Lifeboat Foundation

Flying taxis, more technically known as electric vertical take-off and landing (eVTOL) vehicles, might actually — finally — become a feasible technology thanks to a new development in battery technology.

Ironically, the hardest part of designing and building eVTOLs isn’t the vehicle itself. Instead, it’s solving the challenging energy situation that eVTOLs face: Any battery that’s powerful enough to lift the thing is almost certainly too heavy and slow-charging to make a trip worthwhile. But a team of Pennsylvania State University engineers tested new batteries that can both recharge in a matter of minutes and survive thousands of charge cycles, according to research published Monday in the journal Joule, making eVTOLs seem a whole lot more realistic.

The energy-dense lithium-ion batteries represent a major leap forward in electric vehicle energy tech, according to The Independent. Both could be charged for a 50-mile journal in under ten minutes, making eVTOLs far more economically viable because each vehicle could take more trips per day.

Researchers have discovered a new electronic property at the frontier between the thermal and quantum sciences in a specially engineered metal alloy—and in the process identified a promising material for future devices that could turn heat on and off with the application of a magnetic “switch.”

In this material, electrons, which have a mass in vacuum and in most other materials, move like massless photons or light—an unexpected behavior, but a phenomenon theoretically predicted to exist here. The alloy was engineered with the elements bismuth and antimony at precise ranges based on foundational theory.

Under the influence of an external magnetic field, the researchers found, these oddly behaving electrons manipulate heat in ways not seen under normal conditions. On both the hot and cold sides of the material, some of the electrons generate heat, or energy, while others absorb energy, effectively turning the material into an energy pump. The result: A 300% increase in its thermal conductivity.

The landmark decision has been eagerly awaited by millions but will be hotly contested by some experts doubt the drug’s effectiveness.

Forget flexible, get stretchable.

We’ve had curved displays for a while now, but what about stretchy ones? Samsung says it’s making progress building screens “that can be stretched in all directions like rubber bands,” and that the first applications for this material could be in building flexible health tech.

The company’s researchers recently created an OLED display that can be stretched by up to 30 percent while operating as normal. As a proof of concept, engineers integrated this display into a stretchable heart rate monitor that can be stuck onto the skin like a Band-Aid.

Continue reading “Samsung shows off stretchable OLED screen in prototype heart rate monitor” »

The Science of Aliens, Part III: Have they overcome their savage past or might they want to eat us?

Reviewing our own species’ behavior suggests a cautious approach to contact with extraterrestrials.

Continue reading “The Science of Aliens, Part 3: Have They Overcome Their Savage Past, or Might They Want to Eat Us?” »

Researchers at Okinawa Institute of Science and Technology Graduate University in Japan have recently been investigating situations in which two distinct Hamiltonians could be used to simulate the same physical phenomena. A Hamiltonian is a function or model used to describe a dynamic system, such as the motion of particles.

In a paper published in Physical Review Letters, the researchers introduced a framework that could prove useful for simulating the same physics with two distinct Hamiltonians. In addition, they provide an example of an analog simulation and show how one could build an alternative version of a digital quantum simulator.

“The idea came about when I was looking at the dynamical generation of entanglement in spin chains,” Karol Gietka, one of the researchers who carried out the study, told Phys.org. “I noticed that the behavior of entanglement as a function of time in a certain model very much resembles entanglement behavior in the paradigmatic one-axis twisting model. Initially, I thought that one could map one system onto another one, but it was not possible as the Hamiltonians of the two systems were very different, which really confused me.”

U.S. investigators have recovered millions of dollars in cryptocurrency that Colonial Pipeline paid hackers last month to end a ransomware attack on its systems.

Deputy Attorney General Lisa Monaco announced Monday afternoon that the Department of Justice “found and recaptured the majority of the ransom” paid to the DarkSide network, the group responsible for the attack.

Paul Abbate, the deputy director of the FBI, said the bureau successfully seized the ransom funds from a bitcoin wallet that DarkSide used to collect Colonial Pipeline’s payment.

Human chromosomes weigh about 20 times heavier than the DNA within them. So where’s all this extra mass coming from?

Increased account terminations would punish “innocent” users, groups tell court.