It's a bit of a toughie, but I think I'd go for analysis. It provides a fundamental insight into how math is done. Math is made up of three basic ingredients: analysis, geometry and algebra.
You're much more likely to understand a lot of the reasoning in other courses after you take analysis, as the logic applies much more generally than to vectors, euclidean space and differentials. Those are more examples on how to use analysis, and of course could be annoying to get through if you don't like that sort of thing.
In your non-math (ie. programming/cs) courses, you're very likely to meet graph theory, sets and so on anyway, and because you've taken analysis, you'll have much more intuition on how to use those tools.
Will people please get into their heads that if the LHC could generate an earth absorbing black hole, we would not have been around to build it. The sort of events that happen in the LHC happen in the atmosphere every day because of cosmic radiation. The LHC just takes a closer look at this process, at much lower energies than what nature can produce.
I'm tired of these wild speculations of black holes emerging from the LHC. Get over it!
A good attack on botnets would be to make them delete zombie machines owners files. Then the malware would get much more attention.
A decade ago, the mission of vira was to destroy as much as possible locally, today they use stealth to be able to send spam, earning the virus writer money.
As a rule of thumb, I've heard compiled languages beat interpreted ones by a factor of 600. Some languages, like C# and Java lands in between. They're compiled to some fictional machine which is emulated by software. I don't know where they land in this.
PHP is compiled on the fly, and IIRC you can cache the compiled output on a busy server to save quite a bit of time.
> Penetrating thermal invisibility cloaks might end up more important, because camouflage can take care of visible light from overhead, it's the thermal that's the giveaway.
This is wrong. An object is still going to emit thermal radiation approximately in accordance with Planck's radiation law. Putting an invisibility cloak around something can only work as good as putting up any other kind of heat shield.
In this light, thermal invisibility cloaks might even end up being least useful of all invisibility cloaks, because you'd just add the background radiation to your own signature.
> Yet before we gave up on phone lines, the modem builders were giving us 56,000 baud connections.
Yeah, but isn't that done by compression of data? Send the compressed data with 28 kbaud. Also if you look closely, the 56 kbaud is a theoretical upper limit, not generally met in reality.
On a phone line with only 4 kHz bandwidth, yeah, you can still only send about 28 kbaud. Today, we use "phone lines" with much larger bandwidth.
Fine, an optical disk with 1 TB storage capacity. And I think DVDs take a long time to burn.
Of course, if it's made of the same material as rewriteable DVDs there would be no need to burn an entire disc, and you could probably use it as some sort of external harddrive.
Here in Europe, we've also experienced a few cascading blackouts, triggered by single failing power plants. Blackouts throughout Denmark caused by failing power plants in middle/southern europe is not unheard of. When the power grid is so interconnected, a few failures means the capacity of the rest of the plants does not meet the demand of the grid, which in turn forces the rest of the plants to a grinding halt. A very well coordinated effort is then required to bring the grid back up.
There's probably not much to be done about this, other than perhaps segmenting the grid (making it harder so sell/buy power from other plants).
Interestingly, the grid in Denmark is naturally segmented by water. The western part of the country is connected to the central european power grid, and the eastern part is connected to the rest of the North (Sweeden etc). Because of a new tunnel under Storebelt, a (DC) powerline can help restart the northern power grid and vise versa. This was used a couple of years back after a failure of a sweedish powerplant that caused Sweeden and eastern Denmark to black out.
Ettercap: http://ettercap.sourceforge.net/ removes the need for a HUB. It uses arp table poisoning to fool your dads computer into thinking your Linux box is the router, allowing you to view all traffic.
A word of warning though: do/NOT/ use ettercap on other networks than your own, and do it behind a router. Your ISP will not think highly of you if you ARP poison the entire neighbourhood...
I would choose TwoFish over AES because TwoFish was very close to being picked as a standard, and didn't make it. That means AES gets all the attention, and "nobody" attacks TwoFish.
However, if they'd chosen TwoFish, would we today be reading about a new veakness of TwoFish, and would you have made a comment on how they should've picked AES ?
Slashdot Mirror
Tell the programmer of your application to append ".toupper()" or equivalent to the part of code that receives your input :-)
I read that as "busy crewmembers bothered with spam or unnecessary messages from NASA"
It's a bit of a toughie, but I think I'd go for analysis. It provides a fundamental insight into how math is done.
Math is made up of three basic ingredients: analysis, geometry and algebra.
You're much more likely to understand a lot of the reasoning in other courses after you take analysis,
as the logic applies much more generally than to vectors, euclidean space and differentials. Those are more examples on how to use analysis,
and of course could be annoying to get through if you don't like that sort of thing.
In your non-math (ie. programming/cs) courses, you're very likely to meet graph theory, sets and so on anyway,
and because you've taken analysis, you'll have much more intuition on how to use those tools.
Will people please get into their heads that if the LHC could generate an earth absorbing black hole,
we would not have been around to build it. The sort of events that happen in the LHC happen in the atmosphere
every day because of cosmic radiation. The LHC just takes a closer look at this process, at much lower energies
than what nature can produce.
I'm tired of these wild speculations of black holes emerging from the LHC. Get over it!
in general, 10 in a base, b, is equal to b because it is equal to 1*b^1 + 0*b^0 = b.
Try looking up the obscufated c code contest.
I love this example (mystery.c):
[Filter error: Please use fewer junk characters] (try this link instead http://www.cs.cf.ac.uk/Dave/C/node4.html#SECTION00420000000000000000)
It's legal C code. Compiling and running produces some quite extraordinary output.
Fix the botnet so it deletes the user files. That ought to turn mr. stupids attention to keeping his computer clean of malware.
A good attack on botnets would be to make them delete zombie machines owners files.
Then the malware would get much more attention.
A decade ago, the mission of vira was to destroy as much as possible locally,
today they use stealth to be able to send spam, earning the virus writer money.
As a rule of thumb, I've heard compiled languages beat interpreted ones by a factor of 600.
Some languages, like C# and Java lands in between. They're compiled to some fictional machine
which is emulated by software. I don't know where they land in this.
PHP is compiled on the fly, and IIRC you can cache the compiled output on a busy server to save
quite a bit of time.
> Penetrating thermal invisibility cloaks might end up more important, because camouflage can take care of visible light from overhead, it's the thermal that's the giveaway.
This is wrong.
An object is still going to emit thermal radiation approximately in accordance with Planck's radiation law.
Putting an invisibility cloak around something can only work as good as putting up any other kind of heat shield.
In this light, thermal invisibility cloaks might even end up being least useful of all invisibility cloaks,
because you'd just add the background radiation to your own signature.
It turns out to be just about 1.21 jiggawatts.
1 TeV is about 1.21 GW
> Yet before we gave up on phone lines, the modem builders were giving us 56,000 baud connections.
Yeah, but isn't that done by compression of data? Send the compressed data with 28 kbaud.
Also if you look closely, the 56 kbaud is a theoretical upper limit, not generally met in reality.
On a phone line with only 4 kHz bandwidth, yeah, you can still only send about 28 kbaud.
Today, we use "phone lines" with much larger bandwidth.
> No, "high temperature" superconductors cannot be used in magnets.
[citation needed]
Fine, an optical disk with 1 TB storage capacity. And I think DVDs take a long time to burn.
Of course, if it's made of the same material as rewriteable DVDs there would be no need to burn an entire disc, and you could probably use it as some sort of external harddrive.
> I'm not sure about you, but I have not had much success getting libusb-win32 to work with x64.
Luckily the source is available, along with free and open source compilers for Windows.
Extra points for sending the compiled binaries to the project.
Try TiLP 2. Made by said TI-homebrew community.
Here in Europe, we've also experienced a few cascading blackouts, triggered by single
failing power plants. Blackouts throughout Denmark caused by failing power plants
in middle/southern europe is not unheard of. When the power grid is so interconnected, a few
failures means the capacity of the rest of the plants does not meet the demand of the grid,
which in turn forces the rest of the plants to a grinding halt. A very well coordinated effort is then required
to bring the grid back up.
There's probably not much to be done about this, other than
perhaps segmenting the grid (making it harder so sell/buy power from other plants).
Interestingly, the grid in Denmark is naturally segmented by water. The western part of the country
is connected to the central european power grid, and the eastern part is connected to the rest of the North (Sweeden etc).
Because of a new tunnel under Storebelt, a (DC) powerline can help restart the northern power grid and vise versa.
This was used a couple of years back after a failure of a sweedish powerplant that caused Sweeden and eastern Denmark
to black out.
So, TKIP broken, not AES. Wonder if the WEP AES implementation is broken somehow ?
> 2) Plug the router into this HUB
Ettercap: http://ettercap.sourceforge.net/ removes the need for a HUB.
It uses arp table poisoning to fool your dads computer into thinking your Linux box
is the router, allowing you to view all traffic.
A word of warning though: do /NOT/ use ettercap on other networks than your own,
and do it behind a router. Your ISP will not think highly of you if you ARP poison the
entire neighbourhood...
> They should have picked TwoFish.
I would choose TwoFish over AES because TwoFish was very close to being picked as a standard,
and didn't make it. That means AES gets all the attention, and "nobody" attacks TwoFish.
However, if they'd chosen TwoFish, would we today be reading about a new veakness of TwoFish,
and would you have made a comment on how they should've picked AES ?
I live in a dorm room with absolutely no way of putting up any wire anywhere.
73 de OZ7LNX
Seeing the discussion here, I wonder why nobody has brought this up yet:
http://xkcd.com/526/
Perhaps he reserves mydomain.com for future purposes?
http_redirect("profile.mydomain.com");