Feed aggregator

A clinical trial found that seniors at high stroke risk who wore an Apple Watch were four times more likely to have hidden heart rhythm disorders detected than those receiving standard care. The researchers noted that over half the time, these smartwatch wearers with heart rhythm problems hadn't shown any symptoms prior to diagnosis. From U.S. News & World Report: Later editions of Apple Watches are equipped with two functions that can help monitor heart health -- photoplethysmography (PPG), which tracks heart rate, and a single-lead electrocardiogram (ECG) that monitors heart rhythm. "Using smartwatches with PPG and ECG functions aids doctors in diagnosing individuals unaware of their arrhythmia, thereby expediting the diagnostic process," said senior researcher Dr. Michiel Winter, a cardiologist at Amsterdam University Medical Center in The Netherlands. "Our findings suggest a potential reduction in the risk of stroke, benefiting both patients and the health care system by reducing costs," Winter said in a news release. [...] Smartwatches are much easier than other wearable devices for detecting irregular heart rhythms [...]. These other means require people to wear sticky leads, carry around bulky monitors or even receive short-term implants. Lead researcher Nicole van Steijn, a doctoral candidate at Amsterdam UMC, noted that wearables that track both the pulse and electrical activity have been around for a while. "However, how well this technology works for the screening of patients at elevated risk for atrial fibrillation had not yet been investigated in a real-world setting,"she said in a news release. The findings have been published in the Journal of the American College of Cardiology.

Read more of this story at Slashdot.

Study Shows How Earthquake Monitors Can Track Space Junk Through Sonic Booms

Slashdot.org - Sat, 01/24/2026 - 02:00

A new study shows that earthquake monitoring networks can track falling space debris by detecting the sonic booms produced during atmospheric reentry, sometimes more accurately than radar. The Associated Press reports: Scientists reported Thursday that seismic readings from sonic booms that were generated when a discarded module from a Chinese crew capsule reentered over Southern California in 2024 allowed them to place the object's path nearly 20 miles (30 kilometers) farther south than radar had predicted from orbit. Using this method to track uncontrolled objects plummeting at supersonic speeds, they said, could help recovery teams reach any surviving pieces more quickly -- crucial if the debris is dangerous. "The problem at the moment is we can track stuff very well in space," said Johns Hopkins University's Benjamin Fernando, the lead researcher. "But once it gets to the point that it's actually breaking up in the atmosphere, it becomes very difficult to track." His team's findings, published in the journal Science, focus on just one debris event. But the researchers already have used publicly available data from seismic networks to track a few dozen other reentries, including debris from three failed SpaceX Starship test flights in Texas. [...] Fernando is looking to eventually publish a catalog of seismically tracked, entering space objects, while improving future calculations by factoring in the wind's effect on falling debris. In a companion article in Science, Los Alamos National Laboratory's Chris Carr, who was not involved in the study, said further research is needed to reduce the time between an object's final plunge and the determination of its course. For now, Carr said this new method "unlocks the rapid identification of debris fall-out zones, which is key information as Earth's orbit is anticipated to become increasingly crowded with satellites, leading to a greater influx of space debris."

Read more of this story at Slashdot.

New Filtration Technology Could Be Gamechanger In Removal of PFAS 'Forever Chemicals'

Slashdot.org - Fri, 01/23/2026 - 22:30

Bruce66423 shares a report from the Guardian: New filtration technology developed by Rice University may absorb some Pfas "forever chemicals" at 100 times the rate than previously possible, which could dramatically improve pollution control and speed remediations. Researchers also say they have also found a way to destroy Pfas, though both technologies face a steep challenge in being deployed on an industrial scale. A new peer-reviewed paper details a layered double hydroxide (LDH) material made from copper and aluminum that absorbs long-chain Pfas up to 100 times faster than commonly used filtration systems. [...] [Michael Wong, director of Rice's Water Institute, a Pfas research center] said Rice's non-thermal process works by soaking up and concentrating Pfas at high levels, which makes it possible to destroy them without high temperatures. The LDH material Rice developed is a variation of similar materials previously used, but researchers replaced some aluminum atoms with copper atoms. The LDH material is positively charged and the long-chain Pfas are negatively charged, which causes the material to attract and absorb the chemicals, Wong said. [...] Pfas are virtually indestructible because their carbon atoms are bonded with fluoride, but Rice found that the bonds could be broken if the chemicals in the material were heated to 400-500C -- a relatively low temperature. The fluoride gets trapped in the LDH material and is bonded to calcium. The leftover calcium-fluoride material is safe and can be disposed of in a landfill, Wong said. The process works with some long-chain Pfas that are among the most common water pollutants, and it also absorbed some smaller Pfas that are commonplace. Wong said he is confident the material can be used to absorb a broad array of Pfas, especially if they are negatively charged. Most new Pfas elimination systems fail to work at an industrial scale. Wong said the new material has an advantage because its absorption rate is so strong, it can be used repeatedly and it is in a "drop in material," meaning it can be used with existing filtration infrastructure. That eliminates one of the major cost barriers.

Read more of this story at Slashdot.