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כתבות אחרונות מאתר 'Phys'
Phys

Liquid gallium experiment confirms key flow regime inside rapidly rotating stars and planets‎

Since we cannot look into the interiors of stars and planets, we rely on lab experiments to replicate the physical processes that occur there. Led by the University of California, Los Angeles (UCLA), an international research team has produced the first experimental verification of a theoretically predicted flow state deemed characteristic of the interiors of rapidly rotating celestial bodies. The Helmholtz-Zentrum Dresden-Rossendorf (HZDR) also participated in the study, which has been published in Physical Review Letters. The results provide a robust experimental basis for testing theoretical models of the processes that occur inside these celestial bodies.

21:44
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Phys

Genetic traces reveal river residents: 1,072 species in a bucket of water‎

Can DNA traces in just two liters (0.5 gallons) of water reveal how a river's biodiversity changes over the course of a year? A study by the University of Duisburg-Essen using the River Lippe as an example shows how biodiversity in freshwater ecosystems can be monitored comprehensively, efficiently and at comparatively low cost. The results have now been published in the journal Ecological Indicators.

21:44
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Phys

Better timetables could greatly shorten train travel times‎

Anyone traveling by train across Europe spends a surprisingly large portion of the trip not on a moving train. Today, about 25% of travel time is spent on transfers and layovers at train stations because of poorly coordinated timetables.

21:25
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Phys

Observing the vibrations of neighboring atoms with an atomic-scale double slit‎

Efficiently controlling heat generation has become a major challenge as the semiconductors used in smartphones, computers and similar devices have become higher-performing and more miniaturized. The way heat is transmitted is determined by the vibration of the atoms that constitute a material, but it is not easy to directly examine, at the atomic scale, how neighboring atoms vibrate in coordination with one another.

21:25
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Phys

When fruits and veggies are scarce, monkeys hunt for meat‎

Capuchin monkeys hunt prey when fruits and vegetables become scarce, potentially mirroring the habits of human ancestors, according to a study published in PLOS One by Susana Carvalho (Gorongosa National Park, Mozambique), Noemi Spagnoletti (Sapienza University of Rome, Italy) and colleagues.

21:01
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Phys

Many workplaces resist plant-based lunches despite substantial climate benefits‎

Are organizations ready for plant-based food at work? A new study from the University of Copenhagen explores this question and shows that only a small proportion of workplaces in Denmark are ready for this change—despite its potential to reduce the climate footprint of workplace lunches. In general, introducing plant-based food is likely to stir strong emotions.

21:01
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Phys

Tiny atomic changes could lead to smarter wireless technology‎

Researchers at Queen Mary University of London have shown that making extremely small changes to the structure of a material can dramatically improve its ability to respond to electrical signals. Published recently in Science Advances, the breakthrough could help create a new generation of wireless devices that can change frequency on demand, making communication systems more flexible and energy efficient.

21:01
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Phys

Narwhals help researchers uncover unique data from the deepest East Greenland fjords‎

They live in some of the most inaccessible waters on Earth, where ocean temperatures hover around freezing. Because they move through areas that humans rarely reach, they have been able to help researchers with a special task.

21:01
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Phys

Climate change exposes up to 560 million children globally to at least one additional month of dangerous heat per year‎

New research by Vrije Universiteit Brussel (VUB) shows that globally, up to 560 million children ages 0–9 (43% of all children in this age group) experience at least one additional month (30 or more days) of heat stress per year because of human-induced climate change. This exposure outpaces that of any other age group and is nearly triple the 190 million people (30%) ages 60–69 experiencing this additional health threat. Children are therefore already facing disproportionately high levels of dangerous humid heat caused by human-induced climate change, with exposure expected to grow under further warming.

21:01
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Phys

Chagas parasite's survival trick offers antimalarial-style target‎

Researchers at the University of Cincinnati have identified a potential new target to prevent the spread of Chagas disease. The parasitic infection is transmitted through the bite of the kissing bug in Central and South America and, more recently, in the United States.

20:41
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