Science X Newsletter Tuesday, Sep 8

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Here is your customized Science X Newsletter for September 8, 2020:

Spotlight Stories Headlines

A device that can produce electroluminescence from infrared to ultraviolet wavelengths

Real-time imaging shows how SARS-CoV-2 attacks human cells

Study highlights the role of astrocytes in the formation of remote memories

Cataclysmic variable V1460 Her has a fast spinning white dwarf accreting from an evolved donor star, study finds

Kondo physics in antiferromagnetic Weyl semimetal films

Facebook focuses on smart audio for AR glasses

Meteorites show transport of material in early solar system

In EU, 1 in 8 deaths linked to pollution: report

Brain's immune cells promising cellular target for therapeutics

A lack of oxygen in tumors promotes metastasis

Betrayal or cooperation? Analytical investigation of behavior drivers

Restoring the filtration efficiency of N95 masks after they have been cleaned

Brain stimulation reduces dyslexia deficits

Study finds surprisingly little difference in hospitalization rates between children with COVID-19

Some children at higher risk of privacy violations from digital apps

Physics news

Kondo physics in antiferromagnetic Weyl semimetal films

Emerging quantum materials can be defined by topology and strong electron correlations, although their applications in experimental systems are relatively limited. Weyl semimetals incorporating magnetism offer a unique and fertile platform to explore emerging phenomena in developing topological matter and topological spintronics. The triangular antiferromagnet Mn3Sn exhibits many exotic physical properties as an antiferromagnetic (AFM) Weyl semimetal (WSM), including an attractively large spontaneous Hall effect.

Betrayal or cooperation? Analytical investigation of behavior drivers

When looking at humanity from a macroscopic perspective, there are numerous examples of people cooperating to form societies, countries, religions, and other groupings.

Restoring the filtration efficiency of N95 masks after they have been cleaned

N95 masks are a critical part of the personal protective equipment used by front-line health care workers. These masks achieve 95% efficiency at filtering out tiny 0.3-micron particles, while maintaining reasonable breathability, thanks to a layer of fine melt-blown polypropylene fibers incorporating electrical charges to attract particles.

Predictions of magnetic field response in 2-D valleytronics materials

NUS researchers have developed a parameter-free approach to quantitatively predict the response of two-dimensional (2-D) valleytronics materials to an external magnetic field. These predictions are important because they provide insights into the many-body effects into a fascinating property of these materials that enables the magnetic field to increase the stability of one valley (bit "one") over the other (bit "zero").

Devitrification demystified: Scientists show how glass crystallizes in real-time

Glass is amorphous in nature—its atomic structure does not involve the repetitive arrangement seen in crystalline materials. But occasionally, it undergoes a process called devitrification, which is the transformation of a glass into a crystal—often an unwanted process in industries. The dynamics of devitrification remain poorly understood because the process can be extremely slow, spanning decades or more.

Terahertz receiver for 6G wireless communications

Future wireless networks of the 6th generation (6G) will consist of a multitude of small radio cells that need to be connected by broadband communication links. In this context, wireless transmission at THz frequencies represents a particularly attractive and flexible solution. Researchers at Karlsruhe Institute of Technology (KIT) have now developed a novel concept for low-cost terahertz receivers that consist of a single diode in combination with a dedicated signal processing technique. In a proof-of-concept experiment, the team demonstrated transmission at a data rate of 115 Gbit/s and a carrier frequency of 0.3 THz over a distance of 110 meters. The results are reported in Nature Photonics.

Quantum light squeezes the noise out of microscopy signals

Researchers at the Department of Energy's Oak Ridge National Laboratory used quantum optics to advance state-of-the-art microscopy and illuminate a path to detecting material properties with greater sensitivity than is possible with traditional tools.

Researchers make tiny, yet complex fiber optic force sensor

Researchers have developed a tiny fiber optic force sensor that can measure extremely slight forces exerted by small objects. The new light-based sensor overcomes the limitations of force sensors based on micro-electro-mechanical sensors (MEMS) and could be useful for applications from medical systems to manufacturing.

Researchers use waveguides for sensitive protease monitoring

For the first time, researchers have detected protease activity with surface-enhanced Raman spectroscopy (SERS) performed using a tiny waveguide. The work paves the way to real-time, label-free lab-on-a-chip protease monitoring, which could offer a high-throughput approach to screen for new drugs that inhibit proteases involved in disease.

Astronomy and Space news

Cataclysmic variable V1460 Her has a fast spinning white dwarf accreting from an evolved donor star, study finds

An international team of astronomers has conducted spectroscopic and photometric observations of a cataclysmic variable (CV) known as V1460 Her. Results of the study indicate that the system consists of a fast-spinning white dwarf that accretes matter from its evolved companion star. The finding is reported in a paper published August 30 on arXiv.org.

Meteorites show transport of material in early solar system

New studies of a rare type of meteorite show that material from close to the Sun reached the outer solar system even as the planet Jupiter cleared a gap in the disk of dust and gas from which the planets formed. The results, published this week in Proceedings of the National Academy of Sciences, add to an emerging understanding of how our Solar System formed and how planets form around other stars.

METISSE offers new insights into the lives of massive stars

Massive stars are those larger than about 10 times the mass of the sun and are born far less often than their low-mass counterparts. However, they contribute the most to the evolution of star clusters and galaxies. Massive stars are the precursors of many vivid and energetic phenomena in the universe, including enriching their surroundings in supernova explosions and altering the dynamics of their systems.

Rainbow comet with a heart of sponge

A permeable heart with a hardened facade—the resting place of Rosetta's lander on Comet 67P/Churyumov-Gerasimenko is revealing more about the interior of the "rubber duck" shaped-body looping around the Sun.

NASA scientists find depletion of halogens due to giant impact

It's been more than 50 years since the Apollo missions, and in that time, chemical analyses of the recovered lunar materials have revolutionized our understanding of planetary materials. One of the major findings as a result of this research is the recognition that the moon is exceptionally depleted in particular volatile elements, and that these moon rocks also exhibit large chemical anomalies unlike anything seen on Earth.

Australian telescope finds no signs of alien technology in 10 million star systems

A radio telescope in outback Western Australia has completed the deepest and broadest search at low frequencies for alien technologies, scanning a patch of sky known to include at least 10 million stars.

Sensors of world's largest digital camera snap first 3,200-megapixel images at SLAC

Crews at the Department of Energy's SLAC National Accelerator Laboratory have taken the first 3,200-megapixel digital photos—the largest ever taken in a single shot—with an extraordinary array of imaging sensors that will become the heart and soul of the future camera of Vera C. Rubin Observatory.

Okay, new idea: 'Oumuamua is an interstellar 'dust bunny'

Explaining the concept of a dust bunny to small children can be quite amusing. No, it's not actually alive. It's moving around because of really small currents of wind that we can't even see. It's mainly formed out of dead skin and spider webs. No, the spiders don't actually eat the dead skin. Most of the time.

Technology news

A device that can produce electroluminescence from infrared to ultraviolet wavelengths

Electroluminescence (EL), electrically produced luminescence, is crucial to the operation of many electronic devices that are designed to emit light. EL can theoretically be achieved in devices with a variety of structures and made of different materials. However, to be electroluminescent, these devices need to have a number of core features that allow them to support specific light-emitting materials.

Facebook focuses on smart audio for AR glasses

Inspirational speaker and Amazon best-selling author Sanjo Jendayi once said, "Listening doesn't always equate to hearing. Hearing doesn't always lead to understanding, but active listening helps each person truly 'see' the other."

Successful maiden flight for energy-efficient Flying-V aircraft

This summer, a team of researchers, engineers and a drone pilot of TU Delft traveled to an airbase in Germany for the first real test flight of the scaled flight model of the energy-efficient aircraft design called the Flying-V. The project was announced last year together with KLM. After a period of extensive wind tunnel testing and a series of ground tests in the Netherlands, it was time to perform the first flight and obtain an impression of the flight characteristics. The aircraft had a very successful maiden flight.

A robot that controls highly flexible tools

How do you calculate the coordinated movements of two robot arms so they can accurately guide a highly flexible tool? ETH researchers have integrated all aspects of the optimisation calculations into an algorithm. A hot-wire cutter will be used, among other things, to develop building blocks for a mortar-free structure.

Lightweight green supercapacitors could quickly charge devices

In a new study, researchers at Texas A&M University have described their novel plant-based energy storage device that could charge even electric cars within a few minutes in the near future. Furthermore, they said their devices are flexible, lightweight and cost-effective.

EasyJet trims flights on weak demand, quarantine rules

EasyJet said Tuesday that it will cut flights on the uncertain demand outlook after the government decided to impose coronavirus quarantines on seven Greek islands.

US aviation authority investigating Boeing 787 manufacturing flaws

The US aviation authority is investigating manufacturing flaws in the Boeing 787 after the company reported that certain plane parts did not conform to its production standards.

Bring in the experts: It's time to secure your home network

Not all that long ago, managing your home network's security didn't involve much more than installing an antivirus program on your PC. If only it were still so simple.

GM to make electric vehicle, supply batteries for Nikola

General Motors announced its second major electric vehicle partnership in less than a week on Tuesday, this time a $2 billion deal with startup Nikola.

First 5G iPhone expected at Apple online event Sept 15

Apple on Tuesday fired off invitations to a September 15 online event expected to star the first iPhone tailored for superfast 5G telecom networks.

Swiss official airs concerns about data privacy in US

A Swiss federal commissioner announced Tuesday that a U.S.-Swiss program aimed to protect personal information exchanged between the two countries doesn't go far enough, and has downgraded the United States to rank it as a country deemed to have inadequate data protection.

Boeing says new problem to delay deliveries of 787 Dreamliner

Boeing said Tuesday it has found a new production issue that will impact deliveries of its 787 Dreamliner, in the latest blow to the aviation giant.

Apple seeks damages from Fortnite maker in App Store dispute

Apple on Tuesday asked a US federal court to order Fortnite maker Epic Games to pay damages in a legal dispute over the rules for the iPhone maker's online marketplace.

Uber incentivizes drivers to switch to electric vehicles

Uber is offering incentives to drivers to transition to cleaner vehicles while acknowledging that emissions from its rides have risen in recent years.

Microsoft says small Xbox S game console on the way

Microsoft on Tuesday confirmed that it will launch a small Xbox S game console priced at $299 in November.

TikTok scrambles to remove suicide video clips, ban users

TikTok says it's working to remove videos of a man apparently taking his own life and banning users that keep trying to spread the clips on the popular social media platform.

Google abandons Dublin office plan for up to 2,000 staff

Google says it is dropping talks to rent office space for up to 2,000 staff in Dublin, after most of the US tech giant's employees were told to work from home until 2021 amid the global pandemic.

F1 champ Lewis Hamilton sets up electric offroad team

Formula One champion Lewis Hamilton has launched a team to compete in an all-electric offroad racing series, though he won't be behind the wheel.


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