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Comment Happy Student (Score 4, Interesting) 286

I'm currently teaching myself linear algebra with the aid of Khan's videos, and I couldn't be happier with the quality of the material.

The fact that his work is steadily garnering more attention is a good thing in my view, since it increases the likelihood of more excellent videos being made available for free as a result of donations, grants, etc.

Comment Re:Reversible? (Score 1) 392

No. Think about it - in space, to "slow something down" means the same thing as "speeding something up," that is, changing an object's velocity (commonly known as acceleration.)

As such, you'd have to spend energy to accelerate toward your target, and when you were about to reach it, decelerate (i.e. accelerate in the opposite direction) in order not to go past it.

Another way to think about it is that in your inertial frame, you are always resting. So there is no kinetic energy to "absorb" to slow down since you aren't actually moving, from your point of view. Of course, that small planetoid in front appears to be moving towards you at a large rate, but good luck "absorbing" the kinetic energy from that impact :)
Space

Submission + - NASA Confirms Jupiter Impact (nasa.gov)

An anonymous reader writes: "Following up on a tip by an amateur astronomer that a new dark "scar" had suddenly appeared on Jupiter, this morning between 3 and 9 a.m. PDT (6 a.m. and noon EDT) scientists at NASA's Jet Propulsion Laboratory in Pasadena, Calif., using NASA's Infrared Telescope Facility at the summit of Mauna Kea, Hawaii, gathered evidence indicating an impact. New infrared images show the likely impact point was near the south polar region, with a visibly dark "scar" and bright upwelling particles in the upper atmosphere detected in near-infrared wavelengths, and a warming of the upper troposphere with possible extra emission from ammonia gas detected at mid-infrared wavelengths." GD — Follow the link to Nasa for a lovely shot of the scar -

Comment Re:We're so smart we never bother to test (Score 1) 855

Really, just making a textbox that didn't accept spaces or other invalid input (displaying a text message below the box when the user attempts to type an invalid character) would solve all the issues.

I believe this technique is already commonly used in several Windows applications and the OS itself. I can't remember if I've seen the same for OSX.

Comment Re:This just says it all: (Score 1) 315

Firstly, the words 'innocent' and 'guilty' do not belong in a civil suit. The questions the jury had to answer were whether the defendant infringed on the plaintiffs copyrights, and how much the defendant should pay in damages.

After reading the transcripts, I'm of the opinion that she did willfully infringe. However, the point I tried to make was that large corporations (or in this case, a whole group of large corporations) have financial resources that are simply incomparable to the resources accessible by a private individual. This makes for extremely lopsided trials where the better funded lawyer can call expert after expert until the defense is trounced.

Then there is the matter of quality of representation. It seems to me, from the transcripts, that the defense picked an extremely poor strategy (trying to call the evidence into doubt) rather than trying to mitigate the amount damages that the defendant would have to pay. This of course resulted in rather substantial damages when the defended was found to have made and distributed infringing copies.

Comment This just says it all: (Score 5, Informative) 315

FTFA:

Capitol Records, Inc., a Delaware corporation; Sony BMG Music Entertainment, a Delaware general partnership; Arista Records, LLC, a Delaware limited liability company; Interscope Records, a California general partnership; Warner Bros. Records, Inc., a Delaware corporation; and UMG Recordings, Inc., a Delaware corporation,
Plaintiffs,

vs.

Jammie Thomas,
Defendant.

I rest my case.

Security

Submission + - AOL's Embarassing Password Woes

An anonymous reader writes: AOL.com users may think they have up to sixteen characters to use as a password, but they'd be wrong, thanks to this security artifact detailed by The Washington Post's Security Fix blog: "Well, it turns out that when someone signs up for an AOL.com account, the user appears to be allowed to enter up to a 16-character password. AOL's system, however, doesn't read past the first eight characters." This means that a user who uses "password123" or any other obvious eight-character password with random numbers on the end is in effect using just that lame eight-character password.
The Courts

Submission + - US makes Gattaca-like discrimination illegal

Soulshift writes: NewScientist reports that a law has been passed in the US that prevents companies from denying jobs or insurance to citizens based on the results of genetic tests. This purportedly addresses scenarios where corporations might employ people preferentially based on their genetic "fitness." From the article: "Clearly the House finally understood the incredible significance this has. The American public can now access genetic tests, feel safe about their genetic information not being misused and participate in research that involves genetic information."

The full text of the bill can be found here.

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