Cryptonomicon is a good book, as is Enigma by Robert Harris.. however, they are works of fiction.
The Germans changed the wheel order, start positions, and reflector positions on the Enigma machines nightly, but that wasn't enough. The operators often used the same start codes over and over again, they sent predictable messages, and, like I said, there were issues with the Enigma itself. The UK RAF set up 'traps' by mining specific locations of the English Channel, and then Bletchly Park knew that the messages from specific lookout posts would contain the coordinates of the mines.. a very useful crib.
Try books such as Station X, Engima, Seizing The Enigma, and The Code Book for a readable history..
(The Code Book even has a nice challenge at the end (although the prize has been claimed))
Poland got there first, but when the Germans invaded completely ran out of resources and handed all their research over to England. A lot of work further down the line, and we (I'm English) were breaking the 3 wheel standard Enigma within hours of getting the first encrypted transmissions, thanks to Turing's 'bombes' (electro mechanical decrypting devices).
However, when it came to the German naval Enigma, the 4 wheel version, we ground to a halt. We didn't have the resources to build enough hardware to break the crypts within any time that the info would have helped. So we called in the US to help build more gear.. It was a big team effort.
Note however, that the 3rd Reich trusted Enigma utterly. They fell into the trap of thinking they were completely secure, and that was the downfall of Enigma, as it would be of any trusted encryption. Encryption by definition is breakable in a certain length of time. The problem with Enigma was that there were backdoors, such as the fact it never encrypted any letter as itself. The security of AES is currently being hailed as the fact it has a key field 10 to the 21 times larger than 56bit DES. Great. Only an idiot would try to brute force it though, so the number of keys is somewhat arbitrary.
Another reason for mobile phones being further ahead in Europe is that the major innovators in the industry are European. Nokia, Ericsson, Siemens to name a few of the bigger manufacturers. There are others, such as Sony and Panasonic, but they're not often on anyones 'Favourite Phone' list.
Answering the question right adds a link and increases the pot. Answer the question wrong and the pot disappears completely. Say "BANK" (or "PASS" or whatever) and the pot gets banked and resets to zero and play moves onto the next person
If it were played in this way, one intelligent person would rack up some money for the whole 'team', and promptly get voted off near the end. It wouldn't work.
As for saying the show is 'too hard', and 'they don't give away enough money', tough luck. The idea is not to redistribute wealth, its to make an entertaining game show. If the contestants were to play the game properly then it'd work very well. But they don't. It boils down to tactical voting and temporary alliances. I'm English, and occasionally watch the UK edition of the show. Frequently we have contestants that don't get a single answer wrong, and they're soon voted off. Its a shame that the show rewards the sneaky morons and doesn't give the people who know what they're on about what they deserve. But then, thats like the rest of life isn't it.
Often worse than that.. the dreaded visibile:hidden CSS/DHTML that the likes of Dreamweaver is so keen on.. what the eye can't seen the robot certainly can..
Even factoring in the Earths radius in makes the two orbits 7532km and 38000km.. thats a difference of a factor of 5 and a bit. 7000m/s-1 surely wouldn't be enough to keep the relative distance the same? (And, rereading the article, it doesn't say the relative speed in 7000m/s.. it says, and I quote, the partner spacecraft flying at a speed of 7000 m/s.. there is no mention of the second crafts speed.
Considering the vastly different orbit heights (832km and 31000km) surely the two satellittes must be going at very different velocities. A little basic mathes show us :
2 * PI * 832 = 5,227,610m
2 * PI * 31000 = 194,778,744m
So the total linear distance travelled in each orbit is very different (assuming that the two heights are taken from the centre of the Earth. Which they aren't. Can't be bothered to factor in Earth's radius). So, at 7000m/s-1, the outer satellitte would take about 8 hours longer per orbit, evidently showing the relative distance would be changing, and making the targetting process much more of a challenge.
So.. presumably 7000m/s-1 is the speed of one of the satellittes (I'm guessing inner)..
PS. I think my mathes is screwy. Its early. I have no coffee.
Much as we'd all like the communal aspect to be unaffected it simply isn't true. Anyone who works for a company making their co-workers redundant will tell you that they have less and less time to devote to an outside project. In simplest terms, we have less free time.
Of course, those working on OSS project who are made redundant will have much much more.. perhaps it'll balance out.
Wrong bridge. The one that sways is in London, this is 200 miles away (its quite far in the little old UK) in Newcastle. I live near this bridge. And its very impressive. Best part of it (imho) is the fact its so well balanced it only costs GBP1.30 (approx $1.8) to raise and lower it, something it does about 2 or 3 times a day.
Because, simply, it would mean a surgeon wouldn't have to travel the world to operate on different people. He/She could work on someone in Paris, and then a few hours later do another operation on someone in Sydney, and then another on someone in Los Angles. Qualified surgeons are a rare bunch and the more people who have access to their skills the better..
Also, sometimes surgeons can't be there. How about operating in a war zone. Or on an astronaut in space..
Slashdot Mirror
Cryptonomicon is a good book, as is Enigma by Robert Harris.. however, they are works of fiction.
The Germans changed the wheel order, start positions, and reflector positions on the Enigma machines nightly, but that wasn't enough. The operators often used the same start codes over and over again, they sent predictable messages, and, like I said, there were issues with the Enigma itself. The UK RAF set up 'traps' by mining specific locations of the English Channel, and then Bletchly Park knew that the messages from specific lookout posts would contain the coordinates of the mines.. a very useful crib.
Try books such as Station X, Engima, Seizing The Enigma, and The Code Book for a readable history..
(The Code Book even has a nice challenge at the end (although the prize has been claimed))
If you could actually see inside the CRT ( cathode ray tube ) itself, the screen brightness would probably be a bit lacking.
Poland got there first, but when the Germans invaded completely ran out of resources and handed all their research over to England. A lot of work further down the line, and we (I'm English) were breaking the 3 wheel standard Enigma within hours of getting the first encrypted transmissions, thanks to Turing's 'bombes' (electro mechanical decrypting devices).
However, when it came to the German naval Enigma, the 4 wheel version, we ground to a halt. We didn't have the resources to build enough hardware to break the crypts within any time that the info would have helped. So we called in the US to help build more gear.. It was a big team effort.
Note however, that the 3rd Reich trusted Enigma utterly. They fell into the trap of thinking they were completely secure, and that was the downfall of Enigma, as it would be of any trusted encryption. Encryption by definition is breakable in a certain length of time. The problem with Enigma was that there were backdoors, such as the fact it never encrypted any letter as itself. The security of AES is currently being hailed as the fact it has a key field 10 to the 21 times larger than 56bit DES. Great. Only an idiot would try to brute force it though, so the number of keys is somewhat arbitrary.
Thats the 'Stuff that matters' bit..
:)
Another reason for mobile phones being further ahead in Europe is that the major innovators in the industry are European. Nokia, Ericsson, Siemens to name a few of the bigger manufacturers. There are others, such as Sony and Panasonic, but they're not often on anyones 'Favourite Phone' list.
Just give me a Nokia 7650 and I'll be happy.
The holodeck tuck shop I think..
you can have different genres of music for driving/working out etc
Working out? You realise this is slashdot, right?
Answering the question right adds a link and increases the pot. Answer the question wrong and the pot disappears completely. Say "BANK" (or "PASS" or whatever) and the pot gets banked and resets to zero and play moves onto the next person
If it were played in this way, one intelligent person would rack up some money for the whole 'team', and promptly get voted off near the end. It wouldn't work.
As for saying the show is 'too hard', and 'they don't give away enough money', tough luck. The idea is not to redistribute wealth, its to make an entertaining game show. If the contestants were to play the game properly then it'd work very well. But they don't. It boils down to tactical voting and temporary alliances. I'm English, and occasionally watch the UK edition of the show. Frequently we have contestants that don't get a single answer wrong, and they're soon voted off. Its a shame that the show rewards the sneaky morons and doesn't give the people who know what they're on about what they deserve. But then, thats like the rest of life isn't it.
Often worse than that.. the dreaded visibile:hidden CSS/DHTML that the likes of Dreamweaver is so keen on.. what the eye can't seen the robot certainly can..
Even factoring in the Earths radius in makes the two orbits 7532km and 38000km .. thats a difference of a factor of 5 and a bit. 7000m/s-1 surely wouldn't be enough to keep the relative distance the same? (And, rereading the article, it doesn't say the relative speed in 7000m/s.. it says, and I quote, the partner spacecraft flying at a speed of 7000 m/s.. there is no mention of the second crafts speed.
Yes.. the Lesser Spotted Marsh Warbler is famous in ornithological circles for its advanced SatComms..
Considering the vastly different orbit heights (832km and 31000km) surely the two satellittes must be going at very different velocities. A little basic mathes show us :
2 * PI * 832 = 5,227,610m
2 * PI * 31000 = 194,778,744m
So the total linear distance travelled in each orbit is very different (assuming that the two heights are taken from the centre of the Earth. Which they aren't. Can't be bothered to factor in Earth's radius). So, at 7000m/s-1, the outer satellitte would take about 8 hours longer per orbit, evidently showing the relative distance would be changing, and making the targetting process much more of a challenge.
So.. presumably 7000m/s-1 is the speed of one of the satellittes (I'm guessing inner)..
PS. I think my mathes is screwy. Its early. I have no coffee.
Terrorists exist because they come from uncivilized, barbaric nations
Like the Unabomber you mean?
No matter. I have 50 karma anyway. Any else disappears into the ether.
What i want is a secret 'porn' button that i can press
There is one. But its secret.
I'm still stuck for ideas for a few people yet
Yep, think up some people to give pressies to first..
Much as we'd all like the communal aspect to be unaffected it simply isn't true. Anyone who works for a company making their co-workers redundant will tell you that they have less and less time to devote to an outside project. In simplest terms, we have less free time.
Of course, those working on OSS project who are made redundant will have much much more.. perhaps it'll balance out.
Wrong bridge. The one that sways is in London, this is 200 miles away (its quite far in the little old UK) in Newcastle. I live near this bridge. And its very impressive. Best part of it (imho) is the fact its so well balanced it only costs GBP1.30 (approx $1.8) to raise and lower it, something it does about 2 or 3 times a day.
Yeah, take out a US telco and the entire net falls down.. coz the entire net is American after all.
Still, if someone died it'd probably go respectfully quiet..
Because, simply, it would mean a surgeon wouldn't have to travel the world to operate on different people. He/She could work on someone in Paris, and then a few hours later do another operation on someone in Sydney, and then another on someone in Los Angles. Qualified surgeons are a rare bunch and the more people who have access to their skills the better..
Also, sometimes surgeons can't be there. How about operating in a war zone. Or on an astronaut in space..
Exactly the same arguements could be used for Perl..
SuzanneA .. female .. developer .. *drool* ..
heh..
Well now theres no excuse for buying it.. :)
The same thing was said 3 months ago.. :)