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Tag Archives: waves

How fast is the universe expanding? Measurement of cosmic expansion with radio astronomy and gravitational waves

Artist’s impression of the explosion and eruption of gravitational waves that occur when a pair of superdense neutron stars collide. New observations with radio telescopes show that such events can be used to measure the rate of expansion of the universe. Credit: NRAO / AUI / NSF How fast is the universe expanding? We don’t know for sure. Astronomers study …

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Massive volcanism sent large waves of carbon into the oceans for thousands of years – far outstripped by humans

A living foraminifera, a type of marine plankton that researchers have grown in laboratory culture. In order to reconstruct the past climate, fossilized specimens are collected from deep-sea sediments. Photo credits: Bärbel Hönisch / Lamont-Doherty Earth Observatory The analogue closest to modern times is no longer very close, according to the results of the study. A new ancient study, believed …

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Sound waves replace human hands in Petri dish experiments

Three proof-of-concept experimental set-ups using acoustic tweezers in petri dishes. From left to right a standing pattern for sorting, a whirlpool for concentration and high-frequency beam-like waves for concentration and stimulation. Photo credit: Tony Huang, Duke University Mechanical engineers at Duke University have demonstrated a number of prototypes for manipulating particles and cells in a Petri dish using sound waves. …

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National Hurricane Center: Three tropical waves that develop in the Atlantic as the peak of the hurricane season approaches

RALEIGH – The National Hurricane Center monitors three tropical waves in the Atlantic storm basin, at least one of which is very likely to be a tropical depression. The most worrying tropical wave is over the eastern Atlantic. It’s just a disorganized group of showers and thunderstorms right now, but it could be more by next week. The system moves …

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Black hole “hair” could be detected using waves in spacetime

The information trapped in black holes could be detected by feeling their “hair”, new research suggests. Black holes are celestial objects with such massive gravity that not even light can escape from their clutches when it crosses the event horizon or the point of non-return. The black holes’ event horizons hold secrets deep within them – secrets that could completely …

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Recovery from rotating power outages amid heat waves is underway

items Power outages are expected to be fully recovered in San Jose on Friday. SAN RAFAEL, CALIFORNIA – – Power restoration is underway after rotating outages ordered across the state of California on Friday night that left thousands without power in a heatwave. According to Pacific Gas and Electric, the state-owned network operator, the California Independent System Operator (CAISO), has …

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WSJ waves Trump’s embrace of the “Barack Obama method” of government by order of the executive

President Trump used the “Barack Obama method” by extending federal unemployment benefits and introducing payroll tax leave through a series of executive orders, “one of which extends the law in ways that a future progressive president is sure to cite as a precedent.” . The Wall Street Journal editors complained Monday. The newspaper paid tribute to the president for joining …

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Preserving the integrity of sound waves

The experiment is the first to show a strong topological order for sound derived from time modulations, paving the way for improvements in ultrasound imaging, sonar, and electronic systems using surface wave technology. A breakthrough in physics and engineering, researchers from the Photonics Initiative of the Graduate Center’s Advanced Science Research Center, CUNY (CUNY ASRC), and Georgia Tech presented the …

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