In short, PersonalBrain is a well thought out information manager with a unique and very powerful user interface. Copies can be stored internally or externally, and are fully searchable. But you can associate RTF documents with your PersonalBrain items, and quickly open those in your favorite word processor. Right now it is really only useful for jotting simple notes, not composing long text. I do wish PersonalBrain had a more robust note editor. I also like the fact that I can run PersonalBrain on my PC at work and on my MacBook at home, sharing some of the same databases via Dropbox. Essentially, the application allows you to drill down to any level of detail in your information and still see the bigger picture, and it does so far more effectively than any other piece of software I've used. To adequately describe PersonalBrain would take more space than I have here, and there is no need to, because the developer provides wonderful videos and screencasts. “Our theory can dramatically reduce the complexity of designing self-learning neuromorphic hardware to perform various types of tasks, which will be important for a next-generation artificial intelligence,” says Isomura.PersonalBrain is an excellent application, but has a few faults. As Isomura explains, “Our findings guarantee that an arbitrary neural network can be cast as an agent that obeys the free-energy principle, providing a universal characterization for the brain.” These rules, along with the researchers’ new reverse engineering technique, can be used to study neural networks for decision-making in people with thought disorders such as schizophrenia and predict the aspects of their neural networks that have been altered.Īnother practical use for these universal mathematical rules could be in the field of artificial intelligence, especially those that designers hope will be able to efficiently learn, predict, plan, and make decisions. These findings point toward a set of universal mathematical rules that describe how neural networks self-optimize. In this case, the neural networks can be viewed as being governed by the free-energy principle, which allowed it to learn the correct route through a maze through trial and error in a statistically optimal manner. The neural networks self-organized by changing the strength of their neural connections and associating past decisions with future outcomes. Once they established that neural networks theoretically follow the free-energy principle, they tested the theory using simulations. “Importantly, they do so the same way that they would when following the free-energy principle.” “We were able to demonstrate that standard neural networks, which feature delayed modulation of Hebbian plasticity, perform planning and adaptive behavioral control by taking their previous ‘decisions’ into account,” says first author and Unit Leader Takuya Isomura. The researchers compared the free-energy principle with well-established rules that control how the strength of neural connections within a network can be altered by changes in sensory input. In this system, an agent is continually updated by new incoming sensory data, as well its own past outputs, or decisions. The journal includes: a) original articles b) invited and. The free-energy principle follows a concept called Bayesian inference, which is the key. Brain Stimulation is the premier journal for publishing research in the field of neuromodulation. In the brain, neural networks are optimized to allow efficient control of behavior and transmission of information, while still maintaining the ability to adapt and reconfigure to changing environments.Īs with the simple cost/benefit calculation that can predict the speed that a cat will begin to gallop, researchers at RIKEN CBS are trying to discover the basic mathematical principles that underly how neural networks self-optimize. Far from being random, the switch occurs precisely at the speed when the amount of energy it takes to gallop becomes less that it takes to run. A behavioral example can be seen in the transition that cats make from running to galloping. This finding will be useful for analyzing impaired brain function in thought disorders as well as for generating optimized neural networks for artificial intelligences.īiological optimization is a natural process that makes our bodies and behavior as efficient as possible. Then, as proof-of-concept, it shows how an energy minimizing neural network can solve mazes. Published in the scientific journal Communications Biology, the study first shows how the free-energy principle is the basis for any neural network that minimizes energy cost. The RIKEN Center for Brain Science (CBS) in Japan, along with colleagues, has shown that the free-energy principle can explain how neural networks are optimized for efficiency. The free-energy principle explains the brain
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