Forgot your password?

Comment: Re:What am I missing here? (Score 3, Insightful) 223

by DrLudicrous (#47037557) Attached to: Scientists Propose Collider That Could Turn Light Into Matter
Think of photons as the central point from which oscillating magnetic and electric fields originate. And that this point moves through space at ~3x10^8 m/s. It is kind of like throwing two stones into water and watching the resulting interference patterns, excepts that the centers of those patterns are moving instead of stationary. Hence, collision isn't really an apt description.

Comment: Spectroscopy with MRI (Score 3, Informative) 23

by DrLudicrous (#45501307) Attached to: Detecting Chemicals Through Bone
Disclaimer: I am a physicist who works in MRI. MRI can be used to measure concentrations of certain biochemicals. MRI is sensitive enough to different proton-containing species that the frequency difference between fat and water causes image artifacts that can pose great difficulty. Not all biomolecules are sufficiently concentrated in the brain, or have a spectrum that is unique enough to be measured in vivo. A good example of a brain chemical that can be measured is N-acetyl aspartate (NAA), which has a proton peak at around 2 ppm that doesn't overlap with much else. Magnetic resonance spectroscopy is very difficult, and is most easily accomplished on research scanners operating at 3 tesla or higher. The reason for this is that rather than letting all hydrogen nuclei contribute to one signal that is then spatially located, one must parse what kinds of nuclei (i.e. what their chemical shift is) within each voxel. This not only imposes technical difficulties, but reduces the signal to noise ratio, potentially requiring more signal averaging in order to see sufficient signal above the noise floor.

+ - Possible Cyber Attack Against South Korean Banks and TV Stations->

Submitted by
B3ryllium writes "At least four broadcasters and two banks in South Korea are reporting massive computer accessibility issues, saying that their networks are 'paralyzed' by what looks like a cyber attack. Additional reports from Twitter suggest that hundreds of computers in the country powered off simultaneously at 2:20am, and reported "Boot device not found" errors. South Korea's military has upgraded its "Information Operation Condition (INFOCOM)" level from Level 4 to Level 3 in response to this situation."
Link to Original Source

+ - Matthew Keys Indicted in LA Times hacking; faces up to 30 years in jail->

Submitted by B3ryllium
B3ryllium (571199) writes "He's no Aaron Swartz — in fact, it looks like he deliberately encouraged Anonymous to hack his previous employer, and even gave them access credentials to do it — but the indictment appears to recommend charges that could result in up to 30 years in prison and a $750,000 fine. That's not right."
Link to Original Source

Comment: Oh, come on ... heh. (Score 1) 90

by B3ryllium (#43174597) Attached to: Cryptographers Break Commonly Used RC4 Cipher

Many of the available PCI-type scanning tools seem to recommend it, so this is wonderful. Certainly sounds riskier than the recent BEAST vulnerability.

I'm sure this will lead to a few new entries on my cyber attack severity ranking project, as people find ways to apply this attack vector. :(

Anyone know what Cipher Suite configuration is the "safest" now? :)

A computer scientist is someone who fixes things that aren't broken.