Physics

Speed-dependent attraction governs what goes on at the heart of midge swarms

Ever wondered what makes the collective behaviour in insect swarms possible? Andy Reynolds from Rothamsted Research, UK, and colleagues at Stanford University, California, USA, modelled the effect of the attraction force, which resembles Newton's gravity force, acting towards the centre of a midge swarm to give cohesion to their group movement. In a recent study published in EPJ E, their model reveals that the gravity-like attraction towards the heart of the swarm increases with an individual's flight speed.

New method can model chemistry in extreme magnetic fields of white dwarfs

Approximately 10-20 percent of white dwarfs exhibit strong magnetic fields, which can reach up to 100,000 tesla. However, on Earth, the strongest magnetic fields that can be generated using nondestructive magnets are about 100 tesla. Therefore, studying the chemistry in such extreme conditions is only possible using theory and until now has not provided much insight to the spectra accompanying white dwarfs.

New method can model chemistry in extreme magnetic fields of white dwarfs

Most stars become white dwarfs when they reach the end of their stellar life cycle. Astrophysicists determine what elements are present in these collapsed stars by comparing spectra observed from space against either experimentally re-created spectra measured in laboratories on Earth or theoretical spectra generated using computer models based on quantum-chemical principles. Over time, they have found that white dwarfs not only contain elements like hydrogen and helium, but also oxygen, silicon, phosphorous, carbon and carbon-containing compounds.

NASA Space Station Cargo Launches aboard Orbital ATK Resupply Mission

The International Space Station will be capable of dozens of new scientific investigations from NASA and around the world when Orbital ATK's Cygnus spacecraft delivers more than 7,600 pounds of cargo Saturday, April 22.

The perfect pattern to trap light

Superimposing two lattices of similar periods creates structures that researchers can design to control and localize light.

Novel semiconductor nanofiber with superb charge conductivity developed

A novel technology that embeds highly conductive nanostructure into semi-conductor nanofiber has now been developed by researchers. The novel composite so produced has superb charge conductivity, and can therefore be widely applied, especially in environmental arena.

'Gamers' method creates unique 4-D molecular spectral maps

Researchers have created a new method to extract the static and dynamic structure of complex chemical systems. In this context, 'structure' doesn't just mean the 3-D arrangement of atoms that make up a molecule, but rather time-dependent quantum-mechanical degrees of freedom that dictate the optical, chemical and physical properties of the system.

Researchers capture excess photon energy to produce solar fuels

Scientists have developed a proof-of-principle photoelectrochemical cell capable of capturing excess photon energy normally lost to generating heat.

'Gamers' method creates unique 4-D molecular spectral maps

Researchers at Northwestern University have created a new method to extract the static and dynamic structure of complex chemical systems. In this context, "structure" doesn't just mean the 3-D arrangement of atoms that make up a molecule, but rather time-dependent quantum-mechanical degrees of freedom that dictate the optical, chemical and physical properties of the system.

LHCb finds new hints of possible deviations from the Standard Model

The LHCb experiment finds intriguing anomalies in the way some particles decay. If confirmed, these would be a sign of new physics phenomena not predicted by the Standard Model of particle physics. The observed signal is still of limited statistical significance, but strengthens similar indications from earlier studies. Forthcoming data and follow-up analyses will establish whether these hints are indeed cracks in the Standard Model or a statistical fluctuation.

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