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Wayne Radinsky
18,291 followers -
Software Design Engineer
Software Design Engineer

18,291 followers
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Wayne Radinsky's posts

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Google has partnered with Tri Alpha Energy, a startup funded by Paul Allen, to apply a hybrid of machine learning and human intelligence to the problem of nuclear fusion.

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Neural networks that imagine the consequences of their actions before they take them. "The agents we introduce benefit from an 'imagination encoder' -- a neural network which learns to extract any information useful for the agent's future decisions, but ignore that which is not relevant." They "learn to interpret their internal simulations", "use their imagination efficiently" which means adapting the number of imagined trajectories to suit the problem and extracting additional information from imagined trajectories that may contain useful clues even if they do not necessarily result in high reward, and "can learn different strategies to construct plans" which means choosing between continuing a current imagined trajectory or restarting from scratch, and using different imagination models.

"We tested our proposed architectures on multiple tasks, including the puzzle game Sokoban and a spaceship navigation game."

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Stem cells in the brain's hypothalamus govern how fast aging occurs in the body. Well, in mice. "In a 2013 Nature paper, Albert Einstein College of Medicine researchers made the surprising finding that the hypothalamus also regulates aging throughout the body. Now, the scientists have pinpointed the cells in the hypothalamus that control aging: a tiny population of adult neural stem cells, which were known to be responsible for forming new brain neurons."

"By replenishing these stem cells or the molecules they produce, it's possible to slow and even reverse various aspects of aging throughout the body."

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Is China serious about banning all VPNs by next February? The guys at ADVChina discuss the issue. They say on the one hand, this is nothing new -- China has been playing this cat-and-mouse game with VPNs since the beginning of the Great Firewall of China, or the Golden Shield as the Chinese government calls it. But, on the other hand, if the Chinese government is really serious this time and really succeeds at completely blocking all the VPNs, there'll be an exodus of foreigners from China.

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"The task of comparing brains and clusters of galaxies is a difficult one. For one thing it requires dealing with data obtained in drastically different ways: telescopes and numerical simulations on the one hand, electron microscopy, immunohistochemistry, and functional magnetic resonance on the other."

"It also requires us to consider enormously different scales: The entirety of the cosmic web -- the large-scale structure traced out by all of the universe's galaxies -- extends over at least a few tens of billions of light-years. This is 27 orders of magnitude larger than the human brain."

"Many natural phenomena are not equally complex at all scales."

'It is truly a remarkable fact that the cosmic web is more similar to the human brain than it is to the interior of a galaxy; or that the neuronal network is more similar to the cosmic web than it is to the interior of a neuronal body."

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Microsoft made an AI tool to automate finding and fixing the bugs exposed by fuzz testing. Fuzz testing is when you throw random data into programs.

"Security Risk Detection (SRD) augments the work developers already do by using AI to automate the same reasoning process that people use to find bugs, and scale it through the cloud. It's for teams that don't have security talent, and those that may not have security talent to scale out. While they may not need security expertise to use SRD, developers will need some security know-how to address the bugs it finds."

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"Autonomous cars often proudly claim to be fitted with a long list of sensors -- cameras, ultrasound, radar, lidar, you name it. But if you've ever wondered why so many sensors are required, look no further than this picture."

"You're looking at what's known in the autonomous-car industry as an 'edge case' -- a situation where a vehicle might have behaved unpredictably because its software processed an unusual scenario differently from the way a human would."

"Lidar cannot sense glass, radar senses mainly metal, and the camera can be fooled by images."

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"The proteins of the human papilloma viruses, for instance, were arranged in five-fold pentagonal structures, rather than hexagonal ones. Unlike hexagons, however, regular pentagons cannot be built from equilateral triangles, nor can they tessellate a plane: When slid next to each other to tile a surface, gaps and overlaps inevitably arise."

"So Reidun Twarock, a mathematician at the University of York in England, turned to Penrose tilings, a mathematical technique developed in the 1970s to tile a plane with five-fold symmetry by fitting together four-sided figures called kites and darts. The patterns generated by Penrose tilings do not repeat periodically, making it possible to piece together its two component shapes without leaving any gaps. Twarock applied this concept by importing symmetry from a higher-dimensional space -- in this case, from a lattice in six dimensions -- into a three-dimensional subspace. This projection does not retain the periodicity of the lattice, but it does produce long-range order, like a Penrose tiling. It also encompasses the surface lattices used by Caspar and Klug. Twarock's tilings therefore applied to a wider range of viruses, including the polyomaviruses and papillomaviruses that had evaded Caspar and Klug's classification."

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"Humans first arrived in Australia 65,000 years ago." "The finding pushes back the timing of when people first came to the continent by about 5,000 to 18,000 years. It also suggests that humans coexisted with colossal Australian animals like giant wombats and wallabies long before the megafauna went extinct."

"We were gobsmacked by the richness of material that we were finding at the site: fireplaces intact, a ring of grind stones around it, and there were human burials in their graves."

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"People can understand the goal of a task just from watching someone else do it, or simply by being told what the goal is."

"Our is aim is to enable a robot to understand a task, such as opening a door, from seeing only a small number of unlabeled human demonstrations. By analyzing these demonstrations, the robot must understand what is the semantically salient event that constitutes task success, and then use reinforcement learning to perform it."

"After learning a reward function from observation only, we use it to guide a robot to learn a door opening task, using only the images to evaluate the reward function. With the help of an initial kinesthetic demonstration that succeeds about 10% of the time, the robot learns to improve to 100% accuracy using the learned reward function."

"In a pose imitation task for example, different dimensions of the representation may encode for different joints of a human or robotic body. Rather than defining by hand a mapping between human and robot joints (which is ambiguous in the first place because of physiological differences), we let the robot learn to imitate in an end-to-end fashion. When our model is simultaneously trained on human and robot observations, it naturally discovers the correspondence between the two, even though no correspondence is provided. We thus obtain a robot that can imitate human poses without having ever been given a correspondence between humans and robots."
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