appeared in federal court in Norfolk on Oct. 2 for sentencing. Magistrate Judge Lawrence Leonard said he didn't believe Shi's story — that he had been on vacation and was flying drones in the middle of the night for fun. "There's significant holes," the judge said in court.

"If he was a foreign agent, he would be the worst spy ever known," said Shi's attorney, Shaoming Cheng. "I'm sorry about what happened in Norfolk," Shi said before he was sentenced to six months in federal prison.
But "U.S. officials have yet to determine who flew the Langley drones or why..."

"U.S. officials confirmed this month that more unidentified drone swarms were spotted in recent months near Edwards Air Force Base, north of Los Angeles."

Scientific American has surprising news about the possibility of black holes the size of an atom but containing the mass of an asteroid — the so-called "primordial black holes" formed after the birth of the universe which could solve the ongoing mystery of the missing dark matter.

These atom-sized black holes "may fly through the inner solar system about once a decade, scientists say... And if they sneak by the moon or Mars, scientists should be able to detect them, a new study shows." If one of these black holes comes near a planet or large moon, it should push the body off course enough to be measurable by current instruments. "As it passes by, the planet starts to wobble," says Sarah R. Geller, a theoretical physicist now at the University of California, Santa Cruz, and co-author of the study, which was published on September 17 in Physical Review D. "The wobble will grow over a few years but eventually it will damp out and go back to zero."

Study team member Tung X. Tran, then an undergraduate student at the Massachusetts Institute of Technology, built a computer model of the solar system to see how the distance between Earth and nearby solar system objects would change after a black hole flyby. He found that such an effect would be most noticeable for Mars, whose distance scientists know within about 10 centimeters. For a black hole in the middle of the mass range, "we found that after three years the signal would grow to between one to three meters," Tran says. "That's way above the threshold of precision that we can measure." The Earth-Mars distance is particularly well tracked because scientists have been sending generations of probes and landers to the Red Planet...

In a coincidence, an independent team published a paper about its search for signs of primordial black holes flying near Earth in the same issue of Physical Review D. The researchers' simulations found that such signals could be detectable in orbital data from Global Navigation Satellite Systems, as well as gravimeters that measure variations in Earth's gravitational field.
"For decades physicists thought dark matter was likely to take the form of so-called weakly interacting massive particles (WIMPs)," the article points out. "Yet generations of ever more sensitive experiments meant to find these particles have come up empty."

California astrophysicist Kevork Abazajian tells the site that now in the scientific community, "Primordial black holes are really gaining popularity."

St. Cloud State University announced plans to eliminate its music department and cut 42 degree programs and 50 minors, as part of a broader trend of U.S. colleges slashing offerings amid financial pressures. The Minnesota school's decision, driven by a $32 million budget shortfall over two years, reflects challenges facing higher education institutions nationwide. Similar program cuts have been announced at universities across the country, including in North Carolina, Arkansas, and New York. Some smaller institutions have closed entirely, unable to weather the financial storm, reports CBS News.

Federal COVID relief funds have dried up, operational costs are rising, and fewer high school graduates are pursuing college degrees. St. Cloud State's enrollment plummeted from 18,300 students in fall 2020 to about 10,000 in fall 2023, mirroring national trends. The National Student Clearinghouse Research Center reports a decline in four-year college enrollment, despite a slight rebound in community college numbers.

Slashdot reader sciencehabit shared this report from Science magazine: One of the classic tropes of science fiction is terraforming Mars: warming up our cold neighbor so it could support human civilization. The idea might not be so far-fetched, research published today in Science Advances suggests...

Samaneh Ansari [a Ph.D. student at Northwestern University and lead author on the new study] and her colleagues wanted to test the heat-trapping abilities of a substance Mars holds in abundance: dust. Martian dust is rich in iron and aluminum, which give it its characteristic red hue. But its microscopic size and roughly spherical shape are not conducive to absorbing radiation or reflecting it back to the surface. So the researchers brainstormed a different particle: using the iron and aluminum in the dust to manufacture 9-micrometer-long rods, about twice as big as a speck of martian dust and smaller than commercially available glitter. Ansari designed a simulation to test how these theoretical particles would interact with light. She found "unexpectedly huge effects" in how they absorbed infrared radiation from the surface and how they scattered that radiation back down to Mars — key factors that determine whether an aerosol particle creates a greenhouse effect.

Collaborators at the University of Chicago and the University of Central Florida then fed the particles into computer models of Mars's climate. They examined the effect of annually injecting 2 million tons of the rods 10 to 100 meters above the surface, where they would be lofted to higher altitudes by turbulent winds and settle out of the atmosphere 10 times more slowly than natural Mars dust. Mars could warm by about 10 degreesC within a matter of months, the team found, despite requiring 5000 times less material than other proposed greenhouse gas schemes...

Still, "Increasing the temperature of the planet is just one of the things that we would need to do in order to live on Mars without any assistance," says Juan Alday, a postdoctoral planetary science researcher at the Open University not involved with the work. For one, the amount of oxygen in Mars's atmosphere is only 0.1%, compared with 21% on Earth. The pressure on Mars is also 150 times lower than on Earth, which would cause human blood to boil. And Mars has no ozone layer, which means there is no protection from the Sun's harmful ultraviolet radiation. What's more, even once warmed, martian soils may still be too salty or toxic to grow crops. In other words, McInnes says, upping the temperature "isn't some kind of magic switch" that would make Mars habitable.

That isn't stopping Ansari and her colleagues from investigating the possibilities.

"In a significant advancement for space technology, a team of UC Berkeley researchers, led by doctoral student Taylor Waddell, successfully launched a 3D printer into space," reports the university's student newspaper: As part of the Virgin Galactic 07 mission, the team sent a 3D printer named SpaceCAL to space to explore the potential of Computed Axial Lithography, or CAL, and additive manufacturing in space... During its 140-second flight in suborbital space, the SpaceCAL printer autonomously detected microgravity and printed four test parts: two space shuttles and two Benchies, or 3D-printed boats created to check the printer's accuracy, according to Sean Chu, a member of the team who worked on designing structures and mechanisms. Within the 140 seconds, the process involved multiple steps such as printing, post-washing, flushing with water and post-curing with light to fully solidify the parts.
But that's just the beginning, says the university's engineering department: To date, CAL has shown that it can successfully print with more than 60 different materials on Earth, such as silicones, glass composites and biomaterials. According to Waddell, this versatility could come in handy for both the cabin and the crew... "CAL is also capable of repairing the crew. We can print dental replacements, skin grafts or lenses, or things personalized in emergency medicine for astronauts, which is very important in these missions, too."

Someday, CAL may be used to print even more sophisticated parts, such as human organs. Lawrence Livermore National Lab has received a grant from NASA to test this technology on the International Space Station. "They're going to basically do bioprinting on the Space Station," said Waddell. "And the long, long-term goal is to print organs up in space with CAL, then bring them back down to Earth." Next, Waddell and his colleagues hope to begin work with NASA on developing and validating a single object that could support crew health and wellness, like a dental crown for an astronaut or a surgical wound closure tool...

This project was made possible through a $1.4 million grant and engineering support provided by NASA. In addition, Virgin Galactic played a pivotal role in taking this project to the next level.

Starting this fall, most students at Johns Hopkins' medical school will attend tuition-free thanks to a $1 billion donation from billionaire Mike Bloomberg. From a report: The generous gift is intended to address "twin challenges of declining levels of health and education," Bloomberg said in a letter Monday. The donation will cover the full cost of tuition for medical students from families earning less than $300,000, Bloomberg Industries announced Monday. It will also cover living expenses and other fees for students from families earning up to $175,000.

Currently, nearly two-thirds of medical students at the school qualify for financial aid. Johns Hopkins' medical students graduate with an average student loan debt of about $104,000. The donation will also increase financial aid at some of the university's other graduate schools, including the schools of nursing and public health.

Longtime Slashdot reader regoli shares an obituary from the Wall Street Journal: When Alan Ashton was a computer-science professor at Brigham Young University in the mid-1970s, the director of the school's marching band knocked on his door and said he wanted to use a computer to choreograph the band's halftime shows. Ashton was easily persuaded; he was a trumpet player whose Ph.D. dissertation at the University of Utah was "Electronics, music and computers." Bruce Bastian, the graduate student who was working as BYU's marching-band director, turned out to be a quick learner. "He was very conscientious, very thorough," Ashton said in an interview, "and just absolutely brilliant." Within a few years, the two were at work on a program that would turn them into two of the richest people in the nation, founders of the company that made WordPerfect, the dominant word-processing software in the 1980s and early '90s and one of the first pieces of software many Americans bought when they brought home their first PCs.

But behind the hundreds of millions of dollars and blockbuster success, Bastian's personal life, he later said, was in "free fall." Between the time he and Ashton released what would later be known as WordPerfect to the public in 1980 and when they sold the company for $1.4 billion in 1994, Bastian told his wife, four sons and his Mormon community that he was gay and leaving both his marriage and the church. When he died, June 16, at the age of 76 from complications associated with pulmonary fibrosis, he had been living a different life: A longtime advocate for LGBTQ rights, Bastian was married to a man, and had found a way to maintain relationships with his family, who remained dedicated members of the church that rejected his sexual orientation. "I kind of have three parts of my life," he said in 2010 during one of several extensive interviews he gave to the Mormon Stories podcast, "the pre-WordPerfect life, the WordPerfect years, and now the LGBT years." Other publications remembering Bruce Bastian include: The New York Times, The Salt Lake Tribune, University of Utah, and Human Rights Campaign.

Exam submissions generated by AI can not only evade detection but also earn higher grades than those submitted by university students, a real-world test has shown. From a report: The findings come as concerns mount about students submitting AI-generated work as their own, with questions being raised about the academic integrity of universities and other higher education institutions. It also shows even experienced markers could struggle to spot answers generated by AI, the University of Reading academics said.

Peter Scarfe, an associate professor at Reading's School of Psychology and Clinical Language Sciences said the findings should serve as a "wake-up call" for educational institutions as AI tools such as ChatGPT become more advanced and widespread. He said: "The data in our study shows it is very difficult to detect AI-generated answers. There has been quite a lot of talk about the use of so-called AI detectors, which are also another form of AI but (the scope here) is limited." For the study, published in the journal Plos One, Prof Scarfe and his team generated answers to exam questions using GPT-4 and submitted these on behalf of 33 fake students. Exam markers at Reading's School of Psychology and Clinical Language Sciences were unaware of the study. Answers submitted for many undergraduate psychology modules went undetected in 94% of cases and, on average, got higher grades than real student submissions, Prof Scarfe said.

Where is dark matter, the invisible masses which must exist to bind galaxies together? Stephen Hawking postulated they could be hiding in "primordial" black holes formed during the big bang, writes CNN.

"Now, a new study by researchers with the Massachusetts Institute of Technology has brought the theory back into the spotlight, revealing what these primordial black holes were made of and potentially discovering an entirely new type of exotic black hole in the process." Other recent studies have confirmed the validity of Hawking's hypothesis, but the work of [MIT graduate student Elba] Alonso-Monsalve and [study co-author David] Kaiser, a professor of physics and the Germeshausen Professor of the History of Science at MIT, goes one step further and looks into exactly what happened when primordial black holes first formed. The study, published June 6 in the journal Physical Review Letters, reveals that these black holes must have appeared in the first quintillionth of a second of the big bang: "That is really early, and a lot earlier than the moment when protons and neutrons, the particles everything is made of, were formed," Alonso-Monsalve said... "You cannot find quarks and gluons alone and free in the universe now, because it is too cold," Alonso-Monsalve added. "But early in the big bang, when it was very hot, they could be found alone and free. So the primordial black holes formed by absorbing free quarks and gluons."

Such a formation would make them fundamentally different from the astrophysical black holes that scientists normally observe in the universe, which are the result of collapsing stars. Also, a primordial black hole would be much smaller — only the mass of an asteroid, on average, condensed into the volume of a single atom. But if a sufficient number of these primordial black holes did not evaporate in the early big bang and survived to this day, they could account for all or most dark matter.

During the making of the primordial black holes, another type of previously unseen black hole must have formed as a kind of byproduct, according to the study. These would have been even smaller — just the mass of a rhino, condensed into less than the volume of a single proton... "It's inevitable that these even smaller black holes would have also formed, as a byproduct (of primordial black holes' formation)," Alonso-Monsalve said, "but they would not be around today anymore, as they would have evaporated already." However, if they were still around just ten millionths of a second into the big bang, when protons and neutrons formed, they could have left observable signatures by altering the balance between the two particle types.
Professer Kaiser told CNN the next generation of gravitational detectors "could catch a glimpse of the small-mass black holes — an exotic state of matter that was an unexpected byproduct of the more mundane black holes that could explain dark matter today."

Nico Cappelluti, an assistant professor in the physics department of the University of Miami (who was not involved with the study) confirmed to CNN that "This work is an interesting, viable option for explaining the elusive dark matter."