As a star accelerates away, the red shift becomes more pronounced. This is gravity neutral, so the wind is irrelevant in this case (gravity doesn't slow light; it just bends it; light at a black hole, for example, is traveling at its normal ~300Mm/s, but in very tight circles around the singularity (theoretically)).
See, the doppler effect is dependant on speed. Since acceleration is change in speed, it causes the shift to increase. We can tell the universe is accelerating outward because of the speed at which spectra shift.
Now, on to the police car version: If the 5mph is away from you, you may be unlikely to hear the police car; the compression waves emitted by its siren may (depending on how loud it is and how long the tunnel is) be overcome by the movement of the air it's compressing. At the very least, the siren would be quieter.
If it's travelling towards you, the siren would be louder.
I'm unsure of how the wind would affect the pitch of the siren, but I can guess it would cause the waves to behave much in the same way as doppler, since the transverse waves would be coming at you at faster or slower rates.
On to "Dark Matter". It doesn't exist as is found in popular sci-fi. Dark matter is an all-encompassing term for stuff we can't see, whether by radio emissions or by telescope. There's a lot we can't see. Truth be told, our idea of the mass of the universe is based on using what we CAN see as a statistical sample, and an estimate as to the extent of the universe, using its known age and acceleration rate as a guide. 'Dark matter' just makes up the difference between that estimate and the mass the universe should have, mathematically speaking, to give us our observed data.
We can't see it, yet we know it's there. So it's dark. Get it?
That's not to say it's some extraordinary form of matter (though theoretical physicists, astronomers, and sci-fi writers love to play with odd matter ideas). It could be something as lame as an inordinate number of accretion discs and non-emitting bodies. It could be black holes or MECOs. We just don't have the data.
To paraphrase the Hitchhiker's Guide, the universe is big. I mean really, mind-bogglingly big. As such, cataloguing all its macroscopic contents (i.e. stars, planets, etc) is going to take a while longer than a run down to the chemist's.
Actually, red/blue shift is only about relative speed, and is a function of the doppler effect.
If you accelerate towards an object at relativistic speeds (anything above, say 10% c), it becomes bluer. This is because the light waves are coming to you at a faster rate than they would if you were a static distance from the object. Similarly, as you accelerate away, it becomes redder.
How does this apply to stars, and how does it help us find out the speed at which they're traveling relative to us?
Say the spectra lines from a star are like this:
| | | | | Well, none of the spectra patterns you know of match up, but if you move it to the right by an amount (shift it to the blue), it matches up exactly with the spectra pattern for a hydrogen burning yellow star:
| | | | | Because of this, we know that the star is hydrogen burning and is moving away from us. The amount of the shift tells us just how fast; you can calculate it in much the same way doppler radar calculates how clouds move in a weather pattern.
It's called 'Red Shift' because its spectra pattern has been shifted towards the red.
A simpler experiment. Go commit a crime. Wait for a police car to fly by, sirens blaring. The pitch of the siren changes as it approaches and moves past, yes? As you're handcuffed, you may think to yourself how, because of the spectral analysis you do in your head, as well as the simple pattern recognition, you knew immediately that not only was it the fuzz, and that you should get the hell outta there.
But, like the good student you are, you stayed and completed your lesson. Hooray for science! I'll see you in 10-15.
But at the very least, biologists and organic chemists share and incorporate information readily. They have to; the connection between the disciplines is obvious.
The connection between astronomy and plasma physics wasn't until we figured out what stars were made from.
Well, think about it. Organized crystal structures form much more readily in low-gravity, and an impact event (two asteroids violently meeting in the black) could easily produced the sort of initial chaos needed to allow for a life-formation event (formation of amino acids and proteins as the rocks cool). Smash that into the earth, and you have a similar situation. I wouldn't be surprised if an impact event is the catalyst for life on those planets which can support it.
Before people start getting uppity about silicon-based life and how it could exist on a very hot planet, keep this in mind: Yes, silicon organics are possible and have been synthesized - but what would they use instead of water? In order to be as flexible as carbon organics, they have to be much hotter (> 100C), so there is a need for a liquid that handles those temperatures with similar properties (Anyone know the properties of Li2S?)
I submit that it is no accident that earth life is carbon-based. Lower energies needed to remain pliable and adaptable at the molecular level, and it just happens to be the most promiscuous atom to be found (can handle four covalent bonds and links up far more rapidly to the next-best, silicon).
I think if we're going to find life out there, we should be looking for a planet with similar heat characteristics to earth, with an asteroid belt or cometary system that would cause likley impacts every hundered thousand years or so (often enough to produce many many high-energy impact events to stir things up enough to form life, but not often enough to kill all life before it's got a chance to go multicellular)
I mean, once you're in our temperature range, water's a no brainer. Just captured solar wind over the millenia may be enough hydrogen to allow enough water to accrete on a planetoid (especially if there's enough oxygen in the planetoid's original mass-mix).
Limewire is one of 13 different compatible implementations of Gnutella - none of which require a server or other organization to run the network. The RIAA may try, but attacking Limewire will get them even less in the way of results than attacking Napster or Kazaa.
http://www.gnutelliums.com/windows/ has a list of all the other Gnutella clients for Windows.
The real shame here is that OS-X's only other real searchable filesharing option is Phex - which, if I remember correctly is on the slow side.
Now, theoretically, Cedega and Cider will share a certain amount of common code base. Does this mean that one day, in the far-flung future, Cedega will be actually worth paying for?
Without people and their interactions, there is no reason for the story.
Now, mind you, they did a bad job of integrating the personal stuff with the action stuff (BSG does a DAMNED good job of this), but it was the first good step in the direction of humanistic sci-fi.
I actually think the world is ready for some Heinlein-book based movies at this point - though, I hope they won't be torn to shreds like 'Starship Troopers' was.
No, seriously. 'The Moon is a Harsh Mistress' would make great a politico-sci-fi film.
Acting so bad it was too painful to watch. Writing that, while interesting as a long-term plot line, was cheesy as hell if you got close enough to smell it.
Sorry. Tried watching it recently. Thought, "I was just a teen when it was on. It couldn't be that bad if so many of my peers love it." Couldn't do it. Couldn't sit through the woodenness. Couldn't handle the small-scale cheese.
If you were your age now, and introduced to the original series as an adult with no prior Star Trekkiness, you, like me, would be under the impression that it sucked bad.
Lousy acting, lame plots, almost no finish. Sorry, but it simply doesn't live up to today's standards.
I thought DS9 was the gem in the group, but almost no one agrees there; oddly, some geeks just can't handle a coherent plot.
Check out the man page for mplayer/mencoder. It will decrypt and transcode a DVD in one step (if you give the right command line - usually an exceedingly long one.
Not feeling the command line? Well, one of these [ http://www.mplayerhq.hu/design7/projects.html ] should help.
I don't know about VLC, but in mplayer, if you're using the svga or vesa driver, or you're using the x11/xv driver with a generic X video driver, VLC doesn't antialias; it'd be too slow.
So, run xconf (or some similar video autodetection util), and ensure VLC is using its equivalent of the x11/xv driver. Or OpenGL, if you got it.
I don't see what your problem with linspire is. What you're paying for is time savings, essentially. You're paying $99 for a system that doesn't need much anything in the way of setup, and another $99 per year for guaranteed-working builds of free software (something I've found is lacking in the wikiality of community-assembled builds of OSS).
Usually, linux needs careful configuration to get it working well, and when it's done, it works better than anything else. But it takes time and patience.
Not dissing OSS or anything, but the QC is great with Linspire. I don't use it, but I understand what they are charging for.
No one but zealots use OSS exclusively. If you do, you're very limited in what you can access.
Hell, the first thing I do when I install linux is get Flash, Java, Acrobat, the MPlayer windows codec pack, and the 300M archive of freeware and MS universal accessibility fonts from my windows computer. Not to mention the Windows driver for my wireless card through ndiswrapper (it's an SiS 162U - completely linux unsupported without ndis).
It'd be nice if I had stable OSS / CC solutions for all this stuff, but I don't. So, I have to make do with the proprietary stuff.
As a target, a sudoable account == an administrator account.
Honestly. What makes people think that if Desktop Linux starts attracting virus writers, they won't try to sudo their Bad Things?
Your user should not be a sudoer. Your account should have to explicitly su root and enter a password. If you're talking security, anything else is just masturbation.
Meanwhile, I run as root. I don't give a shit about security; I have a mostly disposable system, viruses aren't targeting linux nearly enough for me to care, and my distro lets me do it without issue - as a result, it's path of least resistance for me.
Slashdot Mirror
That's what the man said. Linux.
Ubuntu or Slax would do the job, and Slax would install in minutes.
But, hey. If you're looking for 'Just Works', try Linspire. It's costed, but it's pretty clean, so far as distros go.
~s/Ubuntu/Generic Live/
The thing is this:
The god-fearing, tech-illiterate masses seems to be quickly shrinking into a single group: corporate execs.
Guess who the revolution is being planned against.
As a star accelerates away, the red shift becomes more pronounced. This is gravity neutral, so the wind is irrelevant in this case (gravity doesn't slow light; it just bends it; light at a black hole, for example, is traveling at its normal ~300Mm/s, but in very tight circles around the singularity (theoretically)).
See, the doppler effect is dependant on speed. Since acceleration is change in speed, it causes the shift to increase. We can tell the universe is accelerating outward because of the speed at which spectra shift.
Now, on to the police car version: If the 5mph is away from you, you may be unlikely to hear the police car; the compression waves emitted by its siren may (depending on how loud it is and how long the tunnel is) be overcome by the movement of the air it's compressing. At the very least, the siren would be quieter.
If it's travelling towards you, the siren would be louder.
I'm unsure of how the wind would affect the pitch of the siren, but I can guess it would cause the waves to behave much in the same way as doppler, since the transverse waves would be coming at you at faster or slower rates.
On to "Dark Matter". It doesn't exist as is found in popular sci-fi. Dark matter is an all-encompassing term for stuff we can't see, whether by radio emissions or by telescope. There's a lot we can't see. Truth be told, our idea of the mass of the universe is based on using what we CAN see as a statistical sample, and an estimate as to the extent of the universe, using its known age and acceleration rate as a guide. 'Dark matter' just makes up the difference between that estimate and the mass the universe should have, mathematically speaking, to give us our observed data.
We can't see it, yet we know it's there. So it's dark. Get it?
That's not to say it's some extraordinary form of matter (though theoretical physicists, astronomers, and sci-fi writers love to play with odd matter ideas). It could be something as lame as an inordinate number of accretion discs and non-emitting bodies. It could be black holes or MECOs. We just don't have the data.
To paraphrase the Hitchhiker's Guide, the universe is big. I mean really, mind-bogglingly big. As such, cataloguing all its macroscopic contents (i.e. stars, planets, etc) is going to take a while longer than a run down to the chemist's.
You're honestly telling me you've never seen iChat before? They've been doing that stupid shit for ages now.
*smack*
How DARE you confuse H2G2 with Monty Python.
All in favor of revoking his geek license, say 'Aye!'
Actually, red/blue shift is only about relative speed, and is a function of the doppler effect.
If you accelerate towards an object at relativistic speeds (anything above, say 10% c), it becomes bluer. This is because the light waves are coming to you at a faster rate than they would if you were a static distance from the object. Similarly, as you accelerate away, it becomes redder.
How does this apply to stars, and how does it help us find out the speed at which they're traveling relative to us?
Say the spectra lines from a star are like this:
| | | | |
Well, none of the spectra patterns you know of match up, but if you move it to the right by an amount (shift it to the blue), it matches up exactly with the spectra pattern for a hydrogen burning yellow star:
| | | | |
Because of this, we know that the star is hydrogen burning and is moving away from us. The amount of the shift tells us just how fast; you can calculate it in much the same way doppler radar calculates how clouds move in a weather pattern.
It's called 'Red Shift' because its spectra pattern has been shifted towards the red.
A simpler experiment. Go commit a crime. Wait for a police car to fly by, sirens blaring. The pitch of the siren changes as it approaches and moves past, yes? As you're handcuffed, you may think to yourself how, because of the spectral analysis you do in your head, as well as the simple pattern recognition, you knew immediately that not only was it the fuzz, and that you should get the hell outta there.
But, like the good student you are, you stayed and completed your lesson. Hooray for science! I'll see you in 10-15.
Organic chemists, yes.
But at the very least, biologists and organic chemists share and incorporate information readily. They have to; the connection between the disciplines is obvious.
The connection between astronomy and plasma physics wasn't until we figured out what stars were made from.
Yeah, it's just weird that REMOVING the x86 emulation component from Virtual PC would be too much work.
*sigh* I guess we just wait for Darwine to mature.
Well, think about it. Organized crystal structures form much more readily in low-gravity, and an impact event (two asteroids violently meeting in the black) could easily produced the sort of initial chaos needed to allow for a life-formation event (formation of amino acids and proteins as the rocks cool). Smash that into the earth, and you have a similar situation. I wouldn't be surprised if an impact event is the catalyst for life on those planets which can support it.
Before people start getting uppity about silicon-based life and how it could exist on a very hot planet, keep this in mind: Yes, silicon organics are possible and have been synthesized - but what would they use instead of water? In order to be as flexible as carbon organics, they have to be much hotter (> 100C), so there is a need for a liquid that handles those temperatures with similar properties (Anyone know the properties of Li2S?)
I submit that it is no accident that earth life is carbon-based. Lower energies needed to remain pliable and adaptable at the molecular level, and it just happens to be the most promiscuous atom to be found (can handle four covalent bonds and links up far more rapidly to the next-best, silicon).
I think if we're going to find life out there, we should be looking for a planet with similar heat characteristics to earth, with an asteroid belt or cometary system that would cause likley impacts every hundered thousand years or so (often enough to produce many many high-energy impact events to stir things up enough to form life, but not often enough to kill all life before it's got a chance to go multicellular)
I mean, once you're in our temperature range, water's a no brainer. Just captured solar wind over the millenia may be enough hydrogen to allow enough water to accrete on a planetoid (especially if there's enough oxygen in the planetoid's original mass-mix).
9cm dia. disc with 400GB (assuming 1cm dia. spindle) = 400G / (63.61-0.79) cm^2 = 6.37G / cm^2
2.5cm dia. disc (assuming 0.5cm dia. spindle) = (4.91-0.2)cm^2*6.37(G/cm^2)=30.0027G
Damned good math there, man. Kudos.
And if I can get it in rewritable, all the better.
Hunh?
Limewire is one of 13 different compatible implementations of Gnutella - none of which require a server or other organization to run the network. The RIAA may try, but attacking Limewire will get them even less in the way of results than attacking Napster or Kazaa.
http://www.gnutelliums.com/windows/ has a list of all the other Gnutella clients for Windows.
The real shame here is that OS-X's only other real searchable filesharing option is Phex - which, if I remember correctly is on the slow side.
Hm.
Now, theoretically, Cedega and Cider will share a certain amount of common code base. Does this mean that one day, in the far-flung future, Cedega will be actually worth paying for?
I would like to state for the record that this is the MOST commentage I've ever gotten on Slashdot.
No. Seriously.
Also, I'd like to note that the 70% Insightful / 20% Overrated / 10% Flamebait is rather telling of where the particularly loud ST TOS fans lay.
Without people and their interactions, there is no reason for the story.
Now, mind you, they did a bad job of integrating the personal stuff with the action stuff (BSG does a DAMNED good job of this), but it was the first good step in the direction of humanistic sci-fi.
I actually think the world is ready for some Heinlein-book based movies at this point - though, I hope they won't be torn to shreds like 'Starship Troopers' was.
No, seriously. 'The Moon is a Harsh Mistress' would make great a politico-sci-fi film.
Yo. Zealot. Get over yourself.
"... but didn't like B5 for whatever reasons."
Acting so bad it was too painful to watch. Writing that, while interesting as a long-term plot line, was cheesy as hell if you got close enough to smell it.
Sorry. Tried watching it recently. Thought, "I was just a teen when it was on. It couldn't be that bad if so many of my peers love it." Couldn't do it. Couldn't sit through the woodenness. Couldn't handle the small-scale cheese.
Hey, why not post-destabilization federation? A handful of federated outposts remaining, just trying to survive.
And the rest of the star trek universe was episodic shite.
Hey, look, I can be an idiot too.
If you were your age now, and introduced to the original series as an adult with no prior Star Trekkiness, you, like me, would be under the impression that it sucked bad.
Lousy acting, lame plots, almost no finish. Sorry, but it simply doesn't live up to today's standards.
I thought DS9 was the gem in the group, but almost no one agrees there; oddly, some geeks just can't handle a coherent plot.
Meanwhile, it's completely unnecessary.
Check out the man page for mplayer/mencoder. It will decrypt and transcode a DVD in one step (if you give the right command line - usually an exceedingly long one.
Not feeling the command line? Well, one of these [ http://www.mplayerhq.hu/design7/projects.html ] should help.
I don't know about VLC, but in mplayer, if you're using the svga or vesa driver, or you're using the x11/xv driver with a generic X video driver, VLC doesn't antialias; it'd be too slow.
So, run xconf (or some similar video autodetection util), and ensure VLC is using its equivalent of the x11/xv driver. Or OpenGL, if you got it.
I don't see what your problem with linspire is. What you're paying for is time savings, essentially. You're paying $99 for a system that doesn't need much anything in the way of setup, and another $99 per year for guaranteed-working builds of free software (something I've found is lacking in the wikiality of community-assembled builds of OSS).
Usually, linux needs careful configuration to get it working well, and when it's done, it works better than anything else. But it takes time and patience.
Not dissing OSS or anything, but the QC is great with Linspire. I don't use it, but I understand what they are charging for.
No one but zealots use OSS exclusively. If you do, you're very limited in what you can access.
Hell, the first thing I do when I install linux is get Flash, Java, Acrobat, the MPlayer windows codec pack, and the 300M archive of freeware and MS universal accessibility fonts from my windows computer. Not to mention the Windows driver for my wireless card through ndiswrapper (it's an SiS 162U - completely linux unsupported without ndis).
It'd be nice if I had stable OSS / CC solutions for all this stuff, but I don't. So, I have to make do with the proprietary stuff.
As a target, a sudoable account == an administrator account.
Honestly. What makes people think that if Desktop Linux starts attracting virus writers, they won't try to sudo their Bad Things?
Your user should not be a sudoer. Your account should have to explicitly su root and enter a password. If you're talking security, anything else is just masturbation.
Meanwhile, I run as root. I don't give a shit about security; I have a mostly disposable system, viruses aren't targeting linux nearly enough for me to care, and my distro lets me do it without issue - as a result, it's path of least resistance for me.