Metasurfaces for manipulating terahertz waves
THz waves have a plethora of applications ranging from biomedical and medical examinations, imaging, environmental monitoring, to wireless communications, because of abundant spectral information, low photon energy, strong penetrability, and shorter.....»»
Low-cost flexible metasurfaces to increase the efficiency of optoelectronic devices
Metasurfaces are two-dimensional counterparts of metamaterials, which are artificial materials that possess unusual characteristics. With a variety of fascinatingly innovative and diverse uses, these specially-prepared surfaces with engineered patter.....»»
Geophysicists find link between seismic waves called PKP precursors and strange anomalies in Earth"s mantle
For the decades since their discovery, seismic signals known as PKP precursors have challenged scientists. Regions of Earth's lower mantle scatter incoming seismic waves, which return to the surface as PKP waves at differing speeds......»»
New AI tool captures how proteins behave in context
A fish on land still waves its fins, but the results are markedly different when that fish is in water. Attributed to renowned computer scientist Alan Kay, the analogy is used to illustrate the power of context in illuminating questions under investi.....»»
Mediterranean Sea temperatures match 2023 records
The temperatures of the Mediterranean Sea in recent days have reached heat records set last summer, the main Spanish maritime research center told AFP Tuesday, with marine heat waves in some places exceeding 30 degrees Celsius......»»
Study reveals urban trees suffer more from heat waves and drought than their rural counterparts
A recently published study in Ecological Applications details how trees in New York City and Boston are more negatively impacted by heat waves and drought than trees of the same species in nearby rural forests. The finding, made by researchers at the.....»»
Advance in stem cell therapy: New technique for manipulating stem cells opens door to novel treatments
A new technique developed by McGill researchers for mechanically manipulating stem cells could lead to new stem cell treatments, which have yet to fulfill their therapeutic potential......»»
How this summer"s heat waves may impact the economy
This sweltering summer has brought record-breaking high temperatures to 63 countries, all but cementing 2024's status as the world's hottest year on record (even though we're barely past the halfway point). Such extreme weather trends are bound to ha.....»»
10 years ago, this disaster movie delivered as much summer fun as Twisters
Twisters is breaking box office records in 2024, but this similar disaster movie about a deadly storm made some waves 10 years ago as a late summer hit......»»
Using historical radar data to map changes in urban environments
Synthetic aperture radar (SAR) is a type of remote sensing from satellites that uses the reflection of radio waves to relay information about the surface of the earth. This reflection, or backscatter, is responsive to physical properties, such as rou.....»»
Most existing heat wave indices fail to capture heat wave severity, experts report
Even though climate change is bringing more frequent and severe heat waves, there is no standard, global way to measure heat-wave severity, and existing indices have different thresholds for defining dangerous heat-stress conditions......»»
Save our waves: Surfing pumps $2.71 billion into the Australian economy and boosts well-being
Ever since Polynesian pioneers took to the ocean on wooden rafts, people have been hooked on riding waves. Today, surfing is one of the world's fastest-growing sports and one of the latest additions to the Olympic games......»»
Japan sees hottest July since records began
Japan sweltered through its hottest July since records began 126 years ago, the weather agency said, as extreme heat waves fueled by climate change engulfed many parts of the globe......»»
Can quantum particles mimic gravitational waves?
When two black holes collide, space and time shake and energy spreads out like ripples in a pond. These gravitational waves, predicted by Einstein in 1916, were observed for the first time by the Laser Interferometer Gravitational-Wave Observatory (L.....»»
Extreme heat in India: A crisis on the rise
As global temperatures continue to rise, India is grappling with increasingly severe heat waves. As early as April, many Indian cities, including New Delhi, the capital, have experienced record temperatures above 115 degrees Fahrenheit......»»
The climate is changing so fast, we haven"t seen how bad extreme weather could get
Extreme weather is by definition rare on our planet. Ferocious storms, searing heat waves and biting cold snaps illustrate what the climate is capable of at its worst. However, since Earth's climate is rapidly warming, predominantly due to fossil fue.....»»
Giant waves, monster winds and Earth"s strongest current: Why the Southern Ocean is a global engine room
The Southern Ocean is wild and dynamic. It experiences Earth's strongest winds and largest waves. It is home to city-sized icebergs and the biggest ocean current on the globe, as well as tiny turbulent flows that fit inside a teacup......»»
Why the solar corona is so much hotter than sun"s surface
In a new study published in The Astrophysical Journal, a researcher from The University of Alabama in Huntsville (UAH), a part of the University of Alabama System, explores critical aspects of a phenomenon called kinetic Alfvén waves (KAWs) to provi.....»»
New study simulates gravitational waves from failing warp drive
Imagine a spaceship driven not by engines, but by compressing the spacetime in front of it. That's the realm of science fiction, right? Well, not entirely. Physicists have been exploring the theoretical possibility of "warp drives" for decades, and a.....»»
3D models show dolphins already used narrow-band sound waves for orientation 5 million years ago
Senckenberg researcher Dr. Rachel Racicot and her former student Joyce Sanks from Vanderbilt University have examined the inner ear of the extinct dolphin genus Parapontoporia. In their study, published in the journal The Anatomical Record, they show.....»»
New self-powered electrostatic tweezer enhances object manipulation and microfluidics
In a study published in Device has reported a new self-powered electrostatic tweezer that offers superior accumulation and tunability of triboelectric charges, enabling unprecedented flexibility and adaptability for manipulating objects in various wo.....»»