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Categories: Ecology: Trees, Physics: Acoustics and Ultrasound

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Physics: Acoustics and Ultrasound
Published

Using sound and bubbles to make bandages stickier and longer lasting      (via sciencedaily.com) 

Researchers have discovered that they can control the stickiness of adhesive bandages using ultrasound waves and bubbles. This breakthrough could lead to new advances in medical adhesives, especially in cases where adhesives are difficult to apply such as on wet skin.

Physics: Acoustics and Ultrasound
Published

Ultrasound could save racehorses from bucked shins      (via sciencedaily.com) 

When racehorses enter training at about 2 years old, they can develop tiny stress fractures and new bone formations in their legs. This condition, called bucked shin, occurs in about 70% of the animals. Researchers have now developed a method to screen for bucked shin using ultrasound. Axial transmission, in which an ultrasound emitter and receiver are placed on the skin to induce and measure wave velocities, is frequently used to study osteoporosis in humans. The method could detect bucked shin more easily and preserve the health and growth of young horses.

Physics: Acoustics and Ultrasound
Published

Leadership online: Charisma matters most in video communication      (via sciencedaily.com) 

Managers need to make a consistent impression in order to motivate and inspire people, and that applies even more to video communication than to other digital channels. Researchers investigated the influence that charismatic leadership tactics used in text, audio and video communication channels have on employee performance. They focused on mobile work and the gig economy, in which jobs are flexibly assigned to freelancers via online platforms.

Physics: Acoustics and Ultrasound
Published

Engineers develop stickers that can see inside the body      (via sciencedaily.com) 

Engineers designed an adhesive patch that produces ultrasound images of the body. The stamp-sized device sticks to skin and can provide continuous ultrasound imaging of internal organs for 48 hours.

Physics: Acoustics and Ultrasound
Published

Improving image sensors for machine vision      (via sciencedaily.com) 

Researchers highlight the latest nanostructured components integrated on image sensor chips that are most likely to make the biggest impact in multimodal imaging and detailed a promising approach to detect multiple-band spectra by fabricating an on-chip spectrometer. The developments could enable autonomous vehicles to see around corners instead of just a straight line, biomedical imaging to detect abnormalities at different tissue depths, and telescopes to see through interstellar dust.

Physics: Acoustics and Ultrasound
Published

Flexible method for shaping laser beams extends depth-of-focus for OCT imaging      (via sciencedaily.com) 

Researchers have developed a new method for flexibly creating various needle-shaped laser beams. These long, narrow beams can be used to improve optical coherence tomography (OCT), a noninvasive and versatile imaging tool that is used for scientific research and various types of clinical diagnoses.

Physics: Acoustics and Ultrasound
Published

Music-making and the flow of aerosols      (via sciencedaily.com) 

If simply breathing can spread the SARS-CoV-2 virus to others nearby, what about blowing into a tuba? Researchers used fluid mechanics to study the movement of aerosols generated by professional musicians.

Physics: Acoustics and Ultrasound
Published

Eco-friendly sound absorbers from seaweed      (via sciencedaily.com) 

From airplanes to apartments, most spaces are now designed with sound-absorbing materials that help dampen the droning, echoing and murmuring sounds of everyday life. But most of the acoustic materials that can cancel out human voices, traffic and music are made from plastic foams that aren't easily recycled or degraded. Now, researchers have created a biodegradable seaweed-derived film that effectively absorbs sounds in this range.

Physics: Acoustics and Ultrasound
Published

Scientists invent 'quantum flute' that can make particles of light move together      (via sciencedaily.com) 

Physicists have invented a 'quantum flute' that, like the Pied Piper, can coerce particles of light to move together in a way that's never been seen before.

Physics: Acoustics and Ultrasound
Published

Hearing better with skin than ears      (via sciencedaily.com) 

A research team develops a sound-sensing skin-attachable acoustic sensor. The new sensor decreased in size and increased in flexibility and is applicable as auditory electronic skin.

Physics: Acoustics and Ultrasound
Published

Optical microphone sees sound like never before      (via sciencedaily.com) 

A camera system can see sound vibrations with such precision and detail that it can reconstruct the music of a single instrument in a band or orchestra. Even the most high-powered and directed microphones can't eliminate nearby sounds, ambient noise and the effect of acoustics when they capture audio. The novel system uses two cameras and a laser to sense high-speed, low-amplitude surface vibrations. These vibrations can be used to reconstruct sound, capturing isolated audio without inference or a microphone.

Physics: Acoustics and Ultrasound
Published

High-intensity focused ultrasound (HIFU) can control prostate cancer with fewer side effects      (via sciencedaily.com) 

High-intensity focused ultrasound (HIFU) can help some men with prostate cancer avoid surgery or radiation.

Physics: Acoustics and Ultrasound
Published

Moth wing-inspired sound absorbing wallpaper in sight after breakthrough      (via sciencedaily.com) 

Experts at the University of Bristol have discovered that the scales on moth wings act as excellent sound absorbers even when placed on an artificial surface.

Physics: Acoustics and Ultrasound
Published

Sizzling sound of deep-frying reveals complex physics      (via sciencedaily.com) 

Researchers carefully studied bubbles that form when water droplets come into contact with heated cooking oil and found that the type and number of bubbles formed depends on the amount of water absorbed by the chopsticks as well as the chopstick material. The water droplet explodes when it hit the hot oil, in three types of bubble events: an explosion cavity, an elongated cavity, and an oscillating cavity.

Physics: Acoustics and Ultrasound
Published

Direct sound printing is a potential game-changer in 3D printing      (via sciencedaily.com) 

Researchers describe a new platform technology called direct sound printing (DSP), which uses soundwaves to produce new objects. The paper explains show how focused ultrasound waves can be used to create sonochemical reactions in minuscule cavitation regions. Extremes of temperature and pressure lasting trillionths of a second can generate pre-designed complex geometries that cannot be made with existing techniques.

Physics: Acoustics and Ultrasound
Published

Ultrasound-guided microbubbles boost immunotherapy efficacy      (via sciencedaily.com) 

Researchers have developed an ultrasound-guided cancer immunotherapy platform that generates systemic antitumor immunity and improves the therapeutic efficacy of immune checkpoint blockade.

Physics: Acoustics and Ultrasound
Published

Going gentle on mechanical quantum systems      (via sciencedaily.com) 

Systems in which mechanical motion is controlled at the level of individual quanta are emerging as a promising quantum-?technology platform. New experimental work now establishes how quantum properties of such systems can be measured without destroying the quantum state -- a key ingredient for tapping the full potential of mechanical quantum systems.

Physics: Acoustics and Ultrasound
Published

How MRI could revolutionize heart failure diagnosis      (via sciencedaily.com) 

Until now, the best way of diagnosing heart failure has been an invasive assessment, but it carries risks for patients. Non-invasive echocardiogram, which is based on ultrasound, are usually used instead, but they are wrong in up to 50 per cent of cases. The new study shows how magnetic resonance imaging (MRI) is superior to echocardiography for diagnosing heart failure, as well as being a powerful tool to predict patient outcomes, including death.

Physics: Acoustics and Ultrasound
Published

Better residents' health after switch to electric buses      (via sciencedaily.com) 

The health of residents living alongside a bus route in Gothenburg, Sweden, became considerably better when hybrid buses were replaced by buses fully powered by electricity. Along with the noise levels there was a reduction of fatigue, day time sleepiness and low mood, a new study shows.

Physics: Acoustics and Ultrasound
Published

3D bimodal photoacoustic ultrasound imaging to diagnose peripheral vascular diseases      (via sciencedaily.com) 

A research team has developed a bimodal photoacoustic/ ultrasound imaging technology for the human foot.