Please read the link or the comment. They are using DC currents passed into the mastoid with an electrode attached to the subject's head, not weak magnetic or electric fields.
Actually, at least in the case of the Japanese researchers at NTT, you don't recall correctly. They are passing DC currents directly through their subjects, not exposing them to magnetic fields or RF radiation; see, for example, this article at Forbes. I think anyone that's been shocked can argue that yes, you can detect currents flowing through your body.
Am I the only one that a blind spot sensor scares to death? I can just imagine it now; sure, it lets you know if there's a car next to you, but does it even register that nice, crunchy, bicyclist/motorcycle/pedestrian/baby carriage/nazgul right next to you? Not that people look for those anyway, but it would be the last nail in the coffin for sharing the road if done poorly.
Speaking of which, TFA has almost no detail on these. Anyone have a reference with more that'll make me feel better (or worse)?
Has there been any serious consideration of how the design of the vehicle effects your likeliness to be in a crash? It seems to me that SUV's, by blocking the ability of anyone around them to see in traffic (especially since they always seem to have the darkest of the dark tinted windows), might concievably cause accidents just by being on the road, regardless of how they are driven. (The same argument could be used for some small cars with horrible blind spots; anyone ever driven a Paseo, so I'm somewhat unfairly picking on SUV's here.)
Removing the duplicate lines is enlightening; cat usoft.txt| sed -e 's/(U|updated)//g' | sort | uniq | wc
747 lines cat unix.txt| sed -e 's/ *(Updated) *//g' | sort | uniq | wc
1050 lines
That brings them almost in line with each other. Of course, we could do a half-assed job of cutting things down to just the OS to remove concerns about all the bundled apps;
cat usoft.txt| grep Microsoft | sed -e 's/(U|updated)//g' | sort | uniq | wc
160 lines cat unix.txt| egrep '((K|k)ernel)|(GNU)|(XFree86)' | sed -e 's/ *(Updated) *//g' | sort | uniq | wc # GNU/Linux, not Linux!
167 lines
Of course, any of this would be far too much work for the author of the article.
Figure it at about 20 ft of cable to each room, 8 speakers (!) gives you 160ft of cable. Capacitance will be around 1pf/cm = 30pf/ft (order of magnitude for any reasonable twisted pair), so we'll have around 5nF of capacitance. If the sound card is really a 100 ohm output, this'll give us a -6db frequency of around 1/(2\pi 100ohm 5e-9 farad) = 300khz, about an order of magnitude higher than we care about for audio. I don't think the capacitance is an issue.
Interestingly, to activate a cable modem with Comcast where I live right now, you have to turn off the firewall with XP and run some special software... Then you get exposed to the wonders of the "high speed internet" for several minutes before you can turn it back on again (assuming you remember)... I wonder how many complaints they get that their cable modem "made my computer slow"....
Another fact to keep in mind is that most PC power supplies (switching power supplies in general, actually) are unhappy running unloaded. A few k resistor from each of the rails to ground will be enough to keep it going, although I'd say this is an excellent chance to add some lights. Lights make everything better!
To reply to myself -- they actually suggest it's somewhat *less* efficent than silicon at 10%, but over 10x cheaper, making it more affordable for power generation. Not more compact.
From the Nanosolar FAQ, we get the suggestion it's actually around 100Wp/m^2, or about 10% efficent. (Wp means "Watts at Peak Sunlight")
Q: What is the expected cost per square meter of typical Nanosolar solar cell module?
A: A square meter of (an array of interconnected) Silicon solar cells (a "module") has a product cost of approximately $300 (or $2.75/Wp) from today's cost leaders in Silicon. Nanosolar solar sheets/modules are based on much thinner cells (up to 1000x thinner in their active layer) and tend to cost as little as $30 per square meter, or 10x less. Note that this does not mean that there is a cost/performance difference by this same factor, however, as Silicon solar cells will continue to be the efficiency leaders for the forseeable future.
Perhaps you're having a browser compatability problem. I panned and zoomed over to SF from the initial page, and copied the generated link:
Panning and Zooming to SF
They typically use a good cop/bad cop approach; "the big nasty network admin made me take down your computer, I'm just the poor slob who has to reinstall everything."
At our place, computers are almost always purchased piecemeal out of research grant, so there is no standardization on hardware, OS, or software, aside from the presence of site licenses for some of the more standard kit.
The university I work at uses a simple approach; if a machine is compromised and the person is silly enough to ask for help, or if the compromise is remotely detectable, they immediately cut its network drop. They refuse to reinstate it until a member of IS has been by to reformat the drive and reinstall from scratch, no matter how simple a "cleaning" operation would be.
It's amazing how many people get around to asking "How could I have avoided this" the second or third time they lose their computer for a day or two...
I dunno -- I heard Einstein had a party trick where he made a tasty souffle that couldn't be embedded in a flat 3+1 spacetime. That makes him a pretty good cook in my book!
Acutally, they say they expect 17GW hr per year at that location in their press kit, for a mean production of 2MW. I guess they have pretty steady wind speeds where they put it.
Slashdot Mirror
I have a solution to the problem; I wrote it down at http://www.w3.org/TR/html4/strict.dtd !
Please read the link or the comment. They are using DC currents passed into the mastoid with an electrode attached to the subject's head, not weak magnetic or electric fields.
Actually, at least in the case of the Japanese researchers at NTT, you don't recall correctly. They are passing DC currents directly through their subjects, not exposing them to magnetic fields or RF radiation; see, for example, this article at Forbes. I think anyone that's been shocked can argue that yes, you can detect currents flowing through your body.
Am I the only one that a blind spot sensor scares to death? I can just imagine it now; sure, it lets you know if there's a car next to you, but does it even register that nice, crunchy, bicyclist/motorcycle/pedestrian/baby carriage/nazgul right next to you? Not that people look for those anyway, but it would be the last nail in the coffin for sharing the road if done poorly.
Speaking of which, TFA has almost no detail on these. Anyone have a reference with more that'll make me feel better (or worse)?
Has there been any serious consideration of how the design of the vehicle effects your likeliness to be in a crash? It seems to me that SUV's, by blocking the ability of anyone around them to see in traffic (especially since they always seem to have the darkest of the dark tinted windows), might concievably cause accidents just by being on the road, regardless of how they are driven. (The same argument could be used for some small cars with horrible blind spots; anyone ever driven a Paseo, so I'm somewhat unfairly picking on SUV's here.)
Removing the duplicate lines is enlightening;
cat usoft.txt| sed -e 's/(U|updated)//g' | sort | uniq | wc
747 lines
cat unix.txt| sed -e 's/ *(Updated) *//g' | sort | uniq | wc
1050 lines
That brings them almost in line with each other. Of course, we could do a half-assed job of cutting things down to just the OS to remove concerns about all the bundled apps;
cat usoft.txt| grep Microsoft | sed -e 's/(U|updated)//g' | sort | uniq | wc
160 lines
cat unix.txt| egrep '((K|k)ernel)|(GNU)|(XFree86)' | sed -e 's/ *(Updated) *//g' | sort | uniq | wc # GNU/Linux, not Linux!
167 lines
Of course, any of this would be far too much work for the author of the article.
Figure it at about 20 ft of cable to each room, 8 speakers (!) gives you 160ft of cable. Capacitance will be around 1pf/cm = 30pf/ft (order of magnitude for any reasonable twisted pair), so we'll have around 5nF of capacitance. If the sound card is really a 100 ohm output, this'll give us a -6db frequency of around 1/(2\pi 100ohm 5e-9 farad) = 300khz, about an order of magnitude higher than we care about for audio. I don't think the capacitance is an issue.
Hey, if they're free, I'll take one..
Interestingly, to activate a cable modem with Comcast where I live right now, you have to turn off the firewall with XP and run some special software... Then you get exposed to the wonders of the "high speed internet" for several minutes before you can turn it back on again (assuming you remember)... I wonder how many complaints they get that their cable modem "made my computer slow"....
Another fact to keep in mind is that most PC power supplies (switching power supplies in general, actually) are unhappy running unloaded. A few k resistor from each of the rails to ground will be enough to keep it going, although I'd say this is an excellent chance to add some lights. Lights make everything better!
Unless perhaps it's less durable than asphault shingles, or maybe you live someplace hot and don't want a black roof....
To reply to myself -- they actually suggest it's somewhat *less* efficent than silicon at 10%, but over 10x cheaper, making it more affordable for power generation. Not more compact.
Q: What is the expected cost per square meter of typical Nanosolar solar cell module?
A: A square meter of (an array of interconnected) Silicon solar cells (a "module") has a product cost of approximately $300 (or $2.75/Wp) from today's cost leaders in Silicon. Nanosolar solar sheets/modules are based on much thinner cells (up to 1000x thinner in their active layer) and tend to cost as little as $30 per square meter, or 10x less. Note that this does not mean that there is a cost/performance difference by this same factor, however, as Silicon solar cells will continue to be the efficiency leaders for the forseeable future.
I think I'm not understanding what you don't like about it. Probably not the right forum for discussing it, regardless. Cheers!
Perhaps you're having a browser compatability problem. I panned and zoomed over to SF from the initial page, and copied the generated link: Panning and Zooming to SF
Actually, there's a "link to this page" link in the top-right that does what you want (try clicking on it)
All the googlebombs carry across! Miserable Failure (Near Washington DC)
At our place, computers are almost always purchased piecemeal out of research grant, so there is no standardization on hardware, OS, or software, aside from the presence of site licenses for some of the more standard kit.
It's amazing how many people get around to asking "How could I have avoided this" the second or third time they lose their computer for a day or two...
I dunno -- I heard Einstein had a party trick where he made a tasty souffle that couldn't be embedded in a flat 3+1 spacetime. That makes him a pretty good cook in my book!
Acutally, they say they expect 17GW hr per year at that location in their press kit, for a mean production of 2MW. I guess they have pretty steady wind speeds where they put it.