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Archive for June, 2008
Note: While I am keeping this blog for the occasional longer piece, I have moved to Google+ (link to my Google+ profile) for the more casual use.

Surfing

June 20th, 2008 andrea Comments off

Today is the first day of summer, and it has been 39° Celsius. Summer is supposed to be the most productive period of the year, but I don’t guarantee any productivity over 40°.

Caltech commencement

Last week commencement took place, the cheerful black-robe ceremony, in which all graduates (Bachelor’s, Master’s and Ph.D.) are called on the stage one by one. It’s a neverending liturgy patiently endured by the families waiting hours for their child’s moment to come.

By the way, after a previous gaffe, I can now distinguish between the Texan and Cuban flag (can you?):

Texas shirt

Caltech is quiet now. I presume most undergrads have left for the summer, or maybe they just hide deeper in their caves. Some spend their Californian summer surfing. Except that here “SURF” means Summer Undergraduate Research Fellowships. Here is the class of 2008 that will work on Alice, the autonomous car veteran of the Darpa Urban Challenge.

SURF group

The perspicacious reader might have understood that I bought a new camera, a Sony Alpha 300, which currently is probably better than what I can handle. Coincidently, I discovered that one of next year’s incoming grad students in CDS is a professional photographer. Before starting in the Fall, he’s traveling around the country: I wrote him to enjoy this time, because during the next summers the only animals he will take pictures of are the many squirrels in the campus.

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Replaying evolution

June 11th, 2008 andrea 1 comment

This is the most interesting paper I read in a while:

“Historical contingency and the evolution of a key innovation in an experimental population of Escherichia coli”

doi:10.1073/pnas.0803151105

The Long Term Evolution Experiment has been growing 12 colonies of E. Coli in controlled conditions since 1988. At one point, after 30000 generations, one of the colonies evolved the ability to synthetize citrate in addition to glucose. Because the researchers had frozen samples from previous generations, they could restart the evolution process from an earlier point and see it happen again.

And no, I’m not doing biology here at Caltech. I would never wait 20 years for my experiments to finish!

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