!?

Zwichenzug

an in-between move

Cool kids read The Bellman.

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Don't read this blog!

I mean, thanks for dropping by my little corner of the blogospheric backwaters, but the blog you should be reading is The Bellman. The stuff I post there is much, much less likely to be imbued with dormitive powers.

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Zwischenzug
[German, from zwischen, intermediate + zug, move

n.
Literally an "in-between move". A move in a tactical sequence is called a zwischenzug* when it does not relate directly to the tactical motif in operation. |source|


image copyright TWIC

From this position, black played a zwischenzug: 19…d5
Adams-Kasparov
(Linares 2002, 1-0)

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about your blogger

David Rowland studies philosophy at the University of Illinois - Urbana / Champaign, where he's an active member of the Graduate Employees Organization. He used to play a lot of chess, but wasn't all that good. He has a blog. And email.

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recent

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Geeks as distributed processing power

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some folks I know

Mark Dilley
a daily dose of architecture
dailysoy
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funferal
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eripsa
January Girl
mimi jingcha
bleen
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ambivalent imbroglio
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some blogs I read

strip mining for whimsy
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School of Blog
Saheli
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Running from the Thought Police
Bionic Octopus

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some philosoblogs

E.G.
Philosoraptor
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Fake Barn Country
Freiheit und Wissen

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some labor blogs

Confined Space
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CGEU
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LaborProf
Eric Lee

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some A-list blogs

This Modern World
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some other links

Rule 33
Dictionary.com
This Week in Chess
Baseball-Reference.com
War Nerd
National Priorities Project
Bible Gateway
Internet Archive
maxdesign
A Weekly Dose of Architecture
Orsinal: Morning Sunshine
Stanford Encyclopedia of Philosophy
NegativWorldWideWebland
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Get Your War On

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some philosoblogging

Six views about reasons
Seidman on reflection and rationality
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Internalism v. Externalism
What do internalists believe anyway?
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The experimental method in philosophy
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Whorf
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What it is, what it was, and what it shall be
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Moore on torture
On the phenomenology of deliberation
Even more Deliberation Day
more Deliberation Day
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He made a porch for the throne where he might judge
Every shepherd is an abomination
Droppin' H-bombs
ad hominem

Monday, August 29, 2005

 

When the only tool you've got is an intercontinental ballistic missile, everything begins to look like an implacable enemy plotting world domination

From the Atlantic Oceanographic and Meteorological Laboratory Hurricane FAQ.
The main difficulty with using explosives to modify hurricanes is the amount of energy required. A fully developed hurricane can release heat energy at a rate of 5 to 20x1013 watts and converts less than 10% of the heat into the mechanical energy of the wind. The heat release is equivalent to a 10-megaton nuclear bomb exploding every 20 minutes. According to the 1993 World Almanac, the entire human race used energy at a rate of 1013 watts in 1990, a rate less than 20% of the power of a hurricane.

If we think about mechanical energy, the energy at humanity's disposal is closer to the storm's, but the task of focusing even half of the energy on a spot in the middle of a remote ocean would still be formidable. Brute force interference with hurricanes doesn't seem promising.

In addition, an explosive, even a nuclear explosive, produces a shock wave, or pulse of high pressure, that propagates away from the site of the explosion somewhat faster than the speed of sound. Such an event doesn't raise the barometric pressure after the shock has passed because barometric pressure in the atmosphere reflects the weight of the air above the ground. For normal atmospheric pressure, there are about ten metric tons (1000 kilograms per ton) of air bearing down on each square meter of surface. In the strongest hurricanes there are nine. To change a Category 5 hurricane into a Category 2 hurricane you would have to add about a half ton of air for each square meter inside the eye, or a total of a bit more than half a billion (500,000,000) tons for a 20 km radius eye. It's difficult to envision a practical way of moving that much air around. |link|

For a related discussion see this post.


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