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כתבות אחרונות מאתר 'Phys'
Phys

Study reveals pupils most at risk of school suspension and what may help them‎

School suspensions are associated with a complex combination of socioeconomic disadvantage, special educational needs, peer relationships and students' experiences of school, according to new research from The University of Manchester.

04:24
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Phys

Deadly floods of 2021—Researchers identify gaps in hazard mapping‎

The catastrophic flooding in July 2021 claimed the lives of more than 200 people in Germany and Belgium. The high death toll makes it clear that hazard mapping and risk communication must be improved urgently. Researchers at the University of Potsdam, the Helmholtz Centre for Geosciences, the University of Louvain and Johns Hopkins University analyzed the locations and specific circumstances of 224 deaths. Their findings show that many occurred outside the officially mapped flood hazard zones and that older people were particularly affected. The work is published in the journal Earth's Future.

02:55
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Phys

Researchers tune into Arctic under-ice sounds and test through-ice communication‎

Beneath the Arctic Ocean is an orchestra featuring natural and human composers, from cracking sea ice and whistling beluga whales to humming shipping-vessel engines. Researchers from MIT Lincoln Laboratory heard some of this cacophony when analyzing data from commercial off-the-shelf sensors that they integrated and deployed in 2024 during the U.S. Navy's Operation Ice Camp (OIC). This past March, during OIC 2026, the researchers returned to the Arctic with a higher-fidelity version of one of the sensors, a geophone that detects vibrations in the sea ice.

01:28
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Phys

A new type of LED light could bring significant efficiency gains‎

Researchers at Lund University have developed a new type of light-emitting diode based on thin, branched nanowires that could offer significantly higher efficiency and lower production costs than current technology. By controlling where in the structure the light is generated, the researchers have reduced the losses that would otherwise limit the amount of light that can be used. Their study is published in the journal Nano Research.

01:13
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Phys

In ant nervous systems, gene expression may drive rescue behavior‎

Why do some ants help nestmates in distress while others don't? A research team from Johannes Gutenberg University Mainz (JGU) and Tel Aviv University addressed this question in a new study. The researchers examined worker ants of the species Cataglyphis niger, some of which had shown rescue behavior while others had not. The results, recently published in the Journal of Experimental Biology, suggest that the key difference lies not in body size, morphology or the animals' energy reserves, but in gene activity in the nervous system.

00:47
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Phys

Magic-angle graphene provides evidence for unconventional superconductivity‎

Researchers have completely suppressed superconductivity in magic-angle graphene by screening interactions between electrons, helping resolve a long-running debate about the origin of the phenomenon.

00:26
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Phys

New AI tool maps the hidden universe of small molecules‎

The human body and its gut microbiome produce thousands of small molecules that shape how the body functions—influencing immunity, metabolism and more. Identifying what those molecules actually are has been one of the biomedical sciences' most persistent bottlenecks. More than 80% of compounds detected in a typical biological sample cannot be matched to any known structure using current methods.

00:01
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Phys

Shoreline scavenger shows biological effects after eating plastic foam‎

In a paper published in the journal Marine Pollution Bulletin, researchers at Kyushu University report on what happens when wharf roaches, a common shoreline scavenger, eat expanded polystyrene (EPS). Roaches that fed on EPS showed no significant reduction in lifespan, but their guts displayed altered expression of genes involved in chemical defense, DNA repair and digestion. Analysis of the wharf roach gut microbiome showed little change, but several rare microbes were found only in the EPS-fed specimens.

23:55
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Phys

Do games make children more attentive or more distractible?‎

A study of preschool children found that brief digital or traditional gameplay improved performance on tasks requiring quick responses but reduced performance on tasks demanding greater concentration and self-control.

23:42
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Phys

Periodical cicadas may be doomed to extinction‎

Every 13 or 17 years, swarms of cicadas emerge from the ground, their black bodies, orange-tinged wings and ruby-red eyes enveloping trees and forests. It is a biological marvel unique in the insect world, and when it happens, it is impossible not to notice.

23:42
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