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Current Electromagnetic Waves News and Events, Electromagnetic Waves News Articles.
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Scientists observe a new quantum particle with properties of ball lightning
Scientists at Amherst College and Aalto University have created, for the first time a three-dimensional skyrmion in a quantum gas. The skyrmion was predicted theoretically over 40 years ago, but only now has it been observed experimentally. (2018-03-02)

A spinning top of light
Short, rotating pulses of light reveal a great deal about the inner structure of materials. An international team of physicists led by Prof. Misha Ivanov of the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI) has now developed a new method for precisely characterising such extremely short light pulses. The research results have been published in (2018-03-01)

Practical spin wave transistor one step closer
University of Groningen physicists have managed to alter the flow of spin waves through a magnet, using only an electrical current. This is a huge step towards the spin transistor that is needed to construct spintronic devices. These promise to be much more energy efficient than conventional electronics. The results were published on March 2 in Physical Review Letters. (2018-03-01)

Storm waves can move boulders we thought only tsunamis had the power to shift
In a new paper in Earth Science Reviews, researchers from Williams College in the US show that four years ago, storms moved huge boulders along the west coast of Ireland. The same storms shifted smaller ones as high as 26 meters above high water and 222 meters inland. Many of the boulders moved were heavier than 100 tons, and the largest moved was 620 tons -- the equivalent of six blue whales or four single-storey houses. (2018-02-28)

Astronomers detect earliest evidence yet of hydrogen in the universe
MIT and ASU astronomers have detected the earliest signs of hydrogen in the universe, suggesting first stars appeared around 180 million years after the Big Bang. (2018-02-28)

Astronomers detect ancient signal from first stars in universe.
For the first time, astronomers have detected a signal from stars emerging in the early universe. Using a radio antenna not much larger than a refrigerator, the researchers discovered that ancient suns were active within 180 million years of the Big Bang. (2018-02-28)

Synchronised waves control embryonic patterning
During an embryo's journey from a single cell to a complex organism, countless patterning processes make sure that the right cells develop in exactly the right location and at the right time. Cells activate specific genes in a rhythmic manner during this early development, resulting in waves of activation sweeping through the embryo. EMBL scientists now show that the rhythm between two specific sets of waves -- Wnt and Notch -- enables the formation of new segments. (2018-02-22)

Quantum recurrence: Everything goes back to the way it was
When a complex system is left alone, it will return to its initial state with almost perfect precision. Gas particles in a container, for example, will return almost exactly to their starting positions after some time. For decades, scientists have investigated how this 'Poincaré Recurrence Theorem' can be applied to the world of quantum physics. Now, researchers at TU Wien (Vienna) have successfully demonstrated a kind of 'Poincaré recurrence' in a multi-particle quantum system. (2018-02-22)

Basque researchers turn light upside down
Researchers from CIC nanoGUNE (San Sebastian, Spain), in collaboration with the Donostia International Physics Center (DIPC, San Sebastian, Spain) and Kansas State University (USA), report in Science the development of a so called 'hyperbolic metasurface' on which light propagates with completely reshaped wafefronts. This scientific achievement towards a more precise control and monitoring of light is highly interesting for the long run technological challenge of miniaturizing optical devices for sensing and signal processing. (2018-02-22)

Microanalysis of biological samples for early disease detection
Osaka University researchers developed a microanalysis device that uses terahertz waves, showing high sensitivity for detecting ultra-trace amounts of analyte. The single microchannel system with a few arrays of split ring resonators showed femtomole sensitivity for minerals in picoliter volumes of water. They extrapolated this success to potential detection in clinical and research applications. Fast, non-invasive screening for early detection of cancers and diabetes, and facile identification of the influenza virus, are especially compelling prospects. (2018-02-20)

Pulsating Aurora mysteries uncovered with help from NASA's THEMIS mission
The precise mechanism driving pulsating auroras, long unknown, has now been identified with help from NASA's THEMIS mission. (2018-02-20)

Distant tropical storms have ripple effects on weather close to home
In a new paper in npj Climate and Atmospheric Science, Colorado State University researchers describe a breakthrough in making accurate predictions of weather weeks ahead. They've created an empirical model fed by careful analysis of 37 years of historical weather data. Their model centers on the relationship between two well-known global weather patterns: the Madden-Julian Oscillation and the quasi-biennial oscillation. (2018-02-20)

Autonomous vehicles improve traffic flow
Improvements in traffic flow and fuel consumption are boosted when even a few autonomous vehicles are immersed in bulk traffic, according to research by Rutgers University-Camden mathematics scholar Benedetto Piccoli. (2018-02-19)

Chemical waves guide scientists to catalysts of the future
Waves are known in many very different forms; as water waves, light waves or sound waves. But studying polycrystalline catalysts, scientists have now found something quite different -- chemical waves. A chemical reaction takes place on the surface of a crystal, which returns periodically to its original state. Fascinating spiral structures form, the movement of which allows to collect information about the characteristics of the individual grains of crystal. (2018-02-19)

Dance of auroras
The shower of electrons bouncing across Earth's magnetosphere -- commonly known as the Northern Lights -- has been directly observed for the first time by an international team of scientists. While the cause of these colorful auroras has long been hypothesized, researchers had never directly observed the underlying mechanism until now. (2018-02-14)

Supermassive black hole model predicts characteristic light signals at cusp of collision
A new simulation of supermassive black holes--the behemoths at the centers of galaxies--uses a realistic scenario to predict the light signals emitted in the surrounding gas before the masses collide, said Rochester Institute of Technology researchers. (2018-02-14)

By 2100, arid cities will suffer from more severe heat waves than temperate cities
By 2100, arid cities like Phoenix will become hotbeds for heatwaves compared to their rural surroundings, while cities on the eastern seaboard will be less severely affected by heatwaves compared to theirs. The findings highlight the importance of heat-mitigation strategies and infrastructures such as green roofs. (2018-02-13)

Giant lava dome confirmed in Japan's Kikai Caldera
Researchers have confirmed that a giant lava dome was created in the Kikai Caldera, south of Japan's main islands after the caldera-forming supereruption 7,300 years ago. The dome is in the world's largest class of post-caldera volcano, with a volume of over 32 cubic kilometers. It is possible that currently a giant magma buildup may exist under the Kikai Caldera. (2018-02-09)

Fruit bat's echolocation may work like sophisticated surveillance sonar
High-speed recordings of Egyptian fruit bats in flight show that instead of using a primitive form of echolocation, these animals actually use a technique recently developed by humans for surveillance and navigation. (2018-02-07)

Advances open new frequency range for wireless communications
The 'internet of things,' which make everything from your toaster to your front door accessible online, has driven an explosion in data traffic and taken up huge amounts of bandwidth. However, a new range of frequencies in the terahertz region of the spectrum may soon be available for use. A paper in this week's APL Photonics demonstrates the feasibility of using THz carrier waves for data transmission in diverse situations and environments. (2018-02-06)

The future of wireless communications is terahertz
Electrical and optical engineers in Australia have designed a novel platform that could tailor telecommunication and optical transmissions. They experimentally demonstrated their system using a new transmission wavelength with a higher bandwidth capacity than those currently used in wireless communication. Reported this week in APL Photonics, these experiments open up new horizons in communication and photonics technology. (2018-02-06)

Researchers take terahertz data links around the bend
A new study shows terahertz data links are possible even without direct line-of-sight between transmitter and receiver, a promising finding for future ultra-high-capacity terahertz data networks. (2018-02-06)

Round-the-clock power from smart bowties
Innovative diode design uses ultrafast quantum tunneling to harvest infrared energy from the environment. (2018-02-05)

Model predicts scenarios for power generation using nuclear fusion
Study by Brazilian researcher helps scientists understand and control physical processes that are essential to the success of ITER, a fusion reactor designed to reproduce on a small scale the process that generates energy in the Sun. A future fusion reactor would feature advantages when compared to nuclear fission technology: in addition to the absence of radioactive waste, its system works by a self-control physical process that prevents overheating problems. (2018-01-29)

Interstellar fullerenes may help find solutions for earthly matters
The nearest interstellar clouds with confirmed fullerene presence are about 1,000 light years away from Earth. Electromagnetic spectra of 19 distant stars were provided by the VLT telescope in Chile, one of the largest in the world. The authors found fullerenes which left traces - absorption lines in certain frequencies. (2018-01-29)

Research boosts efficiency and stability of optical rectennas
The research team that announced the first optical rectenna in 2015 is now reporting a two-fold efficiency improvement in the devices -- and a switch to air-stable diode materials. The improvements could allow the rectennas -- which convert electromagnetic fields at optical frequencies directly to electrical current - to operate low-power devices such as temperature sensors. (2018-01-26)

'Nanobulb' helps see subwavelength-size objects with ordinary microscope
Scientists from ITMO University have proven that a silicon-gold nanoparticle can act as an effective source of white light when agitated by a pulse laser in IR band. One such (2018-01-25)

Researchers from TU Delft combine spintronics and nanophotonics in 2-D material
Researchers from the Kavli Institute of Nanoscience at TU Delft, working with the Netherlands Organisation for Scientific Research's AMOLF institute, have found a way to convert the spin information into a predictable light signal at room temperature. The discovery brings the worlds of spintronics and nanophotonics closer together and might lead to the development of an energy-efficient way of processing data, in data centres, for example. (2018-01-25)

Could underwater sound waves be the key to early tsunami warnings?
Mathematicians have devised a way of calculating the size of a tsunami and its destructive force well in advance of it making landfall by measuring fast-moving underwater sound waves, opening up the possibility of a real-time early warning system. (2018-01-24)

Century of data shows sea-level rise shifting tides in Delaware, Chesapeake bays
The warming climate is expected to affect coastal regions worldwide as glaciers and ice sheets melt, raising sea level globally. For the first time, an international team has found evidence of how sea-level rise already is affecting high and low tides in both the Chesapeake and Delaware bays, two large estuaries of the eastern United States. (2018-01-24)

Quantum control
An international team consisting of Russian and German scientists has made a breakthrough in the creation of seemingly impossible materials. They have managed to create the world`s first quantum metamaterial which can be used as a control element in superconducting electrical circuits. (2018-01-23)

Researchers use sound waves to advance optical communication
Illinois researchers have demonstrated that sound waves can be used to produce ultraminiature optical diodes that are tiny enough to fit onto a computer chip. These devices, called optical isolators, may help solve major data capacity and system size challenges for photonic integrated circuits, the light-based equivalent of electronic circuits, which are used for computing and communications. (2018-01-22)

Inverse-design approach leads to metadevices
A Northwestern University research team used inverse design principles and a 3-D printer to create highly efficient broadband metadevices at millimeter-wave frequencies that could prove revolutionary for consumer products, defense, and telecommunications. (2018-01-22)

Neutron-star merger yields new puzzle for astrophysicists
The afterglow from the distant neutron-star merger detected last August has continued to brighten - much to the surprise of astrophysicists studying the aftermath of the massive collision that took place about 138 million light years away and sent gravitational waves rippling through the universe. New observations from NASA's orbiting Chandra X-ray Observatory, reported in Astrophysical Journal Letters, indicate that the gamma ray burst unleashed by the collision is more complex than scientists initially imagined. (2018-01-18)

Building blocks to create metamaterials
An international team, led by Chiara Daraio, uses techniques from quantum mechanics to create a system for engineering how metamaterials will interact with waves. (2018-01-17)

Black hole spin cranks-up radio volume
Statistical analysis of supermassive black holes suggests that the spin of the black hole may play a role in the generation of powerful high-speed jets blasting radio waves. By analyzing nearly 8000 quasars from the Sloan Digital Sky Survey, research team found that the oxygen emissions are 1.5 times stronger in radio loud quasars than in radio quiet quasars. This implies that spin is an important factor in the generation of jets. (2018-01-12)

Map of ionospheric disturbances to help improve radio network systems
The paper, titled (2018-01-12)

The atomic dynamics of rare everlasting electric fields
Researchers have discovered the atomic mechanisms that give the unusual material yttrium manganite its rare magnetic and electric properties. All it took was ricocheting neutrons off the atoms of a sample of the material heated to 3,000 degrees Fahrenheit. (2018-01-10)

Black hole breakthrough: New insight into mysterious jets
Advanced simulations created with one of the world's most powerful supercomputers show the jets' streams gradually change direction in the sky, or precess, as a result of space-time being dragged into the rotation of the black hole. (2018-01-10)

Fast radio bursts 'twists and shouts' help scientists determine source of cosmic blasts
An international group of astronomers has found that the Cornell University-discovered fast radio burst FRB 121102 -- a brief, gigantic pulse of radio waves from 3 billion light years away -- passes through a veil of magnetized plasma. This causes the cosmic blasts to 'shout and twist,' which will help the scientists determine the source. (2018-01-10)

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