Re:Radiation hardening?
on
One Small Step
·
· Score: 3, Informative
Not enough radiation to worry at 100 km. The ISS is higher and doesn't have any radiation shielding AFAIK. It gets worse the higher you go, 300 km is starting to get more interesting from there the Van Allen belt goes beyond Clarke orbit (>37000 km).
No radiation hardening is needed at 100km, I don't think the Space Shuttle worries unduly over it either, and that goes higher.
I think you may find some prior art; i.e. every single patent ever
Re:Very Cool.
on
One Small Step
·
· Score: 5, Informative
This is just a small rocket to test out the control system and get experience building and controlling rocket engines; this launch vehicle uses only hydrogen peroxide.
The final system they are working on will achieve 100km altitudes (i.e. space) and return to earth with fare-paying passengers. The final launcher will also use a 'bipropellent' such as peroxide and kerosene; that gives almost twice the delta-v per kg of fuel. They've done tests with such motors, and they've achieved good results- good enough performance to achieve their goals I would think.
They're making good progress- though they thought they'd get to this point last year, but they had catalyst issues which I think are a bit better understood now; but they are ahead on other fronts.
Oh gooooood. He's accused him of a crime, and so you think he should fraudulently sign the presidents signature to get out of it? That wouldn't get the FBI to sic on him. No siree. Nice suggestion, way to go- not!;-)
I would love a flying car--a VTOL, efficient, computer-controlled flying vehicle that is no larger than a current large automobile. But I'm not going to get it, because no one can figure out how to make the darn things float when powered down.
Flying cars isn't quite the market that they're aiming for but Cartercopters look to have that problem sewn up- they don't float down; but they are designed to survive complete loss of power without any major issues, and can land in any small clearing.
Actually IRC it doesn't do this, I sniffed the packets, I don't remember any UDP. TCP and protocol 50/51 stuff but I don't think there was any UDP. Anyway, I thought the big issue was that the protocol wrapped the IP address, so the NAT messes around with the IP address and compromises the validation of the packet. So wrapping the packets further wouldn't help with this issue.
Quite a lot of systems seem to kill the protocol 50/51 packets that IPSEC uses; I haven't managed to route these packets through an XP box for example.
But I've been using Nortel's Contivity client, through 2 levels of NAT without other problems, using Mandrake 8.2 as a firewall, and that was even over wireless connections. I think there may be something clever in the Contivity client to enable this, but I may be wrong. I've never used FreeSwan, but I looked at the documentation and it seemed to suggest that it wouldn't work with multiple levels of NAT, but I haven't any hands-on experience.
No, they said they can write to the kernel memory; the kernel is the heart of the operating system. If you can make modifications to the kernel, you can usually do anything- in Linux terms: you're 'root'.
This is an extremely bad bug; VPN software is deployed to protect intranets whilst allowing machines outside to connect- often it is the only thing between an intranet and the outside world.
This is a really, really worrying thing; if an exploit rather than just a DOS exists, and they indicate that they think it probably is there, it's a huge hole in tens of thousands of firewalls worldwide.
You've always got a choice; open source, or open wallet; now you've got open firewall too, thrown in at no extra charge. Nice!
Gee, some intuition tells me you haven't read the link. Won't you look silly in front of your creationist pals? Most leading creationists admit the quote is wrong now.
As to how long it takes, well if it takes 3 million years to go from an ape of low intelligence to get to you, then... on second thoughts, never mind, bad example.
No, I don't really agree, and I have a degree in electronics, and I've studied DSPs. The sampling hardware needed isn't that special. I think that what he's doing will basically work.
There are issues- interference could be an issue, but I suspect that some filters will mostly solve the issues.
I actually think it isn't ambitious enough! He should be working on two-way comms. A software radio with beam-forming is going to be needed in the next few years; there's some theorems that if you do directional antennas, power control, routing algorithms and you can handle multiple frequencies, then the network capacity scales basically proportional to the number of users on the network. i.e. more users doesn't slow the network.
It doesn't 'keep' the boiling liquids in its body, it makes them and uses them very soon afterwards.
Anyway:
a) the rest of its body is mostly water, and hence has a very high heat capacity.
b) the boiling steam is only there for a fraction of a second
c) one trick that humans do, which is absolutely not recommended is to hold molten lead in your mouth... with no problem.
Or in another sense, yeah I'm slightly impressed, but I'm just saying the trick isn't nearly as difficult as it appears.
Anyway, I also have an interest in rocket engines which are kinda similar. It's not impossible to keep a rocket combustion chamber wall at 60C whilst the hot gas in the combustion chamber is at 3000C...
There's no great mystery; all of the chemicals are common, other beetles exist that excrete them separately; and the temperatures and pressures are not really that great (only just above boiling). So what?
I rather doubt it. A complete Soyuz- the list price is about $50 million IRC. But it actually costs about $5 million to build one. That's why Tito was able to get a launch for about $15 million- he paid for the entire thing. NASA should cut a deal.
Yeah, but you can't cook in a pot made of water. You should be able to mix this stuff up in a ceramic in the right proportions and have a ceramic that just doesn't crack at all- period. oven->ice water no problem!
By all accounts it's non toxic too. What a great material!
Richard Stallman won one of these a few years ago; and he well deserved it too. Without the GPL or the toolset he created Linux would probably have languished in obscurity like Minix did.
The Foundation neither requires nor expects specific projects from individual Fellows, nor does it ask for reports on how the money is used.
Oh what a great award;-)
Something tells me these award wouldn't necessarily be used for the kind of projects they might be expecting. "Well first I had a supermodel, then one of the Superbabes then...";-)
Then again maybe this is a kind of reverse eugenics; perhaps this IS what it's for. e.g. Richard Stallman got a girlfriend after winning this...
Only Americans wherever in the world they live do require a launch license from their govt. to get to orbit; beyond 100km USA has no jurisdiction. It's because under international law they are liable if an American's rocket kills a 3rd party.
Everyone else can do what they want pretty much. Oh yeah, except its a good idea to just tell the
American nuclear defense guys anyway so they don't think WWIII has started by mistaking you for an nuclear ICBM.
Think Judo. You don't combat something by blocking it; you twist it slightly and guide it past.
Ok, is Palladium bad? Probably if Microsoft has something to do with it. Can Linux use this tech for good? Is it a Windows only tech? Where are the factions that don't want Windows to rule all of the media? What does IBM think? Sun?
Can this really fight viruses and worms?
The real question is how can I use this to my advantage? What can we do to make this do something useful instead of merely lock up all the media in the world?
Yes, but the difference is that the bacteriophage may be able to evolve to be more effective, and fairly quickly; and we may able to help it along too. The antibiotics can't evolve, and that's the problem.
Actually, I like triclosan. It's unpretentious, and only mildly effective. Triclosan looks like one of the few good guys. It's not very effective, but effective enough. It's not harmful to humans, and there's been no known cases of evolution of bugs to beat it. Not so much scorched earth, more like gently toasted really.
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No radiation hardening is needed at 100km, I don't think the Space Shuttle worries unduly over it either, and that goes higher.
I think you may find some prior art; i.e. every single patent ever
The final system they are working on will achieve 100km altitudes (i.e. space) and return to earth with fare-paying passengers. The final launcher will also use a 'bipropellent' such as peroxide and kerosene; that gives almost twice the delta-v per kg of fuel. They've done tests with such motors, and they've achieved good results- good enough performance to achieve their goals I would think.
They're making good progress- though they thought they'd get to this point last year, but they had catalyst issues which I think are a bit better understood now; but they are ahead on other fronts.
Oh gooooood. He's accused him of a crime, and so you think he should fraudulently sign the presidents signature to get out of it? That wouldn't get the FBI to sic on him. No siree. Nice suggestion, way to go- not! ;-)
Flying cars isn't quite the market that they're aiming for but Cartercopters look to have that problem sewn up- they don't float down; but they are designed to survive complete loss of power without any major issues, and can land in any small clearing.
Just over a century ago he said:
Actually, I've seen several episodes, and they seemed to succeed more than you would expect; it's not a bad program IMO.
Actually IRC it doesn't do this, I sniffed the packets, I don't remember any UDP. TCP and protocol 50/51 stuff but I don't think there was any UDP. Anyway, I thought the big issue was that the protocol wrapped the IP address, so the NAT messes around with the IP address and compromises the validation of the packet. So wrapping the packets further wouldn't help with this issue.
But I've been using Nortel's Contivity client, through 2 levels of NAT without other problems, using Mandrake 8.2 as a firewall, and that was even over wireless connections. I think there may be something clever in the Contivity client to enable this, but I may be wrong. I've never used FreeSwan, but I looked at the documentation and it seemed to suggest that it wouldn't work with multiple levels of NAT, but I haven't any hands-on experience.
This is an extremely bad bug; VPN software is deployed to protect intranets whilst allowing machines outside to connect- often it is the only thing between an intranet and the outside world.
This is a really, really worrying thing; if an exploit rather than just a DOS exists, and they indicate that they think it probably is there, it's a huge hole in tens of thousands of firewalls worldwide.
You've always got a choice; open source, or open wallet; now you've got open firewall too, thrown in at no extra charge. Nice!
As to how long it takes, well if it takes 3 million years to go from an ape of low intelligence to get to you, then... on second thoughts, never mind, bad example.
There are issues- interference could be an issue, but I suspect that some filters will mostly solve the issues.
I actually think it isn't ambitious enough! He should be working on two-way comms. A software radio with beam-forming is going to be needed in the next few years; there's some theorems that if you do directional antennas, power control, routing algorithms and you can handle multiple frequencies, then the network capacity scales basically proportional to the number of users on the network. i.e. more users doesn't slow the network.
a) the rest of its body is mostly water, and hence has a very high heat capacity.
b) the boiling steam is only there for a fraction of a second
c) one trick that humans do, which is absolutely not recommended is to hold molten lead in your mouth... with no problem.
Or in another sense, yeah I'm slightly impressed, but I'm just saying the trick isn't nearly as difficult as it appears.
Anyway, I also have an interest in rocket engines which are kinda similar. It's not impossible to keep a rocket combustion chamber wall at 60C whilst the hot gas in the combustion chamber is at 3000C...
There's no great mystery; all of the chemicals are common, other beetles exist that excrete them separately; and the temperatures and pressures are not really that great (only just above boiling). So what?
One way to get to IPv6 I suppose... we're under attack- activate the new protocol stacks! That'll stop 'em.
By all accounts it's non toxic too. What a great material!
Not necessarily surprising- it's used in toothpaste. It's not considered harmful.
Richard Stallman won one of these a few years ago; and he well deserved it too. Without the GPL or the toolset he created Linux would probably have languished in obscurity like Minix did.
Oh what a great award ;-)
Something tells me these award wouldn't necessarily be used for the kind of projects they might be expecting. "Well first I had a supermodel, then one of the Superbabes then..." ;-)
Then again maybe this is a kind of reverse eugenics; perhaps this IS what it's for. e.g. Richard Stallman got a girlfriend after winning this...
Everyone else can do what they want pretty much. Oh yeah, except its a good idea to just tell the American nuclear defense guys anyway so they don't think WWIII has started by mistaking you for an nuclear ICBM.
Ok, is Palladium bad? Probably if Microsoft has something to do with it. Can Linux use this tech for good? Is it a Windows only tech? Where are the factions that don't want Windows to rule all of the media? What does IBM think? Sun?
Can this really fight viruses and worms?
The real question is how can I use this to my advantage? What can we do to make this do something useful instead of merely lock up all the media in the world?
Yes, but the difference is that the bacteriophage may be able to evolve to be more effective, and fairly quickly; and we may able to help it along too. The antibiotics can't evolve, and that's the problem.
Actually, I like triclosan. It's unpretentious, and only mildly effective. Triclosan looks like one of the few good guys. It's not very effective, but effective enough. It's not harmful to humans, and there's been no known cases of evolution of bugs to beat it. Not so much scorched earth, more like gently toasted really.
Now germ-line genetic engineering; now you're talking!