Articles tagged with Vibration
Researchers from CNRS and INSA Strasbourg propose a new mechanism to explain lower-than-predicted vibrations near tracks as train speed increases. They show that a large part of energy is trapped in the heterogeneous ballast layer, leading to accelerated degradation.
Researchers developed a biomechanical model to estimate the critical crowd size at which pedestrian bridge wobbling begins, allowing for the design of safer bridges. The model takes into account nonlinear effects associated with pedestrian behavior and bridge interaction.
VibWrite integrates passcode, behavioral, and physiological characteristics to verify users, offering a low-cost security solution that resists attacks and can be deployed on any solid surface. The system has verified legitimate users with over 95% accuracy in trials and shows promise for commercialization in the near future.
Researchers have discovered a way to visualize tiny vibrational resonances using quantum dots, which could lead to the development of new sensing technologies. The technique uses light waves to drive the motion of a thin membrane, creating patterns that can be visualized through an array of quantum dots.
Researchers at MIT developed a smartphone app that can analyze a car's sounds and vibrations to detect issues such as clogged air filters and worn-out spark plugs. The system uses machine-learning processes to extract subtle differences, achieving accuracy above 90% in tests.
Researchers developed a wearable device called VAuth that creates a unique and secure signature using speech-induced vibrations on the user's body. The technology has achieved a 97-percent detection accuracy and successfully thwarts various practical attacks, making it a promising solution to enhance voice authentication security.
Researchers from Shahid Charmran University of Ahvaz in Iran have modeled new piezoelectric energy harvester (PEH) technology at the nano-scale level. Their study demonstrates how small-scale dimensions impact nonlinear vibrations and PEH voltage harvesting, revealing significant size effects on output.
Scientists at King Abdullah University of Science & Technology (KAUST) have discovered a crystalline material that changes shape in response to light, showcasing its potential applications in novel optoelectronic devices
Researchers develop precise new way to study materials, revealing strong electron-phonon coupling that could lead to unprecedented superconductivity. The approach allows scientists to validate theories and computations describing complex materials' behavior, providing deep insights into their behavior.
Researchers investigated how runners adapt their running patterns to cope with shock-induced vibrations. Preliminary results suggest that the human body adjusts to stabilize energetics and protect the upper body, regardless of speed. Further research is needed to confirm these findings and develop strategies to prevent running injuries.
Researchers created a nanomechanical resonator that confines vibrations to a small region, boosting coherence and achieving unprecedented Q-factors. This enables new generations of quantum sensors and force microscopy, with potential applications in probing quantum limits and molecular resolution imaging.
Physicists have developed optomechanical beams that can act as inherently accurate thermometers or optical shields, exploiting the principles of quantum physics. These microscopic beams have potential applications in biology, chemistry, electronics, and chip-based temperature sensors that never need calibration.
Researchers at Brookhaven Lab create method to track dynamic molecular features in soft materials, enabling control of vibrational waves and flow of energy. The technique has potential applications in thermal and acoustic insulators, waste heat conversion, and light-mechanical motion.
Despite popular belief, a new study from The Ohio State University Wexner Medical Center found that compression tights do not reduce muscle fatigue in runners. However, the tights did significantly reduce muscle vibration, which may still have some benefits for runners.
A recent study by ICFO researchers found a hybridization effect at high energies that could manipulate vibrational states and engineer hybrid states with mechanical modes. This discovery has the potential to open up new possibilities for manipulating vibrational states, studying collective motion of highly tunable systems.
Researchers at Carnegie Mellon University have created a plug-in sensor package that can transform any room into a smart environment, detecting various phenomena such as sounds, vibration, and temperature. The 'Synthetic Sensors' approach uses machine learning techniques to combine raw sensor feeds and identify dozens of events and obj...
A study by Florida Museum of Natural History found that noise pollution from gas compressors significantly decreases the populations of certain insects and spiders, while increasing others. This shift in arthropod communities could have larger-scale ecological consequences.
The Hong Kong Polytechnic University has developed a novel bio-inspired nonlinear anti-vibration system that significantly reduces vibration in various mechanical systems. The innovation boasts superior performance and cost-efficiency compared to existing devices.
Researchers analyzed high-speed endoscopic videos of vibrating vocal folds and audio recordings to study register changes in professional sopranos. They found distinct vocal fold vibratory patterns, including abrupt transitions and temporary loss of contact, which correlate with audible register breaks.
Researchers at Zhejiang University discovered a new type of bubbling mechanism that generates periodic and aperiodic bubbles with unique properties. This phenomenon has significant implications for industries such as heat transfer enhancement, mass transfer, and bubble motion control.
A Brazilian research team developed an optomechanical device that boosts the coupling between light waves and mechanical waves to higher levels than similar devices. This enables the creation of highly customizable sensors for detecting force and motion, as well as potential applications in telecommunications as optical modulators.
Physicists at Brigham Young University have developed an acoustic technique called time reversal that uses targeted sound vibrations to knock over Lego figures. This technology has far-reaching implications for fields like private communication, targeted noise cancelation, and even medical treatments such as destroying kidney stones.
The James Webb Space Telescope has completed its acoustic and vibration tests, ensuring it can withstand launch vibrations and maintain functionality in space. The telescope was subjected to simulated forces of up to 100 times per second using a new vibration test system.
Researchers at UC have found unique courtship behaviors in wolf spiders that contribute to their genetic isolation. The studies, conducted by graduate students Emily Pickett and Madeline Lallo, reveal varying strategies among species to woo females, including vibrations and visual signals.
Researchers will use simulators to recreate the experience of working in a high-rise office block, walking across a wobbly bridge, or dancing in a crowded stadium. The study aims to better understand how vibrations from tall buildings can affect people's health and wellbeing.
Researchers found that whole body vibration reduced body fat, improved insulin resistance, and increased muscle and bone strength in a mouse model of morbid obesity and diabetes. Circulating osteocalcin levels also rose, indicating potential benefits for glucose regulation.
Proteins' tiny motions, called vibrations, enable interactions with other molecules. A new study shows that the direction of these vibrations matters more than previously thought, shedding light on how proteins interact and facilitating tasks like absorbing oxygen and repairing cells.
Scientists discovered a new type of vibration in europium silicide nanoislands that dissipates heat more effectively. The study used nuclear inelastic scattering to measure the energy spectrum of atomic vibrations and found that the vibrations of atoms in the crystal lattice can be tailored for specific thermal properties.
The researchers created a synthetic version of tooth enamel to improve resilience in rigid structures. They successfully mimicked its properties through layering and polymerization, demonstrating that this material can absorb vibrations effectively.
The James Webb Space Telescope is set to undergo an earsplitting acoustic test, simulating the intense vibrations of launch. The team at NASA's Goddard Space Flight Center has completed vibration testing and prepared the telescope for the test, which will push its limits.
Researchers discovered termites can detect predatory ants through subtle substrate vibrations, allowing them to evade danger. This unique ability could lead to advances in technologies based on acoustic signatures and potentially revolutionize pest control methods.
A Pittsburgh engineer has received a $549,139 NSF CAREER Award to create a new screening method for swallowing disorders. The technology uses high-resolution vibration and sound recordings to diagnose dysphagia, allowing doctors to identify silent aspirators more accurately.
Scientists and engineers at NASA created a new, large-scale shaker table system to test the James Webb Space Telescope's vibrations during launch. The 'Vibration Test Systems' simulates forces from 5-100 Hz, enabling precise control over shaking levels.
A new smartphone app has been developed to measure ride comfort for railway companies, providing instant feedback from passengers about bumps, bangs and vibration on trains. The app uses artificial neural networks to evaluate ride quality, revealing that modern smartphones' accelerometers are suitable for measuring comfort.
Researchers at Virginia Tech have developed a groundbreaking, portable tuned mass damper that reduces structural vibrations by up to 75% in tests. The device is compact, affordable, and easy to integrate into building designs, making it an accessible solution for reducing unwanted movements.
NASA has resumed rigorous vibration testing on the James Webb Space Telescope after an early shutdown in 2016 due to sensor readings exceeding predicted levels. The team implemented changes to the test profile to prevent similar issues, adding diagnostic tests to ensure confidence in the launch environment.
Researchers have discovered that localized vibrations in amorphous silicon dioxide contribute substantially to the material's thermal conductivity, contradicting previous assumptions. This breakthrough could lead to more efficient forms of everyday materials and even superconducting materials.
The study reveals strong correlations between laser-induced light fluctuations and mechanical motion, showcasing the strange laws of quantum mechanics. By using a phononic crystal to confine vibrations, the researchers achieved ultra-precision measurements, overcoming fundamental quantum limits.
A University of Washington study has captured the eruption of an underwater volcano in unprecedented detail, providing new clues about the behavior of volcanoes where two ocean plates are moving apart. The research used data from the Cabled Array seafloor observatory to analyze seismic vibrations and movement before and during the event.
Researchers simulate 2D glass using supercomputers, revealing it can exhibit enhanced thermal vibration motion leading to infinite softening. This finding has potential applications in energy-saving societies.
Researchers developed a tiny, soft, and wearable acoustic sensor that measures vibrations in the human body, allowing for monitoring of human heart health and recognition of spoken words. The device can gather continuous physiological data and has implications for remote healthcare and communication for people with speech impairments.
Researchers from Woods Hole Oceanographic Institution discovered a previously unknown element of whale songs, particle motion, which could travel further than expected. This finding raises concerns about potential interference with whale communication due to human-made noise in the ocean.
Researchers discovered that jumping spiders can detect sounds in the 80-380 Hertz range at distances up to 10 feet, even without ears or ear drums. This ability helps them respond to predators like the Mud Dauber wasp.
Researchers at Georgia Institute of Technology developed a system that teaches people Morse code in four hours using vibrations felt near the ear. Participants were 94% accurate keying a sentence and 98% accurate writing codes for every letter, even while playing games and feeling the taps without paying attention.
Researchers at MIT have developed a computational model that analyzes ambient vibrations to detect signs of building stability. The model may help monitor buildings over time for potential damage or stress, providing a database like a health book for the structure.
Researchers at Oak Ridge National Laboratory have discovered the key to piezoelectric excellence in relaxor-based ferroelectrics, enabling more detailed electrical signals and better images in medical ultrasound. The findings may provide knowledge needed to accelerate the design of functional materials for diverse applications.
Research confirms spider webs are superbly tuned instruments for vibration transmission, with web tension and stiffness controlling information sent. Spiders use web vibrations to detect prey and predators, with their 'view' relying almost exclusively on this sensory input.
Researchers from MIT's CSAIL have developed an imaging technique called Interactive Dynamic Video (IDV) that lets users reach in and interact with objects in videos. By analyzing video clips for 'vibration modes,' the team can predict how objects will move in new situations, enabling realistic simulations.
Researchers from Hiroshima University have developed a small vibrating device that attaches to surgical tools, enhancing surgeons' sensitivity to different shapes and textures. The PZT Actuator boosts the sensation to a noticeable level, allowing doctors to detect tissue texture and identify solid tumors with greater accuracy.
Haptics researchers at Northwestern University have discovered that ultrasonic vibrations cause fingers to bounce on touchscreens, reducing friction. This phenomenon is caused by the air trapped between the finger and screen compressing and acting like a spring, allowing the finger to fall onto a cushion of air instead of the screen.
A new three-dimensional lattice structure developed by ETH scientists can absorb a wide range of vibrations, including those in the audible range. This design allows for improved noise reduction and energy efficiency in machines, vehicles, and aircraft.
Researchers at MIT have developed a new space boot with built-in sensors and haptic motors that can guide the wearer around or over obstacles. The boot uses vibrations to provide navigation cues, which could be beneficial for both astronauts in space and visually impaired individuals on Earth.
Researchers at Yale University have created a Moebius strip-like structure by manipulating the shape of connected vibrating springs, demonstrating a new way to control waves. The experiment showcases an extension to the adiabatic theorem, which predicts a robust method for wave manipulation.
Researchers found that sub-sensory vibratory noise delivered to the foot sole of older adults significantly augmented postural control complexity, leading to improved mobility and reduced TUG times. This study highlights the potential benefits of vibratory stimulation for enhancing physical function in older adults.
Researchers created a nanoscale drum using graphene to manipulate vibrations with high tunability and controllable coupling between modes. This enabled the creation of new notes and amplification of vibrations, opening doors to probing fundamental physics and improving sensor sensitivity.
Researchers developed a new method to calculate elasticity of minerals at high pressure and temperature, reducing computational loads by up to tenfold. This allows for the constraining of Earth's interior composition and temperature with increased precision.
A new device detects ultra-low concentrations of gases accurately and nearly instantly, even with small vibrations. The sensor uses cavity ring-down spectroscopy and a high-power broadband laser, making it more practical for field applications.
Male fiddler crabs produce female-luring vibrations in their burrows, serving as a type of 'Morse code' that females decipher to learn about suitors. The length and interval of pulses convey information on male characteristics, influencing female decision-making during mating.
A joint university team is using field and laboratory tests, computer modeling, to evaluate the level of vibration six rock-based lighthouses endure from constant sea battering. The study aims to understand how climate change affects lighthouse longevity.
Physicists observe nanoscale light-matter phenomenon lasting only attoseconds, studying collective electron motions and near fields in gold nanoneedles. The development enables precise characterization of near-field vibrations, paving the way for complex studies of light-matter interactions in metals.