Search found 9 matches

by Pers
Fri Oct 09, 2009 9:13 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0647: "Scary"
Replies: 271
Views: 57964

Re: "Scary" Discussion

What an apropos comic.

I received a flyer yesterday for my seven-year-old's school play, Legend of Sleepy Hollow.
by Pers
Wed Sep 30, 2009 5:34 pm UTC
Forum: Science
Topic: Fusion Reactors
Replies: 29
Views: 2837

Re: Fusion Reactors

In traditional laser-driven inertial fusion, lasers compress a DT target to 100 times the density of lead and 100 million Kelvin temperatures to ignite deuterium-tritium fuel in an ignition capsule. In the point design for NIF ignition, this is done by propagating four shock waves into the center of...
by Pers
Wed Sep 30, 2009 1:26 pm UTC
Forum: Science
Topic: Fusion Reactors
Replies: 29
Views: 2837

Re: Fusion Reactors

Though wouldn't you agree that there does seem to be greater worldwide interest in tokamak systems being viewed as the most promising path to fusion power? If there was widespread consensus that ICF was more promising, we'd probably be building a collaborative international ICF device. I would disa...
by Pers
Tue Sep 29, 2009 6:23 pm UTC
Forum: Science
Topic: Fusion Reactors
Replies: 29
Views: 2837

Re: Fusion Reactors

NIF is as much a thermonuclear "reactor" as ITER is. That is to say, not at all. Rather, both are ambitious proofs of concept on the path to fusion power and rank among humanity's greatest technological and scientific triumphs to date. The Apollo missions were a cake walk compared with las...
by Pers
Sun Sep 27, 2009 6:34 am UTC
Forum: Science
Topic: Fusion Reactors
Replies: 29
Views: 2837

Re: Fusion Reactors

With the sources you mention, the things being used for energy production are heat (used to boil water and drive a generator), kinetic energy (which also drives a generator), or a skipping altogether of the generator and creating a voltage. Even fission reactors release most of the nuclear binding e...
by Pers
Sun Sep 27, 2009 3:48 am UTC
Forum: Science
Topic: Fusion Reactors
Replies: 29
Views: 2837

Re: Fusion Reactors

Touché (though not terribly relevant to a discussion of fusion reactors).

Better may have been if you'd mentioned the sun and gravitational confinement.
by Pers
Sat Sep 26, 2009 2:06 pm UTC
Forum: Science
Topic: Fusion Reactors
Replies: 29
Views: 2837

Re: Fusion Reactors

It would still get pretty hot from radiative energy transfer though - don't know how exactly they manage with that. A shiny, shiny surface--or a very white color--keeps the radiative transfer down. High energy EM radiation is reflected or scattered, instead of being absorbed. Reflective surfaces ar...
by Pers
Thu Sep 17, 2009 9:43 pm UTC
Forum: Mathematics
Topic: Show us your articles! Or what's your Erdos number?
Replies: 187
Views: 276863

Re: Show us your articles! Or what's your Erdos number?

Mine's 5, with nine distinct PTP (Paths To Paul) that I know of.

(But them I'm a physicist with only 60 pubs to my name, so I didn't expect to be close).
by Pers
Mon Sep 14, 2009 1:28 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0635: "Locke and Demosthenes"
Replies: 204
Views: 97572

Re: "Locke and Demosthenes" Discussion

This is slightly off-topic, but some may find it amusing: a week or so before this comic was posted, I published this short story, which mocks the same thing.

Now I'm plagued on another board by conspiracy theories that I'm Randall Munroe in disguise.

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