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Categories: Physics: Acoustics and Ultrasound, Space: Structures and Features
Published Distant galaxies and the true nature of dark matter
(via sciencedaily.com) In conflict with the current prevailing theory used to describe the universe, a new study suggests the existence of a direct interaction between the elementary particles that make up the dark matter halo and those that make up ordinary matter.
Published Debris from disintegrating planets hurtling into white dwarfs across the galaxy
(via sciencedaily.com) The moment that debris from destroyed planets impacts the surface of a white dwarf star has been observed. Astronomers saw X-rays from planetary debris heated to a million degrees as it fell onto the dead core of its host star.
Published Too many disk galaxies than theory allows
(via sciencedaily.com) The Standard Model of Cosmology describes how the universe came into being according to the view of most physicists. Researchers have now studied the evolution of galaxies within this model, finding considerable discrepancies with actual observations.
Published Balancing sustainability, safety and comfort in engineered floor slabs
(via sciencedaily.com) Using less material in floors is a viable strategy for improving sustainability in buildings, as it can reduce the structure's environmental footprint. Prioritizing only this goal, however, can lead to unwanted effects -- such as an echo in a room or noise traveling between floors, according to architectural engineers.
Published Shadow of cosmic water cloud reveals the temperature of the young universe
(via sciencedaily.com) Astronomers have found a new and original method for measuring the cosmic microwave background's temperature when the Universe was still in its infancy. They confirm in their new study the early cooling of our Universe shortly after the Big Bang and open up new perspectives on the elusive dark energy.
Published Assessing and optimizing the quality of sensor networks
(via sciencedaily.com) When building sensor networks, it can be extremely challenging for researchers to determine how the sensors should be arranged to obtain optimal results. New research proposes a new way to quantify the quality of sensor networks, and uses this method to suggest improvements to existing Dark Matter experiments.
Published A new amplifying technique for weak and noisy signals
(via sciencedaily.com) Scientists have demonstrated a technique for the recovery of weak, noise-dominated optical signals.
Published Scientists explain mysterious finger-like features in solar flares
(via sciencedaily.com) Astronomers have presented a new explanation for the mysterious downward-moving dark voids seen in some solar flares.
Published Ultrasound technique predicts hip dysplasia in infants
(via sciencedaily.com) A technique that uses ultrasound images to determine the depth and shape of the hip socket can accurately predict which infants with hip dysplasia will develop normal hip structure and which remain dysplastic, according to a new study. Researchers said statistical shape modeling improves on existing techniques and could spare many infants from unnecessary treatment.
Published Worldwide coordinated search for dark matter
(via sciencedaily.com) An international team of researchers has published comprehensive data on the search for dark matter using a worldwide network of optical magnetometers. According to the scientists, dark matter fields should produce a characteristic signal pattern that can be detected by correlated measurements at multiple stations of the GNOME network.
Published When graphene speaks, scientists can now listen
(via sciencedaily.com) Brothers working in a lab discover that sound can be used to analyze the properties of laser-induced graphene in real time.
Published Owl wing design reduces aircraft, wind turbine noise pollution
(via sciencedaily.com) Researchers used the characteristics of owl wings to inform airfoil design and significantly reduce trailing-edge noise. The team used noise calculation and analysis software to conduct a series of detailed theoretical studies of simplified airfoils with characteristics reminiscent of owl wings. They applied their findings to suppress the noise of rotating machinery. Improving the flow conditions around the trailing edge and optimizing the shape of the edge suppressed the noise.
Published New treasure trove of globular clusters holds clues about galaxy evolution
(via sciencedaily.com) Using observations of Centaurus A, a nearby elliptical galaxy, obtained with the Gaia space telescope and ground-based instruments under the PISCeS survey, a team of astronomers presents an unprecedented number of globular cluster candidates in the outer regions of the galaxy. The findings provide astronomers with an even more detailed picture of galactic architecture and history of collisions and mergers.
Published Twelve for dinner: The Milky Way’s feeding habits shine a light on dark matter
(via sciencedaily.com) Astronomers are one step closer to revealing the properties of dark matter enveloping our Milky Way galaxy, thanks to a new map of twelve streams of stars orbiting within our galactic halo.
Published The first topological acoustic transistor
(via sciencedaily.com) Researchers have designed and simulated the first topological acoustic transistors -- with sound waves instead of electrons -- and proposed a connection architecture to form a universal logic gate that can switch the flow of sound on and off.
Published Are black holes and dark matter the same?
(via sciencedaily.com) Astrophysicists suggest that primordial black holes account for all dark matter in the universe.
Published New research sheds light on how ultrasound could be used to treat psychiatric disorders
(via sciencedaily.com) A new study has shown how the brain gives credit to events, along with how transcranial ultrasound (TUS) can disrupt this process. While currently developed in an animal model, this line of research and the use of TUS could one day be applied to clinical research to tackle conditions such as addiction.
Published Secret embraces of stars revealed by Alma
(via sciencedaily.com) Unlike our Sun, most stars live with a companion. Sometimes, two come so close that one engulfs the other -- with far-reaching consequences. When astronomers used the telescope Alma to study 15 unusual stars, they were surprised to find that they all recently underwent this phase. The discovery promises new insight on the sky's most dramatic phenomena -- and on life, death and rebirth among the stars.
Published Gunfire or plastic bag popping? Trained computer can tell the difference
(via sciencedaily.com) Engineering researchers have developed a gunshot detection algorithm and classification model that can discern similar sounds such as gunfire or a plastic bag popping. Discerning between a dangerous audio event like a gun firing and a non-life-threatening event, such as a plastic bag bursting, can mean the difference between life and death. Additionally, it also can determine whether or not to deploy public safety workers. Humans, as well as computers, often confuse the sounds of a plastic bag popping and real gunshot sounds.
Published Infant stars identified at the center of our galaxy
(via sciencedaily.com) A cosmic object originally classified as a gas and dust cloud actually consists of three stars and could resolve a controversy among astronomers.