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A rare volcano-triggered tsunami sparked by the eruption of Hunga Tonga-Hunga Ha’apai in Tonga could have been caused by shock waves or shifting underwater land, experts said Monday.

“A volcanic-source tsunami event is rare but not unprecedented,” a post on the website for New Zealand’s geological hazard monitoring system GNS said Monday.

GNS Tsunami Duty Officer Jonathan Hanson said it probably occurred in part thanks to a previous eruption of the same volcano one day earlier.

A University of Melbourne-led team has perfected a technique for embedding single atoms in a silicon wafer one-by-one. Their technology offers the potential to make quantum computers using the same methods that have given us cheap and reliable conventional devices containing billions of transistors.

“We could ‘hear’ the electronic click as each atom dropped into one of 10,000 sites in our prototype device. Our vision is to use this technique to build a very, very large-scale quantum device,” says Professor David Jamieson of The University of Melbourne, lead author of the Advanced Materials paper describing the process.

Continue reading “Building a silicon quantum computer chip atom” »

From the discovery of microorganisms in the field of biology to imaging atoms in the field of physics, microscopic imaging has improved our understanding of the world and has been responsible for many scientific advances. Now, with the advent of spintronics and miniature magnetic devices, there is a growing need for imaging at nanometer scales to detect quantum properties of matter, such as electron spins, magnetic domain structure in ferromagnets, and magnetic vortices in superconductors.

Typically, this is done by complementing standard microscopy techniques, such as scanning tunneling microscopy and atomic force microscopy (AFM), with magnetic sensors to create “scanning magnetometry probes” that can achieve nanoscale imaging and sensing. However, these probes often require ultrahigh vacuum conditions, extremely low temperatures, and are limited in spatial resolution by the probe size.

In this regard, nitrogen-vacancy (NV) centers in diamond (defects in diamond structure formed by nitrogen atoms adjacent to “vacancies” created by missing atoms) have gained significant interest. The NV pair, it turns out, can be combined with AFM to accomplish local magnetic imaging and can operate at room temperature and pressures. However, fabricating these probes involve complex techniques that do not allow for much control over the probe shape and size.

Researchers at Université de Montréal have created a nanoantenna to monitor the motions of proteins. Reported this week in Nature Methods, the device is a new method to monitor the structural change of proteins over time—and may go a long way to helping scientists better understand natural and human-designed nanotechnologies.

“The results are so exciting that we are currently working on setting up a start-up company to commercialize and make this nanoantenna available to most researchers and the pharmaceutical industry,” said UdeM chemistry professor Alexis Vallée-Bélisle, the study’s senior author.

Over the last thirty years, over 4,000 planets around stars other than the Sun, otherwise known as exoplanets, have been discovered by astronomers but only two exomoons. This is because usually planets are larger and therefore more easily identifiable.

The first exomoon candidate, which the same team of astronomers said was roughly the size of Neptune, was found in 2018 but has yet to be confirmed.

Archaeologists have discovered a 4,500-year-old highway network in Saudi Arabia lined with well-preserved ancient tombs.

Researchers from the University of Western Australia have carried out a wide-ranging investigation over the past year, involving aerial surveys conducted by helicopter, ground survey and excavation and examination of satellite imagery.

In findings published in the Holocene journal in December, they said the “funerary avenues” spanning large distances in the northwestern Arabian counties of Al-‘Ula and Khaybar had received little examination until quite recently.

2 big points from this. 1. Plasma dilution does reverse aging but a bit and the next question will be can it be done over and over to make you younger in steps. 2. She mentions wrapping up human test results and hopes to give the results at some point.

At the EARD 2021 conference, Dr. Irina Conboy discusses the rejuvenating effects of plasma dilution in old mice. Dr. Conboy also explains why she believes that the path of rejuvenation is through tissue maintenance and repair, not preventing tissue damage.

Continue reading “Dr. Irina Conboy — Rejuvenating Effects of Plasma Dilution” »

The bigger a quantum battery, the faster it charges.

Quantum batteries have the potential to store energy in a new class of compact, powerful devices that could boost our uptake of renewable energies and massively reduce our reliance on fossil fuels.

Now, an international group of scientists has taken an important step towards making these batteries a reality. According to a press statement from the University of Adelaide, the team has proved the crucial concept of superabsorption for the first time.

Continue reading “We Are One Step Closer to Incredibly Compact, Powerful Quantum Batteries” »

It takes off vertically then moves horizontally.

Zeva Aero, a Tacoma-based company looking to make vertical take-off and landing (VTOL) vehicles for a single pilot, reached a major milestone as its full-scale aircraft completed its maiden untethered flight, the company said in its press release.

Continue reading “The Zeva eVTOL That Moves Like Superman Completed Its First Test Flight” »