Secure communications provider Wickr has announced that it will shutter its free encrypted messaging app, Wickr Me, next year.
Wickr was founded in 2011 and became one of the first mainstream end-to-end encrypted messaging apps, until it was acquired by Amazon’s cloud services giant Amazon Web Services in 2021.
In a post published Friday, Amazon said that Wickr Me will shut down for good on December 31, 2023. Amazon says the app will stop accepting new user registrations on December 31, 2022 before it’s discontinued completely the following year.
There have been 24 coronal mass ejections in the past week alone.
As NASA’s Orion spacecraft prepares to fly by the Moon, sky gazers can expect another little treat in the skies as a minor geomagnetic storm is expected to hit the Earth, EarthSky.
Over the past week, our Sun has seen some intense activity. Usually, when activity on the Sun increases, the chances of a geomagnetic storm on Earth also increase. Geomagnetic storms carry risks to infrastructure and communications on the planet. However, in the past week, our planet has been a bit lucky it wasn’t in the line of fire.
We will see on December 18 whether the prediction program is working or not.
The 2022 FIFA World Cup, also known as Qatar 2022, started yesterday, and its excitement has echoed worldwide. It is a matter of curiosity which nation will be the champion in this big event.
Well, good news for both science and soccer lovers because Brazil has a 25 percent probability of winning the men’s football World Cup, according to Alan Turning Institute’s prediction model that anybody can use, but the results are bleak for many other countries.
The devices are so sensitive that even a soft tap is enough to make them glow. The researchers also made the devices glow by vibrating them, drawing on their surfaces, and blowing air on them to make them bend and sway—which shows that they could potentially be used to harvest airflow to produce light. The researchers also inserted small magnets inside the devices so that they can be magnetically steered, glowing as they move and contort.
The devices can be recharged with light. The dinoflagellates are photosynthetic, meaning they use sunlight to produce food and energy. Shining light on the devices during the day gives them the juice they need to glow during the night.
The beauty of these devices, noted Cai, is their simplicity. “They are basically maintenance-free. Once we inject culture solution into the materials, that’s it. As long as they get recharged with sunlight, they can be used over and over again for at least a month. We don’t need to change out the solution or anything. Each device is its own little ecosystem—an engineered living material.”
Gnawing on his left index finger with his chipped old British teeth, temporal veins bulging and brow pensively squinched beneath the day-before-yesterday’s hair, the mathematician John Horton Conway unapologetically whiles away his hours tinkering and thinkering — which is to say he’s ruminating, although he will insist he’s doing nothing, being lazy, playing games.
Based at Princeton University, though he found fame at Cambridge (as a student and professor from 1957 to 1987), Conway, 77, claims never to have worked a day in his life. Instead, he purports to have frittered away reams and reams of time playing. Yet he is Princeton’s John von Neumann Professor in Applied and Computational Mathematics (now emeritus). He’s a fellow of the Royal Society. And he is roundly praised as a genius. “The word ‘genius’ gets misused an awful lot,” said Persi Diaconis, a mathematician at Stanford University. “John Conway is a genius. And the thing about John is he’ll think about anything.… He has a real sense of whimsy. You can’t put him in a mathematical box.”
The experiments demonstrated that the blood cells can sense when the environment outside the capillaries is low in oxygen – which occurs when neurons take up more oxygen to generate energy – and respond by rushing to deliver more. They also observed that this response if very rapid, occurring less than a second after oxygen is pulled out of the surrounding tissue.
This phenomenon is unique to the capillaries because of their size. The thin walls of the microvessels mean that the oxygen levels in adjacent brain tissue are mirrored within the capillaries, which can signal to red blood cells to spring into action.
The findings could have implications for a number of neurological disorders, including Alzheimer’s disease. It has been observed that blood flow in the brains of people with the disorder is impaired when compared to healthy brains. The difficulty in delivering the oxygen necessary for neuronal activity may help explain the cognitive difficulties that are one of the hallmarks of the disease.
Where does the mind end and the world begin? Is the mind locked inside its skull, sealed in with skin, or does it expand outward, merging with things and places and other minds that it thinks with? What if there are objects outside—a pen and paper, a phone—that serve the same function as parts of the brain, enabling it to calculate or remember?
In their famous 1998 paper “The Extended Mind,” philosophers Andy Clark and David J. Chalmers posed those questions and answered them provocatively: cognitive processes “ain’t all in the head.” The environment has an active role in driving cognition; cognition is sometimes made up of neural, bodily, and environmental processes.
From where he started in cognitive science in the early nineteen-eighties, taking an interest in A.I., professor Clark has moved quite far. “I was very much on the machine-functionalism side back in those days,” he says. “I thought that mind and intelligence were quite high-level abstract achievements where having the right low-level structures in place didn’t really matter.”
Each step he took, from symbolic A.I. to connectionism, from connectionism to embodied cognition, and now to predictive processing, took Clark farther away from the idea of cognition as a disembodied language and toward thinking of it as fundamentally shaped by the particular structure of its animal body, with its arms and its legs and its neuronal brain. He had come far enough that he had now to confront a question: If cognition was a deeply animal business, then how far could artificial intelligence go?
What is extended mind? How does the mind work? It’s not obvious. Where does the mind stop and the rest of the world begin? What is extended mind? What is embodied mind? Featuring interviews with David Chalmers, Andy Clark, and Raymond Tallis.
Closer To Truth host Robert Lawrence Kuhn takes viewers on an intriguing global journey into cutting-edge labs, magnificent libraries, hidden gardens, and revered sanctuaries in order to discover state-of-the-art ideas and make them real and relevant.
