Most of the links on that page seem to be usb bluetooh or bare modules. If you're looking for turnkey RS-232 bluetooth units (as I was for a project at work), may I highly disrecommend Free2Move's serial port plug. I've been trying to get them to work for weeks and you'd think for nearly $400 for the pair they would at least answer ONE of my emails or pick up the phone for their "tech support" line. STAY AWAY!! I do know what you mean about these things being rare and rediculously expensive though. Maybe I'll try Brainboxes serial converter next.
why is the above moderated +4? the fact taht he believes the myth that an Ice Age was predicted in the 70's by by mainstream science(it wasn't) is alone enough to mod him down not up. besides that, he dismissively refers to climate change scientists as simply "crackpot hippies" out for grant money. anyone so pathetically clueless about the actual scientific process and painstaking research that actually goes into climate modeling deserves to be modded apropriately DOWN.
Since Jamie rather thoughtlessly posted a direct link to the JPL real stream and now none of us can see it; please visit NASA's website listing all the alternate feeds for NASA TV and use one of these instead.
It loos like we said the same thing a few minutes away from eachoter.:) I did not know that dipole fields drop off with the cube of the distance until just now and still don't really fully understand it. do you know of a good site that explains this sort of thing? does anything fall off with the 1/r^4 of the distance for example?
Forgot to mention that it should be noted this technique of nearfield transmission can not be used for high data rate transmission for the following reason: you are limited by the Nyquist frequency. In other words the sampling frequency (your transmitting frequency) must be double that of your desired data rate you want to send. And you can see that because the farfield starts at ~.5 pi wavelengths away from the antenna, as the frequency of the transmiter increases, the distance from the transmitter at which the "farfield" dominates becomes less and less (ie. you are transmitting "conventionally" using EM waves closer and closer to the antenna as freq goes up.) so you are limited to low frequencies for this nearfield transmission technique and therefore can not transmit high data rates.
When I first read the article I thought I smelled BS too. The number of "you can't have a varying magnetic field without a varying electric field!!" post's below also indicate a frustration with the marketroid speek that pervades the article and a general lack of scientific cluelessness of the writer.
The key to understanding how this thing works (and yes the technique is old) is getting to understand the difference between NEARFIELDS and FARFIELDS. The nearfield is the zone CLOSE to the antenna less than.5 pi wavelengths away while the transition zone to the farfield is from.5 pi to 1 wavelength away. Since the magnetic field is decaying with the inverse CUBE of the distance away from the antenna (along its axis anyway) and the electromagnetic field is only decaying with the suare of the distance, eventually the EM field dominates at a certain distance from the emitter (the FARFIELD). These sites helped me understand this much better than I did a few minutes ago:-]. http://www.caves.org/section/commelect/mm/mm06.htm l and http://www-training.llnl.gov/wbt/hc/NonIonizing/Ne arFields.html. again nothing new here just a rehash of a discovery made by Faraday et. al.
Re:I'm as stumped as my girlfriend usually is
on
Telstar 4 is Down
·
· Score: 3, Informative
CW can also mean "continuous wave" such as when youre talking about lasers that aren't pulsed (eg. a laser pointer is CW)
Nope, I just checked with the universe (it took a minute to consult its Big Book Of Phisical Laws) and it said "No, I still don't care. Foolish people are everywhere even in the U.S. Government"(I know!! I couldn't believe it either!)
N.B.: just one example of idiocy in high places; the CIA has wasted much taxpayer money on psychic remote viewing.
(obligatory skeptic's response to pseudoscience on slashdot) Cold fusion is not real. I'm sorry, but the universe dosen't care how much you want it to be real.(end obligatory skeptic's response to pseudoscience on slashdot)
In the same way that the existance of a few scientists who don't believe evolution is real dosen't make evolution false; the existance of a few scientists who think cold fusion might not be a farce dosen't make it real. Wired magazine is a great source of interesting articles on all things geeky but a respectable source of science journalism IT IS NOT!
If you think this guy is brilliant, take a look at this guy's page. He built a CYCLOTRON(!!!) when he was in his senior year of HS! (he's now doing grad school work at Fermilab, what a shocker)
Re:Sounds of the plasma wind
on
Goodbye, Galileo
·
· Score: 4, Interesting
I don't....think they used harmonically related channels...? They did have to downsample the original antenna recording to make it audible to us humans but it's still just a direct full spectrum recording from the plasma wave antenna...I think anyway, correct me if I'm wrong of course. I'm pretty sure the reason it sounds eerie is just due to the natural "noises" (actually EM radiation) given off by electrons spiraling around the magnetic field lines of Ganymede, which is thought to be produced by a salty ocean under it's surface. In a sense you're listening to the ocean on Ganymede.:)
not many intelligent gay guys I know say "fag" unless they're mocking an idiot's use of the word. By the way Adrian is gay. His "boyfriend application" is still around from 2000.
You're wrong about that I'm afraid. It has been known for quite some time how to produce gold from other elements. (calling it artificial gold dosen't make any sense because it's real gold, indistinguishable, of course, from any other atom of gold). It is done by bombarding Mercury with Deuterons: Hg200 + H2 ---> Au198 + He4. Unfortunately Gold 198 is radioactive and decays back to Mercury in a few days. Glen Seaborg did a simillar experiment in the late '70's. The catch is that you would expend much more money to make the energy(probably thousands of times more) to accelerate the Deuterons in order to create the gold than you could ever recover by selling what you produced.
This image and this corresponding daytime image (you can search through all of the THEMIS images from the mars odyssey probe here) show strange and as yet unexplained thermal anomalies on the surface(see here to put the images in context). This is really REALLY important since this is so far the only place on the surface that seems to be emitting heat of a geothermal(ie. not heat from absorbed sunlight) origin. These sites NEED to be imaged by the high resolution camera on MGS as soon as possible to find out wheather they are steaming ice towers or 'fumaroles'(likely due to the huge amount of water ice just discovered under the surface) of the kind found on earth or not. If they are, they are the most promising candidate for life to exist on the surface found to date.
my submission for this story was way more informative "2003-08-20 17:11:37 Using Ultrahigh Power Lasers to "Burn" Rad (science,science) (rejected)" damnit!
anyway a beowulf cluster of vulcan lasers will probably look something like what's being built at the University of Rochester right now called Omega EP. Which will be nearly 10 times as powerfull as Vulcan.:-)
hi can you explain more about the "has to cool for two weeks just from synchrotron radiation" part you were talking about? I thought that the synchrotron radiation would dissapear the instant the beam does since it's only photons......?
uhh hello? I dont know why this is modded to +4 since it's just plain wrong. If you'd actually read the article you linked to and the NYT article you would've known that they're now using BSCCO high temperature superconductors which have critical temperatures well above the boiling point of liquid N2(over 100K).
Slashdot Mirror
Most of the links on that page seem to be usb bluetooh or bare modules. If you're looking for turnkey RS-232 bluetooth units (as I was for a project at work), may I highly disrecommend Free2Move's serial port plug. I've been trying to get them to work for weeks and you'd think for nearly $400 for the pair they would at least answer ONE of my emails or pick up the phone for their "tech support" line. STAY AWAY!! I do know what you mean about these things being rare and rediculously expensive though. Maybe I'll try Brainboxes serial converter next.
why is the above moderated +4? the fact taht he believes the myth that an Ice Age was predicted in the 70's by by mainstream science(it wasn't) is alone enough to mod him down not up. besides that, he dismissively refers to climate change scientists as simply "crackpot hippies" out for grant money. anyone so pathetically clueless about the actual scientific process and painstaking research that actually goes into climate modeling deserves to be modded apropriately DOWN.
Since Jamie rather thoughtlessly posted a direct link to the JPL real stream and now none of us can see it; please visit NASA's website listing all the alternate feeds for NASA TV and use one of these instead.
It loos like we said the same thing a few minutes away from eachoter. :) I did not know that dipole fields drop off with the cube of the distance until just now and still don't really fully understand it. do you know of a good site that explains this sort of thing? does anything fall off with the 1/r^4 of the distance for example?
Forgot to mention that it should be noted this technique of nearfield transmission can not be used for high data rate transmission for the following reason: you are limited by the Nyquist frequency. In other words the sampling frequency (your transmitting frequency) must be double that of your desired data rate you want to send. And you can see that because the farfield starts at ~.5 pi wavelengths away from the antenna, as the frequency of the transmiter increases, the distance from the transmitter at which the "farfield" dominates becomes less and less (ie. you are transmitting "conventionally" using EM waves closer and closer to the antenna as freq goes up.) so you are limited to low frequencies for this nearfield transmission technique and therefore can not transmit high data rates.
When I first read the article I thought I smelled BS too. The number of "you can't have a varying magnetic field without a varying electric field!!" post's below also indicate a frustration with the marketroid speek that pervades the article and a general lack of scientific cluelessness of the writer.
.5 pi wavelengths away while the transition zone to the farfield is from .5 pi to 1 wavelength away. Since the magnetic field is decaying with the inverse CUBE of the distance away from the antenna (along its axis anyway) and the electromagnetic field is only decaying with the suare of the distance, eventually the EM field dominates at a certain distance from the emitter (the FARFIELD). These sites helped me understand this much better than I did a few minutes ago :-]. http://www.caves.org/section/commelect/mm/mm06.htm l and http://www-training.llnl.gov/wbt/hc/NonIonizing/Ne arFields.html. again nothing new here just a rehash of a discovery made by Faraday et. al.
The key to understanding how this thing works (and yes the technique is old) is getting to understand the difference between NEARFIELDS and FARFIELDS. The nearfield is the zone CLOSE to the antenna less than
CW can also mean "continuous wave" such as when youre talking about lasers that aren't pulsed (eg. a laser pointer is CW)
?? um hello? muon catalyzed fusion still only occurs at millions of kelvin inside magnetic bottles. I think that's still pretty hot imho!
Nope, I just checked with the universe (it took a minute to consult its Big Book Of Phisical Laws) and it said "No, I still don't care. Foolish people are everywhere even in the U.S. Government"(I know!! I couldn't believe it either!)
N.B.: just one example of idiocy in high places; the CIA has wasted much taxpayer money on psychic remote viewing.
(obligatory skeptic's response to pseudoscience on slashdot) Cold fusion is not real. I'm sorry, but the universe dosen't care how much you want it to be real.(end obligatory skeptic's response to pseudoscience on slashdot)
In the same way that the existance of a few scientists who don't believe evolution is real dosen't make evolution false; the existance of a few scientists who think cold fusion might not be a farce dosen't make it real. Wired magazine is a great source of interesting articles on all things geeky but a respectable source of science journalism IT IS NOT!
If you think this guy is brilliant, take a look at this guy's page. He built a CYCLOTRON(!!!) when he was in his senior year of HS! (he's now doing grad school work at Fermilab, what a shocker)
"Will my pc run faster if it is facing polar north?"
does it now? duh, your computer already uses magnetic recording techniques and they're SHIELDED. just like this memory will have to be.
why have you added me to your foes?
haha :)! dude, you better watch out, I like guys!
I don't....think they used harmonically related channels...? They did have to downsample the original antenna recording to make it audible to us humans but it's still just a direct full spectrum recording from the plasma wave antenna...I think anyway, correct me if I'm wrong of course. I'm pretty sure the reason it sounds eerie is just due to the natural "noises" (actually EM radiation) given off by electrons spiraling around the magnetic field lines of Ganymede, which is thought to be produced by a salty ocean under it's surface. In a sense you're listening to the ocean on Ganymede. :)
neat i'll do the same
We americans like the "f" word.
geez. what a complment, thanks! :-)
not many intelligent gay guys I know say "fag" unless they're mocking an idiot's use of the word. By the way Adrian is gay. His "boyfriend application" is still around from 2000.
You're wrong about that I'm afraid. It has been known for quite some time how to produce gold from other elements. (calling it artificial gold dosen't make any sense because it's real gold, indistinguishable, of course, from any other atom of gold). It is done by bombarding Mercury with Deuterons: Hg200 + H2 ---> Au198 + He4. Unfortunately Gold 198 is radioactive and decays back to Mercury in a few days. Glen Seaborg did a simillar experiment in the late '70's. The catch is that you would expend much more money to make the energy(probably thousands of times more) to accelerate the Deuterons in order to create the gold than you could ever recover by selling what you produced.
"Or will Moore's law continue without the need for doing more with less silica based real estate?"
:-]
Mmmmmm, silica based real estate....
sorry, as a chemistry geek I'm required by federal law to make a joke when someone confuses Silica or Silicone with Silicon.
Yes "snowmen" would be very interesting indeed.
This image and this corresponding daytime image (you can search through all of the THEMIS images from the mars odyssey probe here) show strange and as yet unexplained thermal anomalies on the surface(see here to put the images in context). This is really REALLY important since this is so far the only place on the surface that seems to be emitting heat of a geothermal(ie. not heat from absorbed sunlight) origin. These sites NEED to be imaged by the high resolution camera on MGS as soon as possible to find out wheather they are steaming ice towers or 'fumaroles'(likely due to the huge amount of water ice just discovered under the surface) of the kind found on earth or not. If they are, they are the most promising candidate for life to exist on the surface found to date.
my submission for this story was way more informative "2003-08-20 17:11:37 Using Ultrahigh Power Lasers to "Burn" Rad (science,science) (rejected)" damnit!
:-)
anyway a beowulf cluster of vulcan lasers will probably look something like what's being built at the University of Rochester right now called Omega EP. Which will be nearly 10 times as powerfull as Vulcan.
hi can you explain more about the "has to cool for two weeks just from synchrotron radiation" part you were talking about? I thought that the synchrotron radiation would dissapear the instant the beam does since it's only photons......?
uhh hello? I dont know why this is modded to +4 since it's just plain wrong. If you'd actually read the article you linked to and the NYT article you would've known that they're now using BSCCO high temperature superconductors which have critical temperatures well above the boiling point of liquid N2(over 100K).