Articles tagged with Shock Waves
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Automated external defibrillators (AEDs) in private homes show effectiveness in improving patient outcomes for those with shockable rhythms during cardiac arrest. However, considering the rarity of cardiac arrest at home and current AED pricing, general purchase is not deemed cost-effective.
Researchers found yeast cells can withstand shock waves and toxic perchlorate salts, simulating Martian conditions. The yeast's ability to produce ribonucleoprotein condensates helps protect against stress, making it a model for astrobiology research and potential life support systems in space.
Computational models now accurately represent very weak shock waves, which are crucial in flows involving shock waves. The final state of a moving shock wave can be classified into three regimes: dissipated, transitional and thinly captured.
Research teams at USTC develop a high-intensity multifunctional shock tube device with variable cross-section and curved wall surfaces. They successfully generate strong converging shock waves and overcame airflow choking problems, enabling experimental research on fluid interfaces and turbulent mixing.
Deborah Levin and her Ph.D. student Irmak Taylan Karpuzcu conducted the first 3D simulations of hypersonic flows, exposing new disturbances in the interaction between gases and surfaces. The findings provide insights into the design considerations for hypersonic vehicles.
Researchers discovered that mantis shrimp's armored clubs selectively block high-frequency sound waves to prevent damage. The layered patterns act as a shield against vibrations, enabling the shrimp to preserve its striking ability over multiple impacts.
Researchers developed a novel method for carbon fiber recycling that leverages Joule heat generation, thermal stress, and expansion forces to separate fibers without chemicals. The technique is more effective than traditional methods, preserving longer fibers with higher strength and reducing environmental impact.
Scientists have come closer to understanding the acceleration of electrons in collisionless shock environments. A new study using satellite observations from NASA's MMS and THEMIS/ARTEMIS missions found that electrons can be accelerated to high energies through the interaction of multiple processes across different scales.
Scientists have captured the first-ever image of an S-shaped jet coming from a confirmed neutron star, providing strong evidence for precessing jets. The discovery was made using the MeerKAT telescope and reveals valuable insights into the extreme physics behind the launching of the jet.
Astronomers have discovered an enormous circular radio feature around a galaxy, dubbed the Cloverleaf, which was created by clashing groups of galaxies. The XMM-Newton satellite has detected X-ray emission associated with this structure for the first time, revealing clues about its formation and the merger process.
Researchers at the Universiteit van Amsterdam triggered mini-earthquakes in a lab by applying a small seismic wave to a granular material. The study shows that these events can be understood using laboratory-scale frictional experiments, and its findings are relevant for understanding remote earthquake triggering in larger faults.
Researchers unveil previously unknown type of shockwave within TDEs, confirming that shock dissipation powers the brightest phases. The study paves the way for precise measurements of crucial black hole properties and testing Einstein's predictions in extreme environments.
Scientists use new photography technique to observe interaction between biological cell and shock wave, revealing high-speed phenomena. The technology has potential applications in science, medicine, and industry.
A new study reveals that holographic haptic displays create diffuse and faint tactile sensations due to widespread vibration patterns in the skin. The researchers discovered a phenomenon known as constructive interference that amplifies shock waves, leading to reduced spatial precision and clarity.
Researchers measured noise levels at locations around the launch pad, finding maximum sound levels exceeded predicted values by nearly 20 decibels. The study's findings will help validate and improve existing noise prediction models to protect equipment and surrounding environments.
A team of researchers from Vietnam and Korea investigated the collapse of a spherical bubble near an oscillating wall using a two-phase flow model. The study revealed significant jet formation, higher pressure peaks, and faster collapse times compared to fixed wall scenarios.
PhD candidate Benjamin Stavnar Elveli's research investigates how different types of steel plates behave under combined ballistic impacts. His work aims to establish guidelines for lightweight, resistant structures. The study shows that simplified approaches can have weaknesses, highlighting the need for accurate computer simulations.
Researchers used density functional theory to investigate the mechanical properties of superionic ice XVIII, which is thought to make up a large part of Neptune and Uranus. The study found that dislocations in the crystal lattice produce shear, leading to macroscopic deformations and potentially influencing the planets' magnetic fields.
Researchers have developed a new spectroscopy technique called filament- and plasma-grating-induced breakdown spectroscopy (F-GIBS), which improves the sensitivity of trace metal detection in liquid samples. The technique uses fluid jets to analyze aqueous solutions and achieves high precision by avoiding detrimental influences of liqu...
NASA will conduct a series of flights over various communities to test its Quesst Mission Supersonic STEM Toolkit and measure sound levels. The mission hopes to inform an overland supersonic sound standard, potentially cutting flight times in half.
Researchers simulated a superheated steam dishwasher, finding it kills 99% of bacteria on a plate in just 25 seconds. The technology could also effectively remove food debris with shock waves, making it ideal for restaurants, hotels, and hospitals.
Researchers from the University of Arizona suggest that dying stars can forge carbon nanotubes in the envelopes of dust and gas surrounding them. This process involves the spontaneous formation of carbon nanotubes, which are highly structured rod-like molecules consisting of multiple layers of carbon sheets.
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.
A recent cohort study found that previous cardiovascular conditions, including heart surgery and heart failure, were associated with increased COVID-19 severity in US pediatric patients. The study highlights the importance of pre-existing medical conditions in determining COVID-19 outcomes in children.
Researchers at Shibaura Institute of Technology develop a fast and reliable method to detect defects in concrete structures using laser-induced plasma shock waves. The technique analyzes vibration patterns to identify Rayleigh waves, which can reveal the presence of cracks.
A new $1 million project at UCF aims to understand how raindrops interact with hypersonic shock waves. Researchers will use computer simulations and experiments to predict conditions for safe hypersonic travel. The knowledge gained could prevent damage and improve rocket launch accuracy.
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 developed a novel approach to study molecular fluctuations in one-dimensional shock waves, characterizing frequencies two orders of magnitude lower than those in boundary layer flow. The model correctly predicts fluctuations in high-speed vehicle shocks traveling at Mach 2-10.
Research finds that overlapping weather extremes increase global economic losses by an average of 20% due to supply shortages and price increases. Richer economies are hit harder, with China experiencing above-average losses of over 27%.
Scientists have detected new types of solar electron bursts accelerated by shock waves from coronal mass ejections. The Voyager spacecraft, over 14 billion miles from the sun, recorded these bursts, which were linked to cosmic rays and provided valuable insights into interstellar physics.
A recent study on spall fracture in metals revealed that certain materials can withstand secondary shocks with minimal damage, even without obvious signs of voids and cracks. The researchers found that a specific shock stress could recompact damaged copper targets and create new bonds between the broken surfaces.
Scientists created a scaled-down shock wave in the lab, mimicking supernova remnants. The study found that turbulent electromagnetic fields within the shock boost electron speeds, allowing particles to escape and gain even more speed.
Scientists at the DOE's Princeton Plasma Physics Laboratory have reproduced a process that occurs in space to deepen understanding of what happens when the Earth encounters the solar wind. The research aims to help forecast space weather and protect satellites that enable global communication.
A trio of satellites, including NASA's Fermi and NuSTAR space telescopes, observed a nova outburst in 2018 and captured direct evidence that most of the explosion's visible light arose from shock waves. The data confirmed that shock waves play a major role in powering some stellar explosions.
Biomedical engineers at Duke University found that historical helmets can provide similar protection from blast-induced brain trauma as modern ones. The French Adrian helmet demonstrated superior performance in protecting the brain from overhead blasts, with its crest feature potentially playing a key role.
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.
Shock wave physics studies material behavior under tremendous forces, with applications to nuclear and conventional weapons, astrophysics, and material synthesis. Sandia's achievements in shock wave science include the construction of the world's largest high frequency electromagnetic wave generator.
Researchers used plasma physics to study how volcanic ash modifies standing shock wave height, width, and lifetime. This discovery enables the tracking of standing shock waves in laboratory experiments, potentially leading to improved ash estimates and early predictions of hazardous plumes.
Researchers at Argonne National Laboratory successfully stabilized single atoms using record-high temperatures of up to 2000 K. The method enables the creation of stable single atom catalysts, which can remain in their place for unprecedented periods of time, maximizing atom-use efficiency and improving catalytic performance.
A new unified shock sensor developed by researchers at Yokohama National University can quickly and accurately detect and dissipate shock waves. The sensor combines imaging processing with compressible flow theory to predict the behavior of shock waves, offering improved efficiency and precision in computational fluid dynamics.
A team of engineers at UC San Diego has discovered a method to make materials more resilient against massive shocks using grooved patterns. The researchers found that these patterns can diminish the impacts of reflected shock waves, while initial transmitted shock waves showed inconclusive results.
Researchers used Stampede2 to study shock turbulence interactions at high turbulence intensities, exploring amplification factors, shock jumps and turbulent Mach number. The study aims to improve understanding of turbulent flows interacting with shock waves, enabling advancements in supersonic aircraft design and supernova research.
Researchers observed grain refinement and structural changes in polycrystalline aluminum foil under laser-driven shock wave loading. The technique enables studying microstructural deformation from atomic to mesoscale level.
Scientists developed a new 3D method to reconstruct Sun's shock waves, aiding in predicting extreme space weather. The approach combines stereo vision and noise filtering techniques to estimate wave front height and propagation rate.
Researchers at Kumamoto University have developed a novel e-waste recycling method using pulsed power, which successfully separates metal from plastic in CD-ROMs. The technique uses high-voltage electrical discharges to break down materials, resulting in efficient separation and minimal environmental impact.
Researchers from the Technion Israel Institute of Technology used exploding electrical wires underwater to generate shock waves, revealing a slower decay rate than predicted by previous models. The findings support a simplified model that accurately describes the relationship between shock wave evolution and wire expansion.
Researchers used a high-resolution 3D calculation program to study the interaction between a shock wave and molecular clouds in interstellar space. The results show that filament formation and density irregularities depend on cloud compression under the impact of the shock wave, with three phases of collision identified.
Researchers used numerical modeling to study the dynamics of supersonic flow, revealing two induced combustion modes and a local quasi detonation mode due to incident shock waves. The simulations provide valuable insights for scramjet engine design, enabling the optimization of mixing and combustion processes.
A new study proposes a way to directly observe predicted ion-induced shock waves, which can help optimize ion-beam cancer therapy. Shock waves contribute to thermomechanical damage in tumour tissue, increasing the volume of cells exposed to reactive species.
UNC researchers discovered that high-intensity shear shock waves amplify deep inside the brain, delivering a tenfold increase in tissue-ripping acceleration. This phenomenon may explain why some head knocks cause more harm than others.
Researchers generate high-energy shock waves in a laboratory setting, simulating the formation of supersonic shock waves that propel cosmic rays and particles. This breakthrough enables new studies on the acceleration of astrophysical particles and complements present remote sensing observations.
Researchers have observed and interpreted a cosmic phenomenon resulting from the acceleration of gas clouds by black holes and reacceleration by shock waves. The study reveals the connection between double acceleration and radio emission in galaxy clusters.
Scientists studying lunar sonic booms hope to answer whether mini shock waves on the moon are being generated by protons in the solar wind colliding with pockets of magnetic fields. The findings come from NASA's ARTEMIS mission, which has gathered high-fidelity measurements of the shock waves.
A recent study in rats suggests that acoustic shock waves can accelerate muscle healing by increasing chemical signaling factors and waking up satellite progenitor cells. This technique, called Extracorporeal Shock Wave Therapy (ESWT), has promising potential as a non-invasive therapy complementing existing recovery regimes.
Researchers found a sustained high prevalence of urinary tract stones, with an increased trend to treat patients with surgery. Surgical intervention for ureter or kidney stones rose from 12,062 to 18,055 cases over the study period.
Astronomers capture shock breakout of a supernova for the first time in visible light, revealing unexpected diversity in cataclysmic stellar events. The observations, made using NASA's Kepler space telescope, matched up well with mathematical models of Type II explosions.
Researchers used X-ray phase contrast imaging to study the formation and evolution of jets in cerium metal after shock waves were generated by impact systems. The study found that the yield stress of cerium could be estimated using jet heights and velocity histories, providing insight into material strength.
The Hubble Space Telescope has unveiled a small section of the expanding remains of a massive star that exploded about 8,000 years ago. The Veil Nebula, covering six full moons on the sky, is composed of wisps of gas that were once a star 20 times more massive than our sun.
Researchers propose a new technique to detect stars at galactic center by looking for radio waves from supersonic stars. Stars with high speeds can create shock waves, producing radio emission that can be detected.
Researchers have used ultra-short pulses of X-rays to create a film of shock waves in diamonds, providing new insights into the structure of these hard materials. The study reveals that intense shock waves can compress diamond by almost ten percent, opening up new perspectives on its dynamic behavior under high pressure.