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Comment Re:so how big is it? (Score 2, Interesting) 265

From:

http://en.wikipedia.org/wiki/Path_integral_formulation#Feynman.27s_interpretation

"In order to find the overall probability amplitude for a given process, then, one adds up, or integrates, the amplitude of postulate 3 over the space of all possible histories of the system in between the initial and final states, including histories that are absurd by classical standards."

So, for a photon that goes trough one or the other slit, you integrate over both, and you end up with the interference pattern in your calculation. Also, the same photon goes to the end of the universe, splits into a pair of two cars (one car, one anti-car) that merge back to a photon, then it goes back to your detector behind slits. However, this contributes very little to the end result. However you add all those probabilities.

But from photon's perspective, the universe is contracted to the length of zero in the direction it travels, so, it gets there in zero time, as if its starting point and end point are one and the same.

Can somebody smart connect those two views?

Comment Re:The hidden perk of 3D... (Score 1) 532

I jumped immediately to DVD, and the higher resolution had little to do with it. Tape doesn't support random seek, it degrades in quality noticably over time, and DVD media is smaller. DVDs were functionally better.

That's true. Many people went to DVDs because of functionality. However, even if resolution wasn't a factor in your decision to switch, you'd have to admit it would be pretty rough going back to VHS now that you're used to that resolution. Seriously, break out a VHS tape sometime. Picture quality is truly awful, and you don't get things like native widescreen.

That's the main thrust of my argument - you don't know what you want until you have experienced it. Like those early computers, where people were perfectly happy with 128k of memory - but today 4GB isn't even enough.

Comment xvid is less demanding (Score 2, Insightful) 619

Xvid and divx (mpeg-4 part 2) are far less resource-intensive than h.264. I don't know if anyone's ever tried playing a reasonably sized h.264 encoded video on a PIII, but it usually doesn't work out so well. Avi and divx I'm not so sure about, but I don't see why they had to get rid of xvid. Maybe I'm behind the times, but most of the time when I decide to re-encode something it's because I need to play it on a slow budget box like the ones they have at school.

Comment Re:This only works on poor passwords (Score 1) 570

I. Powerful GPUs are known to perform extremely well on password cracking, and PS3s certainly have them.

Just a note, the PS3s GPU isn't so powerful, based off the nvidia G70 and was, rumor has it, tacked on late in hardware development. The 8 Cell powerpc cpu core's with one dedicated to aspects of the OS and security, and one is a spare to improve production yields. Leaving 6, is where the ps3 gets the bulk of it's processing power.

Comment Maybe C really is "it" for now... (Score 2, Interesting) 831

Despite the large amount of enthusiasm for language design, modern mainstream programming languages don't fall far from the C tree.

Perhaps, like Qwerty, our C-based languages have evolved to be "good enough" for programming needs for the foreseeable future. Make objects, make functions, operate between the two.. sure DVORAK might provide 20% faster typing if you work at it for 3 years, but that's not really enough to warrant the switch. We're unlikely to see a jump again of the size from C to C++ before we hit a major structural change. I had thought the web might be that structural change, but that was well absorbed by extending existing ideas.

Personally, I just want to see programming languages that are more programmer fault-tolerant. I can type "pizza" into my phone and have Chuck-E-Cheese offer to bake one while I drive over, but if I accidentally type "plaeyrArray" instead of "playerArray," the whole world is clearly on fire and everyone is going to die. Why can't compilers be more intelligent about the types of errors they encounter in routine usage? For that matter, why are we still defining code chunks via brackets instead of the indentation that's already there?

Math

Strings Link the Ultra-Cold With the Super-Hot 236

gabrlknght writes "Superstring theory claims the power to explain the universe, but critics say it can't be tested by experiment. Lately, though, string math has helped explain a couple of surprising experiments creating 'perfect liquids' at cosmic extremes of hot and cold. 'Both systems can be described as something like a shadow world sitting in a higher dimension. Strongly coupled particles are linked by ripples traveling through the extra dimension, says Steinberg, of Brookhaven. String math describing such ripples stems from an idea called the holographic principle, used by string theorists to describe certain kinds of black holes. A black hole's entropy depends on its surface area — as though all the information in its three-dimensional interior is stored on its two-dimensional surface. (The 'holographic' label is an allusion to ordinary holograms, where 3-D images are coated on a 2-D surface, like an emblem on a credit card.) The holographic principle has value because in some cases the math for a complex 3-D system (neglecting time) can be too hard to solve, but the equivalent 4-D math provides simpler equations to describe the same phenomena.'"

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