for student lawyers. Sue to have shitty patents overturned (on behalf of the US public or w/e) where you have no chance of loosing. Big plus on your resume. USPTO should solicit public expertise. Post the patent application on the website and ask for prior art etc. Additionally, if a patent is found to be grossly invalid, the examiner who granted it should be held accountable. Maybe investigated for corruption and/or incompetence.
Ok, I think I know what you're trying to do. You want to enter an elliptical orbit with perigee inside GEO and apogee outside GEO so that it intersects GEO at two points. Confirm/Deny?
You can go up and down......WTF do you think you do to start a Holman transfer?
You accelerate perpendicular to gravity. Here, read This. Look at the diagram.
I should have done the math properly: To move from GEO to GEO - 100km, you need:
sqrt(earth geopotential/42164km)*(sqrt(2*42064km/(42164km+42064km))-1) = -1.8257 m/s and
sqrt(earth geopotential/42064km)*(1-sqrt(2*42164km/(42164km+42064km))) = -1.8268 m/s
To get back to GEO you need
sqrt(earth geopotential/42064km)*(sqrt(2*42164km/(42164km+42064km))-1) = +1.8268 m/s and
sqrt(earth geopotential/42164km)*(1-sqrt(2*42064km/(42164km+42064km))) = +1.8257 m/s for a total delta-v of 7.305 m/s.
CP/M was a loader and a file system. It was like a home computer BASIC environment without the BASIC. Vista would have to be a lot better to be mediocre.
To get from one point on an orbit to another point on the orbit you can both slow down and oppose the acceleration due to gravity by going "up" and getting pulled "down" over time after the burn.
I didn't want to do the math, but I suppose it's the easiest way. Ok, you thrust to reduce velocity and thrust upwards to compensate for gravity pulling you down. The length of GEO is about 265,000km. If you slowed yourself by 5m/s (half of my rather extravagant budget) it would take 307 days to go 180 degrees. That's 307 days you have to accelerate an average of 1.456 x 10^-3 m/s^2 away from the earth for a total of 38.62km/s. This is enough for a mars landing and back. Add another 5m/s to get back up to speed. If you don't thrust away from the earth, gravity pulls you down. This isn't a problem, because when you thrust to speed up again, you'll come right back up. Again: -2.5m/s to go into an elliptical orbit, -2.5m/s again at perigee to go into a circular orbit at GEO - 100km, wait until you're 1/2 orbit from where you want to be, +2.5m/s to go into an elliptical orbit and at apogee you will be exactly were you want to be, going in the direction you want to be going, and 2.5m/s too slow. +2.5m/s. So your choice: 38,630m/s or 10m/s?
You have no idea how this works do you? The "information format" doesn't need to be cracked. It's public knowledge. Each chip has an Endorsement Key. It is unique and random. It is also known by a sort of certificate authority. You can't "create" an identity without attacking the CA. EKs never leave the TPM, so the only way you can get an "already out" identity is to steal the TPM, decapsulate it and probe it. This is an extremely expensive endeavour for just one key. If you've hacked the authorization servers of a sensitive service, you already have the gold. That's like saying "if you have root, you can install a rootkit and get root."
For privacy, Direct Anonymous Attestation is now used. When the TPM is initialized, it generates an Attestation Identity Key. A DAA issuer, which has a list of all issued EKs, verifies that you have an EK and therefore a valid TPM. It then gives you a credential. With the credential and a Zero Knowledge Proof, you can prove you have a valid EK to a DAA verifier without revealing the EK. The DAA verifier then signs your AIK. The DAA issuer knows your EK and the DAA verifier knows your AIK, but neither know who you are, so they can't match them together.
The TPM is passive and can't do any checking on it's own. The first thing that does any verification is the Core Root of Trust Measurement, Which resides in the BIOS Boot Block. The CRTM is supposed to measure (verify) itself and the BIOS proper, then execute the BIOS. If you hack the CRTM, isn't the whole thing hosed? You can report any combination of hardware and software you like.
I would have thought it would be obvious that the computer the robot is typing on is "trusted". Yes, my computer has a TPM. It's disabled by default, can only be initialized from the BIOS and can be cleared and reinitialized at any time.
What are you going to use to transfer the data with? Existing internet infrastructure?
As long as there's something you can use to send and receive data, you can tunnel. In the absolute extreme, you can build a physical robot that types packets into twitter messages on a keyboard.
you are not even grasping the concept of rotation and are only thinking of fixed circles
What, you're reading my mind now? Fixed circles? what gave you that idea?
You don't just step from one orbit to another without passing through intervening space
If you're in a circular orbit, simply increasing or decreasing your velocity will put you in an elliptical orbit with perigee or apogee at your current position. If you're in an elliptical orbit, increasing your velocity at apogee or decreasing your velocity at perigee can put you in a circular orbit.
there is no need to waste fuel moving into a different circular orbit and getting out of it again
It's not wasting fuel. Fighting gravity is wasting fuel.
(4 burns with your idea if you think about it - you can't get the change in velocity for free)
The amount of propellant expended has nothing to do with the number of burns. It has everything to do with the total change in velocity, which is about 10m/s for a 100km difference. In reality, you can get away with a lot less than that.
it's not going to be trivial amounts of fuel for large changes in angle.
That's why no one does that. Satellites don't even have enough thrust to do that.
...no free ride anywhere apart from down.
Ok, I think I've got it. This is wrong, There's no free ride anywhere, not even down. If you're not going fast enough for a circular orbit at your altitude, you are pulled toward the earth by gravity. Your altitude is falling, but your velocity is increasing. Eventually you reach a point where your velocity is too high for a circular orbit at your altitude, and you go flying out into space again. This is an elliptical orbit. The ellipse isn't centred on the earth, the earth is at one of the foci.
The problem right now is that demand is outstripping supply by a long shot. The US government started hoarding helium in 1925 in anticipation of building airships. Helium is a byproduct of natural gas mining, which would be done regardless of helium demand. The US intends to sell off all the helium it collected from 1925 to 1996 by 2015.
Interesting to note is that since helium is found in natural gas deposits, natural gas is mostly mined in the United States and the US stopped exporting helium, helium became very expensive everywhere else, so the designers of the Hindenburg were forced to use hydrogen.
The difference with ships is that you need a giant dock full of cranes to load them. To load a container onto a balloon, you simply land on it. The difference between loading ballast and cargo becomes a short detour. I don't think it would cost very much to be worth it.
I know what NASA does and that's not it. From the top: I'm in orbit 100km lower than GEO. My angular velocity is higher than objects in GEO and on the earth's surface. If I look down, I see that I'm moving eastward relative to the surface of the earth. When I'm over the point I want to be, I move back into GEO. The delta V required is about 10m/s.
Slashdot Mirror
for student lawyers. Sue to have shitty patents overturned (on behalf of the US public or w/e) where you have no chance of loosing. Big plus on your resume. USPTO should solicit public expertise. Post the patent application on the website and ask for prior art etc. Additionally, if a patent is found to be grossly invalid, the examiner who granted it should be held accountable. Maybe investigated for corruption and/or incompetence.
You can go up and down... ...WTF do you think you do to start a Holman transfer?
You accelerate perpendicular to gravity. Here, read This. Look at the diagram.
I should have done the math properly: To move from GEO to GEO - 100km, you need:
sqrt(earth geopotential/42164km)*(sqrt(2*42064km/(42164km+42064km))-1) = -1.8257 m/s and
sqrt(earth geopotential/42064km)*(1-sqrt(2*42164km/(42164km+42064km))) = -1.8268 m/s
To get back to GEO you need
sqrt(earth geopotential/42064km)*(sqrt(2*42164km/(42164km+42064km))-1) = +1.8268 m/s and
sqrt(earth geopotential/42164km)*(1-sqrt(2*42064km/(42164km+42064km))) = +1.8257 m/s for a total delta-v of 7.305 m/s.
A small office chair rotated clockwise about 120 degrees and back about 30.
CP/M was a loader and a file system. It was like a home computer BASIC environment without the BASIC. Vista would have to be a lot better to be mediocre.
To get from one point on an orbit to another point on the orbit you can both slow down and oppose the acceleration due to gravity by going "up" and getting pulled "down" over time after the burn.
I didn't want to do the math, but I suppose it's the easiest way. Ok, you thrust to reduce velocity and thrust upwards to compensate for gravity pulling you down. The length of GEO is about 265,000km. If you slowed yourself by 5m/s (half of my rather extravagant budget) it would take 307 days to go 180 degrees. That's 307 days you have to accelerate an average of 1.456 x 10^-3 m/s^2 away from the earth for a total of 38.62km/s. This is enough for a mars landing and back. Add another 5m/s to get back up to speed. If you don't thrust away from the earth, gravity pulls you down. This isn't a problem, because when you thrust to speed up again, you'll come right back up. Again: -2.5m/s to go into an elliptical orbit, -2.5m/s again at perigee to go into a circular orbit at GEO - 100km, wait until you're 1/2 orbit from where you want to be, +2.5m/s to go into an elliptical orbit and at apogee you will be exactly were you want to be, going in the direction you want to be going, and 2.5m/s too slow. +2.5m/s. So your choice: 38,630m/s or 10m/s?
Why does it need 4 NXT bricks? Do they not have enough I/O? Maybe there's a market for an NXT port expander.
Fuck you, I'm a dragon!
If the manual touch-up bits could be automated, this is just about everything augmented reality is supposed to be.
You have no idea how this works do you? The "information format" doesn't need to be cracked. It's public knowledge. Each chip has an Endorsement Key. It is unique and random. It is also known by a sort of certificate authority. You can't "create" an identity without attacking the CA. EKs never leave the TPM, so the only way you can get an "already out" identity is to steal the TPM, decapsulate it and probe it. This is an extremely expensive endeavour for just one key. If you've hacked the authorization servers of a sensitive service, you already have the gold. That's like saying "if you have root, you can install a rootkit and get root."
For privacy, Direct Anonymous Attestation is now used. When the TPM is initialized, it generates an Attestation Identity Key. A DAA issuer, which has a list of all issued EKs, verifies that you have an EK and therefore a valid TPM. It then gives you a credential. With the credential and a Zero Knowledge Proof, you can prove you have a valid EK to a DAA verifier without revealing the EK. The DAA verifier then signs your AIK. The DAA issuer knows your EK and the DAA verifier knows your AIK, but neither know who you are, so they can't match them together.
...hashes or whatever...
Whatever indeed. I have no idea what you're trying to say.
The Amiga 1000 was released in July 1985. The 500 was a cost cut version.
Ok, this is how it works:
(Eve represents some random website)
Eve: Tell me who you are.
Alice: Go fuck yourself.
(Bob represents Alice's company's VPN)
Bob: Tell me who you are.
Alice: I'm Alice.
Bob: Prove it.
Alice: Hey, TPM: Who am I?
Alice's TPM: Yeah, she's Alice.
Bob: Cool beans.
The TPM is passive and can't do any checking on it's own. The first thing that does any verification is the Core Root of Trust Measurement, Which resides in the BIOS Boot Block. The CRTM is supposed to measure (verify) itself and the BIOS proper, then execute the BIOS. If you hack the CRTM, isn't the whole thing hosed? You can report any combination of hardware and software you like.
TPM enables you to prove your identity. It can't force anything.
Here.
I would have thought it would be obvious that the computer the robot is typing on is "trusted". Yes, my computer has a TPM. It's disabled by default, can only be initialized from the BIOS and can be cleared and reinitialized at any time.
TPM doesn't allow remote control.
In the beginning it will be like that, but I think this is the first step to bona fide space factories: melting down old bikes and making new ones.
What are you going to use to transfer the data with? Existing internet infrastructure?
As long as there's something you can use to send and receive data, you can tunnel. In the absolute extreme, you can build a physical robot that types packets into twitter messages on a keyboard.
you are not even grasping the concept of rotation and are only thinking of fixed circles
What, you're reading my mind now? Fixed circles? what gave you that idea?
You don't just step from one orbit to another without passing through intervening space
If you're in a circular orbit, simply increasing or decreasing your velocity will put you in an elliptical orbit with perigee or apogee at your current position. If you're in an elliptical orbit, increasing your velocity at apogee or decreasing your velocity at perigee can put you in a circular orbit.
there is no need to waste fuel moving into a different circular orbit and getting out of it again
It's not wasting fuel. Fighting gravity is wasting fuel.
(4 burns with your idea if you think about it - you can't get the change in velocity for free)
The amount of propellant expended has nothing to do with the number of burns. It has everything to do with the total change in velocity, which is about 10m/s for a 100km difference. In reality, you can get away with a lot less than that.
it's not going to be trivial amounts of fuel for large changes in angle.
That's why no one does that. Satellites don't even have enough thrust to do that.
...no free ride anywhere apart from down.
Ok, I think I've got it. This is wrong, There's no free ride anywhere, not even down. If you're not going fast enough for a circular orbit at your altitude, you are pulled toward the earth by gravity. Your altitude is falling, but your velocity is increasing. Eventually you reach a point where your velocity is too high for a circular orbit at your altitude, and you go flying out into space again. This is an elliptical orbit. The ellipse isn't centred on the earth, the earth is at one of the foci.
The problem right now is that demand is outstripping supply by a long shot. The US government started hoarding helium in 1925 in anticipation of building airships. Helium is a byproduct of natural gas mining, which would be done regardless of helium demand. The US intends to sell off all the helium it collected from 1925 to 1996 by 2015.
Interesting to note is that since helium is found in natural gas deposits, natural gas is mostly mined in the United States and the US stopped exporting helium, helium became very expensive everywhere else, so the designers of the Hindenburg were forced to use hydrogen.
The difference with ships is that you need a giant dock full of cranes to load them. To load a container onto a balloon, you simply land on it. The difference between loading ballast and cargo becomes a short detour. I don't think it would cost very much to be worth it.
How do you stop?
I know what NASA does and that's not it. From the top: I'm in orbit 100km lower than GEO. My angular velocity is higher than objects in GEO and on the earth's surface. If I look down, I see that I'm moving eastward relative to the surface of the earth. When I'm over the point I want to be, I move back into GEO. The delta V required is about 10m/s.
Because people think quarters, not decades.