Re:Gyroscopic stabilizers
on
Rocket Men
·
· Score: 1
I'm not sure they've actually conducted a fullly autonomous test. According to their web site, they've only done very limited tethered tests.
Actually, this post from almost 2 1/2 years ago (June 15, 2004), has a video with one of the more amazing technology demonstrations I've seen in rocketry ever. AIUI, the entire flight shown is autonomous from the time of liftoff to the time of landing. The engine warmup was done manually, but the flight was all done by computer.
...snip...
The flight parameters were set for 1.8 seconds of boost, -4 m/s^2 minimum acceleration (slightly more than negative one half G) during the stabilization phase, 3 m/s^2 acceleration in the landing phase, 1 m/s target touchdown velocity, and a 3 m uncertainty margin for the GPS altitude. I increased the minimum acceleration during stabilization because of concerns about throttling the ball valve at small open fractions and low chamber pressures. This wastes more propellant during the flight, but this vehicle can carry so much more propellant than we can use without our burn time waiver that it doesn't really matter.
The flight was perfect. It went 131 feet high, and landed less than one foot from the launch point.
The auto-land worked perfectly. I had tried several algorithms on the simulator before settling on this one, and it behaved exactly the same in reality, which is always a pleasant surprise.
So, the question becomes, how much torque is required to turn the spindle (is it the stator?), and then how big of a turbine engine do you need to spin the generator at 500,000 RPM?
Dunno about power requirements, but here's a wikipedia page on the Siemens trains they use. The first ones were Bombardier, evidently. Here's a page on the MAX. The things you find about your home town...
Craps: You throw the dice and they never land. Blackjack: The dealer throws out a card and it keeps spinning in the air. Roulette: Might work. It will just be a while before the wheel spins down.
That the area of a triangle inscribed in a circle is equal to the product of its three sides divided by four times the circles radius is a physical fact...
Only for perfectly flat space. In reality, all space is curved even if by just a little bit.
So your argument is with the physical fact part and not the rest, right? The description of the method for determining the area of a triangle is indeed fact where mathematics is concerned. Math, when applied to the real world, loses a certain amount of its effectiveness. We humans, in our rush to convenience, accept a certain amount of data loss, such as that imposed by the curve of space you mention.
Also, an apple is an apple; it also happens to be a collection of atoms of various types, but we've agreed that it's an apple, whether it's a Red Delicious or Gala, large or small, or even with or without worms in it. In this fashion we describe objects in our universe, even people and trolls. So, given an object that is somehow manageable in size, no matter its makeup, we can create collections of them (you know, those atoms are really only collections of certain types of protons, electrons, etc.), and then describe collections of those collections, such as a bushel of apples.
And now, speaking of going about one's business, I think I'll do that, having applied my management capability to the screen you're now looking at, causing it to throw certain photonic particles at that collection of atoms you call visual receptors or eyes or whatever, which really only change the photonic energy into electrical signals, inducing chemical changes (collections of atoms, called molecules, get together and form other collections called chemicals, which are deposited in that collection of various other chemicals you refer to as a brain...). Oh, I am so done here.
Is that to say that the additive property of integers exists only because we've defined integers to be what they are? Seems reasonable to me. It makes me wonder how things would be different if we had (or even could have) decided to conceive of things in real numbers always.
Yeah, but did they factor in the idea that it could be the tailpipe of some alien spaceship heading away from us using some technology we're not aware of because we're too stupid to be useful and therefore scheduled for destruction to put in an interstellar bypass?
I can't check this out before I get home (IE at work and all), and maybe it's already added, but speaking of scrolling down, how about a link next to [Parent] that is the next comment down on the same level (possibly [Next Younger Brother], though that's a little unwieldly)? Alternately, how about "rollup" for a particular comment and its children? Take, for example, the discussion above regarding IE compatibility. I had read TFBlurb and noted that, indeed, IE compatibility was on the hot list. I didn't care to read all the posts from people afraid it was going to go away, then all the posts from people reviling them for not reading TFB. I had to scroll down, keeping a mental track of where the indentation was for the parent comment, looking for the next thing that someone said. Terribly bothersome, I tell you.
Much more difficult than any of that for the average corporate Joe is to get approval to install anything but IE as a browser on their desktop machine. A lot of folks don't even have the rights to install any software at all on their machines.
I misread the headline to be "Flickr Launches Drag and Drop Ghettotagging", which induced a doubletake. Seriously, anything that makes it easy for people to tag blocks of data will do wonders for search, boobies included.
I'd take Kurt Russel any day over RDA for the O'Neil role. I just never believed RDA as the distraught guy who grudgingly comes out of retirement to do this amazing thing. RDA does pissy really well, but Russell has the angst thing down.
I think Spader vs. Shanks make a much closer match. At this point, I think Shanks has so much more experience with the character and the storyline that he would do a better job.
I watched "200" the other night. At the end, when the producer guy said, "Hey, everyone, the movie's on!" I took that as an indicator that there was a new Stargate movie in the works.
I went out and bought the Microsoft wireless keyboard/mouse set for my new iMac yesterday, only to get it home and discover that it's not Bluetooth. I'm fairly certain that I'm returning it. I don't much care for the Apple keyboard. The mouse is cool, except that the scroll ball could be bigger. Anyhow, it didn't make sense to me to have this nice, mostly cordless iMac just to add a corded dongle to run my keyboard and mouse. I might as well keep the corded ones I have.
Look into jobs at utility companies. There's a lot of math that goes into predicting how much power, natural gas, etc. that will get used in the next hour/day/month/year so that appropriate load values can be purchased. Also, look to insurance companies. I've got a friend that's a math major, and she's studying for a certificate in actuarial accounting while working for a large insurance company. In either case, wages are about what you'd expect to get in the computer field.
Joking aside, there are a few shows that have fizzled due to poor timing more than anything else. Slashdot should run a poll on what pilot or short-run show should be revived. There was a family comedy/drama of sorts called "The Days", and of course what ever happened to "Sports Night"? And, of course, "Firefly". Oh, for more Firefly...
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Actually, this post from almost 2 1/2 years ago (June 15, 2004), has a video with one of the more amazing technology demonstrations I've seen in rocketry ever. AIUI, the entire flight shown is autonomous from the time of liftoff to the time of landing. The engine warmup was done manually, but the flight was all done by computer.
When you answer, you try and create complete answers that are useful to everyone reading it...
As someone said before, you must be thinking of the other Slashdot.
So, the question becomes, how much torque is required to turn the spindle (is it the stator?), and then how big of a turbine engine do you need to spin the generator at 500,000 RPM?
Dunno about power requirements, but here's a wikipedia page on the Siemens trains they use. The first ones were Bombardier, evidently. Here's a page on the MAX. The things you find about your home town...
I think he meant overhead lines for buses, trolleys, etc.
Then there's these guys. Anyone know what they're up to? "Vicadin match?"
It doesn't take much to get the pertinent information, seeing as how they publish it on their website.
Right.
Craps: You throw the dice and they never land.
Blackjack: The dealer throws out a card and it keeps spinning in the air.
Roulette: Might work. It will just be a while before the wheel spins down.
That the area of a triangle inscribed in a circle is equal to the product of its three sides divided by four times the circles radius is a physical fact...
Only for perfectly flat space. In reality, all space is curved even if by just a little bit.
So your argument is with the physical fact part and not the rest, right? The description of the method for determining the area of a triangle is indeed fact where mathematics is concerned. Math, when applied to the real world, loses a certain amount of its effectiveness. We humans, in our rush to convenience, accept a certain amount of data loss, such as that imposed by the curve of space you mention.
Also, an apple is an apple; it also happens to be a collection of atoms of various types, but we've agreed that it's an apple, whether it's a Red Delicious or Gala, large or small, or even with or without worms in it. In this fashion we describe objects in our universe, even people and trolls. So, given an object that is somehow manageable in size, no matter its makeup, we can create collections of them (you know, those atoms are really only collections of certain types of protons, electrons, etc.), and then describe collections of those collections, such as a bushel of apples.
And now, speaking of going about one's business, I think I'll do that, having applied my management capability to the screen you're now looking at, causing it to throw certain photonic particles at that collection of atoms you call visual receptors or eyes or whatever, which really only change the photonic energy into electrical signals, inducing chemical changes (collections of atoms, called molecules, get together and form other collections called chemicals, which are deposited in that collection of various other chemicals you refer to as a brain...). Oh, I am so done here.
Is that to say that the additive property of integers exists only because we've defined integers to be what they are? Seems reasonable to me. It makes me wonder how things would be different if we had (or even could have) decided to conceive of things in real numbers always.
Ooohh... I just made my head hurt.
Yeah, but did they factor in the idea that it could be the tailpipe of some alien spaceship heading away from us using some technology we're not aware of because we're too stupid to be useful and therefore scheduled for destruction to put in an interstellar bypass?
I bet not!
Are you crazy? Then they'd stand out as being productive among their peers, making them reviled by everyone except their PHB. No one wants that.
I can't check this out before I get home (IE at work and all), and maybe it's already added, but speaking of scrolling down, how about a link next to [Parent] that is the next comment down on the same level (possibly [Next Younger Brother], though that's a little unwieldly)? Alternately, how about "rollup" for a particular comment and its children? Take, for example, the discussion above regarding IE compatibility. I had read TFBlurb and noted that, indeed, IE compatibility was on the hot list. I didn't care to read all the posts from people afraid it was going to go away, then all the posts from people reviling them for not reading TFB. I had to scroll down, keeping a mental track of where the indentation was for the parent comment, looking for the next thing that someone said. Terribly bothersome, I tell you.
Much more difficult than any of that for the average corporate Joe is to get approval to install anything but IE as a browser on their desktop machine. A lot of folks don't even have the rights to install any software at all on their machines.
I misread the headline to be "Flickr Launches Drag and Drop Ghettotagging", which induced a doubletake. Seriously, anything that makes it easy for people to tag blocks of data will do wonders for search, boobies included.
The only thing "incredible" about that "Stephen Colbert impersonation" is how bad it was.
It doesn't seem to be working right now.
I'd take Kurt Russel any day over RDA for the O'Neil role. I just never believed RDA as the distraught guy who grudgingly comes out of retirement to do this amazing thing. RDA does pissy really well, but Russell has the angst thing down.
I think Spader vs. Shanks make a much closer match. At this point, I think Shanks has so much more experience with the character and the storyline that he would do a better job.
Not to be nitpicky, but it's "Chrichton." I hate to exhibit fanboy-ism, but I also don't like misspellings (particularly when I do it), so I'm torn.
I watched "200" the other night. At the end, when the producer guy said, "Hey, everyone, the movie's on!" I took that as an indicator that there was a new Stargate movie in the works.
Ben Browder and Claudia Black will have reputations as show killers from here on out.
I went out and bought the Microsoft wireless keyboard/mouse set for my new iMac yesterday, only to get it home and discover that it's not Bluetooth. I'm fairly certain that I'm returning it. I don't much care for the Apple keyboard. The mouse is cool, except that the scroll ball could be bigger. Anyhow, it didn't make sense to me to have this nice, mostly cordless iMac just to add a corded dongle to run my keyboard and mouse. I might as well keep the corded ones I have.
Look into jobs at utility companies. There's a lot of math that goes into predicting how much power, natural gas, etc. that will get used in the next hour/day/month/year so that appropriate load values can be purchased. Also, look to insurance companies. I've got a friend that's a math major, and she's studying for a certificate in actuarial accounting while working for a large insurance company. In either case, wages are about what you'd expect to get in the computer field.
This guy just needs another hot water bottle or two and he's able to go a long ways.
Joking aside, there are a few shows that have fizzled due to poor timing more than anything else. Slashdot should run a poll on what pilot or short-run show should be revived. There was a family comedy/drama of sorts called "The Days", and of course what ever happened to "Sports Night"? And, of course, "Firefly". Oh, for more Firefly...