Articles tagged with Wave Pressure
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A new study by Colorado State University reveals that seismic signals show a growing intensity in ocean waves since the late 20th century, attributed to global warming. The research indicates that storms are becoming more intense and wave energy is increasing globally, posing a serious threat to coastal ecosystems and infrastructure.
An international team found that volcanic eruptions can produce equatorial plasma bubbles in the ionosphere, disrupting satellite-based communications. The Tonga eruption triggered an irregular structure of electron density across the equator, delaying radio waves and degrading GPS performance.
A mobile application utilizing Python and a single-element ultrasound transducer has been developed for photoacoustic tomography (PAT) image reconstruction. The application successfully reconstructs high-quality images with signal-to-noise ratio values above 30 decibels, making it suitable for point-of-care diagnosis in low-resource se...
Researchers have confirmed the existence of Pekeris waves, a type of atmospheric wave theorized in 1937 but never proven to occur naturally. The waves were detected following the 2022 Tonga volcanic eruption using state-of-the-art observational data and computer simulations.
Researchers at Nagoya University used satellite data to track ionospheric disturbances after the 2022 Tonga underwater eruption, detecting earlier signs of tsunami waves. The team found that electromagnetic waves traveled 1000 km/s, much faster than air pressure waves, allowing for potentially quicker tsunami warnings.
Computational fluid dynamics simulations reveal the formation of shock wave patterns during champagne cork popping. The study's findings could provide insight into supersonic flow behavior in various applications.
KAUST researchers have found that even low-speed solid-liquid impacts can cause cavitation and generate damaging shock waves. This challenges previous assumptions about the effects of such impacts. The team used high-speed cameras to study the impact of a flat-bottomed cylinder on a pool of liquid, observing that pressures below a cert...
Researchers have developed a custom finger clip device that measures blood pressure and other vital signs like heart rate, oxygen saturation, body temperature, and respiratory rate. The device uses photoplethysmography sensors and achieves an accuracy rate of about 90% for systolic blood pressure.
Lesions in white matter carry messages between neurons, damaging it and leading to cognitive deficits. Researchers found that strain on ventricular walls explains where lesions develop in the aging brain.
Researchers at NIST demonstrate a faster and more accurate way to calibrate microphones using lasers. The new technique surpasses the current industry standard, offering potential for commercial applications in industries like factories and power plants.
A research team found an unusual competition between charge density wave (CDW) and superconductivity in CsV3Sb5. They discovered that increasing pressure can suppress the CDW state, leading to an abnormal superconducting phase diagram with a double dome shape.
Researchers at MIT found that a combination of warmer ocean temperatures and changes in air pressure patterns contribute to the Mediterranean region's projected drought. The study could refine global climate models and provide greater certainty for water resource management and agriculture in the affected areas.
Researchers found that classical laws of gas mixture behavior fail to apply in the presence of shock waves, affecting combustion, explosions, and supersonic jets. Further study is needed to explore the scope of the problem and develop a new theory explaining the observations.
Researchers developed a theory that sheds light on detonation formation at the heart of supernovae explosions, demonstrating the process using experiments and numerical simulations. The study predicts the conditions for detonation formation in Type Ia supernovae, providing insight into fundamental aspects of physical processes.
Physicists have created a device that can detect and measure quantum radiation pressure noise, a significant source of uncertainty in gravitational wave detectors. The breakthrough aims to improve the sensitivity of next-generation detectors, potentially leading to more accurate detections.
A tropical wave is bringing heavy rainfall and gusty winds to islands in the Atlantic Ocean and northeastern Caribbean Sea. The National Hurricane Center predicts that the system could develop into a tropical depression, posing danger to the Bahamas and southeastern United States.
Researchers at RIKEN and the University of Bristol have experimentally verified that light exerts a new type of optical force proportional to its circular polarization. The team used an extremely precise nano-cantilever to measure this force, which is much weaker than usual radiation pressure.
NASA-NOAA satellites confirmed Tropical Storm Grace had weakened into an open wave of low pressure, with wind data from RapidScat confirming the degeneration. The remnants are moving westward near 18 mph and expected to produce gusty winds and showers over the Lesser Antilles.
Tropical Depression Fred is weakening due to strong upper-level winds, while a new low-pressure area called System 91L is moving westward across the tropical Atlantic. Forecasters expect System 91L to have a 40% chance of development in the next two days and 60% in five days.
Danny degenerated into an elongated area of low pressure near the Windward Islands, producing 2-4 inches of rain over several islands. A second low-pressure system is developing in the eastern Atlantic Ocean, with potential for tropical depression or storm formation
Researchers discovered that cavitation bubbles can pull in nearby particles like black holes, potentially leading to new cleaning methods. The effect depends on particle size and distance from the bubble, with smaller particles moving faster towards the collapsing bubble.
Scientists are conducting experiments to study the motions, forces, and pressures generated by waves on planing-hull boats. This research aims to reduce weight while maintaining structural adequacy, enabling Navy boats to travel faster in higher seas states.
The Stanford team developed a wireless pressure sensor that can detect subtle changes in pressure using radio waves. The technology has potential applications in monitoring brain pressure in lab mice and could lead to the creation of 'skin' for prosthetic devices.
Researchers at Berkeley Lab have developed a technique for generating acoustic bottles that can bend sound waves along prescribed convex trajectories. This technology has the potential to revolutionize various applications, including advanced ultrasonic imaging and therapy, acoustic cloaking, and levitation.
A train of five tropical lows is stretching across the Pacific Ocean, featuring remnants of Tropical Storm Genevieve and newly developed Tropical Storm Iselle. The system includes three other low-pressure areas, with a well-developed Iselle near the end of the train.
A NASA satellite captured images of Tropical Depression 2, which had weakened and degenerated into a tropical wave. The depression's remnants are expected to move through the Lesser Antilles, bringing gusty winds and showers.
Researchers have experimentally re-created conditions deep inside giant planets like Jupiter and Saturn using the National Ignition Facility. They successfully compressed diamond to unprecedented densities, providing new constraints for dense matter theories and planet evolution models.
Researchers at the University of Washington have designed a low-power sensor to track eye pressure changes and monitor for glaucoma. The sensor would be embedded with an artificial lens during cataract surgery and transmit data wirelessly, allowing for real-time tracking and potentially preventing vision loss.
Researchers analyzed the Chile earthquake of February 2010, finding that fluid pressure in rocks affects earthquake rupture processes. The study revealed that mechanical coupling between plates controls stress build-up and seismic energy release, with fluid pressure variations linked to subduction zone dynamics.
The 16th Atlantic tropical depression has formed northeast of the Bahamas and is expected to move southwest, potentially affecting the region. The National Hurricane Center tracks its movement and potential impact.
A study published in JAMA Network found that increased aortic stiffness is associated with a higher risk of new hypertension. The researchers suggest that vascular stiffness may be a precursor to hypertension, rather than the result of it. The study's findings have significant implications for preventing and treating hypertension.
Tropical Storm Kirk is strengthening due to powerful thunderstorms and will likely turn into a hurricane over the weekend, according to NASA infrared imagery.
A new characterization method using lasers and acoustic waves has provided scientists with a capability to detect buried defects deep inside materials with unprecedented precision. This new technique reveals that the amount of damage caused by radiation in electronic materials may be at least ten times greater than previously thought.
NASA's GOES-13 satellite captured an image of Tropical Depression Bret, Tropical Storm Cindy, and a low-pressure area associated with a tropical wave in the Caribbean. The storm system is located in two ocean basins, with Bret and Cindy racing through the North Atlantic and Hurricane Dora weakening in the eastern Pacific.
A new blood pressure measurement device using CASP has been developed to provide more accurate readings than current methods. The device, invented by scientists at the University of Leicester and HealthSTATS International, measures pressure close to the heart, leading to better treatment decisions and patient outcomes.
Researchers recreated high pressures using a diamond-anvil cell and found unusual properties in iron-rich magnesium-iron oxide minerals. These findings suggest that ultra-low velocity zones (ULVZs) at the core-mantle boundary may be composed of solid, compositionally distinctive rocks rather than liquid-bearing materials.
Researchers at the University of Liverpool have developed a 'cloak' that can control surface waves, reducing damage from earthquakes. The technology involves concentric rings of plastic that deflect waves away from protected areas, offering potential protection for densely populated regions.
Researchers at the University of Florida have successfully reduced the Casimir force by altering the surface of metal plates, which could help mitigate stiction in microelectromechanical devices. The findings could pave the way for further miniaturization and potentially impact various consumer products.
Researchers measured changes in rock stress affecting seismic wave speed at depths where earthquakes occur, detecting 'preseismic' changes before two earthquakes. The findings could lead to a better understanding of fault-zone stress and improve earthquake prediction.
Simulations show that compression waves change the atomic arrangement of glass, resulting in a denser and less brittle material. The study, published in Physical Review Letters, may have implications for optimizing glass properties.
A Los Alamos researcher has calculated the frequency of meteor encounters with the atmosphere, finding that individual monitoring stations would see about five meteor signals a year. This research will help improve the accuracy and reliability of nuclear test detection systems.
Researchers establish superconductivity in lithium at pressures greater than 30 GPa, with critical temperatures ranging from 9 K to 16 K. This finding contradicts theory and sparks interest in searching for high-temperature superconductivity in light element compounds.
A NASA study has linked the transport of sea ice through Fram Strait to the position and phase of the longest sea level pressure wave circling the Earth at polar latitudes. The study found that variations in this wave, called 'wave 1', explain up to 70% of Arctic ice export through the strait.
Researchers observed statistically significant amounts of tritium above background in cavitation experiments, suggesting the possibility of nuclear reactions. The findings are based on a collaboration that used high-energy neutrons to create bubbles in liquid, which can result in light emissions and potentially nuclear reactions.