When the process of driving has been almost entirely been uploaded into the cerebellum, the process of driving takes very little of your conscious thought. The most important thing then becomes staying awake. A few 'distractions' will serve you quite well there.
Oh, and don't you love those 'how dangerous is using a mobile phone' tests? The person on the other end asking them complex logical or mathematical questions while they are tasked with driving the car through a tight obstacle course, reversing or taking evasive action? And how the drivers don't do what any driver in a real situation would do - Tell the person on the other end that they are driving and can't answer the complex question, of just drop the phone when they need to evade something? Or, realistically, the driver in question would not attempt the tasks, even if they weren't on the phone. (What, drive my car down that narrow path? I'll loose my bumper before I'm half way there!)
And lastly, don't you hate those 'increase the risk by n%' statements? They are completely meaningless unless the base risk is also stated. If the risk of something happening is.01% normally, and.015% if I do or not do something, then the number I am interested in is.005%, the absolute increase in the risk, not a relative 50%
Opendns has an option to automatically 'correct'.cm requests to.com, which I always turn on. If Cameroon does not want people doing this, then it would have to police it's domain closely, instead of using it as a cash cow.
I did not say that it was not an issue with LCDs: There is obviously the data cable and data handling circuitry to consider. But it is a much greater issue with CRTs: literally, all you need is a VHF arial, feed the signal into a CRT, and tweak until you have a readable image. With LCDs, if you can catch the digital signal, you can recover the data. But the signal is weaker (10s of volts, not thousands!), and higher frequency, so you need to be closer. The problem can be eliminated if you implement encryption over that digital link.
So, yes, still an issue that needs handling with LCDs, but not as intractable.
Several ideas. Of course, use LCDs, as the CRT circuitry is the bad one. Shield the data connections so they don't radiate too much. Make the connections that transmit unencrypted data short. Use low-contrast fonts, so the sharp edges do not cause large voltage (and therefore EMI) spikes. Randomise the low bits of data shown on the screen, so you create obfuscating noise.
Maybe you have to go as far as have a white noise transmitter to mask what you cannot elimiate. Plenty of room to move. Good on them for having such a contest - it flushed out all the 'Ooh, I didn't think of that' problems.
I like to watch "Media Watch" on ABC (Australia). It is great to keep abreast of what the media has been up to, and hear about the stories that were grossly exaggerated, or actually untrue. In many cases, research via a quick google search would be an improvement on the publish-this-one-source stuff that is all too common.
Many people have retrieved the robots.txt files, and many of them specifically allow google's bots.
So his sites explicitly allow google to index his sites. So any statement of copyright infringement or fair use is moot: Google's use of the material is with clear, explicit, written permission.
One would think they would step up the 60Hz AC, then rectify, but I don't know. It depends on how good high-voltage switchmode circuitry is, but you would think that the radiative losses of 500kV at 5 or 10 kHz would be too much. A transformer to carry that much current must be big, so the switchmode gains (largely based around the physically smaller transformer) wouldn't be there. At least, that's me thinking. Ask someone with a physics degree if you need to know.
Copper is very expensive, and not getting any cheaper. The amount of copper needed to transmit 7000 amps, which is the figures others have bandied about above, is immense. Suffice to say copper has not been used for transmission lines for some time. It's all aluminium-clad steel these days. Even then, the amount of cable needed is huge.
AC circuits have radiative losses as well, and AC circuits have a lower voltage limit. The only reason why we still have high voltage AC transmission is that the technology to efficiently rectify and invert several thousand amps at half a million volts is still a new and expensive science.
The reason why we are using superconducting DC here is that they already have to convert to DC to move power between the grids, because the phases are all different, and will drift relative to each other. So they may as well transfer between the grids in DC, and while they are at it, eliminate transmission losses entirely with superconductors.
Yes, P is zero. The power loss in a superconducting cable is zero. As is the V. The voltage drop across a superconducting cable is zero. So I=V/r becomes I=0/0, which is to say, I is undefined (NaN, I guess) by that equation. And P=VI becomes 0=0*I, which is also correct.
Of course, that cable can be carrying a large current at a high voltage above ground, and so be carrying a large amount of power.
Interesting: Is that why they are using a triangle? Will the current flow around the triangle? In typing this I realized that (silly thought!) earth return would be impossible, so they will need a return path for the current.Putting two expensive wires side by side would be a waste, and what about the strong electric field between the two? And would a high current looping around that triangle store usable energy? (Hmm. A superconducting inductor? Nice!)
A good point! A tester can tell you what it tested when an error occurred, But that is not always the cause. An error while testing the memory could be caused by the cpu's cache that the data passed through, or the motherboard circuitry. Same thing for the GPU - was it an error in the GPU, or was it an error getting the data to or from the GPU, or a cpu error while analyzing it?
All to often, you just can't tell. Welcome to the world of PC repair. Add a fault that doesn't show up when the system is warm, and we start to become bald!
While that is good "Bad or Maybe" test, most PSU problems are transient over- or under-voltage conditions, which a DMM is not going to reveal. And there are testers that will measure all (or most) of the voltages produced at once - you jut plug the atx cable into the device, and many of them have a pass-through, so you can test the PSU under load. I'd look for one that could flag a transient problem, if it exists.
Mind you, since writing the above I have looked around for one, and have failed! They all are pretty simple devices that do not detect transients, I could find no pass-through devices, and they all test under very anemic loads. All told, I am not impressed by any of them.
My server just mails me its daily security run, and most days there is a couple of brute force attempts. I am yet to see it even target a valid account name, let alone getting around to guessing my totally random mixed case alpha-numeric password. Oh, and i have sshguard blocking them at the firewall, just to keep log-file pollution down.
Another point that is worth noting is that Sun makes getting a license to distribute your build of java a real pain. The hoops the FreeBSD foundation has to jump through to get a binary released means that they are always behind. So many of us use the binary release (diablo) to bootstrap a build from source to get an up-to-date java.
That's right. Intel disables VT on some chips to artificially create different market segments. AMD doesn't play this particular game, and their VT equipment is usable on all their chips.
Will you people stop complaining about moderation! Moderators are just people who make comments. They are then given mod points randomly. So You can moderate: Just make a few logical comments and you'll get a good Karma, and you'll then get mod points every few months. If you really want them, then go an meta-moderate a few times, and you'll get them more often. Then you can start complaining about YOURSELF!
While you are technically correct, most switching (we tend to call them switchmode) power supplies tend to support a wide range of voltages these days, while analogue power supplies are made for one voltage, by their nature. (I've even heard reports of issues where an analogue power supply rated for 220-240V causes under-voltage problems on 220.) So, if you are looking for something that will run on 110 and 220, then the first thing you look for is a switchmode power supply. Then you check it's ratings.
I have heard people say that 'switchmode' means that it has a voltage switch on it, though, which is rubbish, of course.
If they sold you a copy of their altered VNC without providing source, then, yes. If they didn't, then no.
A big part of the comments above hashed this out. A company distributing GPL software has (now) three options: 1, Provide the source with the binaries (say, on the same CD), 2, Include a notice that offers anyone anywhere the opportunity to get the source from them at a nominal cost, or 3. Post it on a server somewhere and include the URL with the documentation (GPLv3 only).
Possibly, as they messed up and didn't do 1, then they could argued that they are required to 2 or 3, but that is stretching things.
This case, in French law at least, has provided a precedent for forcing a company missusing GPL code to provide you with the source, and a GPL licence for it. Could be a useful precedent!
It's our turn with the dust up here in North Queensland. Mind you, it is not nearly as bad, merely masking out the mountains. Should get a spectacular sunset this afternoon.
Which would require a 5 megabit upload rate. There aren't many people on this planet that can get a domestic service that does that - even businesses would find it expensive. Best I could get here is a 4 Megabit, if a progressive company would put equipment in the local exchange.
Great! Now, where can I download the schematics and datasheets for a Canon 50D? And they don't just want camera drivers (that's done, thanks gphoto!) They want to write their own firmware.
If we could just get those, we wouldn't need FrankenCamera. But we aren't going to get them, based on past experience, so the wheel must be reinvented, again.
Next time you are at your supermarket, pick up an aerosol can of whipped cream. Check the label: the propellant is probably Nitrous Oxide. And the biggest source of Nox is automotive exhausts, or anywhere where oxygen-depleted air gets very hot.
sorry, I'm actually a bit wrong there. HSK provided the pictures that we have all seen of the first step - my recollections of reading were wrong. It was Goldstone had the polarity wrong. HSK's video technician was a veteran of live TV, and adjusted his picture live, as he would have done on TV. Goldstone's techicicans seemed to have left their equipment on the calculated defaults, so the results were not as good. Whether they fixed that later I don't know: By that time, the Parkes signal was being used. It is uncertain how good the images from Parkes were before the world switched to them 8 minutes in. They were certainly better than the HSK and Goldstone images that were transmitted. Oh for the Parkes magnetic tapes!
If they were from Honeysuckle creek, then they aren't of very good quality. Australia was only sending HSK's images to US early on (first step, etc), and US used Goldstone's pictures because - well, HSK had the polarity wrong to start with, and they were sending a negative image, and the quality was worse.
The quality images were ones taken of SSTV screens at Parkes (and other localities) with polariod cameras back in '69. Video of that quality of the moon landings would be epic, but I am not hopefull.
Slashdot Mirror
When the process of driving has been almost entirely been uploaded into the cerebellum, the process of driving takes very little of your conscious thought. The most important thing then becomes staying awake. A few 'distractions' will serve you quite well there.
Oh, and don't you love those 'how dangerous is using a mobile phone' tests? The person on the other end asking them complex logical or mathematical questions while they are tasked with driving the car through a tight obstacle course, reversing or taking evasive action? And how the drivers don't do what any driver in a real situation would do - Tell the person on the other end that they are driving and can't answer the complex question, of just drop the phone when they need to evade something? Or, realistically, the driver in question would not attempt the tasks, even if they weren't on the phone. (What, drive my car down that narrow path? I'll loose my bumper before I'm half way there!)
And lastly, don't you hate those 'increase the risk by n%' statements? They are completely meaningless unless the base risk is also stated. If the risk of something happening is .01% normally, and .015% if I do or not do something, then the number I am interested in is .005%, the absolute increase in the risk, not a relative 50%
Opendns has an option to automatically 'correct' .cm requests to .com, which I always turn on. If Cameroon does not want people doing this, then it would have to police it's domain closely, instead of using it as a cash cow.
I did not say that it was not an issue with LCDs: There is obviously the data cable and data handling circuitry to consider. But it is a much greater issue with CRTs: literally, all you need is a VHF arial, feed the signal into a CRT, and tweak until you have a readable image.
With LCDs, if you can catch the digital signal, you can recover the data. But the signal is weaker (10s of volts, not thousands!), and higher frequency, so you need to be closer. The problem can be eliminated if you implement encryption over that digital link.
So, yes, still an issue that needs handling with LCDs, but not as intractable.
Several ideas. Of course, use LCDs, as the CRT circuitry is the bad one. Shield the data connections so they don't radiate too much. Make the connections that transmit unencrypted data short. Use low-contrast fonts, so the sharp edges do not cause large voltage (and therefore EMI) spikes. Randomise the low bits of data shown on the screen, so you create obfuscating noise.
Maybe you have to go as far as have a white noise transmitter to mask what you cannot elimiate. Plenty of room to move. Good on them for having such a contest - it flushed out all the 'Ooh, I didn't think of that' problems.
But he's not crushing the opposition, he spends most of the time trying to crush the government.
I like to watch "Media Watch" on ABC (Australia). It is great to keep abreast of what the media has been up to, and hear about the stories that were grossly exaggerated, or actually untrue. In many cases, research via a quick google search would be an improvement on the publish-this-one-source stuff that is all too common.
Many people have retrieved the robots.txt files, and many of them specifically allow google's bots.
So his sites explicitly allow google to index his sites. So any statement of copyright infringement or fair use is moot: Google's use of the material is with clear, explicit, written permission.
One would think they would step up the 60Hz AC, then rectify, but I don't know. It depends on how good high-voltage switchmode circuitry is, but you would think that the radiative losses of 500kV at 5 or 10 kHz would be too much.
A transformer to carry that much current must be big, so the switchmode gains (largely based around the physically smaller transformer) wouldn't be there.
At least, that's me thinking. Ask someone with a physics degree if you need to know.
Copper is very expensive, and not getting any cheaper. The amount of copper needed to transmit 7000 amps, which is the figures others have bandied about above, is immense.
Suffice to say copper has not been used for transmission lines for some time. It's all aluminium-clad steel these days. Even then, the amount of cable needed is huge.
AC circuits have radiative losses as well, and AC circuits have a lower voltage limit.
The only reason why we still have high voltage AC transmission is that the technology to efficiently rectify and invert several thousand amps at half a million volts is still a new and expensive science.
The reason why we are using superconducting DC here is that they already have to convert to DC to move power between the grids, because the phases are all different, and will drift relative to each other. So they may as well transfer between the grids in DC, and while they are at it, eliminate transmission losses entirely with superconductors.
Yes, P is zero. The power loss in a superconducting cable is zero. As is the V. The voltage drop across a superconducting cable is zero. So I=V/r becomes I=0/0, which is to say, I is undefined (NaN, I guess) by that equation. And P=VI becomes 0=0*I, which is also correct.
Of course, that cable can be carrying a large current at a high voltage above ground, and so be carrying a large amount of power.
Interesting: Is that why they are using a triangle? Will the current flow around the triangle? In typing this I realized that (silly thought!) earth return would be impossible, so they will need a return path for the current.Putting two expensive wires side by side would be a waste, and what about the strong electric field between the two?
And would a high current looping around that triangle store usable energy?
(Hmm. A superconducting inductor? Nice!)
A good point! A tester can tell you what it tested when an error occurred, But that is not always the cause. An error while testing the memory could be caused by the cpu's cache that the data passed through, or the motherboard circuitry. Same thing for the GPU - was it an error in the GPU, or was it an error getting the data to or from the GPU, or a cpu error while analyzing it?
All to often, you just can't tell. Welcome to the world of PC repair. Add a fault that doesn't show up when the system is warm, and we start to become bald!
While that is good "Bad or Maybe" test, most PSU problems are transient over- or under-voltage conditions, which a DMM is not going to reveal.
And there are testers that will measure all (or most) of the voltages produced at once - you jut plug the atx cable into the device, and many of them have a pass-through, so you can test the PSU under load. I'd look for one that could flag a transient problem, if it exists.
Mind you, since writing the above I have looked around for one, and have failed! They all are pretty simple devices that do not detect transients, I could find no pass-through devices, and they all test under very anemic loads. All told, I am not impressed by any of them.
My server just mails me its daily security run, and most days there is a couple of brute force attempts. I am yet to see it even target a valid account name, let alone getting around to guessing my totally random mixed case alpha-numeric password.
Oh, and i have sshguard blocking them at the firewall, just to keep log-file pollution down.
Another point that is worth noting is that Sun makes getting a license to distribute your build of java a real pain. The hoops the FreeBSD foundation has to jump through to get a binary released means that they are always behind. So many of us use the binary release (diablo) to bootstrap a build from source to get an up-to-date java.
That's right. Intel disables VT on some chips to artificially create different market segments. AMD doesn't play this particular game, and their VT equipment is usable on all their chips.
Will you people stop complaining about moderation! Moderators are just people who make comments. They are then given mod points randomly. So You can moderate: Just make a few logical comments and you'll get a good Karma, and you'll then get mod points every few months. If you really want them, then go an meta-moderate a few times, and you'll get them more often.
Then you can start complaining about YOURSELF!
While you are technically correct, most switching (we tend to call them switchmode) power supplies tend to support a wide range of voltages these days, while analogue power supplies are made for one voltage, by their nature. (I've even heard reports of issues where an analogue power supply rated for 220-240V causes under-voltage problems on 220.)
So, if you are looking for something that will run on 110 and 220, then the first thing you look for is a switchmode power supply. Then you check it's ratings.
I have heard people say that 'switchmode' means that it has a voltage switch on it, though, which is rubbish, of course.
If they sold you a copy of their altered VNC without providing source, then, yes. If they didn't, then no.
A big part of the comments above hashed this out. A company distributing GPL software has (now) three options: 1, Provide the source with the binaries (say, on the same CD), 2, Include a notice that offers anyone anywhere the opportunity to get the source from them at a nominal cost, or 3. Post it on a server somewhere and include the URL with the documentation (GPLv3 only).
Possibly, as they messed up and didn't do 1, then they could argued that they are required to 2 or 3, but that is stretching things.
This case, in French law at least, has provided a precedent for forcing a company missusing GPL code to provide you with the source, and a GPL licence for it. Could be a useful precedent!
It's our turn with the dust up here in North Queensland. Mind you, it is not nearly as bad, merely masking out the mountains. Should get a spectacular sunset this afternoon.
Which would require a 5 megabit upload rate. There aren't many people on this planet that can get a domestic service that does that - even businesses would find it expensive. Best I could get here is a 4 Megabit, if a progressive company would put equipment in the local exchange.
Great! Now, where can I download the schematics and datasheets for a Canon 50D?
And they don't just want camera drivers (that's done, thanks gphoto!) They want to write their own firmware.
If we could just get those, we wouldn't need FrankenCamera. But we aren't going to get them, based on past experience, so the wheel must be reinvented, again.
Next time you are at your supermarket, pick up an aerosol can of whipped cream. Check the label: the propellant is probably Nitrous Oxide.
And the biggest source of Nox is automotive exhausts, or anywhere where oxygen-depleted air gets very hot.
sorry, I'm actually a bit wrong there. HSK provided the pictures that we have all seen of the first step - my recollections of reading were wrong. It was Goldstone had the polarity wrong. HSK's video technician was a veteran of live TV, and adjusted his picture live, as he would have done on TV. Goldstone's techicicans seemed to have left their equipment on the calculated defaults, so the results were not as good. Whether they fixed that later I don't know: By that time, the Parkes signal was being used.
It is uncertain how good the images from Parkes were before the world switched to them 8 minutes in. They were certainly better than the HSK and Goldstone images that were transmitted. Oh for the Parkes magnetic tapes!
If they were from Honeysuckle creek, then they aren't of very good quality. Australia was only sending HSK's images to US early on (first step, etc), and US used Goldstone's pictures because - well, HSK had the polarity wrong to start with, and they were sending a negative image, and the quality was worse.
The quality images were ones taken of SSTV screens at Parkes (and other localities) with polariod cameras back in '69. Video of that quality of the moon landings would be epic, but I am not hopefull.