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What Did You Think Would Happen? Explaining Agent Behaviour through Intended Outcomes

Neural Information Processing Systems

We present a novel form of explanation for Reinforcement Learning, based around the notion of intended outcome. These explanations describe the outcome an agent is trying to achieve by its actions. We provide a simple proof that general methods for post-hoc explanations of this nature are impossible in traditional reinforcement learning. Rather, the information needed for the explanations must be collected in conjunction with training the agent. We derive approaches designed to extract local explanations based on intention for several variants of Q-function approximation and prove consistency between the explanations and the Q-values learned. We demonstrate our method on multiple reinforcement learning problems, and provide code to help researchers introspecting their RL environments and algorithms.


Training Scale-Invariant Neural Networks on the Sphere Can Happen in Three Regimes

Neural Information Processing Systems

A fundamental property of deep learning normalization techniques, such as batch normalization, is making the pre-normalization parameters scale invariant. The intrinsic domain of such parameters is the unit sphere, and therefore their gradient optimization dynamics can be represented via spherical optimization with varying effective learning rate (ELR), which was studied previously. However, the varying ELR may obscure certain characteristics of the intrinsic loss landscape structure. In this work, we investigate the properties of training scale-invariant neural networks directly on the sphere using a fixed ELR. We discover three regimes of such training depending on the ELR value: convergence, chaotic equilibrium, and divergence. We study these regimes in detail both on a theoretical examination of a toy example and on a thorough empirical analysis of real scale-invariant deep learning models. Each regime has unique features and reflects specific properties of the intrinsic loss landscape, some of which have strong parallels with previous research on both regular and scale-invariant neural networks training. Finally, we demonstrate how the discovered regimes are reflected in conventional training of normalized networks and how they can be leveraged to achieve better optima.


millerfilm - Movies, Space, Photography and More! millerfilm: What Happens When Artificial Intelligence Has Read Everything?

#artificialintelligence

What Happens When Artificial Intelligence Has Read Everything? Article: What Happens When AI Has Read Everything? - The Atlantic (OPEN IN AN INCOGNITO WINDOW to avoid Paywall) Artificial Intelligence has grown exponentially by scanning more and more information online. So, what happens when it's read everything and runs out of material to train on? Read the article above to learn more! Come back here for all the latest Artificial Intelligence News.


This is how AI bias really happens--and why it's so hard to fix – MIT Technology Review

#artificialintelligence

The first thing computer scientists do when they create a deep-learning model is decide what they actually want it to achieve. A credit card company, for example, might want to predict a customer's creditworthiness, but "creditworthiness" is a rather nebulous concept. In order to translate it into something that can be computed, the company must decide whether it wants to, say, maximize its profit margins or maximize the number of loans that get repaid. It could then define creditworthiness within the context of that goal. The problem is that "those decisions are made for various business reasons other than fairness or discrimination," explains Solon Barocas, an assistant professor at Cornell University who specializes in fairness in machine learning. If the algorithm discovered that giving out subprime loans was an effective way to maximize profit, it would end up engaging in predatory behavior even if that wasn't the company's intention.


Few Things Might Happen In The Year of 2041.

#artificialintelligence

Hello my friend, hope you are well! It's my birthday today and I was supposed to be going for an islands hoping trip, unfortunately due to the rising Covid cases we have no choice but to postpone the plan:'(. Thank you for reading my newsletter . This post is public so feel free to share it. Anyway I was just sharing haha!


What Happens When AI Fighter Pilots Take to the Skies?

#artificialintelligence

In 2022, the pilot of an F-16 fighter jet will jink hard to the right and flick over into a roll, struggling to evade the plane behind them. Years of training and experience will suddenly become redundant. The AI algorithm controlling the chasing plane will have changed the face of war forever. AI first demonstrated the sorts of aerobatic skills needed for dogfighting back in 2008. Andrew Ng's team at Stanford University developed an AI-piloted helicopter that learned how to perform stunts simply by watching human pilots.


What Happens to Mobile Apps When AI and Machine Learning Join Forces?

#artificialintelligence

You're probably thinking of building an app that has an AI/ML component. You might even want to add an intelligent component to your already existing one. So, what exactly is possible? Artificial Intelligence and Machine Learning are popular terms nowadays. There is a trend in trying to apply the concepts of those domains to everything related to IT (building apps, recommending movies, showing ads, finding the best time to travel from one place to another, etc.).


This is how AI bias really happens--and why it's so hard to fix

MIT Technology Review

Over the past few months, we've documented how the vast majority of AI's applications today are based on the category of algorithms known as deep learning, and how deep-learning algorithms find patterns in data. We've also covered how these technologies affect people's lives: how they can perpetuate injustice in hiring, retail, and security and may already be doing so in the criminal legal system. But it's not enough just to know that this bias exists. If we want to be able to fix it, we need to understand the mechanics of how it arises in the first place. We often shorthand our explanation of AI bias by blaming it on biased training data.


Unpredictions – what won't happen with artificial intelligence (Includes interview and first-hand account)

#artificialintelligence

Artificial intelligence and machine learning are two of the key tools for the digital transformation of many businesses. From Amazon Alexa to autonomous vehicles, artificial intelligence is progressing at a very fast rate. However, there remain many technological limitations in terms of what machine intelligence technology can deliver in the short-term. The company Conversica is a leader in conversational artificial intelligence for business, and Conversica Chief Scientist Dr. Sid J. Reddy has shared with Digital Journal readers four things are unlikely to happen with artificial intelligence during 2018. Dr. Reddy refers to these as "unpredictions", turning the common approach for analysts to make predictions on its head.


clever-modular-robots-turn-legs-into-arms-on-demand?utm_source=feedburner-robotics&utm_medium=feed&utm_campaign=Feed%3A+IeeeSpectrumRobotics+%28IEEE+Spectrum%3A+Robotics%29

IEEE Spectrum Robotics Channel

Robots that can be physically reconfigured to do lots of different things are, in theory, a great way to maximize versatility while saving time and effort. Okay, yeah, that may not sound super exciting, but it means you can teach a dodecapod robot to transition into a septapod robot that can carry stuff with two arms while using a third to point a camera. Programmed in advance, that is, which is fine, except that as robots get more modular and easier to physically reconfigure, it becomes more and more useful to have a generalized system that can dynamically generate gaits (and transitions between gaits) on the fly no matter what the leg configuration of your robot happens to be. The researchers are planning on extending their method to include dynamic gaits, which means things like (we hope) running and jumping, and they're also going to generalize to other morphologies like bipeds and tripeds.