Articles tagged with Vibration
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Researchers found that new vibration absorbers can reduce wheel squeal in public rail systems, but had a modest impact on rolling noise. The devices attach to the wheels or tracks of rail transit systems and may be effective in reducing wheel squeal, but more testing is needed to fully understand their effectiveness.
Researchers used X-rays to study atomic vibrations in high-temperature superconductors, finding a giant resonance that contradicts the electron-phonon coupling mechanism. This discovery highlights the need for new scenarios to explain high-temperature superconductivity.
Researchers have developed a novel device called the Shoelace Antenna to regulate heat and particle flow through the plasma boundary in a tokamak fusion reactor. The antenna exploits naturally occurring resonant vibrations to achieve this goal.
Researchers at Queen Mary University of London discovered that high-frequency vibrations in pop and rock music enhance energy generation in solar cells, increasing efficiency. The study, published in Advanced Materials, suggests a new potential for printed solar cells to generate electricity from sunlight.
A new system uses phased acoustic arrays and laser vibrometry to detect vibrations inside a container, revealing the presence of explosives. The technology can identify differences between low-yield and high-yield explosives from a distance, providing an additional layer of safety.
Researchers studied elephant vocal folds to understand how they produce infrasonic calls. They found that elephant vocal folds are orientated at a very acute angle in relation to the air stream, whereas in humans they are almost perpendicular.
A team of researchers has made the first detailed observation of how energy travels through diamonds containing nitrogen-vacancy centers, defects that can be manipulated with optical methods. The findings could help scientists understand the properties of these diamonds, which have potential applications in quantum computing and imagin...
Physicists at NIST have successfully entangled a microscopic mechanical drum with electrical signals, confirming its potential as a quantum memory in future quantum computers. The experiment also marks the first-ever entanglement of a macroscopic oscillator, opening up new practical uses for the drum.
A recent study published in the Proceedings of the National Academy of Sciences has discovered that two sets of nerve receptors in the skin convey information about fine textures through vibrations. This finding suggests that humans can discriminate between different fine textures, such as silk and satin, through these subtle vibrations.
A recent study tested fiber-optic sensors on a 36-km stretch of high-speed commuter railroad lines in Hong Kong, detecting over 10 million measurements and identifying anomalies such as excessive vibrations and mechanical defects. The system saves the rail company around $250,000 annually in maintenance costs.
The technique, dubbed 'multiple-dimensional vibrational spectroscopy,' captures the conformation of small molecules with great accuracy, measuring vibrations and determining angles between bonds. This method could revolutionize the study of catalysis, energy storage, and biomembranes.
The GPM Core satellite completed two pre-vibration solar array deployment tests, simulating the satellite's deployment in space. The successful tests showcased the satellite's support system and air cushion design, which reduce friction and mimic how the solar array would float in space.
A new clinical trial shows that whole body vibration therapy increases bone-mineral density and muscle mass in adolescents with cerebral palsy, allowing for improved walking ability and overall health. The therapy significantly enhances leg and spine bone-mineral density, while also increasing muscle mass in the legs.
Researchers at MIT have developed an array that precisely tracks motor vibrations through the skin, enabling better localization and perception of tactile stimuli. This innovation could lead to wearable GPS-linked devices providing tactile guidance for navigation and direction.
University of Illinois researchers create the first bridge between optomechanics and microfluidics, enabling the study of mechanical vibrations in liquids. The technology has potential applications in biosensors, fluid analysis, and optical control of fluid flow.
Researchers used a revolutionary X-ray laser to freeze the motion of atoms in gold nanocrystals, revealing unusual supersonic vibrations. The new images support theoretical models for light interaction with metals and have potential applications in understanding material response after perturbation.
Biophysicist Christian Herbst develops a new method to visualize chaotic phenomena, creating a single graph that can intuitively interpret symptoms of systems 'on the way to chaos'. The phasegram technique reveals complex behavior in simple systems, such as weather and cardiac rhythm.
A new wave bypass technique could divert vibrations away from load-bearing elements of bridges, reducing the risk of catastrophic collapses. Inspired by nature's structured mirrors and metamaterials, the method involves adding lightweight resonators to existing bridges to absorb specific vibrations.
Physicists at Technical University of Munich develop a method to store information in mechanical vibrations, reducing sensitivity to electrical interference. This innovation could lead to more powerful quantum computers by utilizing carbon nanotubes as quantum bits.
Researchers created a quantum sensor that detects the smallest vibrations in a carbon nanotube by measuring the effects of a magnetic spin on its mechanical motion. The device has potential applications in determining individual molecule masses and measuring magnetic forces.
Researchers developed a new analytical method to detect fatigue in wind turbines' parts while the turbine is in operation. This method distinguishes between mechanical properties and interfering noise, enabling precise detection of material fatigue or untightened screws.
A UI researcher has developed a computer program that can accurately predict the effect of role posture on bone and muscle stress in the head and neck during whole-body vibration. The model may reduce the need for human subjects in design and testing, benefiting industries such as automotive and heavy machinery manufacturing.
A new map created by Japanese researchers helps identify high-rise buildings in the Osaka Basin vulnerable to long-period strong ground motions that last minutes. The map provides useful information for engineers to design earthquake-resistant buildings.
The aft-optics subsystem of NASA's James Webb Space Telescope has completed performance testing, marking a significant milestone in the telescope's integration and test activities. The successful completion of this testing demonstrates that the AOS can withstand the extreme temperatures and vibration environment of space.
Researchers at MIT have developed a novel method to manipulate heat by employing engineered materials with nanostructured semiconductor alloy crystals. This approach enables the concentration of heat phonons within a specific frequency range, allowing for control over heat flow similar to light waves.
Researchers found that adding noise to a micro-textured surface can lower the energy barrier for an object to roll, mimicking gecko feet's adhesive properties. This study could lead to applications in gecko-inspired adhesives, tire adhesion, and digital operations.
A study by Sliman Bensmaia and colleagues found that the timing and frequency of vibrations in the skin transmit specific messages about texture to the brain, similar to how sound is perceived. This new understanding has implications for simulating tactile sensations, such as haptic rendering and prosthetic technology.
A new study suggests that daily exposure to low-magnitude mechanical signals partially rescues B- and T-cell populations damaged by obesity, improving immune function. Brief daily vibration interventions showed promise in obese mice, potentially leading to a cheap and drug-free way for people to regain health.
Researchers developed an energy-harvesting device that uses piezoelectricity to convert heartbeat-induced vibrations into electricity. The device can generate enough power to continuously operate a pacemaker without the need for battery replacements.
A new damping technique has been developed to combat painful vibrations in baseball bats, targeting the sweet spot where vibrations between 600-700 Hz cause pain. The technique involves a mass-spring device that quickly eliminates these painful oscillations, reducing shock and discomfort for players.
Researchers created a simplified model of the brain and skull inside a helmet during a collision, illustrating how fast vibrational motion translates to sloshing brain motion. The study aims to improve helmet design for better brain protection, with potential futuristic helmets that crumple on impact like plastic car bumpers.
Researchers found that usually only three members of the group participate in the 'conversations', which help explain the group's ability to work together. The study also indicates how this behavior uses rumbles in a structured way to transmit signals, avoiding mass chaos at watering holes.
A new study suggests that the shape and vibrational characteristics of odorant molecules play a crucial role in our ability to detect different smells. Researchers found that the vibrations of an odorant molecule's chemical bonds contribute to electron transfer, which sends signals to the receptor, enhancing detection.
Physicists at Max Planck Institute find competition between superconductivity and charge density waves in copper oxide ceramics, improving understanding of zero-resistance transport. The discovery could explain unusual interactions between superconducting and magnetic materials.
Researchers discovered that elephants produce infrasounds by vibrating their large larynxes, similar to the human voice. This finding reveals the physical production mechanism behind these subaudible sounds, which play a crucial role in elephant communication and social life.
Researchers found that severe influenza infection doubles the odds of developing Parkinson's disease later in life, whereas a typical case of red measles as a child reduces the risk by 35%. The study also suggests an association between high-intensity vibrations and increased Parkinson's risk.
Researchers at the University of Washington have developed a low-cost portable diagnostic system that uses a textured surface to move small drops of liquid along predetermined paths. The system, inspired by the lotus effect, requires little energy and avoids contamination.
Researchers develop data logger to analyze and harness energy from vibrations, enabling wearable devices, IoT systems, and industrial applications. The technology replaces traditional battery-powered devices with sustainable energy harvesting.
A new study by the University of Bristol reveals that male tree crickets can change the frequency of their songs with temperature, allowing them to adjust their size. This allows males to increase sound power, which may be linked to attracting mates and disguising their true size.
Researchers have created a tiny, prototype middle-ear microphone that can be implanted in the ear to avoid problems with current cochlear implants. The device has been successfully tested in cadavers and aims to reduce size and improve sound detection abilities for future human testing.
A study reveals that urban rail traffic induces significant environmental vibrations in the short wavelength range, caused by uneven wheel-rail contact. The researchers found that the source function for these vibrations is better described by a power spectral density function of wheel-rail contact rather than track contact.
Researchers at the University of Michigan have designed a device that converts heartbeat vibrations into electricity to power pacemakers and defibrillators. The new energy harvester could save patients from repeated surgeries by reducing or eliminating the need for battery replacements.
The Duke team has created a nonlinear approach to energy harvesting that can capture more frequencies from ambient vibrations, making it ideal for practical uses in the real world. This could lead to the development of devices that power implants, sensors, and even larger electrical systems.
A team of aerospace engineers developed a prototype device that harnesses chest cavity vibrations to generate electricity for pacemakers, delivering eight times the required energy. The technology has potential as a biocompatible alternative to competing methods.
Researchers found that people with DFNA2 hearing loss are more sensitive to low-frequency vibrations, suggesting a link between the potassium channel and touch sensation. This discovery reveals new insights into the relationships between hearing loss and touch sensitivity.
Scientists have developed a microscope that utilizes compression sensing to gather molecular vibration information with increased resolution and reduced time. The new method has been applied to sum frequency generation microscopes, resulting in images with 16 times more pixel density than traditional scanning techniques.
Researchers discovered negative thermal expansion in ScF3 through computer simulations and neutron scattering experiments. The material shrinks as it heats up due to unique atomic vibrations.
A research team at Georgia Tech has developed a technique to decode keyboard vibrations and decipher complete sentences with up to 80 percent accuracy. By analyzing the accelerometer's data, the system can identify pairs of keystrokes and compare them to a preloaded dictionary to determine the typed word.
Researchers at MIT have designed a tiny energy harvester that can generate 100 times the power of similar devices, making it a potential solution to the power constraint in wireless sensors. The device uses a single layer of PZT and responds to a wide range of low-frequency vibrations.
Researchers have identified a novel method for detecting weak points in disordered materials like glass, which may lead to better understanding of material failure and potential applications. The study combines theoretical modeling with experimental results, shedding light on the principles governing material responses.
Researchers developed a glove with vibrating fingertip that enhances tactile sensitivity and motor performance. The device showed statistically significant improvements in various sensory and motor skill tasks, including texture discrimination, two-point discrimination, and grasp tests.
Dr. Prasad received the ASME Student Section Advisor Award for District A for his dedication to student achievement and education. His contributions have inspired students to become leaders in mechanical engineering, leading to numerous ASME award wins.
Researchers at the Weizmann Institute developed a quantum version of a locked-in amplifier using a single atomic-ion detector, achieving spatial resolution of just a few nanometers. This technique improves the sensitivity of quantum sensors by around 100 times.
Vibrations in the inner ear persist even after a sound has stopped, potentially serving as a short-term memory of past stimuli. This phenomenon may help explain why some gaps between sounds are too brief to be perceived by the human ear.
Researchers have found that exposure to vibrations from power tools can cause hand-arm vibration syndrome, a condition that leads to numbness, loss of dexterity, and discoloration in the extremities. A study by Concordia engineer Subhash Rakheja suggests that simple seat upgrades can reduce exposure by up to 60 percent.
A team from Vienna and Munich has developed a numerical solver to predict the design-limited damping of mechanical resonators, enabling the creation of more efficient devices. The solver uses quantum mechanics to calculate the radiation of phonons from the resonator, removing the need for trial and error prototype fabrication.
Researchers developed a virtual laboratory model to predict train vibrations, taking into account elasticity, density, and thickness of materials. The model was validated on the Madrid-Barcelona high speed line and will be applied to other rail facilities in future studies.
Antennal drumming behavior has been linked to development of social caste in a native paper wasp, Polistes fuscatus. The new work shows that exposure to simulated antennal drumming biases developing larvae toward the physiological characteristics of workers rather than gynes.
Male Schizococa ocreata wolf spiders adjust their signaling modes based on environment to increase mating chances. In natural habitats, vibrations on leaf litter were found to be significantly more effective than other substrates, leading to successful mating over 85% of the time.
Australian researchers found that as fatigue progresses, speech slows and variations in pitch increase, indicating a loss of control over the muscles producing speech. The study provides a novel method for analyzing the effects of fatigue on the central nervous system through acoustic analysis.