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Coating cancels acoustic scattering from odd-shaped objects
Researchers from the US Naval Research Laboratory and the University of Texas at Austin have applied to acoustic waves the concept of 'scattering cancellation,' which has long been used to systematically cancel the dominant scattering modes of electromagnetic waves off objects. The work provides fundamental new tools to control acoustic scattering and should improve the ability to make acoustic measurements in the laboratory. It is described in this week's Journal of Applied Physics. (2015-10-27)

Making waves
The American Institute of Mathematics announces that Soundararajan and Roman Holowinsky have proven a significant version of the quantum unique ergodicity conjecture. Their work, based in the pure mathematics area of number theory, illuminates deep connections between classical and quantum physics in what is being hailed as one of the best theorems of the year. (2008-10-10)

Fulbright grant for upper atmosphere work in Greece
Michael C. Kelley, a professor in Cornell University's School of Electrical and Computer Engineering, has been awarded a Fulbright grant to continue his research in Greece during the 2002-2003 academic year. Kelley is the James A. Friend Family Distinguished Professor of Engineering at Cornell. (2002-09-04)

New research adds to understanding of conscious awareness
Two new studies by faculty at Georgetown University Medical Center and colleagues shed new light on the brain mechanisms underlying conscious awareness. The studies are published in the current issue of the journal Neurology. (2002-09-25)

Quantum goes massive
An astrophysics experiment in America has demonstrated how fundamental research in one subject area can have a profound effect on work in another as the instruments used for the Laser Interferometer Gravitational-Wave Observatory pave the way for quantum experiments on a macroscopic scale. (2009-07-16)

NC State lands grant to research acoustics to detect landmines, bombs
Imagine a tool that uses sound waves to help identify land mines, roadside bombs or suicide bombers. North Carolina State University has received a grant from the US Office of Naval Research to turn that idea into a reality. (2010-09-24)

Magnetic field uses sound waves to ignite sun's ring of fire
Sound waves escaping the sun's interior create fountains of hot gas that shape and power a thin region of the sun's atmosphere which appears as a ruby red (2007-05-29)

What would a tsunami in the Mediterranean look like?
A team of European researchers have developed a model to simulate the impact of tsunamis generated by earthquakes and applied it to the Eastern Mediterranean. The results show how tsunami waves could hit and inundate coastal areas in southern Italy and Greece. The study is published Aug. 27 in Ocean Science, an open-access journal of the European Geosciences Union. (2015-08-27)

Density-near-zero acoustical metamaterial made in China
When a sound wave hits an obstacle and is scattered, the signal may be lost or degraded. But what if you could guide the signal around that obstacle, as if the interfering barrier didn't even exist? Recently, researchers at Nanjing University in China created a material from polyethylene membranes that does exactly that. (2015-07-14)

UNH researchers prove existence of new type of electron wave
New research led by University of New Hampshire physicists has proved the existence of a new type of electron wave on metal surfaces: The acoustic surface plasmon, which will have implications for developments in nano-optics, high-temperature superconductors and the fundamental understanding of chemical reactions on surfaces. The research, led by Bogdan Diaconescu and Karsten Pohl of UNH, is published in the July 5 issue of the journal Nature. (2007-07-04)

Family's economic situation influences brain function in children
Children of low socioeconomic status work harder to filter out irrelevant environmental information than those from a high-income background because of learned differences in what they pay attention to, according to new research published in the open access journal Frontiers in Human Neuroscience. (2012-11-28)

Historical records help uncover new mechanism in deadly 1906 Taiwan quake
Researchers reexamining historical seismograms from the 1906 Meishan earthquake have uncovered a new mechanism for the quake, one of the deadliest to ever strike Taiwan. (2018-05-01)

Generating broadband terahertz radiation from a microplasma in air
Researchers have shown that a laser-generated microplasma in air can be used as a source of broadband terahertz radiation. In a paper published this week in Optica, they demonstrate that an approach for generating terahertz waves using intense laser pulses in air can be done with much lower power lasers, a major challenge until now. Lead author Fabrizio Buccheri explains that they exploited the underlying physics to reduce the necessary laser power for plasma generation. (2015-04-24)

Mind-controlled toys: The next generation of Christmas presents?
The next generation of toys could be controlled by the power of the mind, thanks to research by the University of Warwick. (2016-12-15)

UI researchers make first measurements of the solar wind termination shock
Two University of Iowa space physicists report that the Voyager 2 spacecraft, which has been traveling outward from the sun for 31 years, has made the first direct observations of the solar wind termination shock, according to a paper published in the July 3 issue of the journal Nature. (2008-07-02)

The walls can talk: New optical technique extracts audio from video
A simple new optical technique to extract audio information from silent high-speed video has been demonstrated by researchers at the Catholic University of America. The work, based on an image-matching process, is reported in an article published last month in the journal Optical Engineering, published by SPIE, the international society for optics and photonics. (2014-12-04)

Sleep difficulties in children with Autism caused by shallower brain waves -- Ben-Gurion U.
'For the first time, we found that children with more serious sleep issues showed brain activity that indicated more shallow and superficial sleep,' says BGU Prof. Ilan Dinstein, head of the National Autism Research Center of Israel and a member of BGU's Department of Psychology. 'We also found a clear relationship between the severity of sleep disturbances as reported by the parents and the reduction in sleep depth.' (2020-01-06)

NUS engineers develop low-cost, flexible terahertz radiation source for fast, non-invasive screening
A research team led by Associate Professor Yang Hyunsoo and Dr. Wu Yang from the NUS Faculty of Engineering and NUS Nanoscience and Nanotechnology Institute has successfully developed flexible, high performance and low-power driven terahertz (THz) emitters that could be mass-produced at low cost. This novel invention is a major technological breakthrough and addresses a critical challenge for industrial application of THz technology. (2017-01-30)

Theoretical blueprint for invisibility cloak reported
Using a new design theory, researchers at Duke University's Pratt School of Engineering and Imperial College London have developed the blueprint for an invisibility cloak. Once devised, the cloak could have numerous uses, from defense applications to wireless communications, the researchers said. (2006-05-25)

Weather, waves and wireless: Super strength signalling
Leicester scientist explains how radio waves traveling over the sea can have enhanced signal strengths. (2008-05-16)

Wireless system can power devices inside the body
MIT researchers have developed a new way to power and communicate with devices implanted deep within the human body. Such devices could be used to deliver drugs, monitor conditions inside the body, or treat disease by stimulating the brain with electricity or light. (2018-06-04)

UK scientist gambles on gravitational waves
At the Institute of Physics conference Photon 04 today, Professor Jim Hough, one of the UK's leading scientists, revealed that he thinks high street bookmakers are crazy to be offering odds of 100-1 on whether Gravitational Waves (wrinkles in relativity) will be discovered before 2010. He has placed a personal bet of £25 - the maximum Ladbrokes allowed him to stake. The available odds were quickly cut from an initial offering of 500-1. (2004-09-08)

U. of Colorado research team traces origins, uplift of California's highest mountains
A new study of California's southern Sierra Nevada range by a University of Colorado at Boulder research team has located a massive body of rock that sank into Earth's mantle some 3.5 million years ago, allowing the mountains to pop up. (2004-07-29)

Pinning Down The Position Of The Solar Dynamo
Stanford scientists report identifying the position of the solar dynamo, the layer where the magnetic fields that control the mysterious 11-year sunspot cycle and other large-scale events on the Sun's surface. An AGU meeting report (1996-12-18)

Breakthrough enables storage and release of mechanical waves without energy loss
A new discovery by researchers at the Advanced Science Research Center at The Graduate Center, CUNY could allow light and sound waves to be stored intact for an indefinite period of time and then direct it toward a desired location on demand. Such a development would greatly facilitate the ability to manipulate waves for a variety of desired uses, including energy harvesting, quantum computing, structural-integrity monitoring, information storage, and more. (2019-08-30)

Spin lasers facilitate rapid data transfer
Engineers have developed a novel concept for rapid data transfer via optical fibre cables. In current systems, a laser transmits light signals through the cables and information is coded in the modulation of light intensity. The new system, a semiconductor spin laser, is based on a modulation of light polarisation instead. The study demonstrates that spin lasers have the capacity of working at least five times as fast as the best traditional systems, while consuming only a fraction of energy. (2019-04-04)

New details of earth's internal structure emerge from seismic data
The boundary between Earth's molten outer core and the solid mantle may not be as sharply defined as scientists once thought. By analyzing earthquake waves that bounce off the core-mantle boundary, researchers have found evidence of a thin zone where the outermost core is more solid than fluid. (2001-11-29)

Researchers links coastal nuisance flooding to special type of slow-moving oce
A team of international researchers has found a link between seasonal fluctuations in sea level to a long-time phenomenon -- Rossby Waves. And this connection may lead to a new tool to help (2018-07-05)

Do large human crowds exhibit a collective behavior?
By observing the collective movement of thousands of Chicago Marathon runners queueing up to the starting line, researchers find that the motion of large crowds is fluid-like and mathematically predictable. (2019-01-03)

Pair of supermassive black holes discovered on a collision course
Astronomers have spotted a pair of supermassive black holes on a collision course in a galaxy 2.5 billion light-years away. Coincidentally, the pair will begin producing gravitational waves in roughly 2.5 billion years, the researchers estimate. The duo can be used to estimate how many supermassive black hole pairs are detectable in the nearby, present-day universe and when the historic first detection of the background 'hum' of their gravitational waves will be made. (2019-07-10)

Earth's Inner Core Not A Monolithic Iron Crystal, Say UC Berkeley Seismologists
A new analysis of seismic waves traveling through the center of the Earth disproves a neat hypothesis that many geophysicists had secretly hoped was true, that the planet's inner core is a perfectly aligned mass of iron crystals nearly 1,500 miles across (1996-11-08)

NASA-NOAA satellite finds overshooting tops, gravity waves in Tropical Storm Nestor
NASA-NOAA's Suomi NPP satellite provided night-time and infrared views of developing Tropical Storm Nestor in the Gulf of Mexico and found over-shooting cloud tops and gravity waves. When the satellite passed over the potential tropical depression early on Oct. 18, it was consolidating. Less than 12 hours later, it became a tropical storm. (2019-10-18)

Aus gravitational waves world-first discovery
An Australian group was the first in the world to confirm the radio emission from a gravitational wave. University of Sydney Associate Professor Tara Murphy was in the US with a collaborator when they saw the gravitational wave announcement come through on the private LIGO email list. 'We immediately rang our team in Australia and told them to get onto the CSIRO telescope as soon as possible,' she said. Watch the 30-sec video explainer. (2017-10-16)

Getting therapeutic sound waves through thick skulls
Ultrasound brain surgery has enormous potential for the treatment of neurological diseases and cancers, but getting sound waves through the skull and into the brain is no easy task. To address this problem, a team of researchers from the University of California, Riverside has developed a ceramic skull implant through which doctors can deliver ultrasound treatments on demand and on a recurring basis. (2017-08-02)

Scientists twist sound with metamaterials
A Chinese-US research team is exploring the use of metamaterials -- artificial materials engineered to have exotic properties not found in nature -- to create devices that manipulate sound in versatile and unprecedented ways. In Applied Physics Letters, the team reports a simple design for a device, called an acoustic field rotator, which can twist wave fronts inside it so that they appear to be propagating from another direction. (2014-02-25)

Research captures how human sperm swim in 3D
Using state-of-the-art 3D microscopy and mathematics, Dr Hermes Gadêlha from the University of Bristol, Dr Gabriel Corkidi and Dr Alberto Darszon from the Universidad Nacional Autonoma de Mexico, have reconstructed the movement of the sperm tail in 3D with high-precision. (2020-08-13)

Engineers ride 'rogue' laser waves to build better light sources
A freak wave at sea is a terrifying sight. Seven stories tall, wildly unpredictable, and incredibly destructive, such waves have been known to emerge from calm waters and swallow ships whole. But rogue waves of light -- rare and explosive flare-ups that are mathematically similar to their oceanic counterparts -- have recently been tamed by a group of researchers at the University of California, Los Angeles. (2009-03-05)

Do black holes have hair?
Black holes may be less simple and (2013-09-30)

Impact study: Princeton model shows fallout of a giant meteorite strike
Seeking to better understand the level of death and destruction that would result from a large meteorite striking the Earth, Princeton University researchers have developed a new model that can not only more accurately simulate the seismic fallout of such an impact, but also help reveal new information about the surface and interior of planets based on past collisions. (2011-10-19)

Iron in the Earth's core weakens before melting
The iron in the Earth's inner core weakens dramatically before it melts, explaining the unusual properties that exist in the moon-sized solid center of our planet that have, up until now, been difficult to understand. (2013-10-10)

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