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Because leviathan black holes would never fit in a lab, Jeff Steinhauer and his research team created a mini one right here on Earth.


When something rips physics apart, you cross over into the quantum realm, a place inhabited by black holes, wormholes and other things that have been the stars of multiple sci-fi movies. What lives in the quantum realm either hasn’t been proven to exist (yet) or behaves strangely if it does exist.

Black holes often venture into that realm. With these collapsed stars — at least most of them are — being impossible to fly a spacecraft into (unless you never want to see it again), one physicist decided that the best way to get up close to them was under a literal microscope. Jeff Steinhauer wanted to know whether black holes radiate particles like the late Stephen Hawking theorized they would. Because one of these leviathans would never fit in a lab, he and his research team created one right here on Earth.

“We have to understand how we see the Hawking radiation sound waves falling in and coming out,” Steinhauer, who co-authored a study recently published in Nature Physics, told SYFY WIRE. “They should be very slight. Seeing this radiation from a real black hole is too weak and would be totally overpowered by other sources of radiation, which is why we want to see it in an analog system.”

😀


Tesla hasn’t yet shipped the Cybertruck, or the full-size Cyberquad that made a splashy debut at the introduction of its Blade Runner-esque pickup truck, but you can get a mini Cyberquad designed for the kiddos starting in 2–4 weeks if you order one right now from its website.

The Tesla “Cyberquad for Kids” is available to purchase on Tesla’s site for $1,900 — a steep price relative to your average Power Wheels, but the lowest-priced vehicle in Tesla’s existing lineup by far. And the Cyberquad’s materials are a cut above your average battery electric kid car, with a “full steel frame,” along with cushioned seating and fully adjustable suspension.

It may be the cheapest Tesla you can buy, but it’s also the most limited when it comes to range: You’ll get up to around 15 miles on a full charge, which takes five hours, according to the company. It’s also not going to break any land speed records, with a speedometer that tops out at 10 mph (which you can limit to a max of 5 mph for safety, if desired). That’s still plenty fast for a kid’s ride-on vehicle, which is probably why Tesla labels this one as designed for kids at least 8 and up, with a max weight of 150 lbs.

Bongard said they found that the xenobots, which were initially sphere-shaped and made from around 3,000 cells, could replicate. But it happened rarely and only in specific circumstances. The xenobots used “kinetic replication” — a process that is known to occur at the molecular level but has never been observed before at the scale of whole cells or organisms, Bongard said.


The US scientists who created the first living robots say the life forms, known as xenobots, can now reproduce — and in a way not seen in plants and animals.

Formed from the stem cells of the African clawed frog (Xenopus laevis) from which it takes its name, xenobots are less than a millimeter (0.04 inches) wide. The tiny blobs were first unveiled in 2020 after experiments showed that they could move, work together in groups and self-heal.

Now the scientists that developed them at the University of Vermont, Tufts University and Harvard University’s Wyss Institute for Biologically Inspired Engineering said they have discovered an entirely new form of biological reproduction different from any animal or plant known to science.

With Gauss Rifles [military squads] could pitch a solar panel, charge their guns’ batteries, and fire nuts and bolts off the ground as ammunition.


“You can hold far more energy in batteries than you can with gunpowder,” Wirth told Futurism. And a battery eliminates the need for “explosive chemical propellants.”

But it’s an entirely new type of armament that could have some potentially dangerous consequences, opening the doors to turn anything from metal rods to nuts and bolts into deadly projectiles. And its creators are already imagining military applications.

“Imagine a scenario where a military squad is pinned down behind enemy lines and they’re out of ammunition,” Wirth told us. “With Gauss Rifles they could pitch a solar panel, charge their guns’ batteries, and fire nuts and bolts off the ground as ammunition.”

Blackholes are a breakdown in the equations of spacetime. This means both space and time no longer behave the way we would expect of them.
Today we explore the breakdown in time around blackholes and what it means to interact with the event horizon, or the place where time appears to stand still.

Further Reading/Consumption:

Black holes & time warps: einstein’s outrageous legacy — kip thorne.

Your Daily Equation #31: BLACK HOLES: And Why Time Slows Down When You Are Near One — https://youtu.be/qph51qUgwgU

Circa 2017


“Enabling early detection of diseases is one of the greatest opportunities we have for developing effective treatments,” Esfandyarpour said. “Maybe $1 in the U.S. doesn’t count that much, but somewhere in the developing world, it’s a lot of money.”

A two-part system

Circa 2018 #artificialintelligence #doctor


Abstract: Online symptom checkers have significant potential to improve patient care, however their reliability and accuracy remain variable. We hypothesised that an artificial intelligence (AI) powered triage and diagnostic system would compare favourably with human doctors with respect to triage and diagnostic accuracy. We performed a prospective validation study of the accuracy and safety of an AI powered triage and diagnostic system. Identical cases were evaluated by both an AI system and human doctors. Differential diagnoses and triage outcomes were evaluated by an independent judge, who was blinded from knowing the source (AI system or human doctor) of the outcomes. Independently of these cases, vignettes from publicly available resources were also assessed to provide a benchmark to previous studies and the diagnostic component of the MRCGP exam. Overall we found that the Babylon AI powered Triage and Diagnostic System was able to identify the condition modelled by a clinical vignette with accuracy comparable to human doctors (in terms of precision and recall). In addition, we found that the triage advice recommended by the AI System was, on average, safer than that of human doctors, when compared to the ranges of acceptable triage provided by independent expert judges, with only a minimal reduction in appropriateness.

From: Yura Perov N [view email]

[v1] Wed, 27 Jun 2018 21:18:37 UTC (54 KB)