Thursday, May 22, 2003

Everything I Learned in Grade School is False

I have been noting for some years now that everything my grade 3 teacher taught us was wrong: For example, I clearly remember her laughing at me when I pointed out that the bump on Africa seemed to fit into the corner of South America and telling me that, "the continents don't move, silly!" Then along came plate techtonics. Or the time she explained atoms were the smallest things and laughing when I asked what they were made out of. She had apparently never heard of quarks, though she really should have been. And etc. But I must confess that as the list of things I was taught and have always believed true but now turn out to be wrong, grows longer, it is starting to bug me.

Here the latest brain hurting discovery: A team of researchers headed by Lene Hau has found a way to slow the speed of light to a complete stop, and then restart it. Previously, Lau and her colleagues reduced the speed of light to 38 miles per hour (the speed of suburban traffic) -- Nature 397: 594 (1999).

    NASA-funded research at Harvard University, Cambridge, Mass., that literally stops light in its tracks, may someday lead to breakneck-speed computers that shelter enormous amounts of data from hackers. ..."This could open up a whole new way to use light, doing things we could only imagine before," Hau said. "Until now, many technologies have been limited by the speed at which light travels." The speed of light is approximately 186,000 miles per second (670 million miles per hour). ... Hau's team accomplished "light magic" by laser-cooling a cigar-shaped cloud of sodium atoms to one-billionth of a degree above absolute zero, the point where scientists believe no further cooling can occur. Using a powerful electromagnet, the researchers suspended the cloud in an ultra-high vacuum chamber, until it formed a frigid, swamp-like goop of atoms.When they shot a light pulse into the cloud, it bogged down, slowed dramatically, eventually stopped, and turned off. The scientists later revived the light pulse and restored its normal speed by shooting an additional laser beam into the cloud.

As a long time science fiction reader, the news release immediately brought to mind the Bob Shaw "slow glass" stories, in which windows made of slow glass show scenes that were on the other side of them years before. See, for example, Light of Other Days.

And to think my elementary school teachers did not approve of SF. In the long run, SF has proved more often right than they were!

I wasn't sure how I felt about the "frozen light" news release, though, until I read Dennis Valdron's reaction:

    Bugger this. Whatever happened to the good old days when the Universe was
    not accelerating, there were only four fundamental forces and you damned
    well knew where you stood with the speed of light. Goddamn kids, mucking
    around with universal constants like the gain on their stereo system. Mark
    my words, no good will come of this physics hooliganism!

Seems to about capture it for me!

Friday, May 16, 2003

New House

So Sunday, Mother's Day, I'm out in the Park with Tigana while Mary takes a nap. In the Park Tigana runs into Evyn, a friend from school. I end up talking to the Mom who I have not met before because Evyn's drop off and pickup times are different than Tigana's so our paths have not passed until now. We have a typical parents' conversation, and 2437 hides and seeks later, go home.

Monday, our real estate agent phones to say she has found the perfect house for us. Mary is at work, but I go with the agent to see it. (The agent says "no" when I suggest waiting until the next day -- the house has come on the market at noon today, and she needs us to see it today while it is still on the market.) Ten minutes into the tour I am saying, "How do I sell Mary on this house, because I have to have this house!" The agent drives me home just as Mary arrives. Back we go to the house as I try to constrain myself from prejudicing Mary. Five minutes into her tour, she is saying, "I have to have this house." We go home and write up an offer with the agent. Tuesday they accept the offer pending inspection. Wednesday we join the Inspector going through the house and the news is mostly good.

Half way through the tour I pass the kitchen fridge and happen to notice a piece of kid's art identitical to one of Tigana's. I do a double take, and a moment later realize that this is Evyn's house. I meet the Mom Sunday, buy her house Monday. Weird small world sometimes. (And of course can't help thinking that had the conversation turned to houses, we could have saved ourselves a sales commission, but hey, it's okday to keep things professional.)

By Thursday we have signed the final papers. We take possession August 1. We can hardly take it all in, but suddenly we're moving.

For those interested, here are pictures of the house. Patience, I've loaded way too many photos on this page.

Tuesday, May 13, 2003

Census Data

This just in (forwarded by John Herbert) Census data What I love about this item is the demonstration that a lot of the statistics we rely on are dependent on the accuracy of self-report information.

More big news brewing, but once again have to wait to see if the deal goes through before announcing it here.