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Nov 30, 2021
Jun Tani: The self-Organizing Functional Hierarchy: a neuro-robotics study — Part 1
Posted by Dan Breeden in categories: neuroscience, robotics/AI
The current talk addresses a crucial problem on how compositionality can be naturally developed in cognitive agents by having iterative sensory-motor interactions with the environment.
The talk highlights a dynamic neural network model, so-called the multiple timescales recurrent neural network (MTRNN) model, which has been applied to a set of experiments on developmental learning of compositional actions performed by a humanoid robot made by Sony. The experimental results showed that a set of reusable behavior primitives were developed in the lower level network that is characterized by its fast timescale dynamics while sequential combinations of these primitives were learned in the higher level, which is characterized by its slow timescale dynamics.
Nov 30, 2021
Dynamic Causal Modelling — Karl Friston
Posted by Dan Breeden in category: neuroscience
Serious Science — http://serious-science.org.
Neuroscientist Karl Friston on functional specialization of different brain areas, brain hierarchy, and the connectome.
Continue reading “Dynamic Causal Modelling — Karl Friston” »
Nov 30, 2021
Why Jeff Bezos’ vision of space is “more expansive” than Elon Musk’s
Posted by Nicholi Avery in categories: Elon Musk, space travel
The two billionaires are locked in a race to send humans to space, with Musk’s SpaceX far in front of Bezos’ Blue Origin venture. But the two differ on what to do when humanity arrives in space: Musk wants to establish a self-sustaining city on Mars, while Bezos would rather see humans orbiting Earth in giant space stations.
Musk’s vision receives a lot of publicity, but space consultant Rand Simberg tells Inverse that Bezos’ goal is the “more expansive.”
“Elon is what [science fiction writer Isaac] Asimov would have called a planetary chauvinist,” he says. “He thinks people need to be on planets. He wants to be a multi-planet species. That’s nice, I guess. But Bezos actually has a more expansive vision.”
Nov 30, 2021
Curiosity captures a stunning view of Mars’ mountainous terrain
Posted by Atanas Atanasov in category: alien life
The Curiosity rover captured a scenic view of Mars’ mountains during its ongoing mission on the Red Planet to find signs of ancient alien life.
Nov 30, 2021
Amazon’s cloud unit launches new chips to take on Intel, Nvidia
Posted by Shubham Ghosh Roy in category: computing
Nov 30 (Reuters) — Amazon.com Inc’s (AMZN.O) cloud computing unit on Tuesday introduced two new custom computing chips aimed at helping its customers beat the cost of using chips from Intel Corp (INTC.O) and Nvidia Corp (NVDA.O).
With $45.37 billion in sales in 2020, Amazon Web Services (AWS) is the world’s biggest cloud computing provider and one of the biggest buyers of data center chips, whose computing power AWS rents out to its customers. Ever since buying a startup called Annapurna Labs in 2015, AWS has worked to develop its own custom chips.
On Tuesday, the company released the third generation of its Graviton chip that is designed to compete with central processors from Intel and Advanced Micro Devices (AMD.O). The Graviton3 is 25% faster than its predecessor, and Dave Brown, vice president of Elastic Compute Cloud at Amazon, told Reuters that the company expects it to provide a better performance per dollar than Intel’s chips.
Nov 30, 2021
Controlling Brain Circuits, Behavior, and Emotion Using Light
Posted by Jose Ruben Rodriguez Fuentes in category: neuroscience
Summary: A newly developed system dubbed Opto-vTrap can temporarily trap vesicles from being released from brain cells.
Source: Institute for Basic Science.
Controlling signal transmission and reception within the brain circuits is necessary for neuroscientists to achieve a better understanding of the brain’s functions. Communication among neuron and glial cells is mediated by various neurotransmitters being released from the vesicles through exocytosis. Thus, regulating vesicular exocytosis can be a possible strategy to control and understand brain circuits.
Nov 30, 2021
Virtual land within metaverse sells for record $2.43 million
Posted by Muhammad Furqan in category: space
The Metaverse Group describes itself as “the world’s first virtual real estate company”.
Decentraland space will be used to host virtual fashion shows for avatars.
Nov 30, 2021
Are You Guilty Of These 3 Cognitive Biases In Decision Making?
Posted by Gemechu Taye in categories: evolution, information science, neuroscience
Our hunter-gatherer ancestors are huddled around a campfire when they suddenly hear the nearby bushes rustling. They have two options: investigate if the movement was caused by small prey such as a rabbit, or flee, assuming there was a predator such as a saber-tooth tiger. The former could lead to a nutritious meal, while the latter could ensure survival. What call do you think our ancestors would have made?
Evolution ensured the survival of those who fled the scene on the margin of safety rather than those who made the best decision by analyzing all possible scenarios. For thousands of years, humans have made snap decisions in fight-or-flight situations. In many ways, the human race learned to survive by jumping to conclusions.
Continue reading “Are You Guilty Of These 3 Cognitive Biases In Decision Making?” »
Nov 30, 2021
NASA Postpones Astronauts’ Spacewalk Due To Risk From Debris
Posted by Gemechu Taye in categories: military, satellites
It feels a bit like a headline ripped from the plotline of the 2013 flick “Gravity” — NASA astronauts suddenly find themselves having to worry more about the threat of space debris whipping around Earth at over 17,000 miles per hour.
Just two weeks after the current crew of the International Space Station had to take emergency shelter in the Russian Soyuz and SpaceX Crew Dragon capsules that are docked to the ISS, NASA has now postponed a planned spacewalk because of the threat.
One source of the increased threat is Russia’s recent anti-satellite missile test that created hundreds, if not thousands, of new pieces of debris in low-earth orbit. On November 15 it was reported that Russia blasted one of its own defunct satellites to smithereens, a move that drew global condemnation.
