My “Applications in Business Programming” class had our first meeting last night.
This
Note that it is:
Given that I paid $180 for the textbook for my previous class with this professor, I think this is worthy of praise. Well done, sir!
I haven’t done any explosives blogging in a while, and a conversation over the weekend reminded me that I had two links pending:
Derek Lowe’s latest “Things I Won’t Work With”: chlorine azide.
A while back, Joe Huffman (of Boomershoot fame) exchanged emails with a gentleman named Lawrence Johnston. Dr. Johnston worked at Los Alamos during the war: specifically, he worked on designing the detonation mechanism for the implosion bombs. Mr. Huffman has a link to a presentation Dr. Johnston gave in 2006, on his experiences at Los Alamos.
In particular, the material about designing the detonators is fascinating stuff. The problem with the implosion device is that, in order to get it to work, they had to set off 32 separate explosions (in explosive lenses arranged around the core of the bomb) and all of those explosions had to take place within 1/10th of a microsecond. Using conventional detonation mechanisms gives you a timing of several tens of microseconds, which won’t work when you’re trying to get a bunch of explosive fronts to converge into one spherical wave. So how do you solve this problem? Dr. Johnston developed the exploding bridgewire detonator for this purpose, and there’s some great stuff in his presentation about things like the D’autriche test for detonator timing, determining the blast yield of the early bombs, and what daily life at Los Alamos at the time was like. I commend Dr. Johnston’s presentation to your attention, and regret not blogging it sooner.
I thought about including this in the previous round of random notes, but on second thought it deserves a post by itself. Here are two epic tales from bloggers that I admire (though I have not met either of them):
Ambulance Driver and his buddy, Too Old to Work, Too Young to Retire, bring a woman back from the dead while on vacation.
Ken over at Popehat talks about a day in the glamorous life of a defense lawyer.
Some things worth noting in the NYT on this fine day:
Michael Ruhlman reviews Modernist Cuisine: The Art and Science of Cooking
Spider-Man, Spider-Man, does whatever a spider
Never mind.
You may ask yourself, “Why would someone pay $20,000 for a replica of an Eric Clapton Stratocaster, ‘complete with every single nick and scratch, including the wear pattern from Mr. Clapton’s belt buckle and the burn mark from his cigarettes’?” You would probably answer that question, “Because they’re a moron.” The NYT would like for you to know that evolutionary psychology suggests you’re wrong:
Yesterday was election day in Bell, California. How did things go?
Noted: Austin now has a Peruvian restaurant. (Okay, technically, Pflugerville.) Yes, I’m thinking Saturday Dining Conspiracy. No, not right away; we generally give places three months after opening before reviewing them.