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Ask HN: So what's new in the world of A.I.?

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21–30 of 51 posts

Re: Ask HN: So what's new in the world of A.I.?

#21
In today's context, most work in AI is statistics-based. So if you are talking about conventional AI (logic-based for example), yep it would be relatively harder to find.

Lets not forget though that machine learning and data mining and their applications: natural language processing, a lot of computer vision, recommender systems, financial predictions, fraud monitoring, some types of games, and innumerable others are huge advancements made towards the same goal that AI was after, albeit with different means (statistics) than originally attacked with.

Statistical machine learning is AI. And it is bigger than ever before.

Re: Ask HN: So what's new in the world of A.I.?

#22
As others have pointed out, a lot of things that "work" stop being considered AI.

But here are a few recent advances off the top of my head:

The DARPA Grand Challenge. Robot cars that drive themselves. http://www.darpa.mil/grandchallenge/index.asp http://www.youtube.com/watch?v=RY93kr8PaC4

Google's Machine Translation system. Far from perfect, but it can usually do something reasonable between over 40 different pairs of languages. They added Latin on Thursday.

CMU researchers have developed a classifier that can look at your MRI scans and tell what you're thinking. (Still in its infancy, but still.) http://www.computerworld.com/s/article/346917/The_Grill_Tom_...

People working in my research lab are working to automatically reconstruct words from the ProtoAustronesian language using just the modern words. Our results are typically extraordinarily close to what historical linguists have done by hand.

People in a neighboring lab are working on a system that can automatically distinguish between a nuclear detonation and an earthquake as part of the Test Ban Treaty Organization. They're making good progress.

Take a look at PhotoSynth: http://photosynth.net/ which can automatically reconstruct 3D scenes from disparate photos taken from different cameras with no prior information needed to stitch them together. http://grail.cs.washington.edu/rome/

The face detection that is now standard on many cameras was one of the great problems in computer vision.

Re: Ask HN: So what's new in the world of A.I.?

#23
Numenta (http://www.numenta.com) is working on simulating how the brain (the neocortex in particular) recognizes patterns. It's an exciting recent field of research, and has little to do with neural networks, or other supposedly brain-inspired methods that don't actually bear much resemblance to neural processes.

This TED talk by co-founder Jeff Hawkins (of Palm fame) gives an overview of what they are doing.

http://www.ted.com/talks/jeff_hawkins_on_how_brain_science_w...

Re: Ask HN: So what's new in the world of A.I.?

#24
post #14

Well I think for one, the field of AI is massive and spans enormous amounts of research over 60-70 years. You wouldn't know about any breakthroughs unless you studied in the field. From my brief exposure, here are some big algorithms and some applications in roughly chronological order. Definitely not exhaustive. Those in the know...feel free to correct me: - Least squares regression (prediction- used everywhere) - F…

Gauss invented least squares. Before 1800 IIRC. Also, I had no idea svm predated em. Cool.

As for the gpus... I'm dubious. Most optimization problems I'm aware of are poorly suited for gpu style parallelism. More's the pity.

Re: Ask HN: So what's new in the world of A.I.?

#25
how bout amazon's recommendation systems? or ad placements? or google search? google what did you mean? ocr? algorithmic trading?

what field are they in if not AI? sure, the techniques are heterogeneous and there seems to be no one unifying theory but the field is a bit like that.

Re: Ask HN: So what's new in the world of A.I.?

#26
I'm flummoxed by this question. From what I see, AI is at the core of much of what's happening in Silicon Valley and in tech in general.

But then, I'm also using semantic web tools in building a search engine for financial news at http://Newsley.com. Right now we're indexing and automatically categorizing 500 financial news articles a day. And, I'm really looking forward to adding on recommender systems and use some machine learning with the scads of data we're collecting.

AI research and related topics and startups rarely make news. Is it really such a dead field? There's never any breakthroughs announced, and there's no grandiose research projects underway that I know of.

AI companies are all over the place. Any decent online ad platform is essentially a huge recommender system. Search and search quality are essentially problems that traditionally fit into a "AI" category. Have you shopped on Amazon recently? Where would they be without their recommendation system. Same with Netflix.

I just bought a $40 HD webcam that comes with software that can track points on my face in real time. It then drives a 3D puppet in sync with my facial expressions and movements. When I was studying animation 8 years ago, it took $500K worth of equipement to do motion capture. Gazehawk launched a few months ago, and are already profitable selling eye tracking tools: http://www.gazehawk.com/.

You can now buy a friggin robot to vacuum your living room for $150. The US airforce now considers commanding a wing of drones essential experience for Colonels interested in promotion. Most drone pilots in the Iraq and Afghanistan wars a pilot their aircraft from offices in Nevada. Robots are essential members of bomb and IED disposal teams. One of DailyBooth's founders was stuck in the UK because of visa problems, so last year he was attended invetsor meetings virtually by using an Anybot.

You can play virtual golf by swinging a controller in your living room if you own a Wii. The last RPG that I played was Oblivion and I was blown away by the character AI. That was years ago. I'm afraid to buy any new games because they'll suck up so much of my time.

Far from whithering away, just the opposite has happened. What used to be considered AI has now become so commonplace that we don't think twice about using it. If you don't believe me, just Google around for a while. You'll find the answer.

Re: Ask HN: So what's new in the world of A.I.?

#29
On MetaOptimize, we were discussing the most influential ideas from 95-05:

http://metaoptimize.com/qa/questions/867/most-influential-id...

And just to clarify: Most of the contributions have been in machine learning. Machines can learn a superset of AI (assuming that machines can learn AI) because there are a handful of things a machine can learn that a human can't.

Re: Ask HN: So what's new in the world of A.I.?

#30
post #17

To add to the many good responses here so far: AI is such an overloaded term with many negative connotations that it's no longer used. It's also now specialized into separate components, as researchers realize that it's not "cheating" to study e.g. vision separately from natural language processing. Even humans cheat, by having separate portions of the brain specialize in different parts of "AI". So some of the major…

I don't think it's true that it's no longer used; I certainly still consider my primary research field to be "AI", and the main journals and conferences I publish in have "AI" in the title. I do agree that some subfields have split off more, especially machine-learning, robotics, and vision, but there's plenty of stuff that still goes on under the rubric of AI. Even the more split-off fields are still very present in…

The skills and techniques required are very very different between the fields though; my PhD was in natural language processing but I don't have the first clue about machine vision, for example.

Hell, I was working on parsing biomedical text -- meaning I don't really have much of a clue about speech processing, machine translation, sentiment analysis, question answering or most of the other subfields of linguistic computing.

Of course there's plenty of room for cross-fertilization, but that's true across comp sci as a whole. Thinking of all of these things as being part of some coherent topic called AI is more of a historical legacy than a useful category.

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