Showing 20 articles starting at article 841
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Categories: Engineering: Biometric, Space: Exploration
Published New research on imposter stars may improve astronomical data
(via sciencedaily.com) Quick flashes of light reflecting from satellites and debris in Earth's orbit are extremely common, according to new findings that may improve the accuracy of astronomical data. For the first time, astronomers report the flashes, which are often mistaken for stars, occur more than 1,000 times an hour across the sky.
Published The craters on Earth
(via sciencedaily.com) A two-volume atlas presents and explains the impact sites of meteorites and asteroids worldwide.
Published Streetlights contribute less to nighttime light emissions in cities than expected
(via sciencedaily.com) When satellites take pictures of Earth at night, how much of the light that they see comes from streetlights? A team of scientists have answered this question for the first time using the example of the U.S. city of Tucson, thanks to 'smart city' lighting technology that allows dimming. The result: only around 20 percent of the light in the Tucson satellite images comes from streetlights.
Published Signals from distant stars connect optical atomic clocks across Earth for the first time
(via sciencedaily.com) Using radio telescopes observing distant stars, scientists have connected optical atomic clocks on different continents.
Published 3D biometric authentication based on finger veins almost impossible to fool
(via sciencedaily.com) Biometric authentication, which uses unique anatomical features such as fingerprints or facial features to verify a person's identity, is increasingly replacing traditional passwords for accessing everything from smartphones to law enforcement systems.
Published Faint orbital debris that threatens satellites not being monitored closely enough, warn astronomers
(via sciencedaily.com) Astronomers are warning that orbital debris posing a threat to operational satellites is not being monitored closely enough, as they publish a new survey finding that over 75% of the orbital debris they detected could not be matched to known objects in public satellite catalogues.
Published Secret weapon to stop invasive honeysuckle: Satellites
(via sciencedaily.com) Researchers found that satellite imagery can identify non-native and invasive Amur honeysuckle, an ornamental shrub introduced from Asia that has spread in forests across much of the United States.
Published Huge ring-like structure on Ganymede's surface may have been caused by violent impact
(via sciencedaily.com) Image data reanalysis has revealed that ancient tectonic troughs are concentrically distributed across almost the entire surface of Jupiter's moon Ganymede. Computer simulation results suggest that this giant crater could have resulted from the impact of an asteroid with a 150-kilometer radius. If so, this the largest impact structure identified in the solar system so far.
Published The quiet Sun is much more active than we thought
(via sciencedaily.com) For a long time, researchers have believed that there is not much of interest going on in the Sun during the passive period, therefore not worth studying. Now this assumption is showed to be false. This is the first time that astronomers are systematically studying the phenomena of the solar minimum.
Published Safer CRISPR gene editing with fewer off-target hits
(via sciencedaily.com) The CRISPR system is a powerful tool for the targeted editing of genomes, with significant therapeutic potential, but runs the risk of inappropriately editing ''off-target'' sites. However, a new study shows that mutating the enzyme at the heart of the CRISPR gene editing system can improve its fidelity.
Published Using sunlight to save satellites from a fate of 'space junk'
(via sciencedaily.com) Satellites are almost always illuminated by the sun, apart from short transitions to Earth's shadow. The light that a satellite reflects can help reveal the solution to a structural malfunction.
Published Speed of space storms key to protecting astronauts and satellites from radiation
(via sciencedaily.com) Measuring the speed of coronal mass ejections (CMEs) as they erupt from the sun, in addition to their size, found to be crucial in providing accurate early warnings that keep astronauts and technology safe.
Published FloChiP, a new tool optimizing gene-regulation studies
(via sciencedaily.com) Scientists have developed a tool called FloChip, a new microfluidic take on the widely used chromatin immunoprecipitation (ChIP) technique. By automating and cutting the cost of ChIP and sequential-ChIP, FloChIP has the potential to become a widely used tool for the study of chromatin biology and gene regulation.
Published High-security identification that cannot be counterfeited
(via sciencedaily.com) Researcher have used the principles that underpin the whispering-gallery effect to create an unbeatable anti-counterfeiting system. The researchers' system is a microchip consisting of two-step authentication. Step 1 is the visible pattern on the chip. Step 2 is the non-forgeable color fingerprint of the chip. These microchips will be useful for high-security authentication.
Published Solving the space junk problem
(via sciencedaily.com) Aging satellites and space debris crowd low-Earth orbit, and launching new satellites adds to the collision risk. The most effective way to solve the space junk problem, according to a new study, is not to capture debris or deorbit old satellites: it's an international agreement to charge operators 'orbital-use fees' for every satellite put into orbit.
Published Chocolate 'fingerprints' could confirm label claims
(via sciencedaily.com) The flavor and aroma of a fine chocolate emerge from its ecology, in addition to its processing. But can you be certain that the bar you bought is really from the exotic locale stated on the wrapper? Now, researchers are presenting a method for determining where a particular chocolate was produced by looking at its chemical 'fingerprint.'
Published The Milky Way's satellites help reveal link between dark matter halos and galaxy formation
(via sciencedaily.com) Just like we orbit the sun and the moon orbits us, the Milky Way has satellite galaxies with their own satellites. Drawing from data on those galactic neighbors, a new model suggests the Milky Way should have an additional 100 or so very faint satellite galaxies awaiting discovery.
Published Smartphone videos produce highly realistic 3D face reconstructions
(via sciencedaily.com) Normally, it takes pricey equipment and expertise to create an accurate 3D reconstruction of someone's face. Now, researchers have pulled off the feat using video recorded on an ordinary smartphone. Shooting a continuous video of the front and sides of the face generates a dense cloud of data. A two-step process uses that data, with some help from deep learning algorithms, to build a digital reconstruction of the face.
Published Safety zone saves giant moons from fatal plunge
(via sciencedaily.com) Numerical simulations showed that the temperature gradient in the disk of gas around a young gas giant planet could play a critical role in the development of a satellite system dominated by a single large moon, similar to Titan around Saturn. Researchers found that dust in the circumplanetary disk can create a 'safety zone,' which keeps the moon from falling into the planet as the system evolves.
Published Impact of satellite constellations on astronomical observations
(via sciencedaily.com) Astronomers have recently raised concerns about the impact of satellite mega-constellations on scientific research. To better understand the effect these constellations could have on astronomical observations, ESO commissioned a scientific study of their impact, focusing on observations with ESO telescopes in the visible and infrared but also considering other observatories.