So, when I say "I teach robots to learn" ... that's what I do. -the Centaur
https://arxiv.org/abs/1710.03937 PRM-RL: Long-range Robotic Navigation Tasks by Combining Reinforcement Learning and Sampling-based PlanningWe present PRM-RL, a hierarchical method for long-range navigation task completion that combines sampling-based path planning with reinforcement learning (RL) agents. The RL agents learn short-range, point-to-point navigation policies that capture robot dynamics and task constraints without knowledge of the large-scale topology, while the sampling-based planners provide an approximate map of the space of possible configurations of the robot from which collision-free trajectories feasible for the RL agents can be identified. The same RL agents are used to control the robot under the direction of the planning, enabling long-range navigation. We use the Probabilistic Roadmaps (PRMs) for the sampling-based planner. The RL agents are constructed using feature-based and deep neural net policies in continuous state and action spaces. We evaluate PRM-RL on two navigation tasks with non-trivial robot dynamics: end-to-end differential drive indoor navigation in office environments, and aerial cargo delivery in urban environments with load displacement constraints. These evaluations included both simulated environments and on-robot tests. Our results show improvement in navigation task completion over both RL agents on their own and traditional sampling-based planners. In the indoor navigation task, PRM-RL successfully completes up to 215 meters long trajectories under noisy sensor conditions, and the aerial cargo delivery completes flights over 1000 meters without violating the task constraints in an environment 63 million times larger than used in training.
Posts published in “Computing”
The art and science of mechanized thought.
DD: Do you have any one bit of advice for aspiring writers? AF: Write. Just write. Don’t worry about perfection, or getting published, or even about pleasing anyone else: just write. Write to the end of what you start, and only then worry about what to do with it. In fact, don’t even worry about finishing everything—don’t be afraid to try anything. Artists know they need to fill a sketchbook before sitting down to create a masterwork, but writers sometimes get trapped trying to polish their first inspiration into a final product. Don’t get trapped on the first hill! Whip out your notebook and write. Write morning pages. Write diary at the end of the day. Write a thousand starts to stories, and if one takes flight, run with it with all the abandon you have in you. Accept all writing, especially your own. Just write. Write.That's it. To read more, check out the interview here, or see all my Daily Dragon mentions at Dragon Con here, or check out my interviewer Nancy Northcott's site here. Onward! -the Centaur
Simply put, "artificial intelligence” is people trying to make things do things that we’d call smart if done by people.
So what’s the big deal about that?
Well, as it turns out, a lot of people get quite wound up with the definition of "artificial intelligence.” Sometimes this is because they’re invested in a prescientific notion that machines can’t be intelligent and want to define it in a way that writes the field off before it gets started, or it’s because they’re invested in an unscientific degree into their particular theory of intelligence and want to define it in a way that constrains the field to look at only the things they care about, or because they’re actually not scientific at all and want to proscribe the field to work on the practical problems of particular interest to them.
No, I’m not bitter about having to wade through a dozen bad definitions of artificial intelligence as part of a survey. Why do you ask?
Welp, that was anticlimactic! Thanks, God, for a smooth update to WordPress 4.7.3! (And thanks to the WordPress team for maintaining backwards compatibility). And hey, look - the Library has close to 1,000 posts!
Expect major site updates in the months to come, as WordPress’s Themes and Pages now enable me to do things I could only formerly do with static pages and hand-coded pages, and it will all be backed up easier thanks to WordPress’s Jetpack plugin.
The things you learn helping other people with their web sites ….
Welp, it’s time: I’ve backed up the Library of Dresan three ways to Sunday, said a prayer … and now am planning to upgrade WordPress from 3.0.1-alpha-15359 to 4.7.3. I know that’s 1.7.2 full version numbers, but it’s been too long, and there are too many new features I need, so … time to press the button.
God, please help me! Everyone else, your prayers, please.
Lots of great content …
... and this year I have pages and pages of notes!
Stay tuned …
... or check the talks out in a few weeks on the GDC Vault!
Welcome to the future, ladies and gentlemen. Here in the future, the obscure television shows of my childhood rate an entire section in the local bookstore, which combines books, games, music, movies, and even vinyl records with a coffeehouse and restaurant.
Here in the future, the heretofore unknown secrets of my discipline, artificial intelligence, are now conveniently compiled in compelling textbooks that you can peruse at your leisure over a cup of coffee.
Here in the future, genre television shows play on the monitors of my favorite bar / restaurant, and the servers and I have meaningful conversations about the impact of robotics on the future of labor.
And here in the future, Monty Python has taken over the world.
Perhaps that explains 2016.
… I had to install an ad-blocker. Why? Firefox before any ad block:
Firefox after Adblock Plus:
Yep, Firefox was TEN TIMES SLOWER when loading a page with ads, and it stayed that way because the ads kept updating. Just one page with ads brought FF to its knees, and I did the experiment several times to confirm, yes, it indeed was the ads. I don’t know what’s specifically going on here, but I strongly suspect VPAID ads and similar protocols are the culprit, as documented here:
… publisher and website owner Artem Russakovskii took to Google+ and The Hacker News to share some of his findings concerning VPAID ads. He shows how VPAID ads can degrade a user’s browser performance:
“… after several minutes of just leaving this one single ad open, I’m at 53MB downloaded and 5559 requests. By the time I finished typing this, I was at 6140 requests. A single ad did this. Without reloading the page, just leaving it open.
A single VPAID ad absolutely demolishes site performance on mobile and desktop, and we, the publishers, get the full blame from our readers. And when multiple VPAID ads end up getting served on the same page… you get the idea."
Similarly, John Gruber reports that a 500-word text article weighed in at 15MB - enough data to hold more than 10 copies of the Bible, according to the Guardian. Gruber links another post which shows that web pages can get more than 5 times faster without all the excess scripts that they load.
The sad thing is, I don’t mind ads. The very first version of my site had fake “ads” for other blogs I liked. Even the site I tested above, the estimable Questionable Content, had ads for other webcomics I liked, but experimentation showed that ads could bring Firefox to its knees. QC I always thought of as ad-lite, but guess it’s time to start contributing via Patreon.
The real problem is news sites. Sites were opening a simple story kept locking up Firefox and twice brought down my whole computer by draining the battery incredibly fast. I don’t care what you think your metrics are telling you, folks: if you pop up an overview so I can’t see your page, and start running a dozen ads that kill my computer, I will adblock you, or just stop going to your site, and many, many other people across the world are doing the same.
We need standards of excellence in content that say 2/3 of a page will be devoted to content and that ads can add no more than 50% to the bandwidth downloaded by a page. Hell, make it only 1/3 content and 100% extra bandwidth - that will be almost 100% more content than a page totally destroyed by popup ads and almost 3000% less data than one bloated by 10 copies of the Old Testament in the form of redundant ads for products I will either never buy or, worse, have already bought.