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54 articles from PhysOrg

'Universal law of touch' will enable new advances in virtual reality

Seismic waves, commonly associated with earthquakes, have been used by scientists to develop a universal scaling law for the sense of touch. A team, led by researchers at the University of Birmingham, used Rayleigh waves to create the first scaling law for touch sensitivity. The results are published in Science Advances.

A new look at sunspots

NASA's extensive fleet of spacecraft allows scientists to study the Sun extremely close-up—one of the agency's spacecraft is even on its way to fly through the Sun's outer atmosphere. But sometimes taking a step back can provide new insight.

Evidence of top quarks in collisions between heavy nuclei

The result of recent research by the CMS collaboration opens the path to study in a new and unique way an extreme state of matter that is thought to have existed shortly after the Big Bang. The collaboration has seen evidence of top quarks in collisions between heavy nuclei at the Large Hadron Collider (LHC).

Pollutants banned for over 30 years linger in UK rivers – our wildlife is the evidence

Banned and disused chemicals from our more industrial past continue to poison wildlife in rivers throughout the UK. But since these pollutants tend to exist in low concentrations in water and sediments, their modern influence is somewhat hidden. Animals accumulate chemicals over longer periods of time though, and in new research, we've discovered how these toxic relics are funneled through food...

Researchers study the invasive frog's role in Galapagos food web

"I have taken pains to verify this assertion, and have found it true that frogs, toads, and newts are absent from most oceanic islands"—thus states Charles Darwin in his well-known work "On the Origin of Species." For a long time, this observation by the famous naturalist also held true for the Galápagos Islands, which are inextricably linked to his name. "This only changed with the arrival of...

Climate change is threatening unique permafrost landforms

As the permafrost thaws, the topography of the Arctic will alter dramatically, according to an international study headed by Finnish geographers. The study, which covered the entire area of permafrost in the Arctic, found that many of the permafrost landforms now occurring in that region were in danger of disappearing some time this century, and the change has already begun.

Direct coupling of aryl halides and alkyllithium compounds by palladium catalysis

Palladium catalysts help synthesize key chemicals for many industries. However, direct reaction of two basic reagents, aryl halides and alkyllithium compounds, remains a challenge. Now, a team of scientists have found that a catalyst containing YPhos-type ligands can mediate this reaction even at room temperature. This discovery may contribute to the development of more sustainable processes in...

Research has helped underpin the formation of a nature reserve in Vietnam

Research by the University of Leeds and Utrecht University has helped secure the highest government protection for internationally-important Vietnamese forests. Over the past five years, conservation organization Viet Nature, and its partners World Land Trust, IUCN National Committee of the Netherlands (IUCN NL), Birdlife International and researchers from the University of Leeds and Utrecht...

Turning a hot spot into a cold spot: Fano-shaped local-field responses probed by a quantum dot

Optical nanoantennas can convert propagating light to local fields. The local-field responses can be engineered to exhibit nontrivial features in spatial, spectral and temporal domains. Local-field interferences play a key role in the engineering of local-field responses. By controlling local-field interferences, researchers have demonstrated local-field responses with various spatial...

Graphene microbubbles make perfect lenses

Tiny bubbles can solve large problems. Microbubbles—around 1-50 micrometers in diameter—have widespread applications. They're used for drug delivery, membrane cleaning, biofilm control, and water treatment. They've been applied as actuators in lab-on-a-chip devices for microfluidic mixing, ink-jet printing, and logic circuitry, and in photonics lithography and optical resonators. And they've...