Caveat Emptor

I remember walking to lunch one day back in 2002, in early October, discussing some shootings that had been reported either that morning or the morning before. This was not a normal topic for conversation — shootings in the DC area are not uncommon — but these were sniper attacks and not taking place in the “bad” sections of town. After news of a few more attacks rolled in, there was a palpable sense of uneasiness that began to permeate the area, rising to out-and-out fear. People, including myself, changed their behavior about going out in public areas; I remember putting off getting gas until I could go to a station where I would be on the inboard side of the pumps and not present myself as a target to someone who might be hiding across the street. A few days later, an FBI employee was shot at a Home Depot parking lot a block or so away from that station — a store in a mall I frequent, and within walking distance of my abode (this has been empirically determined, repeatedly). I’ve stood in that lot, and often drive by the lot across the street where the snipers’ car must have parked.

It doesn’t much matter that the odds of getting shot were small. Fear is a raw emotion. When pitted against rational thought, it’s a good bet that fear is going to win, even if the level of fear is not rational. John Allen Muhammad and Lee Boyd Malvo terrorized the people of the greater DC area for three weeks and killed ten people. Today, Muhammed is scheduled to die, and barring an intervention by the governor, he will. I’m not generally a supporter of the death penalty; I think it’s handed out too freely and I have a hard time reconciling it with the notion of a civilized society. But today, Muhammed is scheduled to die, and I find that I have no problem with that.

My Life is a TV Teen Drama

I don’t generally watch the teen-coming-of-age drama shows, unless forced (as I was on vacation; the episode of Degrassi was a cheap ripoff of Pump Up the Volume without the benefit of a topless shot of Samantha Mathis), but I’m sure this plot has been covered somewhere: Awkward Teen asks the Beautiful Cheerleader to the prom; she has recently split with Handsome Quarterback, but doesn’t immediately say yes to AT, so he assumes she will say no and asks Safety Date, who is much more likely to want to go with him, and she says yes. Immediately thereafter, BC also says yes. Depending on the context, either tremendous angst or hilarity ensues. Possibly both, depending on the quality of the writing.

How does this apply to me? A while back I got an invitation from an old navy buddy to give the keynote talk at the Southern Atlantic Coast Section of the American Association of Physics Teachers Conference. Keynote speakers are typically either famous, to some degree, within either the physics or pop-physics communities, or are attempting to become so by promoting a book, so I am not the Beautiful Cheerleader in this scenario. I figured this was an act of desperation, but I agreed, thinking it would be fun. Lo and behold, it turns out that the other speaker can make it. (Cut to commercial)

All is not lost. I’m getting my own slot during the conference, though that will be a tad awkward — the after-dinner talk (and the public talk that some conferences have) has more leeway in not being directly related to the theme of the conference. I don’t have any particular insight into teaching to share; certainly not an hour’s worth. Same goes for a lot of themes that show up here — I don’t want to make the mistake of trying to turn a 5-minute skit into a feature movie, because it rarely works (are you listening, Saturday Night Live?) So I’ll go with my plan and talk about clocks and timekeeping, with a few cartoons thrown in, and leave the connection to teaching as an exercise for the interested viewer. I was going to do a bit about how I’m at least a little bit famous, and promote the blog, and I may leave that in.

I was also toying with the idea of going with a minimalist presentation, with very few slides in the first part of the talk. The show-and-tell part, though, really needs the “show” as much as the “tell.” Still working on that. I lose the comfort of the “1 – 1.5 minutes per slide” guideline, and since talks will follow mine, there’s pressure to finish on time.

Back to Your Regularly Scheduled Program

Gorgeous first two-thirds of the Labor Day weekend, which I spent geocaching, up to the point where my knee started complaining about all the hiking. Off-trail bushwhacking seems to be the main irritant, along with hilly trails, and i was doing a lot of that on Sunday. The knee seems to wait until I’ve maximized the distance back to the car before starting to hurt, and this time was no exception. So I’m back in front of a computer screen, digging up interesting (to me) science stuff, and sorting through my slo-mo movies, getting things ready to go.

Is Degrees Squared a Unit?

Physics Buzz: Six degrees of Paul Erdős

Some famous names have low Erdős numbers— Bill Gates has an Erdős number of 4, Steven Chu’s is 7, and Albert Einstein is 2.

If Chu’s is 7, mine is no greater than 10; I can trivially trace a path through my thesis advisor to his, to Chu.

And I’ve already mentioned that I sort of have a Bacon number of 3. Consequently, I’d like to popularize the notion of combining the two by adding them, making my Bacon-Erdős number, or Berdős number, 13 (or perhaps adding in quadrature, making my Berdős number 10.44)

Meanwhile, Chad asks Who Is the Erdos of Physics? Maybe we can make this three dimensional.

(Update: I’ve found that my Erdős number is no larger than 9, and I may be able to bring it down to 6 fairly easily)

The Vast Wasteland, Even Bigger

My TV died last night, right in the middle of The Daily Show (the 8:00 repeat). One minute Jon Stewart was there, the next, he wasn’t. I’m not lamenting the loss of the TV all that much — it was a mediocre set I got 5 years ago (I had to check my receipts; it seemed more recent, but it was June of ’04) when my last set died.

The one thing I have demanded in each TV is that it be bigger than the previous one. The 26″ set I got after I graduated college gave way to a 29″ set purchased in Canada during my years of hiding, to this recently-deceased 32″ set, a cheap transitional CRT TV I got because I could not afford an HD set; plasmas were too expensive and über-large LCDs were in their infancy. Now, I am ready to take the 40″ HD plunge. Right in time for football season.

Anniversaries Not Involving China

Today is Frank and Helga’s 100th anniversary. Frank and Helga are my great, great grandparents. A toast to them. Skol.

Also, 20 years ago last week I got out of the navy and went west (you know, the way of Horatio Alger, Davy Crockett, the Donner Party…) to go to grad school.

Posted in TMI

Time Sink

I’ve long since passed the point when celebrating a birthday is a big deal — the last party I had was for #30, where we all dressed in black to mourn the passing of my youth. Fortunately the rumors of its death were greatly exaggerated (at least the behavioral part). But I used this year’s birthday as an excuse to buy a high-speed video camera (Exilim EX-FH20). It arrived a few days ago and I’ve been playing with it a lot. Soon, perhaps, I’ll actually install the user’s manual from the CD and read it.

So expect some postings of things gratuitously shot in slow-motion, with no real point to them (in stark contrast to so many of my posts) other than some thing shot in slo-mo look pretty cool. I suspect that many of my belongings will end up broken, but that that the destruction of my property will be exceeding well-documented.

Here is an early attempt, lighting a match in a candle flame, at 1000 fps.

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Six Degrees of Something

Diandra writes about social networks at Cocktail Party Physics, in it really is a small world

This reminds me that according to the Oracle of Bacon and some simple math, I have a Bacon number of three, sort of. Back when I was in high school, the local TV station (WRGB Channel 6) must have been desperate to fill some news time, because they schlepped a few doors down the road to the high school and interviewed some of us. I was interviewed by Ernie Tetrault, the news anchor (though he got my name wrong — the name that appeared onscreen was “Tim,” and I was recognized by a teller at the bank the next day. “OMG, you’re Tim Swanson!” Fame is so fleeting*) Ernie Tetrault has Bacon number of 2, as he was in the movie Sneakers (as a news anchor) with Stephen Tobolowsky, who was in a movie with Kevin Bacon (Murder in the First).

*but this allows me to say “There some who call me … Tim”