Reduced production time Unlike the SLM or EBM processes, the SLEDM process uses a high-power LED beam to melt the metal powder. The light-emitting diodes used for this purpose were specially adapted by the west Styrian lighting specialist Preworks and equipped with a complex lens system by which the diameter of the LED focus can be easily changed between 0.05 and 20 millimeters during the melting process. This enables the melting of larger volumes per unit of time without having to dispense with filigree internal structures, thus reducing the production time of components for fuel cell or medical technology, for example, by a factor of 20 on average....

In a normally reciprocal relationship that appears to go awry with age, sufficient tryptophan, which we consume in foods like milk, turkey, chicken, and oats, helps keep our microbiota healthy. A healthy microbiota, in turn, helps ensure that tryptophan mainly results in good things for us like producing the neurotransmitter serotonin, which reduces depression risk, and melatonin, which aids a good night’s sleep, says Dr. Sadanand Fulzele, an aging researcher in the Medical College of Georgia Department of Medicine....

Genetic engineers and genomics researchers should welcome the news from the Lawrence Berkeley National Laboratory (Berkeley Lab) where an international team of scientists has discovered a new and possibly more effective means of editing genomes. This discovery holds potentially big implications for advanced biofuels and therapeutic drugs, as genetically modified microorganisms, such as bacteria and fungi, are expected to play a key role in the green chemistry production of these and other valuable chemical products....

Michigan Technological University’s invisibility cloak researchers have done it again. They’ve moved the bar on one of the holy grails of physics: making objects invisible. Just last month, Elena Semouchkina, an associate professor of electrical and computer engineering at Michigan Tech, and her graduate student, Xiaohui Wang, reported successful experimental demonstration of the use of non-conductive ceramic metamaterials to cloak cylindrical objects from microwave-length electromagnetic waves. Previously, Semouchkina had designed a non-conductive glass metamaterial cloak that worked with infrared frequency waves, which are shorter than microwaves....

About 25 years ago, astrophysicists noticed something very interesting about the Universe. The fact that it was in a state of expansion had been known since the 1920s, thanks to the observation of Edwin Hubble. But thanks to the observations astronomers were making with the space observatory that bore his name (the Hubble Space Telescope), they began to notice how the rate of cosmic expansion was getting faster! This has led to the theory that the Universe is filled with an invisible and mysterious force, known as Dark Energy (DE)....

The four Crew-6 members are now Expedition 68 flight engineers embarking on a six-month space research mission. The new station crewmates are Stephen Bowen and Woody Hoburg of NASA along with Sultan Alneyadi of UAE (United Arab Emirates) and Andrey Fedyaev of Roscosmos. They are familiarizing themselves with station operations, systems, and emergency procedures. The new quartet is also beginning standard science and maintenance activities. Bowen and Hoburg started a new experiment today conducting ultrasound scans and collecting blood pressure measurements to learn how an astronaut’s eyes, brain, and blood vessels change during a space mission....

The fruits of Pollia condensata, which are found predominantly in Africa, have an iridescent hue that stays intense for years after the parent plant has perished. The fruit’s metallic blue hue is produced by specialized structures in its cells. Researchers at the University of Cambridge, UK, found that the cells of P. condensata had walls that were made of tightly coiled cellulose strands that are very efficient at reflecting light....

AI can detect signals that are informative about mental health from questionnaires and brain scans. A study published today by an interdisciplinary collaboration, directed by Denis Engemann from Inria, demonstrates that machine learning from large population cohorts can yield “proxy measures” for brain-related health issues without the need for a specialist’s assessment. The researchers took advantage of the UK Biobank, one of the world’s largest and most comprehensive biomedical databases, that contains detailed and secure health-related data on the UK population....

This August 23rd model shows black carbon particles in red from combustion processes, like smoke from the fires in the United States and Canada, spreading across large stretches of North America and Africa. Sea salt aerosols are in blue, swirling above threatening typhoons near South Korea and Japan, and the hurricane looming near Hawaii. Dust shown in purple hues is blowing over African and Asian deserts. The location of cities and towns can be found from the concentrations of lights based on satellite image data of the Earth at night....

“We showed that the supportive effect of fragrances works very reliably in everyday life and can be used in a targeted way,” said study leader PD Dr. Jürgen Kornmeier, head of the Perception and Cognition Research Group at the Freiburg-based IGPP and scientist at the Department of Psychiatry and Psychotherapy at the University of Freiburg – Medical Center in Germany. The smell of roses when learning and sleeping For the study, first author and student teacher Franziska Neumann conducted several experiments with 54 students from two 6th-grade classes of a school in southern Germany....

Take, for instance, two particles sitting on opposite edges of the universe. If they are truly entangled, then according to the theory of quantum mechanics their physical properties should be related in such a way that any measurement made on one particle should instantly convey information about any future measurement outcome of the other particle — correlations that Einstein skeptically saw as “spooky action at a distance.” In the 1960s, the physicist John Bell calculated a theoretical limit beyond which such correlations must have a quantum, rather than a classical, explanation....

The artifacts would be considered among the earliest evidence of people in North America. The findings, to be published tomorrow (August 30) in the journal Science, add weight to the hypothesis that initial human migration to the Americas followed a Pacific coastal route rather than through the opening of an inland ice-free corridor, said Loren Davis, a professor of anthropology at Oregon State University and the study’s lead author. “The Cooper’s Ferry site is located along the Salmon River, which is a tributary of the larger Columbia River basin....

The new research finds ocean passages typically plugged with ice in the winter and spring are opening up. Sea ice normally locked in the Arctic then can flow freely through these passages southward to routes used by shipping, fishing and ferry boats. The new study finds Arctic sea ice surged through these channels in 2017 and clogged normally open areas of ocean around Newfoundland in May and June. The ice cover trapped many unsuspecting ships and sunk some boats when the ice punctured their hulls....

Vaccines currently being developed for COVID-19 should not be affected by recent mutations in the virus, according to a new study involving a University of York virologist. Most vaccines under development worldwide have been modeled on the original ‘D-strain’ of the virus, which were more common amongst sequences published early in the pandemic. Since then, the virus has evolved to the globally dominant ‘G-strain’, which now accounts for about 85 percent of published SARS-CoV-2 genomes....

A recently published review led by UniSA Professor Peter Clifton reveals that people who use low-calorie sweeteners (LCS) are more likely to gain weight, the exact opposite of what consumers expect. This is despite controlled clinical trials showing that artificial sweeteners do lead to weight loss. There has been a 200 percent increase in LCS usage among children and a 54 percent increase among adults in the past 20 years, Prof Clifton says....

“This research has been underway since the first K2 data release in 2014.” Mayo is the main author of the work being presented in the Astronomical Journal. The research has been conducted partly as a senior project during his undergraduate studies at Harvard College. It has also involved a team of international colleagues from institutions such as NASA, Caltech, UC Berkeley, the University of Copenhagen, and the University of Tokyo....

As galaxies evolve over time, these winds are what cause the star formation rate to slow down. However, the primary sources of such winds have been attributed to material jets powered by black holes and shock waves from supernova explosions. Cosmic rays were assumed to be small contributors, especially in galaxies with prolific star formation, such as M33. “We have seen galactic winds driven by cosmic rays in our own Milky Way and the Andromeda galaxy, which have much weaker rates of star formation, but not before in a galaxy such as M33,” said Fatemah Tabatabaei, of the Institute for Research in Fundamental Sciences in Iran....

ESA’s Herschel space observatory has provided the first images of a dust belt – produced by colliding comets or asteroids – orbiting a subgiant star known to host a planetary system. The team of scientists who made the discovery published their results in the Oxford University Press journal Monthly Notices of the Royal Astronomical Society. After billions of years steadily burning hydrogen in their cores, stars like our Sun exhaust this central fuel reserve and start burning it in shells around the core....

Ever since Giotto visited Halley’s comet in 1986, a few spacecraft have flown close to several cometary nuclei. It turns out that most of them appeared to be elongated or even made up of two lobes, such as the well-known 67P/Churyumov–Gerasimenko, which was observed at very short range by the Rosetta spacecraft in 2014 and 2015. Astronomers believe that this astonishing shape can be explained by the merger of two formerly separate comets....

An active galactic nucleus (AGN) is a small region at the center of some galaxies that is far brighter than can be explained by the stellar population alone. The extremely luminous central region is emitting so much radiation that it can outshine the rest of the galaxy altogether. AGNs emit radiation across the entire electromagnetic spectrum, from radio waves to gamma rays. This radiation is produced by the action of a central supermassive black hole that is devouring material that gets too close to it....