A Korean research team created an underwater acoustic lens capable of focusing sound precisely at a desired point while reducing weight by about 40% compared to conventional designs. The findings have significant implications for underwater communication, marine environmental monitoring, and acoustic energy transfer.
Researchers introduce a set of universal relations that connect spectrum shapes to wave behavior in one-dimensional disordered systems. The framework reveals a never-before-seen critical state where waves localize differently depending on direction, and shows how it can be tracked using a topological winding number.
Researchers discovered that ultrasoft elastic materials generate a V-shaped wake similar to boat wakes, blurring the distinction between wave behavior on solids and fluids. This finding could lead to new approaches for soft-tissue diagnostics and understanding the properties of natural and engineered soft materials.
Researchers develop a nanocomposite thermistor that combines VO2(B) and V2O5 phases to overcome thermal imaging limitations. The composite achieves high temperature sensitivity, strong infrared responsivity, and fast response times at elevated temperatures.
Researchers at Pohang University of Science & Technology developed a secure hologram platform that stores information using the wavelength of light and spacing between metasurface layers. The technology enables information processing using light alone, without electrical power or electronic chips.
Researchers have developed a numerical model to optimize avalanche photodiodes for detecting photons in ultraviolet wavelengths. The study improved the design of Geiger-mode avalanche photodiodes, resulting in high single-photon detection efficiencies up to 71% for photons with a wavelength of 340 nm.
Researchers at CUNY ASRC introduce twistelastics, a technique using tiny rotations to manipulate mechanical waves, allowing unprecedented adaptability in sound and vibration control. The breakthrough enables flexible wave behavior for applications in medical imaging, consumer electronics, and microfluidics.
A research team has experimentally demonstrated a nonlinear wave phenomenon that changes its frequency depending on the direction of incoming waves. The system exhibits different responses to waves entering from one side versus the other, with potential applications in medical ultrasound imaging and noise control.
Researchers at Pohang University of Science & Technology and Jeonbuk National University successfully trapped mechanical waves within a single resonator, overcoming a century-old physics barrier. The discovery opens new possibilities for energy harvesting, ultra-sensitive sensors, and advanced communications.
Researchers from TU Delft studied FePS₃ nanomaterial, discovering how vibrations change near its phase transition temperature and affecting magnetic properties. The findings pave the way for ultra-sensitive sensors with exceptional sensitivity to internal and external forces.
The researchers created a 'metasheet' with an elastic polymer and embedded magnetic microparticles that can move like a wave when controlled by a magnetic field. This technology has potential for use in confined spaces, allowing objects to be lifted and moved without physical contact.
Researchers at Macquarie University developed a new software package, TMATSOLVER, that accurately models complex wave scattering for metamaterial design. The tool enables rapid prototyping and validation of new metamaterial designs, accelerating research and development in this growing global market.
A new deep learning-based inverse design method allows for the optimization of complex acoustic metamaterials, reducing noise pollution while maintaining ventilation. The approach enables ultra-broadband sound attenuation across various peak frequencies.
A new type of mechanical sensor, powered by sound waves, could monitor infrastructure and medical devices without battery replacement, reducing waste. The sensor can distinguish between different words and sounds, triggering processes or alarms.
Multistable mechanical metamaterials can switch between multiple stable configurations under external loading, making them reusable and efficient for quick action. Their unique properties make them promising for various engineering applications, including energy absorption, soft actuators/robots, and wave control.
A University of Central Florida engineer is leading a $3.3 million ARPA-E funded project to develop simulation software for floating offshore wind turbines. The goal is to improve turbine design and increase their use as a renewable energy source. The software will be licensed or commercialized and can be hosted on a university web page.
An investigation by The BMJ found that only 30 of 200 private hospitals treated COVID-19 patients in April 2020. Meanwhile, some private hospitals devoted 60% or more of their capacity to treating private patients during the pandemic.
Researchers have developed a novel portable and low-cost macroscopic mapping system for all-optical cardiac electrophysiology using optogenetics and machine vision cameras. The system can stimulate and image engineered networks of human heart cells, providing insights into cardiac wave function and stability.
Researchers developed a hybrid system combining optomechanical and magnomechanical cavities, enabling ultrawide microwave-to-optical conversion. The system exhibits high-quality optical measurement of mechanical state, with applications in signal transduction and sensing.
The researchers designed and fabricated three different paper-based metamaterials using their new technique, including a polarization converter, an absorber, and a conformal coding metasurface. These materials demonstrated unique properties such as high conductivity and radar cross-section reduction.
Researchers developed a mathematical model of cilia beating due to mechanical instability caused by the cilium motor protein dynein. This knowledge will aid in understanding and treating cilia-related diseases.
A team led by Professor Song Min Kim developed a system that can support concurrent communications for tens of millions of IoT devices using backscattering millimeter-level waves. The system offers internet connectivity on a mass scale to IoT devices at a low installation cost.
Researchers at TU Wien and the University of Rennes have created a method to calculate tailor-made anti-reflective structures that can be used to reduce wave reflections in various mediums. This technology has potential applications in improving wireless reception, imaging techniques, and even future mobile communications.
Scientists have found that axisymmetric 'spike waves' can exceed previously thought limits on ocean wave height, leading to significant implications for maritime safety. The new research revealed the fundamental mechanisms behind highly directional and crossing waves becoming much larger than others.
Researchers at Princeton University have discovered that electrons in a crystal exhibit linked and knotted quantum twists, raising questions about the quantum properties of electronic systems. The study brings together ideas in condensed matter physics, topology, and knot theory to create a new understanding of quantum mechanics.
Researchers developed a highly efficient wave-based acoustics simulation that can accurately estimate the acoustics of large-scale interior spaces. The method uses a time-domain Finite Element Method to consider frequency-dependent characteristics of sound absorption materials, enabling precise modeling and high-speed estimations.
The study reveals that a single folding mechanism can generate an infinite family of shapes in flexible structures. Researchers have developed a novel approach to predict and control tough, flexible structures from skyscrapers to microscale using conformal deformations.
A mechanical RIS has been developed with high reconfiguration degree of freedom, low power consumption, and real-time dynamic control capabilities. It uses a robust control method to determine the rotation angle of each meta-atom and offers a new energy-saving and environmentally friendly alternative for wireless communications systems.
Cells utilize long-distance traveling waves in a self-organized manner to close wounds, guided by intricate interplay of cell movement, sensing, and protein activation. This coupled system enables robust communication of direction over large distances, promoting coordinated behavior for healing and growth.
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.
A new optomechanical device uses a microscopic silicon disk to confine optical and mechanical waves, achieving high coupling rates and making it highly customizable. The device's design allows for independent tailoring of its performance with different light frequencies or mechanical wave frequencies.
Researchers at Oregon Stroke Center have successfully treated five stroke patients with laser clot-busting, achieving complete vessel re-opening in some cases. The study aims to examine the safety of the technique and explore its potential as a next wave of acute stroke treatment.