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Aug 5, 2021

‘Lost Atlantis’ pieced together

Posted by in category: education

The landmass that was swallowed by a tsunami more than 8200 years ago is called Doggerland, and now a team of archaeologists inspecting the area along the Dutch coastline has gathered enough data to piece together what Doggerland looked it.

According to a report from The Guardian, more than 200 objects from Doggerland were discovered by archaeologists, and those objects included things such as a deer bone that had an arrowhead embedded in it, fossils, mammoth molars, and a skull fragment from a young Neanderthal.

Dr. Sasja van der Vaart-Verschoof, assistant curator of at the National Museum of Antiquities prehistory department in Leiden said, “We have a wonderful community of amateur archaeologists who almost daily walk these beaches and look for the fossils and artefacts, and we work with them to analyse and study them.

Aug 5, 2021

Quantum Crystal With “Time Reversal” Could Be a New Dark Matter Sensor

Posted by in categories: cosmology, particle physics, quantum physics

Physicists at the National Institute of Standards and Technology (NIST) have linked together, or “entangled,” the mechanical motion and electronic properties of a tiny blue crystal, giving it a quantum edge in measuring electric fields with record sensitivity that may enhance understanding of the universe.

The quantum sensor consists of 150 beryllium ions (electrically charged atoms) confined in a magnetic field, so they self-arrange into a flat 2D crystal just 200 millionths of a meter in diameter. Quantum sensors such as this have the potential to detect signals from dark matter — a mysterious substance that might turn out to be, among other theories, subatomic particles that interact with normal matter through a weak electromagnetic field. The presence of dark matter could cause the crystal to wiggle in telltale ways, revealed by collective changes among the crystal’s ions in one of their electronic properties, known as spin.

As described in the August 6, 2021, issue of Science, researchers can measure the vibrational excitation of the crystal — the flat plane moving up and down like the head of a drum — by monitoring changes in the collective spin. Measuring the spin indicates the extent of the vibrational excitation, referred to as displacement.

Aug 5, 2021

Synthetic extracellular matrices with tailored adhesiveness and degradability support lumen formation during angiogenic sprouting

Posted by in categories: bioengineering, biotech/medical

Current tissue engineering strategies lack materials that promote angiogenesis. Here the authors develop a microfluidic in vitro model in which chemokine-guided endothelial cell sprouting into a tunable hydrogel is followed by the formation of perfusable lumens to determine the material properties that regulate angiogenesis.

Aug 5, 2021

Light bending and X-ray echoes from behind a supermassive black hole

Posted by in category: cosmology

One of the key predictions of general relativity, the bending of light around massive, compact objects, is observed for a supermassive black hole in the galaxy I Zwicky 1.

Aug 5, 2021

Prolonged disorders of consciousness: a critical evaluation of the new UK guidelines

Posted by in categories: biotech/medical, health, law, neuroscience

Public health information (CDC)

Research information (NIH)

SARS-CoV-2 data (NCBI)

Continue reading “Prolonged disorders of consciousness: a critical evaluation of the new UK guidelines” »

Aug 5, 2021

Air Force Directed Energy Report Argues Defensive Force Fields May Be “Just On The Horizon”

Posted by in categories: drones, energy, military

The Air Force Research Laboratory at Kirtland Air Force Base has released a new analysis of the Department of Defense’s investments into directed energy technologies, or DE. The report, titled “Directed Energy Futures 2060,” makes predictions about what the state of DE weapons and applications will be 40 years from now and offers a range of scenarios in which the United States might find itself either leading the field in DE or lagging behind peer-state adversaries. In examining the current state of the art of this relatively new class of weapons, the authors claim that the world has reached a “tipping point” in which directed energy is now critical to successful military operations.

One of the document’s most eyebrow-raising predictions is that a “force field” could be created by “a sufficiently large fleet or constellation of high-altitude DEW systems” that could provide a “missile defense umbrella, as part of a layered defense system, if such concepts prove affordable and necessary.” The report cites several existing examples of what it calls “force fields,” including the Active Denial System, or “pain ray,” as well as non-kinetic counter-drone systems, and potentially counter-missile systems, that use high-power microwaves to disable or destroy their targets. Most intriguingly, the press release claims that “the concept of a DE weapon creating a localized force field may be just on the horizon.”

Aug 5, 2021

Air Force Throws Millions At Startup Trying To Build Reusable Hypersonic Aircraft

Posted by in category: transportation

The Air Force wants Hermeus Corporation to prove the concept for a high-speed transport, and maybe more.

Aug 5, 2021

Kratos Says Secret “Off-Board Sensing Station” Unmanned Aircraft Will Be Transformative

Posted by in categories: drones, robotics/AI, security

The U.S. Air Force is looking to field a new type of low-cost yet advanced drone to be used as an “Off-Board Sensing Station,” or OBSS. Details remain very limited, and the few publicly available Air Force Research Laboratory documents on the program state that specifics are only available to approved contractors. Still, according to Kratos, one of the companies involved with the effort, the new unmanned platform could potentially end up being as revolutionary as the firm’s stealthy XQ-58 Valkyrie has been.

The remarks about the OBSS program were made by Eric DeMarco, President and Chief Executive Officer of Kratos Defense & Security Solutions, during a company earnings call this week. DeMarco says that if the program is successful, the company believes it “could ultimately be as significant and transformational to Kratos as we expect Valkyrie to be.” The CEO added that the OBSS program is a signal that “the total addressable market opportunity for Kratos’ class of tactical drones is rapidly expanding and clarifying, as the Department of Defense strives for affordable force multiplier systems and technologies.”

Aug 5, 2021

Connectomes across development reveal principles of brain maturation

Posted by in category: neuroscience

Serial-section electron microscopy is used to reconstruct the full brain connectome of eight individual Caenorhabditis elegans at various stages of development, providing insight into the principles underlying brain maturation.

Aug 5, 2021

Fabricating functional circuits on 3D freeform surfaces via intense pulsed light-induced zinc mass transfer

Posted by in categories: internet, nanotechnology, wearables

Deployment of functional circuits on a 3D freeform surface is of significant interest to wearable devices on curvilinear skin/tissue surfaces or smart Internet-of-Things with sensors on 3D objects. Here we present a new fabrication strategy that can directly print functional circuits either transient or long-lasting onto freeform surfaces by intense pulsed light-induced mass transfer of zinc nanoparticles (Zn NPs). The intense pulsed light can locally raise the temperature of Zn NPs to cause evaporation. Lamination of a kirigami-patterned soft semi-transparent polymer film with Zn NPs conforming to a 3D surface results in condensation of Zn NPs to form conductive yet degradable Zn patterns onto a 3D freeform surface for constructing transient electronics. Immersing the Zn patterns into a copper sulfate or silver nitrate solution can further convert the transient device to a long-lasting device with copper or silver. Functional circuits with integrated sensors and a wireless communication component on 3D glass beakers and seashells with complex surface geometries demonstrate the viability of this manufacturing strategy.