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Math

Pythagoras Was Wrong: There Are No Universal Musical Harmonies, Study Finds (cam.ac.uk) 73

An anonymous reader shares a report: According to the Ancient Greek philosopher Pythagoras, 'consonance' -- a pleasant-sounding combination of notes -- is produced by special relationships between simple numbers such as 3 and 4. More recently, scholars have tried to find psychological explanations, but these 'integer ratios' are still credited with making a chord sound beautiful, and deviation from them is thought to make music 'dissonant,' unpleasant sounding.

But researchers from the University of Cambridge, Princeton and the Max Planck Institute for Empirical Aesthetics, have now discovered two key ways in which Pythagoras was wrong. Their study, published in Nature Communications, shows that in normal listening contexts, we do not actually prefer chords to be perfectly in these mathematical ratios. "We prefer slight amounts of deviation. We like a little imperfection because this gives life to the sounds, and that is attractive to us," said co-author, Dr Peter Harrison, from Cambridge's Faculty of Music and Director of its Centre for Music and Science.

The researchers also found that the role played by these mathematical relationships disappears when you consider certain musical instruments that are less familiar to Western musicians, audiences and scholars. These instruments tend to be bells, gongs, types of xylophones and other kinds of pitched percussion instruments. In particular, they studied the 'bonang,' an instrument from the Javanese gamelan built from a collection of small gongs.

Science

Two Nights of Broken Sleep Can Make People Feel Years Older, Finds Study (theguardian.com) 43

Two nights of broken sleep are enough to make people feel years older, according to researchers, who said consistent, restful slumber was a key factor in helping to stave off feeling one's true age. From a report: Psychologists in Sweden found that, on average, volunteers felt more than four years older when they were restricted to only four hours of sleep for two consecutive nights, with some claiming the sleepiness made them feel decades older. The opposite was seen when people were allowed to stay in bed for nine hours, though the effect was more modest, with participants in the study claiming to feel on average three months younger than their real age after ample rest.

"Sleep has a major impact on how old you feel and it's not only your long-term sleep patterns," said Dr Leonie Balter, a psychoneuroimmunologist at the Karolinska Institute in Stockholm and first author on the study. "Even when you only sleep less for two nights that has a real impact on how you feel." Beyond simply feeling more decrepit, the perception of being many years older may affect people's health, Balter said, by encouraging unhealthy eating, reducing physical exercise, and making people less willing to socialise and engage in new experiences.

Moon

Astronomers Demand Radio Silence at the Moon's Far Side, But Resistance May Be Futile (gizmodo.com) 18

Gizmodo reports that increased activity on the Moon "may affect the unique radio silence on the lunar far side, an ideal location for radio telescopes to pick up faint signals from the cosmic past." This week, the International Academy of Astronautics (IAA) held the first Moon Farside Protection Symposium in Italy to advocate for preserving radio silence on the far side of the Moon. The symposium hopes to raise awareness about the threat facing the far side of the Moon and develop approaches to shielding it from artificial radio emissions....

NASA has shown interest in using the lunar radio silence, proposing an ultra-long-wavelength radio telescope inside a crater on the far side of the Moon. The Lunar Crater Radio Telescope is designed to observe the universe at frequencies below 30 megahertz, which are largely unexplored by humans since those signals are reflected by the Earth's ionosphere, according to NASA. At those low frequencies, radio telescopes on the Moon can detect near-Earth objects approaching our planet before other observatories, it can search for signals of alien civilizations, and study organic molecules in interstellar space...

As more missions head towards the Moon, however, that perfect silence is increasingly being compromised. Earlier this week, for example, China launched a satellite to relay communication between ground operations on Earth and an upcoming mission on the far side of the Moon. The satellite, Queqiao-2, is the first of a constellation of satellites that China hopes to deploy by 2040 to communicate with future crewed missions on the Moon and Mars. As part of its Artemis program, NASA is aiming to build the Lunar Gateway, a space station designed to orbit the Moon to support future missions to the lunar surface and Mars. In advance of this, a NASA-funded cubesat, called CAPSTONE, has entered into a unique halo orbit to demonstrate the stability and practicality of this trajectory for future lunar missions... CAPSTONE marks the beginning of something big — establishing a permanent communication link between Earth and lunar assets, and ensuring the steady, uninterrupted flow of data.

NASA and its Chinese counterparts have eerily similar plans for lunar exploration, and the Moon is currently a 'free-for-all' with no regulations set in place as to who can own our dusty orbital companion.

"In other words, things are about to get real loud out there as far as radio transmissions are concerned."
Science

Pregnancy May Increase Biological Age 2 Years - But Some End Up 'Younger' (science.org) 29

Slashdot reader sciencehabit shared this report from Science magazine: Nurturing a growing fetus requires a series of profound physical, hormonal, and chemical changes that may rewire every major organ in the body and can cause serious health complications such as hypertension and preeclampsia. But does being pregnant actually take years off your life...?

Today in Cell Metabolism, scientists report that the stress of pregnancy can cause a person's biological age to increase by up to 2 years — a trend that may reverse itself in the months that follow. In some cases, the authors write, those who breastfeed their children after giving birth may end up biologically "younger" than during early pregnancy. The finding represents yet another piece of "compelling" evidence that events during and after pregnancy can have far-reaching health consequences, says Elizabeth Bertone-Johnson, an epidemiologist at the University of Massachusetts Amherst who wasn't involved in the new study...

The discovery that biological aging isn't necessarily a linear process "came as a real surprise," says Kieran O'Donnell, a perinatal researcher at the Yale School of Medicine... But blood samples from 68 participants, collected 3 months after giving birth, revealed a dramatic about-face. Although being pregnant had initially aged their cells between 1 and 2 years, says O'Donnell, their biological age now appeared to be 3 to 8 years younger than it had been during early pregnancy — with different epigenetic clocks algorithms providing slightly bigger or smaller estimates.

AI

AI Surpasses Doctors In Spotting Early Breast Cancer Signs In NHS Trial 57

An AI tool named Mia, tested by the NHS, successfully detected signs of breast cancer in 11 women which had been missed by human doctors. The BBC reports: The tool, called Mia, was piloted alongside NHS clinicians and analyzed the mammograms of over 10,000 women. Most of them were cancer-free, but it successfully flagged all of those with symptoms, as well as an extra 11 the doctors did not identify. At their earliest stages, cancers can be extremely small and hard to spot. The BBC saw Mia in action at NHS Grampian, where we were shown tumors that were practically invisible to the human eye. But, depending on their type, they can grow and spread rapidly.

Barbara was one of the 11 patients whose cancer was flagged by Mia but had not been spotted on her scan when it was studied by the hospital radiologists. Because her 6mm tumor was caught so early she had an operation but only needed five days of radiotherapy. Breast cancer patients with tumors which are smaller than 15mm when discovered have a 90% survival rate over the following five years. Barbara said she was pleased the treatment was much less invasive than that of her sister and mother, who had previously also battled the disease. Without the AI tool's assistance, Barbara's cancer would potentially not have been spotted until her next routine mammogram three years later. She had not experienced any noticeable symptoms.
"These results are encouraging and help to highlight the exciting potential AI presents for diagnostics. There is no question that real-life clinical radiologists are essential and irreplaceable, but a clinical radiologist using insights from validated AI tools will increasingly be a formidable force in patient care." said Dr Katharine Halliday, President of the Royal College of Radiologists.
Medicine

More Than Half of Chickenpox Diagnoses Are Wrong, Study Finds (arstechnica.com) 52

An anonymous reader shares a report: Thanks to the vaccination program that began in 1995, chickenpox is now relatively rare. Cases of the miserable, itchy condition have fallen more than 97 percent. But, while children have largely put the oatmeal baths and oven mitts behind them, doctors have apparently let their diagnostic skills get a little crusty. According to a study published Thursday, public health researchers in Minnesota found that 55 percent of people diagnosed with chickenpox based on their symptoms were actually negative for the varicella-zoster virus, the virus that causes chickenpox. The study noted that the people were all diagnosed in person by health care providers in medical facilities. But, instead of chickenpox, lab testing showed that some of the patients were actually infected with an enterovirus, which can cause a rash, or the herpes simplex virus 1, which causes cold sores.

The study, published in the Centers for Disease Control and Prevention's Morbidity and Mortality Weekly Report, supports expanding laboratory testing for suspected chickenpox cases in the state's program and highlights that diagnoses based on symptoms are "unreliable." For one thing, doctors simply see far fewer chickenpox cases these days because of the protection from vaccines. While chickenpox cases in the US previously reached 4 million each year, with 10,500 to 13,500 hospitalizations and 100 to 150 deaths, there are now fewer than 150,000 cases,1,400 hospitalizations, and 30 deaths each year, the CDC reports. Vaccination is more than 90 percent effective at preventing the disease. In the rare cases where a vaccinated person contracts chickenpox, the muted rashes are challenging to identify by eye. But even in unvaccinated children, chickenpox can be tricky to pick out; it can easily be confused with measles, insect bites, enterovirus, skin infections such as scabies and impetigo, herpes viruses, and hand, foot, and mouth disease.

Earth

Geologists Reject Declaration of Anthropocene Epoch (theguardian.com) 41

The guardians of the world's official geological timescale have firmly rejected a proposal to declare an Anthropocene epoch, after an epic academic row. From a report: The proposal would have designated the period from 1952 as the Anthropocene to reflect the planet-changing impact of humanity. It would have ended the Holocene epoch, the 11,700 years of stable climate since the last ice age and during which human civilisation arose. The International Union of Geological Sciences (IUGS) has announced, however, that geologists have rejected the idea in a series of votes. Those objecting noted a much longer history of human impacts on Earth, including the dawn of agriculture and the industrial revolution, and unease about including a new unit in the geological timescale with a span of less than less than a single human lifetime, it said. Most units span thousands or millions of years.

It also acknowledged: "The Anthropocene as a concept will continue to be widely used not only by Earth and environmental scientists, but also by social scientists, politicians and economists, as well as by the public at large. As such, it will remain an invaluable descriptor in human-environment interactions." The Anthropocene working group (AWG), which was formed by the Subcommission on Quaternary Stratigraphy (SQS), in turn part of the IUGS, took 15 years to develop the proposal. It concluded that the radioactive isotopes spread worldwide by hydrogen bomb tests were the best marker of humanity's transformation of the planet. Geological time units also need a specific location to typify the unit and the Crawford sinkhole lake in Canada was chosen.

Science

First Human Transplant of a Genetically Modified Pig Kidney Performed (npr.org) 46

For the first time, surgeons have transplanted a kidney from a genetically modified pig into a living person, doctors in Boston said Thursday. From a report: Richard Slayman, 62, of Weymouth, Mass., who is suffering from end-stage kidney disease, received the organ Saturday in a four-hour procedure, Massachusetts General Hospital announced. He is recovering well and is expected to be discharged soon, the hospital said. "I saw it not only as a way to help me, but a way to provide hope for the thousands of people who need a transplant to survive," Slayman said in a statement released by the hospital.

The procedure is the latest development in a fast-moving race to create genetically modified pigs to provide kidneys, livers, hearts and other organs to help alleviate the shortage of organs for people who need transplants. "Our hope is that this transplant approach will offer a lifeline to millions of patients worldwide who are suffering from kidney failure," said Dr. Tatsuo Kawai, the hospital's director for clinical transplant tolerance, in the hospital statement.

Several biotech companies are racing to develop a supply of cloned pigs whose DNA has been genetically modified so they won't be rejected by the human body, spread pig viruses to people or cause other complications. NPR recently got exclusive access to a research farm breeding these animals for a company in this competition, Revivicor Inc. of Blacksburg, Va. The kidney transplanted in Boston came from a pig created by eGenesis of Cambridge, Mass. The eGenesis pigs are bred with 69 genetic modifications to prepare organs for human transplantation. The changes protect against a virus known to infect pigs as well as delete pig genes and add human genes to make the organs compatible with people.

Science

Superconductor Scientist Engaged in Research Misconduct, Probe Finds (wsj.com) 22

A physicist who shot to fame with claims of the discovery of a room-temperature superconductor engaged in research misconduct, a committee tapped to examine his work has concluded after a monthslong investigation. From a report: Ranga Dias, a physicist at the University of Rochester in New York, has had at least four papers he co-wrote, including three involving superconductivity, retracted in the past 18 months by the journals that published them. A committee of outside experts tapped by the university "identified data-reliability concerns in those papers," a Rochester spokesperson told The Wall Street Journal. "The committee concluded, in accordance with university policy and federal regulations, that Dias engaged in research misconduct," the spokesperson said in an emailed statement.

The work in the papers was funded by the National Science Foundation, the Energy Department, and the Gordon and Betty Moore Foundation, a private organization that funds scientific research. The Moore foundation discontinued its grant late last year, the organization said. Of the $1.6 million award, about $285,000 was spent. The university refunded the rest. The investigation follows three preliminary reviews by the university of one of the studies, published in Nature in 2020 and retracted in 2022 after criticism from other scientists. Those inquiries didn't find enough evidence to prompt a full investigation. Complaints sent to the university in spring 2023 about additional studies prompted a more thorough review. That investigation was completed by March this year, resulting in the misconduct finding. The journal Nature reported earlier this month that this investigation was complete.

Biotech

Neuralink Shows First Brain-Chip Patient Playing Online Chess Using His Mind 52

Neuralink, the brain-chip startup founded by Elon Musk, showed its first patient using his mind to play online chess. Reuters reports: Noland Arbaugh, the 29-year-old patient who was paralyzed below the shoulder after a diving accident, played chess on his laptop and moved the cursor using the Neuralink device. The implant seeks to enable people to control a computer cursor or keyboard using only their thoughts. Arbaugh had received an implant from the company in January and could control a computer mouse using his thoughts, Musk said last month.

"The surgery was super easy," Arbaugh said in the video streamed on Musk's social media platform X, referring to the implant procedure. "I literally was released from the hospital a day later. I have no cognitive impairments. I had basically given up playing that game," Arbaugh said, referring to the game Civilization VI, "you all (Neuralink) gave me the ability to do that again and played for 8 hours straight."

Elaborating on his experience with the new technology, Arbaugh said that it is "not perfect" and they "have run into some issues." "I don't want people to think that this is the end of the journey, there's still a lot of work to be done, but it has already changed my life," he added.
Space

Physicist Claims Universe Has No Dark Matter and Is Twice As Old As We Thought (sciencealert.com) 243

schwit1 shares a report from ScienceAlert: Sound waves fossilized in the maps of galaxies across the Universe could be interpreted as signs of a Big Bang that took place 13 billion years earlier than current models suggest. Last year, theoretical physicist Rajendra Gupta from the University of Ottawa in Canada published a rather extraordinary proposal that the Universe's currently accepted age is a trick of the light, one that masks its truly ancient state while also ridding us of the need to explain hidden forces. Gupta's latest analysis suggests oscillations from the earliest moments in time preserved in large-scale cosmic structures support his claims. "The study's findings confirm that our previous work about the age of the Universe being 26.7 billion years has allowed us to discover that the Universe does not require dark matter to exist," says Gupta. "In standard cosmology, the accelerated expansion of the Universe is said to be caused by dark energy but is in fact due to the weakening forces of nature as it expands, not due to dark energy." [...]

Current cosmological models make the reasonable assumption that certain forces governing the interactions of particles have remained constant throughout time. Gupta challenges a specific example of this 'coupling constant', asking how it might affect the spread of space over exhaustively long periods of time. It's hard enough for any novel hypothesis to survive the intense scrutiny of the scientific community. But Gupta's suggestion isn't even entirely new -- it's loosely based on an idea that was shown the door nearly a century ago. In the late 1920s, Swiss physicist Fritz Zwicky wondered if the reddened light of far distant objects was a result of lost energy, like a marathon runner exhausted by a long journey across the eons of space. His 'tired light' hypothesis was in competition with the now-accepted theory that light's red-shifted frequency is due to the cumulative expansion of space tugging at light waves like a stretched spring.

The consequences of Gupta's version of the tired light hypothesis -- what is referred to as covarying coupling constants plus tired light, or CCC+TL -- would affect the Universe expansion, doing away with mysterious pushing forces of dark energy and blaming changing interactions between known particles for the increased stretching of space. To replace existing models with CCC+TL, Gupta would need to convince cosmologists his model does a better job of explaining what we see at large. His latest paper attempts to do that by using CCC+TL to explain fluctuations in the spread of visible matter across space caused by sound waves in a newborn Universe, and the glow of ancient dawn known as the cosmic microwave background. While his analysis concludes his hybrid tired light theory can play nicely with certain features of the Universe's residual echoes of light and sound, it does so only if we also ditch the idea that dark matter is also a thing.
The research has been published in The Astrophysical Journal.
EU

Europe Turns To the Falcon 9 To Launch Its Navigation Satellites 93

The European Union has agreed to launch four Galileo navigation satellites on SpaceX's Falcon 9 rocket at a 30 percent premium over the standard launch price. Ars Technica reports: According to Politico, the security agreement permits staff working for the EU and European Space Agency to have access to the launch pad at all times and, should there be a mishap with the mission, the first opportunity to retrieve debris. With the agreement, final preparations can begin for two launches of two satellites each, on the Falcon 9 rocket from Florida. These Galileo missions will occur later this year. The satellites, which each weigh about 700 kg, will be launched into an orbit about 22,000 km above the planet.

The heightened security measures are due to the proprietary technology incorporated into the satellites, which cost hundreds of millions of euros to build; they perform a similar function to US-manufactured Global Positioning System satellites. The Florida launches will be the first time Galileo satellites, which are used for civilian and military purposes, have been exported outside of European territory. Due to the extra overhead related to the national security mission, the European Union agreed to pay 180 million euros for the two launches, or about $196 million. This represents about a 30 percent premium over the standard launch price of $67 million for a Falcon 9 launch.
Over the past two years, the European Space Agency (ESA) had to rely on SpaceX for several launches, including significant projects like the Euclid space telescope and other ESA satellites, due to the cessation of collaborations with Roscosmos after the invasion of Ukraine and delays in the Ariane 6 rocket's development. With the Ariane 5 retired and no immediate replacement, Europe's access to space was compromised.

That said, the Ariane 6 is working towards a launch window in the coming months, promising a return to self-reliance for ESA with a packed schedule of missions ahead.
Medicine

Intermittent Fasting Linked To Higher Risk of Cardiovascular Death, Research Suggests (nbcnews.com) 107

Several readers shared the following report: Intermittent fasting, a diet pattern that involves alternating between periods of fasting and eating, can lower blood pressure and help some people lose weight, past research has indicated. But an analysis presented Monday at the American Heart Association's scientific sessions in Chicago challenges the notion that intermittent fasting is good for heart health. Instead, researchers from Shanghai Jiao Tong University School of Medicine in China found that people who restricted food consumption to less than eight hours per day had a 91% higher risk of dying from cardiovascular disease over a median period of eight years, relative to people who ate across 12 to 16 hours.

It's some of the first research investigating the association between time-restricted eating (a type of intermittent fasting) and the risk of death from cardiovascular disease. The analysis -- which has not yet been peer-reviewed or published in an academic journal -- is based on data from the Centers for Disease Control and Prevention's National Health and Nutrition Examination Survey collected between 2003 and 2018. The researchers analyzed responses from around 20,000 adults who recorded what they ate for at least two days, then looked at who had died from cardiovascular disease after a median follow-up period of eight years. However, Victor Wenze Zhong, a co-author of the analysis, said it's too early to make specific recommendations about intermittent fasting based on his research alone.

NASA

Astronaut Thomas Stafford, Commander of Apollo 10, Dies At 93 (apnews.com) 29

The Associated Press reports on the passing of astronaut Thomas P. Stafford, the commander of a dress rehearsal flight for the 1969 moon landing and the first U.S.-Soviet space linkup. He was 93. From the report: Stafford, a retired Air Force three-star general, took part in four space missions. Before Apollo 10, he flew on two Gemini flights, including the first rendezvous of two U.S. capsules in orbit. He died in a hospital near his Space Coast Florida home, said Max Ary, director of the Stafford Air & Space Museum in Weatherford, Oklahoma. Stafford was one of 24 NASA astronauts who flew to the moon, but he did not land on it. Only seven of them are still alive. After he put away his flight suit, Stafford was the go-to guy for NASA when it sought independent advice on everything from human Mars missions to safety issues to returning to flight after the 2003 space shuttle Columbia accident. He chaired an oversight group that looked into how to fix the then-flawed Hubble Space Telescope, earning a NASA public service award.

"Tom was involved in so many things that most people were not aware of, such as being known as the 'Father of Stealth,'" Ary said in an email. Stafford was in charge of the famous 'Area 51' desert base that was the site of many UFO theories, but the home of testing of Air Force stealth technologies. The Apollo 10 mission in May 1969 set the stage for Apollo 11's historic mission two months later. Stafford and Gene Cernan took the lunar lander nicknamed Snoopy within 9 miles (14 kilometers) of the moon's surface. Astronaut John Young stayed behind in the main spaceship dubbed Charlie Brown. "The most impressive sight, I think, that really changed your view of things is when you first see Earth," Stafford recalled in a 1997 oral history, talking about the view from lunar orbit. Then came the moon's far side: "The Earth disappears. There's this big black void." Apollo 10's return to Earth set the world's record for fastest speed by a crewed vehicle at 24,791 mph (39,897 kph).

After the moon landings ended, NASA and the Soviet Union decided on a joint docking mission and Stafford, a one-star general at the time, was chosen to command the American side. It meant intensive language training, being followed by the KGB while in the Soviet Union, and lifelong friendships with cosmonauts. The two teams of space travelers even went to Disney World and rode Space Mountain together before going into orbit and joining ships. "We have capture," Stafford radioed in Russian as the Apollo and Soyuz spacecraft hooked up. His Russian counterpart, Alexei Leonov, responded in English: "Well done, Tom, it was a good show. I vote for you." [...] The 1975 mission included two days during which the five men worked together on experiments. After, the two teams toured the world together, meeting President Gerald Ford and Soviet leader Leonid Brezhnev. "It helped prove to the rest of the world that two completely opposite political systems could work together," Stafford recalled at a 30th anniversary gathering in 2005. Later, Stafford was a central part of discussions in the 1990s that brought Russia into the partnership building and operating the International Space Station.

Government

EPA Bans Chrysotile Asbestos (apnews.com) 98

An anonymous reader quotes a report from the Associated Press: The Environmental Protection Agency on Monday announced a comprehensive ban on asbestos, a carcinogen that kills tens of thousands of Americans every year but is still used in some chlorine bleach, brake pads and other products. The final rule marks a major expansion of EPA regulation under a landmark 2016 law that overhauled regulations governing tens of thousands of toxic chemicals in everyday products, from household cleaners to clothing and furniture. The new rule would ban chrysotile asbestos, the only ongoing use of asbestos in the United States. The substance is found in products such as brake linings and gaskets and is used to manufacture chlorine bleach and sodium hydroxide, also known as caustic soda, including some that is used for water purification. [...]

The 2016 law authorized new rules for tens of thousands of toxic chemicals found in everyday products, including substances such as asbestos and trichloroethylene that for decades have been known to cause cancer yet were largely unregulated under federal law. Known as the Frank Lautenberg Chemical Safety Act, the law was intended to clear up a hodgepodge of state rules governing chemicals and update the Toxic Substances Control Act, a 1976 law that had remained unchanged for 40 years. The EPA banned asbestos in 1989, but the rule was largely overturned by a 1991 Court of Appeals decision that weakened the EPA's authority under TSCA to address risks to human health from asbestos or other existing chemicals. The 2016 law required the EPA to evaluate chemicals and put in place protections against unreasonable risks. Asbestos, which was once common in home insulation and other products, is banned in more than 50 countries, and its use in the U.S. has been declining for decades. The only form of asbestos known to be currently imported, processed or distributed for use in the U.S. is chrysotile asbestos, which is imported primarily from Brazil and Russia. It is used by the chlor-alkali industry, which produces bleach, caustic soda and other products. Most consumer products that historically contained chrysotile asbestos have been discontinued. While chlorine is a commonly used disinfectant in water treatment, there are only eight chlor-alkali plants in the U.S. that still use asbestos diaphragms to produce chlorine and sodium hydroxide. The plants are mostly located in Louisiana and Texas.

The use of asbestos diaphragms has been declining and now accounts for less than one-third of the chlor-alkali production in the U.S., the EPA said. The EPA rule will ban imports of asbestos for chlor-alkali as soon as the rule is published but will phase in prohibitions on chlor-alkali use over five or more years to provide what the agency called "a reasonable transition period." A ban on most other uses of asbestos will effect in two years. A ban on asbestos in oilfield brake blocks, aftermarket automotive brakes and linings and other gaskets will take effect in six months. The EPA rule allows asbestos-containing sheet gaskets to be used until 2037 at the U.S. Department of Energy's Savannah River Site in South Carolina to ensure that safe disposal of nuclear materials can continue on schedule. Separately, the EPA is also evaluating so-called legacy uses of asbestos in older buildings, including schools and industrial sites, to determine possible public health risks. A final risk evaluation is expected by the end of the year.

Medicine

5-Year Study Finds No Brain Abnormalities In 'Havana Syndrome' Patients (www.cbc.ca) 38

An anonymous reader quotes a report from CBC News: An array of advanced tests found no brain injuries or degeneration among U.S. diplomats and other government employees who suffer mysterious health problems once dubbed "Havana syndrome," researchers reported Monday. The National Institutes of Health's (NIH) nearly five-year study offers no explanation for symptoms including headaches, balance problems and difficulties with thinking and sleep that were first reported in Cuba in 2016 and later by hundreds of American personnel in multiple countries. But it did contradict some earlier findings that raised the spectre of brain injuries in people experiencing what the State Department now calls "anomalous health incidents."

"These individuals have real symptoms and are going through a very tough time," said Dr. Leighton Chan, NIH's chief of rehabilitation medicine, who helped lead the research. "They can be quite profound, disabling and difficult to treat." Yet sophisticated MRI scans detected no significant differences in brain volume, structure or white matter -- signs of injury or degeneration -- when Havana syndrome patients were compared to healthy government workers with similar jobs, including some in the same embassy. Nor were there significant differences in cognitive and other tests, according to findings published in the Journal of the American Medical Association.

AI

AI-Generated Science 32

Published scientific papers include language that appears to have been generated by AI-tools like ChatGPT, showing how pervasive the technology has become, and highlighting longstanding issues with some peer-reviewed journals. From a report: Searching for the phrase "As of my last knowledge update" on Google Scholar, a free search tool that indexes articles published in academic journals, returns 115 results. The phrase is often used by OpenAI's ChatGPT to indicate when the data the answer it is giving users is coming from, and the specific months and years found in these academic papers correspond to previous ChatGPT "knowledge updates."

"As of my last knowledge update in September 2021, there is no widely accepted scientific correlation between quantum entanglement and longitudinal scalar waves," reads a paper titled "Quantum Entanglement: Examining its Nature and Implications" published in the "Journal of Material Sciences & Manfacturing [sic] Research," a publication that claims it's peer-reviewed. Over the weekend, a tweet showing the same AI-generated phrase appearing in several scientific papers went viral.

Most of the scientific papers I looked at that included this phrase are small, not well known, and appear to be "paper mills," journals with low editorial standards that will publish almost anything quickly. One publication where I found the AI-generated phrase, the Open Access Research Journal of Engineering and Technology, advertises "low publication charges," an "e-certificate" of publication, and is currently advertising a call for papers, promising acceptance within 48 hours and publication within four days.
Space

What's Next for SpaceX's Starship? (thestreet.com) 104

The Street interviewed Chad Anderson, founder/managing partner of the "space economy" investment firm Space Capital, who calls SpaceX's progress "unprecedented," and believes their next launch could carry "operational" payloads like Starlink satellites. Anderson added that Starship reaching orbital velocity and reentering the atmosphere at those speeds (roughly 16,000 miles per hour) was "a really big deal," though it's specifically important for the reusability of the vehicle, which would further cheapen the cost of launch.

"The fact that they did all those things and they can now move into operations as an investor is hugely important and significant," Anderson said. "Having an operational Starship vehicle is really important because, at the moment, they just can't launch Starlink satellites fast enough. Starship is going to be able to launch 10 times more than Falcon 9 can, and that's really important...."

The ship is so big that, according to Anderson, Starship could conceivably serve as a space station, or a hotel, or a manufacturing facility. There is also the potential of Starship actually competing with commercial airlines, flying, for example, from New York to Shanghai in 45 minutes.

Clayton Swope, senior fellow at CSIS, also believes Starship could be used for "last-mile delivery... where you could move something in less than an hour, anywhere from a point on Earth to another point on Earth, and you're just kind of using space as that transit point."

There's also defense applications. Defense One notes the U.S. Defense Department uses SpaceX to launch most of its satellites. "With a payload capacity of 100 to 150 tons, Starship could carry a bunch of satellites simultaneously and increase the Space Force's launch rate as it builds out a network of hundreds of satellites in low-Earth orbit." Once Starship is operational, it will be able to put things into higher orbits, which is key for the Pentagon's push to operate in the cislunar environment, the area between the geosynchronous orbit and the moon. "The Chinese have already begun cislunar operations and have put vehicles on the far side of the moon, which is something the U.S. doesn't really have the ability to do right now," said Bryan Clark, a senior fellow at the Hudson Institute.

However, the advantage the U.S. will get with Starship "won't last forever," and it will take years to build satellites specifically designed to take advantage of the rocket's payload capacity, said Todd Harrison, a senior fellow at the American Enterprise Institute. "At this rate, they will have Starship operational this year. We need payloads to go on that, if we're actually going to take advantage of it during this window of opportunity when it's a capability only we have. If you want those payloads available next year, you needed to start building them five years ago," Harrison said.

Starship could be used to put very large objects into space, such as fuel barges or energy stations, at a reasonable cost. "You could use this to put up an orbital bus that you can then put on and remove payloads from, so you can have a satellite on orbit that's basically a large docking station," Clark said... "[I]t could be a way to do that kind of thing where you establish essentially an unmanned, little space station that can carry various payloads."

Transportation

Tiny Sea Creatures Could Help Unravel Flight MH370's Mysterious Disappearance. (wionews.com) 28

After the mysterious disappearance of Malaysia Airlines Flight MH370, barnacles offer "a potential breakthrough" in the search for its wreckage, reports WION: These barnacles were discovered clinging to the initial piece of debris conclusively linked to MH370 — a flaperon bearing the distinctive marking "657 BB," which washed ashore on Reunion Island, situated off the coast of Africa, a year following the event...

Scientists now posit that barnacles could provide invaluable insights into solving this mystery. These small creatures offer a unique biological record akin to the growth rings found in trees. Researchers speculate that by deciphering this information, it may be feasible to retrace the barnacles' trajectory along the flaperon, potentially leading investigators to the crash site.

This week the Independent also reported a new theory from a British pilot: Simon Hardy believes that the Malaysian Airlines flight plan and technical log reveal last-minute changes to the cargo including an additional 3,000kg of fuel and extra oxygen that indicate Captain Zaharie Ahmad Shah directed the plane "to oblivion... It's a strange coincidence that the last engineering task that was done before it headed off to oblivion was topping up crew oxygen which is only for the cockpit, not for the cabin crew...."

Hardy also said that the flaperon found on Reunion Island indicates there was an active pilot until the end of the flight: "If the flaps were down, there is a liquid fuel, then someone is moving a lever and it's someone who knows what they are doing. It all points to the same scenario."

In a kind of rebuttal, long-time Slashdot reader Maury Markowitz suggests there's more innocent explanations for the extra fuel and oxygen, arguing that Hardy's theory "sounds like yet more balonium from someone who likes being in the newspapers."

Thanks to Slashdot reader Press2ToContinue for sharing the news.
Math

Pi Calculated to 105 Trillion Digits. (Stored on 1 Petabyte of SSDs) (solidigm.com) 95

Pi was calculated to 100 trillion decimal places in 2022 by a Google team lead by cloud developer advocate Emma Haruka Iwao.

But 2024's "pi day" saw a new announcement... After successfully breaking the speed record for calculating pi to 100 trillion digits last year, the team at StorageReview has taken it up a notch, revealing all the numbers of Pi up to 105 trillion digits! Spoiler: the 105 trillionth digit of Pi is 6!

Owner and Editor-in-Chief Brian Beeler led the team that used 36 Solidigm SSDs (nearly a petabyte) for their unprecedented capacity and reliability required to store the calculated digits of Pi. Although there is no practical application for this many digits, the exercise underscores the astounding capabilities of modern hardware and an achievement in computational and storage technology...

For an undertaking of this size, which took 75 days, the role of storage cannot be understated. "For the Pi computation, we're entirely restricted by storage, says Beeler. "Faster CPUs will help accelerate the math, but the limiting factor to many new world records is the amount of local storage in the box. For this run, we're again leveraging Solidigm D5-P5316 30.72TB SSDs to help us get a little over 1P flash in the system.

"These SSDs are the only reason we could break through the prior records and hit 105 trillion Pi digits."

"Leveraging a combination of open-source and proprietary software, the team at StorageReview optimized the algorithmic process to fully exploit the hardware's capabilities, reducing computational time and enhancing efficiency," Beeler says in the announcement.

There's a video on YouTube where the team discusses their effort.

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