Last login: 8 hours agoRaumohir
Dan is a 28 year old guy in a relationship from Chicago, Illinois, USA.
Likes 246 pages, 5 videos, 2 photos3 fans
Member since Aug 23, 2005
I'm halfway through my road to the PhD at Northwestern University just north of Chicago, where I study artificial intelligence. Before grad school, I worked for 2.5 years doing contract data mining, and I got my B.S. in computer science from Carnegie Mellon before that. I love art, literature, music, history, linguistics, and the great outdoors. I fall somewhere between Republican and Libertarian.

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If They IMd: Old Bill Clinton and New Bill Clinton - 236 - News
Liked it Apr 29, 2:27pm 6 reviews politics
http://www.236.com/news/2008/04/23/if_they_imd_old_bill_clinton_a_1_6032.php
What I'm laughing at is how the democrats are all recognizing how slimy the Clintons are now that they've turned their aim against a fellow dem. Newsflash: This isn't new behavior!
John Titor - Time Traveler
Liked it Mar 19, 10:51pm 61 reviews bizarre
http://www.johntitor.com/
Fun as long as you read it as fiction. If you don't, you're fooling yourself. You have to wonder why this is the only time traveler we've ever actually heard from, if it's so common in the future.

To be honest though, he sounds a bit like your typical radical whack-job, talking about how awful the present is and how much better the future could be if we all just lived in organic communities, held hands, and blew up the half of the world that disagreed with us. Would be funny if so many people didn't buy into it.
MITCH ALBOM: This failure should sound the alarms
Liked it Oct 25, 2007 8:25am 1 review politics
http://www.freep.com/apps/pbcs.dll/article?AID=/20071021/COL01/710210646
An important message on airport security
ABC News: Boy Scouts Rent Hiked Over Gay Ban
Disliked it Oct 18, 2007 12:22pm 6 reviews
http://abcnews.go.com/US/wireStory?id=3746335
There's gender discrimination here too. I wonder what kind of rent the girl scouts would have to pay?
the WAREHOUSE
Disliked it Sep 26, 2007 10:28am 4 reviews
http://warehouse.carlh.com/comic/comic_105.php
Needs another arrow that says "hate-filled"
http://asdfhj.com/wp-content/2004election_by_iq.png
Disliked it Aug 12, 2007 5:34pm 72 reviews
http://asdfhj.com/wp-content/2004election_by_iq.png
Sorry, this has been exposed as a hoax many times and long ago: isteve.com/Web_Exclusives_Archive-May2004.htm [isteve.com/Web_Exclusives_Archive-May2004.htm]
Worlds Largest Pothole
Liked it Apr 4, 2007 11:46am 18 reviews humor
http://www.allowe.com/Humor/Pothole.htm?view=XXX_09NNN/
I love how the guy with the shopping bag is just standing there, in EVERY photo.
Welcome to Enlightenment! Religion – the Tragedy of Mankind - Articles by Kenn…
Disliked it Feb 24, 2007 3:15am 20 reviews
http://www.jesusneverexisted.com/
This site doesn't provide any evidence for its claims, and most of its assertions make no sense.

Example: "Unlike the mythical Jesus, a real historical figure like Julius Caesar has a mass of mutually supporting evidence." Well of course, Caesar has a ton of evidence -- he had all the money and power to get his face and name printed on everything! You're talking about the first emperor of Rome, vs. a carpenter who garnered a few followers before he was crucified. Of course there will be more evidence for Caesar.

And what does it matter if some religions share some of the same principles? There is no religion on Earth in which the single god of the universe comes to earth in mortal form, with human weaknesses, and can be hurt and even killed. That's what makes christianity unique.

Oh yeah, and the priests have been paying off the scientists and historians for 200 years to keep the secret. That makes a lot of sense. Like we can keep any secret for more than a couple years at best these days! I chose to be a scientist because we look for truth, not for money. Talk about your half-baked conspiracy theories, sheesh.
Monument To Honor Dr. Martin Luther King - Charlotte News - WSOCTV.com | WSOC
Liked it Nov 13, 2006 12:26pm 1 review african-americans
http://www.wsoctv.com/news/10305739/detail.html
Short but well-conceived article on the new memorial being built in Washington D.C. to Martlin Luther King, Jr.
Article #1 of Fuzzy Logic and its Uses
Disliked it Jan 2, 2006 2:37am 40 reviews
http://www.doc.ic.ac.uk/~nd/surprise_96/journal/vol1/sbaa/article1.html
Ack, take it from me. i'm a year from my PhD in A.I. Fuzzy logic is *not* the be-all-end-all of artificial intelligence like the silly paragraph about HAL makes out.

Fuzzy logic went through a brief period when it was all the rage because people saw it as a compromise between probabilities and rules. They thought it would give the same abliity to handle uncertainty that probabilistic methods do, without all the computational overhead. As with many compromises, it turned out not the best of both worlds but a fuzzy blend that doesn't really do justice to either method.

It turns out to require pretty much the same computationality (if not more), but with less precise answers, and often without solving the real problem at hand.

To go with the example on the page, say that John is 24 and you want to decide whether he can be called young or not. Here's several approaches you can take:
1. Probabilistic. If you remember 9 out of 10 24-year-olds being called young, then you can call him young with 90% certainty.
2. Clustering. Put all the ages of people you know as dots on a line-graph. Draw circles around the closest sets of dots to group them together. Now call the first group "young", the last group "old", and groups in between variations on "kind of young".
3. Fuzzy. Make up some membership function that defines how to call a person young (it's not clear how the function is defined). Then look up where John fits on the graph you invented, and label him some degree of youngness accordingly.
4. Rule-based. Have a rule that says "Under 20 => young" and another that says "Over 30 => old". If they're somewhere in the middle, then you just don't know (or you can invent more rules to cover the gap, which then does the same thing as fuzzy logic)

Notice how '1' is the most precise answer, the answer you can do the most with. '2' is probably the most versatile, though some would say that '1' is. '4' is the simplest. The fuzzy approach, '3' tries to be simple like '4' but doesn't really cut it. (For those who understand probabilities, multiplying a couple numbers seems simpler.) It also tries to be able to give an in-between answer like '1', but since it's not precise, no one knows what to do with it. It's more sound to make decisions and easier to generalize the decision process when it's based on the result "90% likely to be called young" than based on "kind of young", which as a unique label, requires unique handling. Finally, the fuzzy approach only put off the problem of how to decide what constitutes youngness onto whatever invents the membership function that it uses.

(If you include other information like context and health to try to answer the question, then all kinds of other methods can be used too, such as decision trees, or bayesian classifiers.)

Fuzzy logic has some uses, but there's usually better methods out there. No one's sure by any means what the best method is.