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Comment Re:Trans continental railway (Score 1) 258

This may be true for the Thruway, but is not the case for NYC. Revenue generated from tolls on NYC bridges (at least the ones owned by the Triborough Bridge and Tunnel Authority, a division of the MTA) is used to fund a significant portion of the operating costs of public transit. Without tolls from, for example, the Verrazano Narrows Bridge, the subway fare would be much higher than $2.50.

Comment Einstein, Turing, and Godel (Score 1) 278

I highly recommend both A Madman Dreams of Turing Machines by Janna Levin, and Einstein's Dreams by Alan Lightman.

Madman is about Turing and Godel's lives (and the parallels between them) during the time of their most profound work, with a decent discussion of the philosophy and logic behind their discoveries. Dreams is a fun romp through Einstein's imagination as he toys with various theories of time while daydreaming at his job in the patent office.

Both are excellent reads and a great deal of fun.
Earth

Space Is Just a Little Bit Closer Than Expected 130

SpuriousLogic points out a BBC story which begins "The upper reaches of Earth's atmosphere are much lower than expected, a US Air Force satellite has found. Currently, the ionosphere — a layer of charged particles that envelopes the planet — is at an altitude of about 420km, some 200km lower than expected. The behaviour of the ionosphere is important because disturbances in its structure can upset satellite communications and radar."

Comment Frost Angel (Score 1) 501

Sci-fi author Alistair Reynolds explored the concept of emergency euthanasia as a medical procedure in his novel "Pushing Ice". For deep space missions, casualties beyond the facilities of the ship to manage would be suffused with H2S to displace the oxygen before it could start damaging tissues.

Granted; in the story there was unspecified nano-based medicine to facilitate the revival, but the basic idea is there.

Comment Re:FP (Score 5, Informative) 182

850,000lbf (lbf = pounds force) is a relatively small load. It is easy to forget exactly how strong steel is in tension: using standard 50ksi steel (typical structural steel), only about 18 sq-in would be required to hold the rocket down (albeit with no factor of safety).

For comparison, the main cables in the George Washington suspension bridge in New York each carry ~260,000,000lbf, and are designed to resist almost 3 times that load. While the amount of thrust developed by the Falcon 9 is seriously impressive for a lift vehicle, it is trivial from a ground-based engineering standpoint.

There is a reason structural engineers work in kips not pounds (1 kip = 1000lb), and yes IAASE.
Media

MediaDefender's Parent Company Joins P2P Market 40

An anonymous reader writes with news that ArtistDirect, the company who acquired MediaDefender, has launched another company called PiCast for the purpose of P2P video distribution. The reader says: "This is a strange twist for a company which last year set up a video-sharing site called Miivi in an attempt to entrap users uploading copyrighted content, and was caught launching a DoS attack against Revision3, which we discussed earlier this year."
Robotics

First Armed Robots on Patrol in Iraq 661

An anonymous reader writes "Robots have been roaming Iraq, since shortly after the war began. Now, for the first time — the first time in any war zone — the 'bots are carrying guns. The SWORDS robots, armed with M249 machine guns, "haven't fired their weapons yet," an Army official says. "But that'll be happening soon." The machines have actually been ready for a while, but safety concerns kept them off the battlefield. Now, the robots have kill switches, so "now we can kill the unit if it goes crazy," according to the Army. I feel safer already."

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