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כתבות אחרונות מאתר 'Phys'
Phys

Ribosome-based gene circuit lets cells read six signals and trigger responses‎

The molecular machinery that normally builds proteins inside cells has now taken on a new role as a "switch." A research team at POSTECH (Pohang University of Science and Technology) has developed a new 'RNA-based smart gene circuit' platform that can simultaneously read multiple signals inside a cell, make its own decisions and autonomously generate programmed responses. This represents a step beyond simple genetic manipulation toward an era in which cells themselves function as "living computers."

22:11
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Phys

The gap between forecasts and reality can change public emotions during disasters‎

What happens when weather forecasts do not match reality? How does the public emotionally respond when a disaster unfolds differently from what they expected? A research team led by Professor Jonghun Kam and Kiru Kim from the Department of Environmental Engineering at POSTECH investigated how forecast error types influenced public emotion during the landfall of Typhoon Khanun. Using artificial intelligence (AI) and natural language processing (NLP), the researchers found that different types of forecast error (e.g., overestimation and underestimation) triggered distinct emotional responses among the public. The study has been published in GeoHealth.

22:11
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Phys

Managing water with local wisdom and science‎

Across a narrow watershed in Asakura, a rural city in Fukuoka Prefecture, centuries-old stone channels still guide water through fields and into the river below. Today, those same systems are the focus of researchers at Kyushu University's Watershed Systems Engineering Laboratory. One of their projects aims to restore abandoned rice fields to functioning wetlands and forest habitats.

21:12
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Phys

Heavy traffic can turn flower-rich verges into bumblebee traps, study finds‎

Flower-rich road verges may attract hungry bumblebees, but at the same time, they can be dangerous for the buzzing insects—if traffic is too heavy. The new research from Lund University in Sweden examined the role roadsides play for bumblebees. The results show that road verges can be a dangerous environment for insects searching for food. The team used specially trained dogs that had learned to sniff out bumblebee nests to assist them. The survey covered 60 road verges in southern Sweden and compared the number of dead and living bumblebees along roads with varying traffic intensities.

21:12
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Phys

A robot that reads bacteria by touch, without staining or chemical labels‎

Fast identification of bacteria is important in health care, food safety, environmental monitoring and infection control. One of the most common first steps is gram classification, which separates bacteria into gram-positive and gram-negative groups. This information can help guide early treatment decisions and safety responses. However, conventional Gram staining requires several chemical steps, trained personnel and manual interpretation.

20:06
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Phys

World's largest whale graveyard discovered by Chinese sub‎

The world's largest whale graveyard has been discovered at the bottom of the Indian Ocean by Chinese scientists, who found that the vast expanse of both new and ancient carcasses supports huge communities of deep-sea life.

20:06
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Phys

Tiny worms reveal backup circuits that keep survival reflexes from failing‎

A research team led by Professor Chaogu Zheng from the School of Biological Sciences at the University of Hong Kong (HKU), in collaboration with scientists from Princeton University and Columbia University, has discovered how sensory-motor circuits—nerve circuits that turn sensory signals into reflex actions—remain reliable even when some genes or neural connections are disrupted.

19:01
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Phys

Could permanent magnets protect astronauts from solar storms?‎

Shielding astronauts from the deadly radiation they face is a central challenge for any designer of a deep-space crewed mission. Even relatively low levels of exposure over long periods can lead to everything from central nervous system damage to cancer. But current solutions, such as passive water shells or active superconducting magnets, have their own limitations. To get around those, a new paper, available in preprint on arXiv by Valerio Parisi and a team of researchers from Italy and Germany, looks at the feasibility of using a permanent magnet (and its associated permanent magnetic field) to potentially block some of that radiation without the costs of competing technologies.

18:42
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Phys

X-ray tracking reveals uneven expansion in young supernova remnant G292.0+1.8‎

By analyzing data from NASA's Chandra X-ray Observatory, Dutch astronomers have investigated a young, oxygen-rich supernova remnant known as G292.0+1.8. Results of the new study, published June 29 on the arXiv preprint server, yield important insights into the expansion of this remnant.

18:06
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Phys

'Their story is our story': Pigeons and humans, 3,500 years together‎

They have been our meat and our messengers, a source of fertilizer and a religious symbol: while pigeons are now mostly reviled as dirty city pests, they long played an important role in human society.

17:33
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