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כתבות אחרונות מאתר 'Phys'
Phys

Porpoise entanglement recorded in real time, revealing calls and escape attempts‎

Researchers at the University of St Andrews have gained unprecedented insight into marine mammal behavior when they become tangled in fishing nets. In a paper published Aug. 26 in Royal Society Open Science, researchers from the Sea Mammal Research Unit and Scottish Oceans Institute at St Andrews discovered that their passive acoustic monitoring (PAM) systems, deployed on a gill net, had unintentionally recorded a bycatch event. This is thought to be the first time this kind of recording has taken place in such detail.

02:11
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Phys

Could we protect all western US communities from wildfires and facilitate restoring fire to wildlands within a decade?‎

In a new study in Environmental Research: Ecology, I analyzed how fires were able to burn into communities and how fire-resistant land uses could be combined with fuel treatments to reduce fires burning into communities. If government support could be quickly redirected to community protection, communities could have time to fix much of this problem in roughly a decade.

02:04
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Phys

Although research on animal production and climate is growing, implementation in the field remains challenging‎

Climate change is reshaping global livestock production systems and leading to increased research on the topic. However, science still faces the challenge of translating advances in knowledge into practical solutions for the field and public policy. This is one of the main conclusions of a study published in the journal Tropical Animal Health and Production by researchers from the Luiz de Queiroz College of Agriculture at the University of São Paulo (ESALQ-USP) in Brazil.

01:44
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Phys

Adaptation and a 'Noah's Ark for trees' offer hope for endangered black ash‎

With the invasive emerald ash borer beetle decimating black ash across North America, according to the U.S. Forest Service, a team led by researchers at Penn State conducted an expansive study of genetic diversity in black ash seeds collected across the tree's geographic range and stored in seed banks. The research was done with an eye toward someday reintroducing the ecologically and culturally important tree to U.S. and Canadian forests. As part of the research, the team established three large common gardens—experimental plantings—of black ash that someday may play a role in producing seeds needed to bring the species back.

01:44
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Phys

Workplace social media reduces staff turnover, study finds‎

Social media used inside organizations may help engage employees and increase staff retention, according to a paper in the International Journal of Applied Systemic Studies that examined this phenomenon in China. Employee engagement refers to a worker's emotional and motivational connection with their organization, the team explains, while retention is the organization's ability to keep employees and reduce staff turnover rates.

01:24
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Phys

Hydroclimate whiplash damages California's tallest redwoods after years of drought‎

Tall trees are generally associated with high-biomass forests. This is particularly true for forests dominated by Sequoia sempervirens (hereafter redwood), the world's tallest tree species. Extreme decay resistance, the ability to survive high-severity fires, shade tolerance and prolific trunk reiteration (resprouting) make the species unique, allowing tall redwood forests to accumulate more biomass and store more aboveground carbon than any other vegetation type.

01:24
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Phys

3D atomic imaging reveals a new pathway to crystal formation‎

The most common scientific approach for thinking about how condensation, freezing and other phase transitions begin is based in classical nucleation theory, which was developed about a century ago. Thousands of experiments have supported a key equation describing how initial ordered seeds, called nuclei, form within disordered matter.

01:04
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Phys

Closing the gap between wildfire modeling and real-world response‎

Canada's 2023 wildfire season burned more than 18.5 million hectares (45.7 million acres), an area larger than Greece. As fires like these grow more frequent and unpredictable, a team of UBC Okanagan researchers has taken stock of two decades of work applying operations research to the problem and found a field that has matured quickly but still struggles to get its best ideas out of journals and into the field.

01:04
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Phys

JWST reveals a race against time for forming planets‎

Planets form from disks of gas and dust around young stars, but the gas needed for growth does not last forever. New observations from NASA's James Webb Space Telescope (JWST) now offer a new view of how this gas escapes and how the process changes as young planetary systems develop.

00:53
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Phys

Habitat changes found to be no deterrent for some Fijian native bees‎

While extreme weather and habitat changes can spell doom for many native animals, including insects, a different picture has emerged from a new study led by Flinders University. Long-running investigations into Fiji's native bee populations indicate several species of lowland sweat bees (genus Lasioglossum) have evolved and used their individual traits to resist human-driven environmental changes, allowing them to survive and thrive.

00:44
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