so I emailed its author a quick note of thanks. The next day I found Landing the Internship or Full-Time Job at my doorstep.
Dear Mr. Peterson,
I found your blog really useful in my job search. Thanks a bunch!
Yours truly, Paul Gerken
^^^ That's my idea of a quick note of thanks. Unless this guy has his postal address in his signature, his story is rather suspicious. Would you send your address to a stranger? Or did he find the book at his cubicle-step?
I've found that CRT flicker definitely contributes to eyestrain. This last semester I spent a lot of time in our FPGA lab, where the monitors are set to 75Hz: my eyes were tired after every session. Even 85Hz can result in strain after a while. In contrast, I can work on an LCD all day without trouble.
Most nearsighted people are nearsighted because their eye-focusing muscles have become too weak to focus on distant objects. If you're constantly looking at a close object (e.g. book, monitor), your eyes aren't working very hard. Weak muscles -> more nearsightedness. This is why eye exercises are a good idea.
Well, thanks to McCarthyism, the University of California instated a loyalty oath. Many faculty, especially at Berkeley, refused to sign and therefore were dismissed. However some of these faculty fought the oath in court and won, so I'm not sure the grandparent's statement is presently valid.
6 TB is pretty big for a "small liberal arts college". When I was on the Berkeley network, the typical hub size was around 4 TB, and only went up to 6 at semester's end.
The UC campuses are connected through something (calren?) but Berkeley has a bandwidth cap of 5 GB/week, so that limits the amount transferable off campus, including to other UCs.
They will be weekly, "two-page" strips that are basically the same proportions as the book pages from Tokyopop.
Considering that typical manga chapters are on the order of 20 pages, this storyline is going to take forever. I gather it's something of a webcomic, but it's hard to tell an ambitious manga-type story in 2-page chunks.
I'm imagining that they've syndicated Kenshin, and this week's installment is just a breathtakingly drawn smackdown.
It's so true. I'm taking a fusion class this semester, and it's a constant progression of "this concept looked good, until people tried/analyzed it and found problems; now let's see what's wrong with it."
Definitely puts a damper on my childhood dreams of being the guy to finally bring us fusion.
I would like to point out that the sun emits UV in the same ranges as Cerenkov, so the green cannot be due to any additional UV emitted by theorized nuclear processes. I am also skeptical of the frequency doubling/halving aspects of the argument; doubling typically requires an extremely regular crystal structure, and besides, a Maxwellian distribution of cloud material does not conceptually lend itself to a narrow range of color output.
Your mention of fusion is interesting. The natural abundance of deuterium is extremely low, and proton-proton fusion is so energetically improbable that even in the sun the average proton lifetime is 8 billion years. Therefore I find the argument extremely hard to stomach.
The other issue with your particle accelerator analogy is the lack of a vacuum to operate in. I agree there's tremendous amounts of energy being moved around, and a large potential difference, but no particle is going to traverse the entire electric field without hitting something and being effectively slowed down. Particle accelerators have to run their beamlines in vacuum for that reason.
It's probably Macrovision protection, which adds stuff to the signal, even on composite. If your VCR is old/cheap enough, Macrovision won't have any effect. Consider yourself lucky.
I would advise Mr. Noel that the "green" is definitely not from Cerenkov radiation. I refer him to this, which explains how the sky's blue color is not due to Cerenkov emission (which peaks in the blue-UV region). Cerenkov is very well understood. If Mr. Noel feels strongly that the "green" arises from New Physics, then it cannot be Cerenkov, a phenomenon explained by classical electromagnetism.
I doubt anybody's sat down and done a detailed analysis of what happens in this device. Until somebody does, and works through all the fluid dynamics equations and whatnot, we can't say we know what's going on. That goes both ways.
I'd bet there's some resonance at work. Maybe somebody will analyse this for their Master's thesis.
Note that the page you mention is a mirror of the Wikipedia article on mass. And it doesn't really have anything to do with quantum mechanics - we are taught non-relativistic (and time-independent) QM in undergrad courses.
The main things to take from E^2 - (pc)^2 = (mc^2)^2:
1. Set the mass m equal to 0. We get E = pc, or p = E/c. Thus momentum is defined for massless particles in special relativity. Newtonian mechanics can't handle this correctly.
2. Set the momentum p equal to 0. We get E = mc^2, popularly known as energy-mass equivalence. There's subtleties to it, though; see Relativistic mass.
Slashdot Mirror
We're still talking 10 reactions per bubble collapse. Supposing the ultrasound is 10 MHz, and all the 17.6 MeV produced from DT fusion is recovered:
10 * 10e6 1/s * 17.6e3 eV * 1.6e-19 J/ev = 0.28 microwatts (gross output)
This is going to need some serious scaleup if it's ever going to be a viable power source, provided it can surpass breakeven.
Nice =)
so I emailed its author a quick note of thanks. The next day I found Landing the Internship or Full-Time Job at my doorstep.
Dear Mr. Peterson,
I found your blog really useful in my job search. Thanks a bunch!
Yours truly,
Paul Gerken
^^^ That's my idea of a quick note of thanks. Unless this guy has his postal address in his signature, his story is rather suspicious. Would you send your address to a stranger? Or did he find the book at his cubicle-step?
I've found that CRT flicker definitely contributes to eyestrain. This last semester I spent a lot of time in our FPGA lab, where the monitors are set to 75Hz: my eyes were tired after every session. Even 85Hz can result in strain after a while. In contrast, I can work on an LCD all day without trouble.
/me is 6.5/7 and should do eye exercises
Most nearsighted people are nearsighted because their eye-focusing muscles have become too weak to focus on distant objects. If you're constantly looking at a close object (e.g. book, monitor), your eyes aren't working very hard. Weak muscles -> more nearsightedness. This is why eye exercises are a good idea.
I've looked at a few datasheets, and they all say 100 thousand read-write cycles.
Looks like Micron NAND flash is the same.
I read something about getting > 100k cycles out of an EEPROM, so some applications must approach that limit.
You're right that MHD theory has limits. There exist simulations that make use of the particle-in-cell method.
There's stuff like the V1.0 team, who are gathering articles for a hard-copy release.
Well, thanks to McCarthyism, the University of California instated a loyalty oath. Many faculty, especially at Berkeley, refused to sign and therefore were dismissed. However some of these faculty fought the oath in court and won, so I'm not sure the grandparent's statement is presently valid.
This business also contributed to the Free Speech Movement.
Very cool; thanks :)
Here's a couple TB of data. Find me all the top quark candidates by tomorrow.
Mmm, but people aren't interested in learning fluid dynamics these days.
6 TB is pretty big for a "small liberal arts college". When I was on the Berkeley network, the typical hub size was around 4 TB, and only went up to 6 at semester's end.
The UC campuses are connected through something (calren?) but Berkeley has a bandwidth cap of 5 GB/week, so that limits the amount transferable off campus, including to other UCs.
From VVH's site:
They will be weekly, "two-page" strips that are basically the same proportions as the book pages from Tokyopop.
Considering that typical manga chapters are on the order of 20 pages, this storyline is going to take forever. I gather it's something of a webcomic, but it's hard to tell an ambitious manga-type story in 2-page chunks.
I'm imagining that they've syndicated Kenshin, and this week's installment is just a breathtakingly drawn smackdown.
It's so true. I'm taking a fusion class this semester, and it's a constant progression of "this concept looked good, until people tried/analyzed it and found problems; now let's see what's wrong with it."
Definitely puts a damper on my childhood dreams of being the guy to finally bring us fusion.
You're absolutely right. I shouldn't take /. so seriously =P.
Perhaps it's the name of the front company that Valerie Plame used as cover.
When you've got a fictitious company protecting America, the title isn't "jingoistic": it's just a joke.
Yeah, we have people pushing free pizza and t-shirts.
You seem to be missing my point: it can't be Cherenkov.
I would like to point out that the sun emits UV in the same ranges as Cerenkov, so the green cannot be due to any additional UV emitted by theorized nuclear processes. I am also skeptical of the frequency doubling/halving aspects of the argument; doubling typically requires an extremely regular crystal structure, and besides, a Maxwellian distribution of cloud material does not conceptually lend itself to a narrow range of color output.
Your mention of fusion is interesting. The natural abundance of deuterium is extremely low, and proton-proton fusion is so energetically improbable that even in the sun the average proton lifetime is 8 billion years. Therefore I find the argument extremely hard to stomach.
The other issue with your particle accelerator analogy is the lack of a vacuum to operate in. I agree there's tremendous amounts of energy being moved around, and a large potential difference, but no particle is going to traverse the entire electric field without hitting something and being effectively slowed down. Particle accelerators have to run their beamlines in vacuum for that reason.
Regarding your link to Climate Audit, what about RealClimate? Which blog is to be believed?
It's probably Macrovision protection, which adds stuff to the signal, even on composite. If your VCR is old/cheap enough, Macrovision won't have any effect. Consider yourself lucky.
I would advise Mr. Noel that the "green" is definitely not from Cerenkov radiation. I refer him to this, which explains how the sky's blue color is not due to Cerenkov emission (which peaks in the blue-UV region). Cerenkov is very well understood. If Mr. Noel feels strongly that the "green" arises from New Physics, then it cannot be Cerenkov, a phenomenon explained by classical electromagnetism.
He may also find this green thunderstorm investigation of interest.
I doubt anybody's sat down and done a detailed analysis of what happens in this device. Until somebody does, and works through all the fluid dynamics equations and whatnot, we can't say we know what's going on. That goes both ways.
I'd bet there's some resonance at work. Maybe somebody will analyse this for their Master's thesis.
Right here.
Incidentally, that page has been slashdotted in the past.
Note that the page you mention is a mirror of the Wikipedia article on mass. And it doesn't really have anything to do with quantum mechanics - we are taught non-relativistic (and time-independent) QM in undergrad courses.
The main things to take from E^2 - (pc)^2 = (mc^2)^2:
1. Set the mass m equal to 0. We get E = pc, or p = E/c. Thus momentum is defined for massless particles in special relativity. Newtonian mechanics can't handle this correctly.
2. Set the momentum p equal to 0. We get E = mc^2, popularly known as energy-mass equivalence. There's subtleties to it, though; see Relativistic mass.