Showing 20 articles starting at article 841
< Previous 20 articles Next 20 articles >
Categories: Physics: Acoustics and Ultrasound, Space: Structures and Features
Published Gravitational wave mirror experiments can evolve into quantum entities
(via sciencedaily.com) Scientists review research on gravitational wave detectors as a historical example of quantum technologies and examine the fundamental research on the connection between quantum physics and gravity. The team examined recent gravitational wave experiments, showing it is possible to shield large objects from strong influences from the thermal and seismic environment to allow them to evolve as one quantum object. This decoupling from the environment enables measurement sensitivities that would otherwise be impossible.
Published Scientists announce discovery of supermassive binary black holes
(via sciencedaily.com) Researchers have discovered a supermassive black hole binary system, one of only two known such systems.
Published Acoustic propulsion of nanomachines depends on their orientation
(via sciencedaily.com) Scientists have now found answers to central questions which had previously stood in the way of acoustic propulsion of nanoparticles.
Published Physicists show how frequencies can easily be multiplied without special circuitry
(via sciencedaily.com) A new discovery by physicists could make certain components in computers and smartphones obsolete. The team has succeeded in directly converting frequencies to higher ranges in a common magnetic material without the need for additional components. Frequency multiplication is a fundamental process in modern electronics.
Published Black hole billiards in the centers of galaxies
(via sciencedaily.com) Researchers provide the first plausible explanation to why one of the most massive black hole pairs observed to date by gravitational waves also seemed to merge on a non-circular orbit. Their suggested solution involves a chaotic triple drama inside a giant disk of gas around a super massive black hole in a galaxy far, far away.
Published Mathematical discovery could shed light on secrets of the Universe
(via sciencedaily.com) How can Einstein's theory of gravity be unified with quantum mechanics? It is a challenge that could give us deep insights into phenomena such as black holes and the birth of the universe. Now, a new article presents results that cast new light on important challenges in understanding quantum gravity.
Published Event horizons are tunable factories of quantum entanglement
(via sciencedaily.com) Original source Physicists have leveraged quantum information theory techniques to reveal a mechanism for amplifying, or 'stimulating,' the production of entanglement in the Hawking effect in a controlled manner. Furthermore, these scientists propose a protocol for testing this idea in the laboratory using artificially produced event horizons.
Published Dark energy: Neutron stars will tell us if it's only an illusion
(via sciencedaily.com) Scientists provide the first simulation of neutron star collisions in extensions of general relativity relevant for cosmology, offering a new approach to test gravity.
Published 'Closest black hole' system found to contain no black hole
(via sciencedaily.com) Original source In 2020, astronomers reported the closest black hole to Earth, located just 1000 light-years away in the HR 6819 system. But the results of their study were contested by other researchers. In a new paper, these two teams have united to report that there is in fact no black hole in HR 6819, which is instead a 'vampire' two-star system in a rare and short-lived stage of its evolution.
Published Ultrasound scan can diagnose prostate cancer
(via sciencedaily.com) An ultrasound scan can be used to detect cases of prostate cancer, according to new research.
Published Ultrasounds for endangered abalone mollusks
(via sciencedaily.com) The world's abalone are threatened, endangered or otherwise vulnerable in nearly every corner of the planet. If only we could wave a magic wand to know when abalone are ready to reproduce, without even touching them. Scientists have now found that wand -- although it isn't magic, and it only looks like a wand. It's an ultrasound transducer, and it can be used to quickly and noninvasively detect when abalone are ready to spawn, they report in a study this week.
Published New simulations refine axion mass, refocusing dark matter search
(via sciencedaily.com) Axions are today's most popular candidate for dark matter, and numerous experiments are trying to detect them in microwave cavities where the axion should rarely convert into an electromagnetic wave. But a new simulation of the production of axions in the early universe provides a more refined mass estimate, and higher frequency for the EM wave, that is outside the range of these experiments. The new mass comes from adaptive mesh refinement in supercomputer simulations.
Published Transparent ultrasound chip improves cell stimulation and imaging
(via sciencedaily.com) Ultrasound scans -- best known for monitoring pregnancies or imaging organs -- can also be used to stimulate cells and direct cell function. A team of researchers has developed an easier, more effective way to harness the technology for biomedical applications.
Published Astronomers map mysterious element in space
(via sciencedaily.com) A research team has provided an important clue to the origin of the element Ytterbium in the Milky Way, by showing that the element largely originates from supernova explosions. The groundbreaking research also provides new opportunities for studying the evolution of our galaxy.
Published Low-cost, 3D printed device may broaden focused ultrasound use
(via sciencedaily.com) Medical researchers have developed a method for producing a low-cost, easy-to-use focused ultrasound device that can help open up the blood-brain barrier for non-invasive procedures and diagnostics.
Published Ancient dwarf galaxy reconstructed with MilkyWay@home volunteer computer
(via sciencedaily.com) Astrophysicists for the first time have calculated the original mass and size of a dwarf galaxy that was shredded in a collision with the Milky Way billions of years ago.
Published Musicians, chemists use sound to better understand science
(via sciencedaily.com) A team of researchers from music, chemistry and computer science is using sound to better understand biochemical processes such as the physical mechanisms of protein folding.
Published Ultraprecise atomic clock poised for new physics discoveries
(via sciencedaily.com) Physicists have made one of the highest performance atomic clocks ever. Their instrument, known as an optical lattice atomic clock, can measure differences in time to a precision equivalent to losing just one second every 300 billion years and is the first example of a 'multiplexed' optical clock, where six separate clocks can exist in the same environment. Its design allows the team to test ways to search for gravitational waves, attempt to detect dark matter, and discover new physics with clocks.
Published Speed of sound used to measure elasticity of materials
(via sciencedaily.com) Researchers have devised a revolutionary new technique for measuring the microscopic elasticity of materials. Known as SRAS, the technology works by measuring the speed of sound across the material's surface.
Published How galaxies can exist without dark matter
(via sciencedaily.com) Astrophysicists report how, when tiny galaxies collide with bigger ones, the bigger galaxies can strip the smaller galaxies of their dark matter -- matter that we can't see directly, but which astrophysicists think must exist because, without its gravitational effects, they couldn't explain things like the motions of a galaxy's stars.