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כתבות אחרונות מאתר 'Phys'
Phys

On the ground or in the atmosphere? Swarm satellites help characterize and pinpoint destructive events‎

When solar storms strike Earth, they can disrupt power grids, rail systems, satellites, and even marine life. These effects arise because solar wind and geomagnetic activity disturb the magnetosphere–ionosphere system, generating electric and magnetic field variations that can resemble fainter signals from natural hazards. This risk is not theoretical.

09:09
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Phys

Space junk falls to Earth faster when sunspots peak, reshaping satellite collision forecasts‎

Solar emissions exert 'drag' on space junk orbiting Earth. From historical measurements across a period of 36 years, researchers have now shown that space junk begins to fall down much faster once the sun's activity across the solar cycle reaches approximately 67% of its peak. This result, which is expected to hold for station-keeping satellites too, is important for better planning of space missions that avoid collisions.

08:15
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Phys

Reducing social inequality: Why the scope of measures is crucial‎

In modern social research, sociological questions are increasingly being answered with the help of experiments; for example, whether employers discriminate in personnel selection, whether immigrants are treated less well in social situations, or whether counseling programs help to overcome educational inequalities.

03:49
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Phys

New algorithm spreads volunteers more fairly across nonprofits, with 8% broader reach‎

To ensure more food reaches communities in need, a team of researchers collaborated with VolunteerMatch and Feeding America to enhance their algorithms, making volunteer distribution more efficient and equitable.

03:28
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Phys

Safeguarding children in childcare: Teacher confidence key to addressing trauma‎

To better understand how young children experiencing trauma are supported in early learning settings, Adelaide University researchers examined the role of teacher self-efficacy—the confidence teachers have in their knowledge and abilities—in creating safe, responsive learning environments.

03:02
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Phys

Male coyote swam 2 miles to Alcatraz Island, twice as far as biologists had expected‎

A lone coyote stunned biologists and others when it paddled its way to remote Alcatraz Island earlier this year, a former federal prison in the San Francisco Bay surrounded by swift, choppy waters notorious for thwarting prisoners' escapes.

02:43
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Phys

CPR simulator for space use tracks the differences of blood flow in reduced gravity‎

The new focus on manned missions to the moon and Mars presents countless pressing challenges, including keeping humans alive in hostile environments. What happens when an astronaut or space tourist has a cardiac emergency millions of miles from the nearest hospital?

02:43
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Phys

Polymer 'bristles' could help repel proteins—and germs—from surfaces in medical settings‎

A non-toxic coating developed by researchers at University of Toronto Engineering prevents proteins from sticking to surfaces—potentially offering a new tool in the fight against hospital-acquired infections.

02:32
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Phys

Colonialism and the role of science in the history of Lake Malawi's fisheries‎

Many scholars have studied the effects of colonial management on terrestrial resources, but what about the effect of colonialism on bodies of water? A new article in Isis: A Journal of the History of Science Society examines the ways in which fisheries science and colonial development converged for the purpose of exploiting marine resources in British-controlled Nyasaland (now Malawi).

02:22
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Phys

Carnivorous plants and wasps blur the line between friend and food‎

Acid-filled pitchers complete with fangs. Labyrinthine chambers decorated with bristles. Leaves that snap shut in less than a second. Employing strategies like these, carnivorous plants have a reputation as fearsome predators, but a new study published in the journal Ecology suggests they may do more to help their insect neighbors than previously thought.

02:22
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