Thursday, April 23, 2009

Three Fascinating Articles

I just read three fascinating articles on CNN.com.

The first one discusses tweeting directly using one's brain to form the letters.

The second discusses differences between men and women with respect to sexual orientation being continuous versus discrete. (There are other things in the article too, but this is what I found most interesting.) Apparently, a bunch of studies are suggesting that it seems to be much more of a continuum in women than in men (and also perhaps that it is more common for a woman to experience a change in location over time).

The third discusses the new Star Trek film. (If you haven't gotten the allusion yet, let's just say that this article is fascinating in a somewhat different manner than the other two.)

Wednesday, April 22, 2009

The Continuing Saga of Lenny Dykstra

Here is another very long (though fascinating) article about how much of a tool Lenny Dykstra is. The picture being painted certainly isn't a pretty one. For reference, here is Dykstra's wikipedia page. I haven't read it, but it has been flagged as the neutrality being in dispute.

The article to which I link also has my quotes of the day. Here is the relevant snippet:

"He thought he could keep my $500,000 and nobody would have the resources to go after him," Dada says. "But in this case, I am going after him. General surgeons are not intimidated by professional athletes.

"Like I told him, if I can cut somebody from the neck all the way down to the pubis with a scalpel, then I cannot be intimidated.

Tuesday, April 21, 2009

Great Falls Little League to pay fine on behalf of Elijah Dukes

Nationals outfielder Elijah Dukes, known for a long history of miscreant behavior, was recently fined $500 and benched for a day for being late 5 minutes for whatever time players were supposed to show up for Saturday's game. Now it turns out that he was late because of volunteer work at the Great Falls Little League, who have now announced that they are going to pay his fine for him. Their official reasoning is as follows:

"The point is, this guy gave back to our community, and now he's in a hard spot. We need to help him," said Jim Mraz, the Great Falls LL president, according to the Post. "It's not a question of whether this guy can afford the 500 bucks. We're just trying to send a message to our kids: He was here for us. Now we've got to be there for him."

You know, I'm with the Little League on this one. Now if Dukes really wants to set the right tone, he should pay the fine for himself anyway and not let the Little League do it. Nevertheless, I think the gesture by the Little League was the appropriate one, as they are sending the right message by saying that they have some accountability too. Amen!

Monday, April 20, 2009

2009 Mathematical Art Exhibition

The American Mathematical Society's website is hosting a 2009 Mathematical Art Exhibition. Take a look at it, as some of the pictures are really cool!

Friday, April 17, 2009

The Force is apparently strong in Scotland

According to BBC News, The Force is apparently strong among police officers in Strathclyde, Scotland.

As reported in the article's tagline, Eight police officers serving with Scotland's largest force listed their official religion as Jedi in voluntary diversity forms, it has emerged. (Apparently, Jedi are officially classified as atheists, but I hope I see the day when Jedi is officially considered to be its own religious designation. I also hope to see pastafarianism given such official standing.)

My favorite line in the article comes from Jane's Police Review editor Chris Herbert, who said: "The Force appears to be strong in Strathclyde Police with their Jedi police officers and staff.

I approve!

(Tip of the cap to Jaideep Singh.)

Thursday, April 16, 2009

Particle collisions for fun and proft

Mini-AIR points out the following awesome article.

Title: The expected frequency of collisions of small meteorites with cars and aircraft

Abstract: The cumulative distribution cf2>Ncf1>(cf2>dcf1>) of diameters of Earth-Crossing Asteroids (ECAs) derived by Poveda et al. (Poveda et al., 1998, submitted) is used to estimate the frequency of collisions of meteoroids with cars and with aircraft. The expected frequency of collisions of a car with a meteorite larger than 10 cm in diameter turns out to be one impact every 16 years. This frequency is consistent with the known incidence of such events (Lewis, 1996).The expected frequency of collisions of a cruising airplane with a meteorite larger than 1 cm in diameter turns out to be one impact every 30 years. Such an impactor hitting an airplane at a velocity of several hundreds of meters per second could cause a serious accident.


Comment: Wow! Now that's what I call "awesome".

Tuesday, April 14, 2009

Life (and apparently an old schoolmate) imitates Wedding Crashers

One of my old schoolmates from Hawthorne Elementary School and Beverly Hills High School has apparently become very good at crashing Hollywood parties. He is apparently considered a blagger among blaggers.

I suppose I shouldn't reveal his name here, but the name being used in the article above is close enough. I'm sure there's a wikipedia entry in his future, which would make him the 3rd (to my knowledge) member of my Beverly High graduating class to have such an entry.

(Tip of the hat to the subject of the article linked above.)

RIP Harry Kalas (1936-2009) and Mark ("The Bird") Fidrych (1954-2009)

Major League Baseball lost two more members of its family yesterday: long-time Phillies broadcaster Harry Kalas and famous one-year wonder Mark ("The Bird") Fidrych.

I listened to Kalas broadcast a few games, and he was quite good. In particular, he was very articulate, which is something that few other broadcasters can claim.

Mark Fidrych is one of those legendary figures that I often heard about as a kid, but I never got to see him pitch during his magical 1976 season. Rob Neyer and Joe Posnanski wax poetic about him. One thing that was particularly notable about The Bird was how much fun he was obviously having on the pitching mound. There have been a number of baseball players who reached amazing heights and burned out, but Fidrych seems to have stayed more prominently in the hearts and minds of many fans.

I didn't blog about it, but of course course there was also last week's car accident that claimed the life of Angel rookie pitcher Nick Adenhart. The Angels seem to be terribly unlucky when it comes to such tragedies.

Monday, April 13, 2009

Non-chaotic cycling

New Dodger 2nd baseman Orlando ("O-Dog") Hudson hit for the cycle in today's game, becoming the second LA Dodger (and the first since Wed Parker in 1970) to hit for the cycle. A player is said to "hit for the cycle" in a game when he gets a single, double, triple, and homerun (in any order). There are fewer cycles in Major League history than no hitters, though this achievement is a bit of a curiosity, as of course one would rather have a second double instead of the single that would complete a cycle, etc.

By the way, you should read this book if you want to find out about chaotic cycling.

Extreme Sheepherding

Wow, this video with LED art created by herding sheep is pretty insane. (Tip of the cap to Steve Van Hooser.)

Sunday, April 12, 2009

One of the weirdest baseball plays ever

One of the best things about baseball is that no matter how often one follows the game, one can always see something that is fundamentally new. This happened today, as today's Dodger game had one of the weirdest baseball plays I had ever seen. Unless my memory is failing me, I have never seen this in 30 years of following baseball closely.

Here is how it is described in the recap:

The Dodgers tied it at 1 on an unusual play in the second.

Los Angeles had Andre Ethier on third base and Pierre on second with one out when Wolf hit a line drive that was caught by Haren (0-2). He wheeled and threw to Lopez, who tagged Pierre for an apparent inning-ending double play.

Ethier was running on contact, and he crossed the plate before Pierre was tagged out. The Diamondbacks left the field, apparently thinking the run didn't count.

But the umpires said it did -- and by then it was too late for Arizona to appeal that Ethier had failed to tag up.

Wolf was credited with an RBI on the play, which was recorded as a 1-4 double play.

Adding to the confusion, the correct score -- Arizona 1, Los Angeles 1 -- wasn't posted on the scoreboard until the Diamondbacks came to bat in the bottom of the inning.



Note that Ethier did not tag up. Two things had to occur for this scenario to happen: (1) Lopez had to tag Juan Pierre after Ethier crossed the plate, and this happened because he went over to tag Pierre rather than tagging the 2nd base bag; and (2) Arizona was not allowed to appeal the play (namely, Ethier not having properly tagged up before crossing the play) because they had already left the field. Weird.

I'm sure ESPN writer Jayson Stark will have a lot more to say about this play, which Vin Scully (who has been broadcasting baseball games for 60 years) apparently has never seen before either.

By the way, we won.

Update (4/13/09): As Vin Scully mentioned last night and this article reminds me, the mechanism by which the Dodgers got their run is apparently known as "the fourth-out rule" (which is a new term for me). (Tip of the hat to Rob Neyer.)

Saturday, April 11, 2009

Woody Harrelson mistakes person for zombie

Let's start this report with an "awesome" quote of the day: With my daughter at the airport I was startled by a paparazzo, who I quite understandably mistook for a zombie. (It is the "quite understandably" bit that makes this line priceless.)

Basically, as described in a CNN.com article Harrelson had a small tousle with a guy with a camera. So there's not much to the story, except for the fact that Harrelson was apparently still "in character" from a movie (in which he's pursued by zombies) that he had just finished filming.

Um, can I use this excuse if I assault somebody after playing certain video games? For example: Your Honor, I mistook him for a walking turtle, so I jumped on him and then kicked him into his friends.

Friday, April 10, 2009

Pulling Out (from) All the Stops

Here is a really awesome new Mathematical Moment from the American Mathematical Society about a pair of New Yorkers (who are implied to be math students, based on the vignette) who used some graph theory to help them set a new world record (by over 2 hours) for the fastest time to visit all of the stops in New York City's subway system. The thing that I really liked about this was something with which all Techers (and, in a different sense, most scientists) are familiar: The idea of doing something really cool in a collaborative fashion while using some technical expertise as a vital component. It's not just about breaking an old record; it's about how one goes about doing it!

I approve!

RIP Dave Arneson (1947-2009)

Once again the dice are silent, as D & D co-creator Dave Arneson has died of cancer. Co-creator Gary Gygax died in March 2008.

Every time I see a news story like this, I feel like a part of my childhood has died as well.

(Tip of the hat to Vincent Kong.)

Thursday, April 09, 2009

Fermi, Pasta, Ulam, and the Birth of Experimental Mathematics

The May-June 2009 issue of the magazine American Scientist will include the article, Fermi, Pasta, Ulam and the Birth of Experimental Mathematics, which I coauthored with Norm Zabusky, Bambi Hu, and David Campbell. (I added an extra comma in the title of the blog entry, as I prefer that style. I was not allowed to use it in the article because of the magazine's official style policy.

This article is basically "FPU for Dummies", as it attempts to discuss the Fermi-Pasta-Ulam problem (and the massive amount of exciting work it has spawned; this includes multiple subdisciplines of math and physics!) without using mathematical equations. This is really hard for a subject like this...

Tuesday, April 07, 2009

Dial-a-Prayer

Arcane Gazebo recently blogged about a new automated praying service to which one can subscribe. That's what I call "awesome". As AG points out, doesn't this kind of miss the point?

Monday, April 06, 2009

2009 Baseball Predictions

The 2009 baseball season started yesterday with a 4-1 Braves victory over the Phillies. Derek Lowe turned in a stellar performance as the starter, and closer Mike Gonzalez was a little bit less stellar. Also, Brett Myers has the early lead in homeruns allowed. :)

Here are my fearless predictions for 2009:

National League:

East: Mets
Central: Cubs
West: Dodgers
Wild Card: Giants
NL winner: Mets

Of the above predictions, only my Wild Card one departs from most of the pundits. The Giants have an excellent starting staff, and I think that position players Travis Ishikawa and Pablo Sandoval are going to get really good really fast to make up for much of the weakness in the rest of the offense.

MVP: David Wright
Cy Young: Johan Santana
Rookie of the Year: I'm not sure, but I'll say Ishikawa. (Is Sandoval eligible? Doesn't he have too many plate appearances? At least one web site thinks he's a rookie.) I'll mention Cameron Maybin as well, but I'm not convinced he'll be the best rookie, even though he might well have the best career among the rookies.

Manager of the Year: Bruce Bochy (the manager of the surprise team)
Team on the rise: Giants
Team on the decline: Phillies
First manager fired: Dusty Baker

American League:

East: Yankees
Central: Indians
West: Athletics (after a fierce battle with The The Angels Angels of Anaheim)
Wild Card: Rays
AL winner: Yankees

These predictions are pretty consistent with those of the pundits, though I think most of them have the Angels over the Athletics.

MVP: Evan Longoria
Cy Young: CC Sabathia
Rookie of the Year: Matt Wieters (even though he's starting the year in the minors)

Manager of the Year: Bob Geren (the manager of the surprise team)
Team on the rise: Oakland (check out their young starting pitching); honorable mention to Texas because of their young offense (though I just can't trust them to develop any pitching)
Team on the decline: Angels
First manager fired: Ozzie Guillen

World Series: Mets over Yankees in 5 games


One final prediction: As usual, most of my predictions will turn out to be completely wrong by the end of the year.

Sunday, April 05, 2009

Play Ball!

Today is opening day for the 2009 baseball season. As has become usual practice, there will only be one game tonight and then things will really get going tomorrow. Tonight's game is between the Braves and the Phillies.

Play ball!

Wednesday, April 01, 2009

Quote of the Day

Today's quote comes from my father: "The internet is amazing."

By itself, this quote wouldn't be very interesting, but let's consider the context: First, my father is a luddite and is only just discovering the internet. Second, he doesn't go online himself. We were talking about the book "The Ascent of Man" and he wanted me to see how the author's name was spelled so that I'd be more likely to remember the guy's name. (I've heard of the book, of course, but not the author.) He had one of his office secretaries print out a page with the name---I was expecting to see the wikipedia page for the author, but it was actually the IMDB page---and that was when he uttered his comment. Maybe there is some hope after all, but there's another decade or so left to catch up... Anyway, the comment amused me greatly, given the context.

Google's 2009 April Fools joke (and other, much better, ones)

While I appreciate the subject matter of Google's April Fools joke this year, I just don't think their implementation is particularly amusing. Sorry, Google, but you've let me down this year. The idea was good, but this just didn't do it for me.

This year, I was lame and didn't do anything, so it's not like I have any foundation to back up the above comments. :)

Update: On the other hand, Expedia's $99 flights to Mars are a big win. Here is CNN's summary of April Fools jokes. (It would be really awesome if some of the ones they are reporting aren't actually jokes that anyone has pulled.) The Guardian has some fake stories on their website. The one I like best is about their impending conversion to Twitter format. Now that is awesome!

Update 2: Ah yes, and Rob Neyer in his blog has reminded me about the best. April Fools. joke. ever.

Tuesday, March 31, 2009

RIP Caltech Bookstore (Unknown--2009)

The economy has apparently claimed another victim.

I heard today from a friend that the Caltech bookstore will be defunct as of May 1st. I wonder what plans Caltech has for textbooks and ordinary supplies that it's especially convenient to buy on campus? My best guess is that simple supplies will be available at Caltech's convenience store, but I'm less clear about the textbooks. Maybe the nearby Borders will carry them?

On a more selfish note, how will people buy my book?

Anyway, the closing of Caltech's bookstore makes me a little sad.

Sunday, March 29, 2009

De-Anonymizing Social Networks

Here is interesting but scary study on how to de-anonymize social network data. It's cool, powerful, and frightening.

Note additionally that there are multiple sides to the implications of such methods: Besides pure privacy issues, there are also the privacy issues that are conjoined with the increasing number of anonymized data sets that are being analyzed by scientists like me.

Saturday, March 28, 2009

Big in Japan

Eri Yoshida, age 17 and Japan's first female professional baseball player, made her debut on Friday in the newly-formed Kansai Independent League (which is basically a minor league). A knuckleball pitcher who grew up wanting to emulate Tim Wakefield, she picked up a strikeout. As Rob Neyer points out, her small size is probably going to be her largest hurdle, but this is still awesome and I hope she gets very far.

Debriefing on the NSF 'Future of Network Science' workshop

I got back late last night from a military-run, NSF-sponsored workshop on the future of network science. The goal of the workshop was to brainstorm and try to develop a roadmap for developing 'network science' as a discipline in its own right.

Sadly, the workshop failed. ("I don't think your plan was very well thought-out... Master.") The organizers' method of doing this was ill-conceived, because they seem to think that this can be done in a physics framework and were hoping that there might be some sort of 'periodic table' of networks. I think that's too narrow-minded and tries to put a square peg in a round hole. Also, almost none of the leaders in the fields (from any of the various groups going on---in physics, CS, social science, engineering, etc.) were there. Hell, originally the workshop was going to conflict either with Sunbelt (so that none of the social scientists would be able to go) or the APS March Meeting (so that none of the physicists would be able to go). As it turns out, almost none went anyway. The organizers should have gotten around 10-15 leaders from these various fields, made sure they could come to the workshop, and then organized it around their schedule. (The 10-15 might have come from a list of, say, 30 stalwarts.) Then whoever among the rank and file (i.e., people like me) could make it then would come up to the numbers they wanted. (The size of the workshop was about right.) Also, based on the introductory comments and buzzwords, the organizers' knowledge seemed to be circa 2003.

We had lots of arguments about what a network is, and some people annoyingly insisted that it must have some sort of "flow", which would have the unfortunate side effect that things traditionally studied by bio networks people and many of the situations in the social sciences that are rather hard (that people still struggle with, as most of the research in practice deals with gross simplifications of these things) for which many of the important concepts were developed to get a handle on would a priori not be considered networks. So is the stuff for which a lot of the stuff was traditionally invented supposed to be outside of the scope of what we want to develop? That didn't seem to bother them, but I call bullshit on that one! This wasn't adopted, but some people kept bringing this up over and over again and really impeded progress. Personally, I think the suggestion of following the the Supreme Court's definition of defining pornography would have been a good way to go. :) Hence, one of my take-home messages of the workshop: "Network science is like pornography. We'll know it when we see it."

There were a few "awesome" comments during the workshop (both about the science and about other things):

"Monies will get exchanged between your government organization and our government organization."

"I can say some things that will make it sound like a network."

"If you're going to dress me up with Barabasi-type stuff, I'm going to walk out." (This was stated by a very annoying person. I was extremely tempted to pretend to believe that stuff just to see if he'd leave.)

"I know there are neurons. I know there's a lot of them." (says the medical scientist sarcastically)

"Some parts of some things have some properties of networks [I think "some of the time" then followed, though I forgot to type that here originally]." (This was particularly well-phrased, and this is pretty much exactly how I'd characterize things.)

Larry Leibovich really kicked butt as one of the voices of reason at the workshop.

"This led to an interesting and long discussion, which did not resolve anything." (This could be used to describe most of the discussions at the conference, though only some of the discussions were actually interesting.)

The random well-dressed guy was here (and actually I expected him to be here after seeing him show up as a military person in the 'How Kevin Bacon Cured Cancer' video).

Thursday, March 26, 2009

Hmmm....

Hmmm... This post makes me wonder if the person who runs the blog Sad Guys on Trading Floors is a Techer (and a Lloydie)... Then again, maybe there is some other thing that that was originally referencing and I just need to catch up on a cultural tidbit...

Remixes of Terrorism Paranoia Signs

Courtesy Justin, here are the entries in BoingBoing's challenge to mock the UK's new signs encouraging people to be paranoid about terrorism. Some of these signs are pretty funny!

(The only sign missing is one that says that long-haired, freaky people need not apply...)

Logo of the Day

So I'm staying in the FDIC building... and in the lobby, every time I use the elevator, I pass by a sign celebrating their 75th anniversary that contains the motto "confidence and stability".

I don't think any additional comments are necessary, but here is a link where you can see for yourself.

Social Networking Sites (and related phenomena) for protests and reactions to them

CNN.com has an interest article about the upcoming G-20 protest and the roll of technology like Facebook and Twitter for organizing both protesting and reactions to them.

Wednesday, March 25, 2009

What happens in Arlington stays in Arlington (Virginia edition)

I just arrived in Arlington, VA for a 'Future of Network Science' workshop, in which part of the US military has used NSF funds to fly a bunch of us in with what I believe is the purpose of getting them up to speed on the state of the art in network science. The next couple of days should be filled with a bunch of interesting big-picture discussions. I am rooming with this guy, and I am wondering if we should do some sort of dueling blogging?

Comforting incident of the day: I just got into my seat in the plane when I see a guy in an LAX uniform with a big roll of duct tape. He headed to the back of the plane and came back several minutes later with a much smaller roll of duct tape...

One other thing: I am staying in the FDIC building.

Tuesday, March 24, 2009

Quote of the Day (it's all our fault)

Today's quote comes from Representative Maxine Waters [D-CA], who uttered the following comment about the financial crisis on the February 20th edition of Real Time with Bill Maher:

"But we're not going to change that until we put some people in jail. [Applause. Cheers.] We have got to take the schemers who have conspired by hiring these mathematicians and others to come up with these exotic products that rip people off and put them in homes that they could not afford ..."

Yeah, hiring mathematicians is a conspiracy. For thoughts on similar topics, see a blog entry by Arcane Gazebo.

Tip of the hat to the AMS Math in the Media webpage.

Now I better get back to working on my paper on community detection in currency exchange networks (with a focus on data from the current credit crisis)...

Grassroots CD Recording

Jill Sobule is officially awesome.

(If the name isn't familiar, two of her best-known songs are I Kissed Girl, which is one of the best songs of the 90s, and Bitter.)

Monday, March 23, 2009

Curt Schilling retires from baseball

Curt Schilling has announced his retirement from baseball. He did it with a post on his blog. I think Schilling belongs in the Hall of Fame, but he's an interesting borderline candidate.

Sunday, March 22, 2009

Faces of Oxford

You can find my quick video interview for Faces of Oxford on this web page. When we did it, I thought it didn't come out well, but it's actually pretty decent. I said 'um' way too many times, but let me just use the usual excuse that I'm an American and don't know any better/can't be expected to use proper English/etc. (I have a similar track that starts with "I'm a mathematician.")

40 Inspirational Speeches in 2 Minutes

Here is a pretty cool YouTube video showing 40 inspirational speeches in 2 minutes. It doesn't have all of the ones I wanted to see (there's nothing about lollygagging, for instance), but it's pretty cool nonetheless.

(Tip of the hat to Rob Neyer.)

Saturday, March 21, 2009

Best. Journal. Ever.

Courtesy Mariano Beguerisse Diaz, here is the best scientific journal ever.

It's called Rejecta Mathematica, and it only publishes papers that have been rejected by another journal. (Granted, one can already post the paper on the arXiv, but this is still bloody awesome!)

I think it's worth giving some of the content of their home page here. The aims of the journal are:

"Rejecta Mathematica is a new, open access, online journal that publishes only papers that have been rejected from peer-reviewed journals (or conferences with comparable review standards) in the mathematical sciences. We are currently seeking submissions for our inaugural issue."

Here is the first part of their 'about' section:

At Rejecta Mathematica, we believe that many previously rejected papers can nonetheless have a very real value to the academic community. This value may take many forms:

"mapping the blind alleys of science": papers containing negative results can warn others against futile directions;

"reinventing the wheel": papers accidentally rederiving a known result may contain new insight or ideas;

"squaring the circle": papers discovered to contain a serious technical flaw may nevertheless contain information or ideas of interest;

"applications of cold fusion": papers based on a controversial premise may contain ideas applicable in more traditional settings;

"misunderstood genius": other papers may simply have no natural home among existing journals.



Finally, the 'General Physics' section of the March Meeting will lead to some publications! Just don't get rejected from this journal... (I wonder if the authors of the web site buried the official revelation of the joke anywhere. I still can't find it and can only thank them for putting the time to create this web site. I approve!)

Thursday, March 19, 2009

American Mathematical Society graduate student blog

I just read an American Mathematical Society (AMS) press release about an excellent idea: the AMS grad student blog.

I am not part of the intended audience, so I don't plan to add it to the blogroll. However, I wanted to highlight it because I think it's an excellent idea that will enhance communication among grad students at different institutions in a manner that nicely complements what already happens at conferences. I approve!

Sunday, March 15, 2009

What happens in the Research Triangle stays in the Research triangle

I am now in the airport at San Diego, waiting for my red-eye flight to New Jersey, which will then go to Raleigh-Durham. I will be visiting my collaborator Peter Mucha at UNC, though I will also be stopping off at Duke on Tuesday (to give a math/physics seminar) and Wednesday (to give a social networks seminar, although that's more of an informal group meeting type deal). In fact, I will also be visiting a friend's lab at NC State on Saturday morning before she drops me off at the airport. I also have plans to see one friend from grad school who is now a postdoc at Duke as well as two friends from Caltech. Additionally, my collaborator JP Onnela will be flying down on Thursday for a bit of a synchronized visit and some additional work. It's definitely going to be both a fun and productive week.

Peter Mucha and I have numerous joint projects, though the one on which we'll probably spend the most time are our series of projects on Facebook networks. The American Physical Society press conference (held at the March Meeting) about our Facebook work is tomorrow morning (I think at 11am), and there will also be an APS press release (which I assume will come out tomorrow). They highlighted our student Mandi Traud's Tuesday talk at the conference, and she will be the one doing the press conference. We also have a poster in the GSNP Gallery at the meeting, and hopefully we'll have one of the winning entries. Stay tuned for more information about the media blitz...

Sunbelt Debriefing

Today was the last day of my first Sunbelt social networks conference.

There were a ton of statisticians (though they mostly consisted of ERGMers) a lot more CS people than I was expecting (though I figured there would be a decent number there), and a metric fuck ton of sociologists of all shapes, sizes, and stripes. Of the more than 500 people present, I was one of what was perhaps literally less than a handful of mathematicians + physicists. I have said this before and I will say it again: If the people from my side of the community want to maximize their impact on problems in the social sciences, then we need to publish in their journals, go to their conferences, and participate on their SOCnet mailing list. The number of individual collaborations is much larger than it used to be---this has really improved in the last couple of years---and I am not the only math/physics person who participates in SOCnet discussions, but we can't just be inbred and only publish in our own journals. It's not good enough.

I had a good time at the conference (though I think I would have had a lot more fun if I knew more than a couple of people), and several of the talks were excellent. Barabasi had to cancel, and I was really looking forward to the fireworks that were going to follow his talk. I got along quite well with the social scientists, and I felt accepted at the conference even though my background was so different from everybody else (even though some of the talks were quite quantitative). Carter Butts gave an excellent plenary talk, and Phil Bonacich gave the other non-cancelled plenary. (You can ask me offline about that talk.) I also found out that apparently Stan Wasserman---who seems to be addicted to Facebook, by the way, given how often he was logging in during talks---is buds with Vespignani and (to a lesser extent) Barabasi, with whom he apparently just likes to have fun arguing. One of the nice things about this conference was being able to match some names to faces (it was like 1999 again, when I went to the Snowbird dynamics conference for the first time, except that I am 10 years older), though of course I recognized only a small subset of the names of the well-known people. The only one of them I met was Barry Wellman, who is one of the main people from the origins of Sunbelt, and I got along quite well with him. One thing that I already pretty much knew but got confirmed was that the math/physics networks folks from Cornell-and-friends (the Strogatz-Newman-etc. crowd) are very well-respected in this community, whereas certain other prominent members of our community are not. (As many of you know, my origin in networks is exactly the Cornell-and-friends group.)

The conference was held in the Bahia Hotel on Mission Bay, so I got a chance to walk along the beach and to feel the breeze as I used my laptop or read. That's always good, though I did find that when I was walking along the beach I felt a bit lonely not having any friends around to walk with me. (I definitely felt out of place during those times because everyone on the beach was so different from me.)

Saturday, March 14, 2009

Happy Pi Day!

Happy Pi Day! Don't forget to celebrate at 3:14 pm. I hope you already had an appropriate celebration at 3:14 am...

Friday, March 13, 2009

Highly Nonlinear Solitary Waves in Heterogeneous Periodic Granular Media

I have finally realized one of my life-long dreams: I now have a published paper that starts on page 666. (Who could ask for anything more?) And it's especially appropriate in this case, too, as the revisions for this particular paper were painful and entirely author-inflicted. Basically, the two referees (both of whom told us who they were during the process) asked only for trivial changes that took up about 0.25 % or less of the revision effort. We, on the other hand, had to deal with the fact that (among other things) the Caltech machine shop labeled "brass" as "bronze", which required us to rerun all of the numerical simulations with new (and correct!) parameter values. There were other issues as well, such as quadruple-checking the analytics and an extremely annoying factor of \sqrt{2}. So this paper really deserves to start on page 666, given all of the self-inflicted pain. It now has volume, issue, and page numbers, which means we're officially done, done, DONE with it! On to the next papers (which includes several follow-up papers to this article)!

Oh, and here are the title, authors, and abstract.

Title: Highly nonlinear solitary waves in heterogeneous periodic granular media

Authors: Mason A. Porter, Chiara Daraio, Ivan Szelengowicz, Eric B. Herbold, and P.G. Kevrekidis

Abstract: We use experiments, numerical simulations, and theoretical analysis to investigate the propagation of highly nonlinear solitary waves in periodic arrangements of dimer (two-mass) and trimer (three-mass) cell structures in one-dimensional granular lattices. To vary the composition of the fundamental periodic units in the granular chains, we utilize beads of different materials (stainless steel, brass, glass, nylon, polytetrafluoroethylene, and rubber). This selection allows us to tailor the response of the system based on the masses, Poisson ratios, and elastic moduli of the components. For example, we examine dimer configurations with two types of heavy particles, two types of light particles, and alternating light and heavy particles. Employing a model with Hertzian interactions between adjacent beads, we find good agreement between experiments and numerical simulations. We also find good agreement between these results and a theoretical analysis of the model in the long-wavelength regime that we derive for heterogeneous environments (dimer chains) and general bead interactions. Our analysis encompasses previously-studied examples as special cases and also provides key insights on the influence of heterogeneous lattices on the properties (width and propagation speed) of the nonlinear wave solutions of this system.

Monday, March 09, 2009

What happens at Sunbelt stays at Sunbelt

I am writing this entry from San Diego, where I am attending my first Sunbelt social networks conference. Based on early estimations, I seem to be one of about 5 math/physics types in a conference with over 500 social scientists. (Let the festivities begin!) All of tomorrow's talks are workshops, and I didn't pay to participate in any of them, so my plans are just to mill around, get some work done, and soak up the atmosphere.

One of the things I have told some of you before is that if people studying network science are going to influence the social scientists, we need to not just go to our venues (the March Meeting, NetSci, etc.) but also to theirs. The social scientists who know me seem to be pretty happy with the work I am doing, so I think I'm doing reasonably well in trying to establish some local connections. This has become much more common over the last couple of years, and hopefully there will continue to be more of it.

I'll try to confirm the rumor that social scientists dress much better at their conferences than mathematicians and physicists do at theirs. Stay tuned.

Sunday, March 08, 2009

Correlation Versus Causation

Courtesy Aaron Clauset, here is a a big win by the comic strip XKCD about correlation versus causation.

I approve!

What happens in the United States stays in the United States

I flew from Heathrow to LA yesterday and had a layover in the Twin Cities. As has become a tradition, I added a bit of a small incident with Customs Security to my resume. (Will somebody explain to me why so many of these people insist of being sarcastic without any provocation?) Part of it is that those people just can't handle the fact that I would choose to have a job somewhere outside of the US. (I am asked how long I've been gone, and I have to then explain that I live in the UK, which always leads to several subsequent questions.) When I say I am a professor, I am always asked what kind. (Note that yesterday I actually tried saying "mathematics professor" for that answer, and there was a brief bit of confusion when the guy didn't notice that I had said mathematics. I thought for a bit that he actually wanted me to say what kind of math I studied. I was like "Do you really want me to describe that?") This guy sarcastically asked "What do you profess?" I told him I was a math professor, though my heart screamed to give any one of a number of sarcastic responses at that point (unlike Roxette, I did not listen to my heart on that particular occasion), I just answered. His response was to ask me what the square root of 237 was, and he seemed a bit perturbed that I then paused to figure it out in my head. How else was I supposed to react? Anyway, he seemed convinced because of that and then let me through. All of this, of course, was after he told me he didn't want me puking on him (the whole motion sickness deal).

I'm on Caltech's campus right now, and I saw someone walk by with a t-shirt that said "Don't be a d^3s/dt^3" (I'm using latex notation here) on the back. (Yes, people at Caltech wear shirts like this! So do I, obviously...) I feel like I should get this, but I'm not. I was thinking of 's' as arclength, but I'm not sure. Does anybody have any ideas here? I must be missing something obvious...

Thursday, March 05, 2009

RIP Milton Rowen (age 91)

Dr. Rowen was the principal of Hawthorne School (my elementary school) during my first few years there. (I am listing him only by age because I don't know whether he was born in 1917 or 1918.) The main thing I remember about him is that we were all scared shitless of him because he would come into the cafeteria where we were having lunch, and if he saw something he didn't like he would scream at all of us. I think a couple of times he even screamed right in the face of some young kid. (Unsurprisingly, he had a military background.) He's treated rather kindly in the brief obituary in Beverly Hills Weekly, but for me this was a guy to fear, not to respect. I speak as a tree rather than as a forest, but at the time, I was quite pleased when he stepped down.

Quote of the Day

"I'm so happy I could strangle a mountain ox."

That was the response I got to an e-mail to a student accepting her to do a Ph.D. with me. My response: "I take it this is a 'yes'? ;)" Though of course I can't take the above as an official yes, though I think it's reasonable for me to expect to get that answer. I guess there is something to be said after all for delivering such news rather than it being done by departmental staff. (Granted, I have to deliver bad news more often than good news.)

Wednesday, March 04, 2009

Happy late Square Root Day!

Somehow, I needed to read this article after the fact to realize that yesterday was Square Root Day!

Please send me a reminder in 2016...

Chance Meetings

I was taking the train today for the first time in a couple of months so that I could go to Stoke-on-Trent to take a cab and head over to Keele University for a talk. The train was running late---shock!---so I ended up on a differently-configured itinerary that was leaving 30 minutes later. I was trying to find two consecutive empty seats so that I could have some space and I noticed while passing by lots of situations without such empty seats that one person seemed to look vaguely like someone I know. I didn't think much about it, though, because she has a postdoc at Brown and it was not reason it would be her. Except that it was, as she had flown in this morning for a job interview at Warwick. (Some of my readers may know who this, but I am withholding the name from a public web page for obvious reasons.) That was pretty cool! This is among my least-expected random encounters ever. (I have occasionally run into friends unexpectedly at random airports before---e.g., once in Dallas when I was making a connection---but at least they were in the right country!)

Anyway, this is my cool story for today.

Manny is staying in LA.

This was inevitable: Manny Ramirez will remain a Dodger in 2009. Thankfully, we mostly resisted the urge to bid against ourselves (which is a Scott Boras specialty).

Tuesday, March 03, 2009

Tales from the arXiv: It's Not Easy Being Green edition

Here is a new abstract from the arXiv:

arXiv:0903.0110 (*cross-listing*)
Date: Sat, 28 Feb 2009 21:20:21 GMT (1127kb,D)

Title: Kermit's What-Happens-Next-Machine Reloaded
Authors: Ursula Schroeter
Categories: physics.ed-ph physics.class-ph physics.pop-ph
Comments: tricky, but feasible. 13 pages, 11 figures, + 7 pages attachments
with FORTRAN program
\\
If Kermit's What-Happens-Next-Machine had functioned, you would not have seen
much, because it would have gone too quickly. In this article it is shown that
putting up and solving the equations of motion of a seemingly simple mechanical
apparatus presents a challenging problem. The simulation can, however, be quite
instructive and also entertaining.
\\ ( http://arxiv.org/abs/0903.0110 , 1127kb)

Saturday, February 28, 2009

The Dodger announcers on Andruw Jones

The Dodger announcers had a bit of a discussion about Andruw Jones during today's spring training game:

Charlie Steiner: "Let's see. Andruw Jones this spring is 1 for 7 with an infield single and 6 strikeouts."

Rick Monday: "He's in midseason form."


Comment: Ouch!


(The discussion then continued for a little while, but its start was just priceless.)

Friday, February 27, 2009

The only thing missing was a player to be named later

In a decision of amazing perspicuity, a women traded two children for a bird. $175 also changed hands, but the CNN article to which I link didn't indicate which direction the money went. All that was missing was a player to be named later.

Thursday, February 26, 2009

Unintended Memes

Courtesy Kohl Gill, here is a component of a conservative Christian advertising campaign that is apparently about to backfire very badly. I approve!

I love unintentional awesomeness (and "awesomeness").

Wednesday, February 25, 2009

A social network possibly worth analyzing

My collaborators and I should totally mine the data from this website and go to town on it.

If one can study the social network of superheroes in the Marvel Universe (I'm pretty sure there's a published version of this, but I can't find it at the moment) or the rap star collaboration network, then I think this is fair game. :)

Tuesday, February 24, 2009

Monday, February 23, 2009

The Drug Culture of Sports

As several sportswriters have now pointed out (I saw this recently in blog entries by Peter Gammons and Rob Neyer), the drug culture in sports isn't exactly new. Will the people crying bloody murder stop pretending that they didn't know anything? Take a look at this article, which appeared in Sports Illustrated in 1969!

Manny's economic crisis is finally over.

Apparently, Scott Boras has successfully negotiated with the government to secure $20 million for Manny Ramirez. (Tip of the hat to Rob Neyer, who linked to this story on his blog.)

Saturday, February 21, 2009

2nd Annual Oxford University SIAM Student Chapter Conference

The Oxford University SIAM (Society for Industrial and Applied Mathematics) Student Chapter had its second annual conference on February 3rd. Despite some hurdles as the date approached---that's an inevitable thing with anything like this---everything went smoothly and it worked our superbly. The one unfortunate thing was that I had forgotten the day of it when I bought my Arlo Guthrie tickets, so I needed to forgo seeing Guthrie live and I didn't know who might want the ticket, so that was a bit of a wasted 20 or so pounds. Se la vie.

You can find out more about it on the link or read about our first annual conference in 2008 in the November 2008 issue of SIAM News.

I highly recommend starting up a student chapter at your own universities. Those of us in the Oxford chapter will of course be happy to tell you the things we did wrong so that you don't repeat our mistakes. :) (We did a few things correctly too.)

Friday, February 20, 2009

Dodgers sign Orlando Hudson

It's not quite official yet, but apparently the Dodgers are about to sign second baseman Orlando Hudson to a one-year contract. It's apparently going to cost about $4 million + incentives, so we're really taking advantage of the depressed free agent market. This is quite a good acquisition for the price.

911 Call of the Day

I'm pretty sure this is fake, but it's still pretty damn funny. Here is the 911 Call of the Day. (I found this via a link on Rob Neyer's blog.)

Thursday, February 19, 2009

Caption of the Day

Today's caption occurred in this CNN article on some results that aren't particularly surprising.

The caption reads as follows: Images of women in bikinis prompted brain responses in men associated with using tools.

Also, here is the article's money sentence: New research shows that, in men, the brain areas associated with handling tools and the intention to perform actions light up when viewing images of women in bikinis.


I suppose I would be less amused if the term 'handling tools' weren't the one that was chosen by the author of the article, but I also suppose that that particular pun was too hard to keep inside.

Wednesday, February 18, 2009

Quote of the Day

Courtesy Rob Neyer's blog, Larry Bowa has provided today's quote: "Put that on the [expletive] dot com."

Of course, Bowa has quite a way to go before he catches up to Lee Elia or Tommy Lasorda. (Just don't ask Tommy to give his opinion about what I just wrote.)

Tuesday, February 17, 2009

RIP George Zaslavsky (1935-2008)

In November, the field of quantum chaos lost another of its pioneers.

In this case, it was George Zaslavsky of NYU.

I haven't found an extensive obituary online, but here is a very brief biography.

Monday, February 16, 2009

Spring (Training) is here, so it's time to start insulting Juan Pierre again

Guess who has perhaps the worst contract in the National League? That's right, it's our old friend Juan Pierre.

(Tip of the hat to Rob Neyer's blog.)

How to get high impact factors

I'm a little bit late to the game of finding out about this one, but it's pretty "awesome" and it's in my home discipline, so I'll report it now.

There is a nonlinear dynamics journal called Chaos, Solitons, and Fractals which is (shall we say) craptacular that for some reason seems to have abnormally high impact factors when compared to the other, significantly better, journals in the field. If I consider specialized journals only (so I'm throwing out anything like Nature or even PRL), there are easily half a dozen and most likely more than a dozen such journals in this area to which I would submit my stuff before I would send it to CSF. It's not even on my radar as somewhere I would bother to send it, so I always found it strange that its impact factor was so high. Everybody in the field knew it was crap, so who was citing its articles?

While of course this could have been discovered earlier (which begs the question: Why wasn't it?), it turns out that the excessive impact factor comes from a metric fuck ton of self-citations by the Editor-in-Chief, who was using this journal as a venue to publish more than 300 single-authored papers during the last 15 years. Now the Editor-in-Chief is being forced to retire. There are apparently also significant questions about his academic credentials. D'oh!

The wheels of justice may turn excruciating slowly, but they often turn nonetheless...

Finally, whoever is policing this stuff might also want to check out a few other journals that come to mind...

(Tip of the hat to Radek Erban.)


Quick Update: Here is a an entire blog that devotes itself to compiling some of the self-promotion coming from the "retiring" Editor-in-Chief. At a glance it looks pretty comical, so now I'm going to read it a bit more closely...

Mathematical Models of Bipolar Disorder

I've blogged about this paper multiple times before---including discussions of a very snarky letter-to-the-editor that my colleague and I wrote.

The paper itself has now been assigned its official journal volume, number, and page numbers. You can find the article here.


Title: Mathematical Models of Bipolar Disorder

Authors: Darryl Daugherty, Tairi Roque-Urrea, John Urrea-Roque, Jessica Troyer, Stephen Wirkus, and Mason A. Porter

Abstract: We use limit cycle oscillators to model bipolar II disorder, which is characterized by alternating hypomanic and depressive episodes and afflicts about 1% of the United States adult population. We consider two non-linear oscillator models of a single bipolar patient. In both frameworks, we begin with an untreated individual and examine the mathematical
effects and resulting biological consequences of treatment. We also briefly consider the dynamics of interacting bipolar II individuals using weakly-coupled, weakly-damped harmonic oscillators. We discuss how the proposed models can be used as a framework for refined models that incorporate additional biological data. We conclude with a discussion of possible generalizations of our work, as there are several biologically-motivated extensions that can be readily incorporated into the series of models presented here.

Sunday, February 15, 2009

Submitting abstracts versus papers to speak at conferences

There is going to be a complex systems conference at Warwick in September.

Instead of just submitting an abstract, one has to submit an entire paper in order to give a talk. The paper is up to 6 pages long if one is trying for a 20-minute talk, and it is up to 15 pages if one is trying a 40-minute talk. (One can submit only an abstract if one is trying for a poster.) This resembles CS (and presumably other engineering) conferences more than what I usually attend, where the longest required document I have seen are 2-page extended abstracts that are only marginally annoying. Although I am very interested in attending this conference, given that (1) I can present my work at equally or more prominent conferences that don't have such stringent (and, more important, time-consuming!) submission requirements and (2) conference proceedings and the like count next to nothing in mathematics, there is really no incentive at all for me to do this. (Note that if I weren't so self-motivated about writing things up anyway or if I wanted to push myself to write something up in a timetable that happened to correspond roughly to the submission deadline, then I would consider doing something like this for that reason.) It would be a waste of my time, and that's before I consider the fact that the conference may well conflict with my Examination duties at Oxford. I considered e-mailing the relevant organizer to mention this, but it's not worth it. (I have e-mailed someone involved with the conference whom I know essentially just to remark that I think it's a very bad policy if one wants to optimize the quality of a conference.) I think that part of the reason for the submission requirement is as a self-selection procedure for people who are willing to go through the major hassle, but frankly I would find it pretty surprising if lots of people aren't turned off by that whole thing. I also expect that this will lead to heavy biases in the backgrounds of the people attending in favor of people from subjects where conferences are usually like this.

If the conference doesn't conflict with Examination duties, I may show up for a bit without giving a presentation (depending, of course, on who is speaking). It's in Warwick, which is an easy train ride away.

Deviating from the Norm: Valentine's Day Edition

I'm one day late on this, but Arcane Gazebo's post reminded me of a thought I've had occasionally over the last few years and this is an appropriate time to share it:

I'm just wondering, but am I the only one who thinks it's easier to tell a Nobel Laureate that he (or she) should have shared his (or her) Nobel Prize with someone else than it is to ask someone else on a date?

Very expensive coffee

First off, I am a moron.

I somehow managed to lose 50 pounds from my wallet while getting coffee this morning. I think it fell out while I was paying, but I don't know for sure. I found out when I took out my wallet to pay for something this afternoon and noticed that the bills I needed to use weren't there. I find that pretty embarrassing, though that feeling was dominated by my feeling annoyance---especially because the same thing happened last Sunday night. I had thought that the money from my wallet was absconded when my jacket was in the cloak room of University College, but now it seems like it was instead earlier that day at the same coffee place. Of course, I don't know for sure whether the money (and a couple of frequent-customer cards and similar things) fell out while I was being stupid and was taken, but I'm really annoyed that this has now happened on consecutive weekends. Grrrr.... I need to be more careful.

Saturday, February 14, 2009

National Science Foundation report on Complex Systems

As reported on SIAM's website, the National Science Foundation has just released a report called Foundations for Complex Systems Research in
the Physical Sciences and Engineering
.

I glanced through it very briefly and provide a link to it here as a service to my fellow scientists studying complex systems.

I didn't look at the report closely enough to make too many comments other than to mention that some of the example focal problems reflect biases of the authors of the report (no surprise there) with which I don't entirely agree.

Friday the 13th is made for birthday parties

I have a history of success celebrating my birthday on Friday 13th during years in which it is feasible, and so it was yesterday.

Even though the celebration was in Oxford, we actually had 4 Lloydies (and a 5th needed to cancel at the last minute), with class years ranging from 1996 to 2008. My non-Techer friends very kindly put up the our occasional conversation devolvement, and of course it's always interesting when my present meets up with some of my past.

We didn't do anything special. We basically just hung out, but that's all I wanted anyway.

Wednesday, February 11, 2009

Tuesday, February 10, 2009

A Brief Comment about Somerville's Website Blocking

Unfortunately, Somerville College in Oxford blocks certain websites. That's really annoying as a matter of principle, but I am especially annoyed by what I just found out: That websites are blocked if they are classified as "tasteless." WTF? That's not for them to decide!

(For what it's worth, what I wanted to take a look at was a webcomic that looked like it would be interesting. It wasn't my personal website that was blocked or anything, so I'll continue to happily make my snarky remarks.)

I was planning not to blog on another steroids scandal, but...

I told myself that I wouldn't blog about the whole A-Roid thing (sorry, but I can't help snickering about the new nickname), but former Major Leaguer Doug Glanville has made an excellent point in his New York Times opinion piece, and I think that is worth bringing up. Namely, the 2003 tests---i.e., the one that A-Rod failed---were agreed legally by the players as a litmus test to try to gauge just how rampant performance-enchancing-drug abuse was in the sport. It was the massive failure (over 100 players) on those tests that led to the testing system currently in place. One of the conditions for those tests was that all results were supposed to be anonymous and without that stipulation that testing would not have taken place. So, while A-Rod gets skewered for being caught (and don't think for a second that he's the last big name who will get similarly skewered---one shouldn't be surprised to see any name!), let's also remember that basic privacy rights associated with anonymous testing are also being breached here. Why is this issue getting lost?

(Tip of the Cap: I found out about Doug Glanville's article from Rob Neyer's blog.)

Tales from the ArXiv: Superballs!

Here is a intriguing new paper that just got posted on the arXiv preprint server.

Title: Optimal Packings of Superballs

Authors: Yang Jiao, Frank Stillinger, Sal Torquato

Abstract: Dense hard-particle packings are intimately related to the structure of low-temperature phases of matter and are useful models of heterogeneous materials and granular media. Most studies of the densest packings in three dimensions have considered spherical shapes, and it is only more recently that nonspherical shapes (e.g., ellipsoids) have been investigated. Superballs (whose shapes are defined by |x1|^2p + |x2|^2p + |x3|^2p <= 1) provide a versatile family of convex particles (p >= 0.5) with both cubic- and octahedral-like shapes as well as concave particles (0 < p < 0.5) with octahedral-like shapes. In this paper, we provide analytical constructions for the densest known superball packings for all convex and concave cases. The candidate maximally dense packings are certain families of Bravais lattice packings. The maximal packing density as a function of p is nonanalytic at the sphere-point (p = 1) and increases dramatically as p moves away from unity. The packing characteristics determined by the broken rotational symmetry of superballs are similar to but richer than their two-dimensional "superdisk" counterparts, and are distinctly different from that of ellipsoid packings. Our candidate optimal superball packings provide a starting point to quantify the equilibrium phase behavior of superball systems, which should deepen our understanding of the statistical thermodynamics of nonspherical-particle systems.


Comment: But if they want to do something really cool, they'll climb to the top of the tallest building on campus and drop all of the superballs from there. (Not that I got this idea from anything I've seen before or anything...

Sunday, February 08, 2009

How Precioussssssss....

Thomas Woolley has pointed me to a link called The Kh(aX)n Machine that has generalized the Kh(aX)n construction for any letter one might want repeated in a google search.

For example, here are the results for Preciou(sX).

Here is my previous post.

Friday, February 06, 2009

More Fun with Non-Newtonian Fluids

I've posted about non-Newtonian fluids at least once before (but not for quite a while, I think).

Here is a really awesome video of a non-Newtonian fluid on a speaker cone at www.techeblog.com. (Tip of the hat to Jing Xu for pointing out this link.)

Wednesday, February 04, 2009

Herbert Simon is awesome.

Really, that's about all I want to say, although it's worth point out that he studied preferential attachment long before it was "discovered" (as some scientists might suggest) in the 1990s and he published a paper with amazingly modern views on complex systems and hierarchical organization in 1962. (Tip of the cap to Renaud Lambiotte for pointing this paper out to me.) Here is his wikipedia page.

Tuesday, February 03, 2009

Can we please just sign Adam Dunn?

Why in Hell are we bothering with Manny Ramirez's posturing?

As I wrote when we first signed him, I was very pleased when the Dodgers traded for Manny but I felt that we should let him walk away as a free agent because of course he'd eventually become a distraction. I wouldn't mind having him back for 1 or 2 years, but anything more than that would be stupid.

Additionally, we can just get Bobby Abreu or (especially) Adam Dunn for half the price (per year) that we've already offered Manny, and either one of them (especially Dunn!) would give us a good bat and relegate Juan Pierre to the bench. Manny and his agent (Scott Boras, who we have previously established is evil) are trying to get us to bid against ourselves. Boras certainly has done that successfully several times before (see: Andruw Jones), but thankfully it looks like it won't be happening this time. Let's just sign Dunn and a pitcher and save some money for mid-season pick-ups.

Monday, February 02, 2009

Is Jenny at home?

I just can't resist this story, which has an extremely cool twist in it.

First of all, I simply love the idea of somebody named Jenny giving out the number 867-5309 at bars to guys she doesn't like. However, it's pretty awesome that she eventually called the number to see who was at the other end of the line and then the two of them ended up dating for a while. I am not usually into human interest stories, but that's pretty damn cool!

This number has become a timeless source for jokes. (For example, it was used rather successfully at Pax in 2007.)

Web Form Submission Amusement

I think that sometimes I am easily amused or that my mind spends occasional moments in the gutter.

I just submitted a very sweet poster for the Nonlinear Science Gallery at the 2009 APS March Meeting, and the code letter sequence to make sure that I am a human was "poopu". [[Giggle]]

On the subject of the Nonlinear Science Gallery, there is one particularly interesting rule change that occurred either for 2008 or 2009. (I'm pretty sure it was for 2008, but I didn't submit anything last year, so I can't say for sure.) Namely, all videos are now required to be silent, which means that my 2007 entry that had The Ride playing (on infinite repeat for 3 days while the exhibitor hall was open) won't be able to be duplicated. I can, however, proudly say that the published version of that video (to which I've linked in the past), which is also available on YouTube, includes the soundtrack.

Citizens demand more snow!

Apparently, the UK is having its heaviest snowfall in 18 years.

However, I went to grad school at Cornell, and this is nothing compared to what I saw repeatedly every winter over there. It's nice to have snow in my backyard and, amazingly, I am actually have fond nostalgic feelings for Ithaca. That tends to happen when I see snow, because I'd like to be in some real snow for a couple of days every so often just so I can play around in it. I've seen some people work hard to gather up snow for snowball fights, but it still takes some effort to get that going. Our plenary speaker for tomorrow's SIAM Student Chapter Conference may have to cancel, though I hope he'll be able to make it.

Anyway, I've now witnessed the biggest UK snowfall in 18 years and the highest-magnitude UK earthquake in about 25 years, and they are both quite small with respect to my respective experiences in Ithaca and Los Angeles.

Citizens demand more snow! (Note that it has already correctly been pointed out that I'm not a citizen.)

P.S. Yes, it is true that I am itching for a snowball fight. Come get some!

Friday, January 30, 2009

Running the Numbers

Courtesy Aaron Clauset, here is a link to some very cool art by Chris Jordan. Jordan's display, called Running the Numbers: An American Self-Portrait is meant to make an emotional point by combining art with statistics of our extravagant, wasteful lifestyle. And maybe that will work, but my reaction to the pictures mostly start and end with the fact that they're really pretty. (It helps a lot that I like fractal-like things.) The constitution one is pretty damn funny, by the way.

I suppose I am supposed to have a larger emotional response, but that was never my thing (as both personality tests and, more importantly, people who know me can attest).

Note (2/8/09): I apparently forgot to put a title on this blog post when I originally wrote it. I have now corrected this.

Tax Dollars at Work

Courtesy Yalda Sharif, here is a brief (roughly 45 second) news report that is both "awesome" and awesome. (I couldn't find a non-Facebook link for this video, so if somebody has one that I can post here so that I can pass that along, that would be great.)

Thursday, January 29, 2009

Not more than two physical forces in nature

The October 2008 issue of Physics Today had an awesome article, in which physicist Lawrence Krauss discussed a hoax article that he submitted to Physical Review Letters claiming that he had found a new, overlooked force of nature. In contrast to what we typically see nowadays, the editors of PRL showed that they had a sense of humor and fired right back, responding with several fake referee reports (one for each force of nature). Both the hoax article and the referee reports were reprinted in Physics Today.

Here is the abstract for the Physics Today article:

When I was a young assistant professor at Yale University in 1986, a great deal of interest was aroused by a paper that had appeared in Physical Review Letters (E. Fischbach et al., Phys. Rev. Lett. 56, 3, 1986). The paper argued that a reanalysis of data from the famous Eötvös experiment provided evidence for a force that violated the equivalence principle—the equivalence between inertial and gravitational mass. While many people were skeptical of that result, I reacted with surprise to the notion that the paper had survived the refereeing process, which at the time had very strict self-imposed requirements of general interest, importance, and validity.

I loved the following line from the Editor's response (that contained the referee reports): "Although all advise publication (after some revision) the Editors, in their usual arbitrary and capricious manner, do not come to this conclusion."

I approve!

Wednesday, January 28, 2009

Friendships in Baseball's Minor Leagues

Courtesy Rob Neyer's blog, here's a very nice post by baseball player Randy Newsom at Dugout Central about the intensity and often fleeting nature of friendships in baseball's Minor Leagues. The movie Bull Durham has a lot to say about this as well. (For that matter, so does the Major League series of movies, though there are certain important differences between the minors and the majors here in terms of a collection of people struggling level by level without having the major stars around.)

Tuesday, January 27, 2009

Saturday, January 24, 2009

This is wrong on so many levels

Occasionally, I find interesting things with boredom-inspired google searches. Here is the latest curiosity. The page is an eBay listing for a yearbook from my sophomore year in high school.

I have a very good guess of who the seller is (given the user id). Part of me is amused, and part of me thinks it's kind of pathetic to attempt to hawk an old high school yearbook with a minimum bid of 10 dollars. (To say nothing of thinking that the phrase "Mason Porter, the famous Oxford University mathematics professor, is pictured in a sophomore portrait." will actually help sell the yearbook.)

The auction is apparently going to close within the next day (if it doesn't get recycled), so if the link doesn't show what I've described, I hope my words above will prove sufficiently amusing.

Friday, January 23, 2009

Great Britain is a very strange country.

Great Britain is a very strange place. Just consider some of the location names you can find around here. I couldn't make this stuff up.

I remember having a discussion with (Mike)^2 a year ago during my first visit home from the UK. I pass a town called Maidenhead on the train between Oxford and London, and Mike pointed out mountains (I think it was mountains) called something like Greater Cockup and Lesser Cockup.

Tip of the hat to Justin Howell for sending along this blog entry that linked to the New York Times article above. (Also, I agree with the blogger that this is the: Best. New York Times. Article. Ever.)

Comment on "Bifurcation Analysis of Parametrically Excited Bipolar Disorder Model"

A while back, I blogged about a letter to the editor a collaborator and I wrote regarding a paper that was suspiciously similar to our work. Here is the published version of that letter. Notice the snarkiness at the end. Here is my old blog entry.

By the way, I don't remember if I blogged about this previously, but the ending ended up being a happy one: Because of this whole business, the previously-unpublished article by my collaborators and me (which had been on the arXiv preprint server since 2003) has now been accepted by the very same journal that published the article that raised our ire.

OSCAR Nominations (2009)

Here are this year's OSCAR nominations.

I've seen very few of the films that have been nominated (fewer than the past couple of years), so I'm going to forgo my usual fearless predictions this time around.

Tonight I am planning to see the long-awaited (for me) third film in the Underworld series. I wonder if I'll be the only one in the theatre? :)

Thursday, January 22, 2009

Hmmm... I guess being a math professor is not so hot after all.

Or rather, according to a Crooked Timber blog post that Justin Howell passed along to me by e-mail, it's the mathematics professors who aren't all that hot.

At least we beat the chemists.

Wednesday, January 21, 2009

Jeff Kent to announce retirement from baseball

ESPN is now reporting that LA Dodger Jeff Kent will announce his retirement from baseball tomorrow. Next stop: Cooperstown.

This is the latest in a continuing installment of blog entries in which I seek to expand the baseball knowledge of network scientists everywhere (well, and everyone else too). Just wait until my paper on baseball networks comes out. (The current plan is to submit in spring.)

Tuesday, January 20, 2009

Recent Annoyances

In honor of George Carlin, here are a couple of things that piss me off:

1. Weekly seminar announcements in the form of .xls attachments with 5 pages (one for each day). This now appears to have been fixed. (I complained loudly that I wanted to receive this information in the main text of an e-mail.)

2. The following keeps happening over and over again with numerous different people: When I schedule a meeting involving N > 2 people and I cc the relevant people, I want the response to include them because their preferences/opinions are also necessary. Is 'reply to all' so hard? (I understand if somebody forgets on occasion, but why is this so widespread?)


Notice that (1) annoyed me immensely with just one occurrence, whereas (2) required multiple occurrences in quick succession to really get on my nerves.

Monday, January 19, 2009

Wikified Classmates

I now know of two of my fellow Beverly High classmates [in this case, people who I actually know] from the class of 1994 who have been wikified. (Maybe there are more, but I just found out about the second one today.)

I went to both Beverly High and Hawthorne elementary school (since 1st grade, if I remember correctly) with Dina Rae (though I know her as "Dina Franks"). I went to Beverly High with Saba Soomekh, whose sister Bahar has also been wikified. I took classes with Saba, but I don't remember whether I met Bahar (maybe I did), who has appeared in MI: III (among other films).

Then, of course, there is also Angelina (who I mever met, though my collaborator JP Onnela can tell you at least one story about her; she was one year ahead of me in school and apparently left after sophomore year) and this person (whose family lived a block away from mine and whose brother is the one who first taught me how to throw a frisbee).

So much for my sordid past. At least I can have second-order fame through the people I know.

Sunday, January 18, 2009

House construction using bananas?

Finally, there's a good use for bananas (which, as far as I'm concerned, are vile monstrosities that should be utterly wiped from the face of the planet). Namely, as this CNN weather report from Minnesota shows, they can be used to hammer nails if it gets cold enough. Nice! (The video also has a bubble demo. I'd be interested in seeing a version of that that works as well as advertised.)

This entry is dedicated to the locals who think it's actually cold in Oxford right now. I admit it's a bit nippy, but I've lived in Upstate New York, and what we're getting right now is much warmer than it is over there right now.

Saturday, January 17, 2009

Abstract MadLib

Courtesy Aaron Clauset, here is an Abstract Matlab that Jorge Cham drew for a recent installment of Ph.D. comics.

It looks eerily familiar, both with respect to stuff I've read and with respect to stuff I've written. For shits and giggles, you might want to compare this with the abstract I posted in the blog entry right before this one.

Dissipative Solitary Waves in Granular Crystals

My third paper in Physical Review Letters was officially published yesterday.

Title: Dissipative Solitary Waves in Granular Crystals

Authors: R. Carretero-Gonzalez, D. Khatri, Mason A. Porter, P. G. Kevrekidis, and C. Daraio

Abstract: We provide a quantitative characterization of dissipative effects in one-dimensional granular crystals. We use the propagation of highly nonlinear solitary waves as a diagnostic tool and develop optimization schemes that allow one to compute the relevant exponents and prefactors of the dissipative terms in the equations of motion. We thereby propose a quantitatively accurate extension of the Hertzian model that encompasses dissipative effects via a discrete Laplacian of the velocities. Experiments and computations with steel, brass, and polytetrafluoroethylene reveal a common dissipation exponent with a materialdependent prefactor.


In English, the point of this paper is as follows: The common model for the dynamics of granular crystals (otherwise known as chains of beads) is a conservative model. It's not that anybody thinks that other effects aren't relevant; rather, nobody knows how to incorporate them correctly, and it's a not a simple matter of getting something mechanistic through measurement of response curves. Trying to get a correct first-principles derivation of effects such as viscoelasticity and plasticity in order to improve the state-of-the-art models is a difficult and important endeavor. A few papers have recently appeared that insert an ad hoc dissipation term based on a linear dashpot (i.e., using a basic dx/dt type of term, as one sees in textbooks for damped harmonic oscillators), and our paper uses fitting between numerics and experiments to show that this is bounded away from being correct. (The exponent for a [dx/dt]^m type term appears to be around m = 1.75 to get the best fit to the amount of dissipation one actually sees experimentally.) Of course, our paper is not a first-principles by any stretch of the imagination. What we are now doing in this direction is to look at (1) highly plastic situations (by basically firing bullets at the chain of beads to obtain large irreversible deformations) and (2) highly viscoelastic situations in order to examine "limiting cases" to try to improve the prevailing conservative model there. We will then do the same type of fitting as in the just-published paper and ideally we'll get a sensible term that we can try to obtain with a derivation by generalizing some relevant papers that propose some functional forms that have some chance of being reasonable but haven't yet been tested in the lab for these systems.

Friday, January 16, 2009

KH(Ax)N for x = 1, ..., 100

Courtesy Lemming comes this awesome link, which shows a plot of the number of Google search results for "KH(Ax)N" (I assume the quotes aren't actually in the Google search) as a function of x. Observe the broad spike between about 35 and 50 compared to the numbers outside this range.

This seriously needs to be repeated for "PRECIOU(Sx)" for x = 1, ..., 100...

Dodgers release Andruw Jones!

The Dodgers have just officially released Andruw Jones. It's been well-known for a while they we'd be jettisoning him, but it's still great to see him officially gone. Now we just need to also get rid of Juan Pierre, and then there will be even more cause to celebrate!

By the way, I thought the move was stupid from the moment we made it, though I didn't predict it would fail as epically as it did.

Andruw: Please close the door on your way out!

Wednesday, January 14, 2009

Introducing the Pizza Patch

Check out the patch that the Mets are including on their uniform sleeves in 2009. Now that's amazingly "awesome"! (Tip of the hat to Rob Neyer's blog.)