Fibre is a good failsafe method. Of course where not pratical you should consider surge arrestors.
I once worked for a telcomms comapny which amongst other things made most of the surge arresotrs used in Italian exchanges.
What I learned is that despite the fact that there are very many different solutions around, the simple and very effective solution uses a gas discharge device in paralell with a transorb (bi-directional zener). The transorb is very fast and has a high voltage, it briefly protects the line before the gas discharge device cuts in after a few milliseconds. The gas discharge device can pass high currents because once arced the voltage falls sharply, reducing the dissipation.
Varistor and other solutions are of little use for protecting data lines against lightning. Varistors are a good and economical solution for mains surge protectors.
When protection devices cut in, you will have big currents flowing, which in turn can generate large voltages if earthing is no good. The isolation built into ethernet standards is caple of withstanding bad earths, RS422/485, and worse 232, is not. Fit isolationg adptors to any serial connections which are not on the same electrical circuit.
Finally, a little home made device which will not recover, but will protect equipment against the biggest surges which could otherwise overload surge arrestors. Break open the cable and pass all conductors and screen through robust but small fuses. The fuses should be suspended just above a very good earth (2/3 mm from a girder that runs into the ground for instance). The wiring and fuses should be kept really short and close together. An easy way to realize this in pratice is PCB mount fuse holders mounted thougth holes drilled in a plastic board. Mount the board on your 'girder' or whatever and adjust the height so the lugs are 2/3 mm abover the surface.
"a sad story of how intolerance helped the British lose their early lead in computing"
The british later did an excellent job of leading the way in computing with the LEO"
There is no doubt in my mind that, genius as Turing was, Britain had plenty more computing epertise available (BTW, I know Pinkerton was from the US), the failure of British computing was purely commercial in the sense that LEO marketed "The commonwealth".
Intolerance comes in when you think about US corporation reluctance to purchase outside the US.
If you want to use Google properly you need to learn a little bit about search strings or you will have to sift through tons of results.
If you want to use a library properly you need to know a little bit about how books are categorised, or you will have to sift through tons on cards.
Anybody who uses a library even occasionaly would know that the books used would be in the reference section near the counter/enterance, and would also know that sports referebce would be at the opposite end from the dictionarys and that Whittickers would be in the middle.
A 10KHz chip sounds like a nice low power solution for a running shoe.
Assuming that is the clock rate, 20,000 readings and 10,000 calculations per second does sound a bit excessive, especcialy as the calculations must involve at least 2 readings.
The main cuase of memory usage on Linux is the use of many different shared libraries and not bloated apps.
I think developers could do more at a library level. For example.....dare I suggest using common sub libraries within libraries, that is people like KDE and GTK get thier heads together and say "are thier functions we include in our libraies that could just as well be linked to an underlying library?"
This is a similar re-hash of the arguments that went on in the 60's and 70's about violence in childrens cartoons. The BBC nearly banned Tom & Jerry!
But these fears have been allayed by the phsycologists view that children, right from an early age, can tell the difference between fantasy worlds of cartoons and the real world.
I would have thought the same is true for video games?
Ferrari have always been putting the closest thing to a racing car on the real road, and I think it would be interesting to pitch the Bugatti against the Enzo on real roads.
BTW, you don't need 1000 HP to do 0-60 in 3 seconds, just tires that are so soft you will have have to change them every couple of hundred miles, which is not long at that speed!
Horse power comes into play at higher speeds, you need a lot of downdraught to get high performance in corners, as well as stay on the road at 250Mph. F1 cars have so much downdraught they could run upside down on the celing ay only 100mph.
The downshot of the downdraught is that you need a lot of horsepower to force those inverted wings througth the air!
"From what I read I seen things differently. Mono is just a language whereas Mozilla is a platform"
Not really. Mono uses C# but must implement the.NET platform (API). Of course this can be done in a Mozilla framework......but it is a case of the cart before the horse!
He moved on from Gnome saying C coding was dead, all hail C#, thus dilating OSS approaches. Mozilla's XUL approach was allready around **before** he started MONO.
Certainly he has boundless energy, but many people were allready pointing out that it could be the case to concentrate on getting P&P functionality with what was allready available (and hence beating MS to the market), rather than play MS at a game of catch up that you could never win (they make the rules).
Slashdot Mirror
I once worked for a telcomms comapny which amongst other things made most of the surge arresotrs used in Italian exchanges.
What I learned is that despite the fact that there are very many different solutions around, the simple and very effective solution uses a gas discharge device in paralell with a transorb (bi-directional zener). The transorb is very fast and has a high voltage, it briefly protects the line before the gas discharge device cuts in after a few milliseconds. The gas discharge device can pass high currents because once arced the voltage falls sharply, reducing the dissipation.
Varistor and other solutions are of little use for protecting data lines against lightning. Varistors are a good and economical solution for mains surge protectors.
When protection devices cut in, you will have big currents flowing, which in turn can generate large voltages if earthing is no good. The isolation built into ethernet standards is caple of withstanding bad earths, RS422/485, and worse 232, is not. Fit isolationg adptors to any serial connections which are not on the same electrical circuit.
Finally, a little home made device which will not recover, but will protect equipment against the biggest surges which could otherwise overload surge arrestors. Break open the cable and pass all conductors and screen through robust but small fuses. The fuses should be suspended just above a very good earth (2/3 mm from a girder that runs into the ground for instance). The wiring and fuses should be kept really short and close together. An easy way to realize this in pratice is PCB mount fuse holders mounted thougth holes drilled in a plastic board. Mount the board on your 'girder' or whatever and adjust the height so the lugs are 2/3 mm abover the surface.
The british later did an excellent job of leading the way in computing with the LEO"
There is no doubt in my mind that, genius as Turing was, Britain had plenty more computing epertise available (BTW, I know Pinkerton was from the US), the failure of British computing was purely commercial in the sense that LEO marketed "The commonwealth".
Intolerance comes in when you think about US corporation reluctance to purchase outside the US.
What is that First Person Shooters icon supposed to represent?
I'm glad to know I am not the only /.er who can't make head or tails of it;-)
This ESA page will give a personal timetable for ISS spotting.
If you want to use a library properly you need to know a little bit about how books are categorised, or you will have to sift through tons on cards.
Anybody who uses a library even occasionaly would know that the books used would be in the reference section near the counter/enterance, and would also know that sports referebce would be at the opposite end from the dictionarys and that Whittickers would be in the middle.
I do. Could you send me any more details/tips please?
Yeah but I bet you couldn't play silly games with it like a real cellphone!
Not to mention boot it ;-)
Oh well, at least it would not take long to BOOT!
Has anybody started a Linux port yet?
Assuming that is the clock rate, 20,000 readings and 10,000 calculations per second does sound a bit excessive, especcialy as the calculations must involve at least 2 readings.
Now, where can I get Pong 101, the final brain death.
This is the only reason I ever use VB6, in some types of project it is a godsend!
Funny thing is that VB.NET does not have this level of debugging. (Yeah...I do know why before you all reply).
Python is a language that could, and should, support such high level fix and retry debug.
I think developers could do more at a library level. For example.....dare I suggest using common sub libraries within libraries, that is people like KDE and GTK get thier heads together and say "are thier functions we include in our libraies that could just as well be linked to an underlying library?"
But these fears have been allayed by the phsycologists view that children, right from an early age, can tell the difference between fantasy worlds of cartoons and the real world.
I would have thought the same is true for video games?
It's not deceptive as noise is also perceived on a logarithmic scale by humans.
They never talk to Steve about these things thougth.
At least they might get a few ideas!
Read my /. journal entry Java !Java ;-)
Ferrari have always been putting the closest thing to a racing car on the real road, and I think it would be interesting to pitch the Bugatti against the Enzo on real roads.
BTW, you don't need 1000 HP to do 0-60 in 3 seconds, just tires that are so soft you will have have to change them every couple of hundred miles, which is not long at that speed!
Horse power comes into play at higher speeds, you need a lot of downdraught to get high performance in corners, as well as stay on the road at 250Mph. F1 cars have so much downdraught they could run upside down on the celing ay only 100mph.
The downshot of the downdraught is that you need a lot of horsepower to force those inverted wings througth the air!
Does he have a 'personal' PayPal account?
Not really. Mono uses C# but must implement the .NET platform (API). Of course this can be done in a Mozilla framework......but it is a case of the cart before the horse!
It is simply a case of time to market.
The answer to your points are historic.
Certainly he has boundless energy, but many people were allready pointing out that it could be the case to concentrate on getting P&P functionality with what was allready available (and hence beating MS to the market), rather than play MS at a game of catch up that you could never win (they make the rules).