Showing 20 articles starting at article 241

< Previous 20 articles        Next 20 articles >

Categories: Paleontology: Early Mammals and Birds, Physics: Acoustics and Ultrasound

Return to the site home page

     (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.

     (via sciencedaily.com) 

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

     (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.

     (via sciencedaily.com) 

Using radio transmitters, scientists have gained new insights into the behavior of medium ground finches in the Galapagos Islands. A study reveals daily movement patterns covering an area equivalent to the size of 30 soccer fields.

     (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.

     (via sciencedaily.com) 

New research suggests that determining evolutionary trees of organisms by comparing anatomy rather than gene sequences is misleading. The study shows that we often need to overturn centuries of scholarly work that classified living things according to how they look.

     (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.

     (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.

     (via sciencedaily.com) 

Paleontologists have debated whether dinosaurs were warm-blooded, like modern mammals and birds, or cold-blooded, like modern reptiles. In a new paper, scientists are unveiling a new method for studying dinosaurs' metabolic rates, using clues in their bones.

     (via sciencedaily.com) 

Scientists settle debate surrounding species that laid eggs exploited by early Australian people around 50,000 years ago. Shell proteins point to Genyornis, which was among the 'mega-fauna' to go extinct a few thousand years after humans arrived on the continent.

     (via sciencedaily.com) 

Researchers shed light on the way Quetzalcoatlus would have flown, finding that the dinosaur's flying dynamics were actually very different to how it has been depicted in popular culture.

     (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.

     (via sciencedaily.com) 

Jars of tiny platypus and echidna specimens, collected in the late 1800s by the scientist William Caldwell, have been discovered in the stores of Cambridge's University Museum of Zoology.

     (via sciencedaily.com) 

Researchers have examined the mass extinction of large animals over the past tens of thousands of years and found that extinct species had, on average, much smaller brains than species that survived.

     (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.

     (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.

     (via sciencedaily.com) 

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

     (via sciencedaily.com) 

Researchers created an ultrathin loudspeaker that can turn any rigid surface into a high-quality, active audio source. The fabrication process can enable the thin-film devices to be produced at scale.

     (via sciencedaily.com) 

Researchers have used the singing saw to demonstrate how the geometry of a curved sheet, like curved metal, could be tuned to create high-quality, long-lasting oscillations for applications in sensing, nanoelectronics, photonics and more.

     (via sciencedaily.com) 

Human-related extinctions of the largest herbivores and carnivores are disrupting what appears to be a fundamental feature of past and present ecosystems, says a new study.