<article>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#article10_02_03_2253214</id>
	<title>Giving CubeSats Electric Propulsion</title>
	<author>timothy</author>
	<datestamp>1265196120000</datestamp>
	<htmltext>eldavojohn writes <i>"Thirteen picosatellites were <a href="//science.slashdot.org/story/06/05/31/1921218/13-Pico-Satellites-to-Launch-June-28th">launched back in June of 2006</a> with the <a href="http://science.slashdot.org/story/09/08/02/1653256/Orbit-Your-Own-Satellite-For-8000">price coming down dramatically</a> in the years since. But the Rubik's cube sized devices have no mobility, meaning once they're put in orbit, they stay in that orbit.  The big problem is that traditional chemical propulsion systems are too large for ten-centimeter sided cubes weighing a kilogram.  A new <a href="http://web.mit.edu/newsoffice/2010/cubesat-01115.html">electric propulsion system designed by Paulo Lozano of MIT</a> might change that. "</i></htmltext>
<tokenext>eldavojohn writes " Thirteen picosatellites were launched back in June of 2006 with the price coming down dramatically in the years since .
But the Rubik 's cube sized devices have no mobility , meaning once they 're put in orbit , they stay in that orbit .
The big problem is that traditional chemical propulsion systems are too large for ten-centimeter sided cubes weighing a kilogram .
A new electric propulsion system designed by Paulo Lozano of MIT might change that .
"</tokentext>
<sentencetext>eldavojohn writes "Thirteen picosatellites were launched back in June of 2006 with the price coming down dramatically in the years since.
But the Rubik's cube sized devices have no mobility, meaning once they're put in orbit, they stay in that orbit.
The big problem is that traditional chemical propulsion systems are too large for ten-centimeter sided cubes weighing a kilogram.
A new electric propulsion system designed by Paulo Lozano of MIT might change that.
"</sentencetext>
</article>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31021364</id>
	<title>MIT = written for retards?</title>
	<author>Gothmolly</author>
	<datestamp>1265293920000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>I stopped reading after the 3rd or 4th time they explained what something as simple as an ion was.  Hello MIT, you guys are eggheads, not the Discovery Channel.</p></htmltext>
<tokenext>I stopped reading after the 3rd or 4th time they explained what something as simple as an ion was .
Hello MIT , you guys are eggheads , not the Discovery Channel .</tokentext>
<sentencetext>I stopped reading after the 3rd or 4th time they explained what something as simple as an ion was.
Hello MIT, you guys are eggheads, not the Discovery Channel.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31018252</id>
	<title>Cool, sounds like it holds water</title>
	<author>CrazyJim1</author>
	<datestamp>1264952280000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>I remember in physics class theorizing a propulsion system for a space ship.  I figured that the only way to get thrust would be to accelerate hydrogen to as fast as you can then zip it out the thrusters.  You'd have low mass, but high velocity propulsion.  It sounds like this guy figured out a way to do this in a compact form.  If this seriously works, I'm excited because it will allow satellites all over the solar system for relatively cheap.  Put a high imaging camera on your satellite and snap pictures from around the solar system!  It is nice that even though NASA has a shoestring budget that space exploration can still make advances.</htmltext>
<tokenext>I remember in physics class theorizing a propulsion system for a space ship .
I figured that the only way to get thrust would be to accelerate hydrogen to as fast as you can then zip it out the thrusters .
You 'd have low mass , but high velocity propulsion .
It sounds like this guy figured out a way to do this in a compact form .
If this seriously works , I 'm excited because it will allow satellites all over the solar system for relatively cheap .
Put a high imaging camera on your satellite and snap pictures from around the solar system !
It is nice that even though NASA has a shoestring budget that space exploration can still make advances .</tokentext>
<sentencetext>I remember in physics class theorizing a propulsion system for a space ship.
I figured that the only way to get thrust would be to accelerate hydrogen to as fast as you can then zip it out the thrusters.
You'd have low mass, but high velocity propulsion.
It sounds like this guy figured out a way to do this in a compact form.
If this seriously works, I'm excited because it will allow satellites all over the solar system for relatively cheap.
Put a high imaging camera on your satellite and snap pictures from around the solar system!
It is nice that even though NASA has a shoestring budget that space exploration can still make advances.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017110</id>
	<title>obama is fucking you white man</title>
	<author>Anonymous</author>
	<datestamp>1264943580000</datestamp>
	<modclass>Flamebait</modclass>
	<modscore>-1</modscore>
	<htmltext>he has his dick planted firmly in your ass.</htmltext>
<tokenext>he has his dick planted firmly in your ass .</tokentext>
<sentencetext>he has his dick planted firmly in your ass.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016774</id>
	<title>Pico</title>
	<author>Brian Gordon</author>
	<datestamp>1264941420000</datestamp>
	<modclass>Funny</modclass>
	<modscore>4</modscore>
	<htmltext><p>What, we've exhausted the marketability of the buzzword nano and have stepped it up to pico? Somehow I doubt that regular satellites mass 10^12 kilograms.</p></htmltext>
<tokenext>What , we 've exhausted the marketability of the buzzword nano and have stepped it up to pico ?
Somehow I doubt that regular satellites mass 10 ^ 12 kilograms .</tokentext>
<sentencetext>What, we've exhausted the marketability of the buzzword nano and have stepped it up to pico?
Somehow I doubt that regular satellites mass 10^12 kilograms.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017390</id>
	<title>Re:Pico</title>
	<author>twostar</author>
	<datestamp>1264945320000</datestamp>
	<modclass>Informativ</modclass>
	<modscore>2</modscore>
	<htmltext>Picosatellite is just a general classification in the satellite community of 1kg. "Small" satellites are anything from 500kg down. Notice it's not Pico- kg but pico-satellite.

<a href="http://en.wikipedia.org/wiki/Small\_satellite" title="wikipedia.org">http://en.wikipedia.org/wiki/Small\_satellite</a> [wikipedia.org]</htmltext>
<tokenext>Picosatellite is just a general classification in the satellite community of 1kg .
" Small " satellites are anything from 500kg down .
Notice it 's not Pico- kg but pico-satellite .
http : //en.wikipedia.org/wiki/Small \ _satellite [ wikipedia.org ]</tokentext>
<sentencetext>Picosatellite is just a general classification in the satellite community of 1kg.
"Small" satellites are anything from 500kg down.
Notice it's not Pico- kg but pico-satellite.
http://en.wikipedia.org/wiki/Small\_satellite [wikipedia.org]</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016774</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017872</id>
	<title>Re:Launched, yes. Orbited, not so much.</title>
	<author>nanoakron</author>
	<datestamp>1264949100000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>This should be part of the intro - none of these satellites currently exist. They were all blown up during their failed launch.</p></htmltext>
<tokenext>This should be part of the intro - none of these satellites currently exist .
They were all blown up during their failed launch .</tokentext>
<sentencetext>This should be part of the intro - none of these satellites currently exist.
They were all blown up during their failed launch.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016876</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31018214</id>
	<title>Re:CubeSats are a revolution</title>
	<author>khallow</author>
	<datestamp>1264951980000</datestamp>
	<modclass>Informativ</modclass>
	<modscore>3</modscore>
	<htmltext>ISP of 3500 s and 5.6 micronewtons of thrust. Not bad for a station keeping device on a 10 cm cube (generates roughly 3 m/s of delta v over a month, if the cube is dense as solid iron), but it's going to be vastly slow (unless, of course, you have an array of them) for other uses.</htmltext>
<tokenext>ISP of 3500 s and 5.6 micronewtons of thrust .
Not bad for a station keeping device on a 10 cm cube ( generates roughly 3 m/s of delta v over a month , if the cube is dense as solid iron ) , but it 's going to be vastly slow ( unless , of course , you have an array of them ) for other uses .</tokentext>
<sentencetext>ISP of 3500 s and 5.6 micronewtons of thrust.
Not bad for a station keeping device on a 10 cm cube (generates roughly 3 m/s of delta v over a month, if the cube is dense as solid iron), but it's going to be vastly slow (unless, of course, you have an array of them) for other uses.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016772</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017056</id>
	<title>Re:why even use propelant ?</title>
	<author>$RANDOMLUSER</author>
	<datestamp>1264943160000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Something like a <a href="http://en.wikipedia.org/wiki/Magnetorquer" title="wikipedia.org">Magnetorquer</a> [wikipedia.org]?</htmltext>
<tokenext>Something like a Magnetorquer [ wikipedia.org ] ?</tokentext>
<sentencetext>Something like a Magnetorquer [wikipedia.org]?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016974</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016876</id>
	<title>Launched, yes. Orbited, not so much.</title>
	<author>Anonymous</author>
	<datestamp>1264942140000</datestamp>
	<modclass>Informativ</modclass>
	<modscore>4</modscore>
	<htmltext>The engines on the the DNEPR-1 launched on 26 July 2006 shut down 86 seconds into the flight. It crashed approximately 25 km downrange. So, quite a bit of "bang" for your buck.</htmltext>
<tokenext>The engines on the the DNEPR-1 launched on 26 July 2006 shut down 86 seconds into the flight .
It crashed approximately 25 km downrange .
So , quite a bit of " bang " for your buck .</tokentext>
<sentencetext>The engines on the the DNEPR-1 launched on 26 July 2006 shut down 86 seconds into the flight.
It crashed approximately 25 km downrange.
So, quite a bit of "bang" for your buck.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016772</id>
	<title>CubeSats are a revolution</title>
	<author>QuantumG</author>
	<datestamp>1264941420000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>5</modscore>
	<htmltext><p>CubeSats are the "cheap access to space" needed for research and technology risk reduction that's been needed since the dawn of the space age.. and it didn't require some magical new propulsion method or even new economies of scale in launchers, just good standards and a very big customer, the Airforce academy.</p><p>For those of you who find the article a little light on details, here's the scientific paper:</p><p>
&nbsp; &nbsp; <a href="http://sgc.engin.umich.edu/erps/IEPC\_2007/PAPERS/IEPC-2007-145.pdf" title="umich.edu">http://sgc.engin.umich.edu/erps/IEPC\_2007/PAPERS/IEPC-2007-145.pdf</a> [umich.edu]</p><p>This preliminary work is now being flight tested.. and, if all goes well, it'll soon be commercially available.  When's soon?  3 to 5 years.  That's what CubeSats give you, a reduction in lab-to-market from 10 years or longer to 6.</p></htmltext>
<tokenext>CubeSats are the " cheap access to space " needed for research and technology risk reduction that 's been needed since the dawn of the space age.. and it did n't require some magical new propulsion method or even new economies of scale in launchers , just good standards and a very big customer , the Airforce academy.For those of you who find the article a little light on details , here 's the scientific paper :     http : //sgc.engin.umich.edu/erps/IEPC \ _2007/PAPERS/IEPC-2007-145.pdf [ umich.edu ] This preliminary work is now being flight tested.. and , if all goes well , it 'll soon be commercially available .
When 's soon ?
3 to 5 years .
That 's what CubeSats give you , a reduction in lab-to-market from 10 years or longer to 6 .</tokentext>
<sentencetext>CubeSats are the "cheap access to space" needed for research and technology risk reduction that's been needed since the dawn of the space age.. and it didn't require some magical new propulsion method or even new economies of scale in launchers, just good standards and a very big customer, the Airforce academy.For those of you who find the article a little light on details, here's the scientific paper:
    http://sgc.engin.umich.edu/erps/IEPC\_2007/PAPERS/IEPC-2007-145.pdf [umich.edu]This preliminary work is now being flight tested.. and, if all goes well, it'll soon be commercially available.
When's soon?
3 to 5 years.
That's what CubeSats give you, a reduction in lab-to-market from 10 years or longer to 6.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017168</id>
	<title>Ion drive</title>
	<author>l00sr</author>
	<datestamp>1264943880000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>2</modscore>
	<htmltext><p>Sounds like a variant of an <a href="http://en.wikipedia.org/wiki/Ion\_drive" title="wikipedia.org">ion drive</a> [wikipedia.org], which have been around since the 50's.</p></htmltext>
<tokenext>Sounds like a variant of an ion drive [ wikipedia.org ] , which have been around since the 50 's .</tokentext>
<sentencetext>Sounds like a variant of an ion drive [wikipedia.org], which have been around since the 50's.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017566</id>
	<title>engage</title>
	<author>ThinkOfaNumber</author>
	<datestamp>1264946580000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Engage the <a href="http://memory-alpha.org/en/wiki/Ion\_propulsion" title="memory-alpha.org" rel="nofollow">Ion</a> [memory-alpha.org] <a href="http://en.wikipedia.org/wiki/Ion\_thruster" title="wikipedia.org" rel="nofollow">Thrusters</a> [wikipedia.org], No. 1.</p></htmltext>
<tokenext>Engage the Ion [ memory-alpha.org ] Thrusters [ wikipedia.org ] , No .
1 .</tokentext>
<sentencetext>Engage the Ion [memory-alpha.org] Thrusters [wikipedia.org], No.
1.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017600</id>
	<title>MIT</title>
	<author>Anonymous</author>
	<datestamp>1264946820000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>While MIT is without a doubt a fantastic school, I can't help but be annoyed by the summary's phrasing here. Electrospray has been around a long time. Electrospray propulsion research as well. I myself have worked on similar devices. What he has done is make a nice compact package which offers a unique solution to a unique problem, but using more or less already existing technology. Not giving proper credit where it's due only serves to discourage everyone else slaving away in the field. Somebody tell me otherwise.</p></htmltext>
<tokenext>While MIT is without a doubt a fantastic school , I ca n't help but be annoyed by the summary 's phrasing here .
Electrospray has been around a long time .
Electrospray propulsion research as well .
I myself have worked on similar devices .
What he has done is make a nice compact package which offers a unique solution to a unique problem , but using more or less already existing technology .
Not giving proper credit where it 's due only serves to discourage everyone else slaving away in the field .
Somebody tell me otherwise .</tokentext>
<sentencetext>While MIT is without a doubt a fantastic school, I can't help but be annoyed by the summary's phrasing here.
Electrospray has been around a long time.
Electrospray propulsion research as well.
I myself have worked on similar devices.
What he has done is make a nice compact package which offers a unique solution to a unique problem, but using more or less already existing technology.
Not giving proper credit where it's due only serves to discourage everyone else slaving away in the field.
Somebody tell me otherwise.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017298</id>
	<title>Re:Pico</title>
	<author>Anonymous</author>
	<datestamp>1264944720000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>'Nano' is reaching the saturation that 'Micro' did a few years back, so yes it looks like it's time to move on</p><p>Pretty graph:</p><p>http://flowingdata.com/2009/11/20/buzzwords-in-academic-papers-comic/#</p></htmltext>
<tokenext>'Nano ' is reaching the saturation that 'Micro ' did a few years back , so yes it looks like it 's time to move onPretty graph : http : //flowingdata.com/2009/11/20/buzzwords-in-academic-papers-comic/ #</tokentext>
<sentencetext>'Nano' is reaching the saturation that 'Micro' did a few years back, so yes it looks like it's time to move onPretty graph:http://flowingdata.com/2009/11/20/buzzwords-in-academic-papers-comic/#</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016774</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017614</id>
	<title>Re:Pico</title>
	<author>Tumbleweed</author>
	<datestamp>1264946940000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><i>What, we've exhausted the marketability of the buzzword nano and have stepped it up to pico? Somehow I doubt that regular satellites mass 10^12 kilograms.</i></p><p>Small to the eXtreme!!!</p></htmltext>
<tokenext>What , we 've exhausted the marketability of the buzzword nano and have stepped it up to pico ?
Somehow I doubt that regular satellites mass 10 ^ 12 kilograms.Small to the eXtreme ! !
!</tokentext>
<sentencetext>What, we've exhausted the marketability of the buzzword nano and have stepped it up to pico?
Somehow I doubt that regular satellites mass 10^12 kilograms.Small to the eXtreme!!
!</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016774</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017824</id>
	<title>Too large for a Rubik's cube</title>
	<author>Jeremy Erwin</author>
	<datestamp>1264948620000</datestamp>
	<modclass>Informativ</modclass>
	<modscore>2</modscore>
	<htmltext><p>Each edge of a Rubik's cube is 5.7 cm long. The cubesats are 5.5 times as large.</p></htmltext>
<tokenext>Each edge of a Rubik 's cube is 5.7 cm long .
The cubesats are 5.5 times as large .</tokentext>
<sentencetext>Each edge of a Rubik's cube is 5.7 cm long.
The cubesats are 5.5 times as large.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31018666</id>
	<title>BORG!</title>
	<author>buanzo</author>
	<datestamp>1264956660000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Sorry, had to say it. That CubeSats? BORG CUBES!</htmltext>
<tokenext>Sorry , had to say it .
That CubeSats ?
BORG CUBES !</tokentext>
<sentencetext>Sorry, had to say it.
That CubeSats?
BORG CUBES!</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017026</id>
	<title>Re:why even use propelant ?</title>
	<author>DarthBart</author>
	<datestamp>1264942980000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>3</modscore>
	<htmltext><p>Larger satellite use magnetorquers to orient themselves in orbit.  To use magnetics as a drive system, your spacecraft would have to be long so you could pulse a magnetic field down the length of it (think of it as a rail gun in reverse).</p></htmltext>
<tokenext>Larger satellite use magnetorquers to orient themselves in orbit .
To use magnetics as a drive system , your spacecraft would have to be long so you could pulse a magnetic field down the length of it ( think of it as a rail gun in reverse ) .</tokentext>
<sentencetext>Larger satellite use magnetorquers to orient themselves in orbit.
To use magnetics as a drive system, your spacecraft would have to be long so you could pulse a magnetic field down the length of it (think of it as a rail gun in reverse).</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016974</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31030862</id>
	<title>Re:Cool, sounds like it holds water</title>
	<author>petermgreen</author>
	<datestamp>1265303160000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>One problem I see coming up is energy, roughly speaking (Newtonian physics) kinetic energy is proportional to the square of the velocity</p><p>So if you double your exhaust velocity (and keep your energy losses the same) you double your propellant efficiency but halve your energy efficiency.</p><p>In other words if you want a spaceship with high acceleration and high propellant efficancy you are going to need to find a shitload of power from somewhere....</p></htmltext>
<tokenext>One problem I see coming up is energy , roughly speaking ( Newtonian physics ) kinetic energy is proportional to the square of the velocitySo if you double your exhaust velocity ( and keep your energy losses the same ) you double your propellant efficiency but halve your energy efficiency.In other words if you want a spaceship with high acceleration and high propellant efficancy you are going to need to find a shitload of power from somewhere... .</tokentext>
<sentencetext>One problem I see coming up is energy, roughly speaking (Newtonian physics) kinetic energy is proportional to the square of the velocitySo if you double your exhaust velocity (and keep your energy losses the same) you double your propellant efficiency but halve your energy efficiency.In other words if you want a spaceship with high acceleration and high propellant efficancy you are going to need to find a shitload of power from somewhere....</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31018252</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016974</id>
	<title>why even use propelant ?</title>
	<author>Anonymous</author>
	<datestamp>1264942680000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>just out of curiosity these satelites dont operate in deepspace.<br>Why not make use of earth's magnetic field to manouvre a bit around, maybe in combination with a small solar sail.<br>The point it that it wouldnt cost any propelant. (it might be less easy, but it will be able to move).</p><p>more might be done with a set of gyroscopes, they can move in areas in places where the gravitational field is curved.<br>Around earth it is curved, some other scientist ( not crank.dot ) have allready shown how to do that.<br>I'm sorry i cannt find back a link of it but it has been explored this subject and it seams valid for earth's near space.<br>And earth's near space is the most likely place where these devices will operate.<nobr> <wbr></nobr>:) you can always improve jut by using your mind....</p></htmltext>
<tokenext>just out of curiosity these satelites dont operate in deepspace.Why not make use of earth 's magnetic field to manouvre a bit around , maybe in combination with a small solar sail.The point it that it wouldnt cost any propelant .
( it might be less easy , but it will be able to move ) .more might be done with a set of gyroscopes , they can move in areas in places where the gravitational field is curved.Around earth it is curved , some other scientist ( not crank.dot ) have allready shown how to do that.I 'm sorry i cannt find back a link of it but it has been explored this subject and it seams valid for earth 's near space.And earth 's near space is the most likely place where these devices will operate .
: ) you can always improve jut by using your mind... .</tokentext>
<sentencetext>just out of curiosity these satelites dont operate in deepspace.Why not make use of earth's magnetic field to manouvre a bit around, maybe in combination with a small solar sail.The point it that it wouldnt cost any propelant.
(it might be less easy, but it will be able to move).more might be done with a set of gyroscopes, they can move in areas in places where the gravitational field is curved.Around earth it is curved, some other scientist ( not crank.dot ) have allready shown how to do that.I'm sorry i cannt find back a link of it but it has been explored this subject and it seams valid for earth's near space.And earth's near space is the most likely place where these devices will operate.
:) you can always improve jut by using your mind....</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017326</id>
	<title>Re:Pico</title>
	<author>Anonymous</author>
	<datestamp>1264944960000</datestamp>
	<modclass>Informativ</modclass>
	<modscore>1</modscore>
	<htmltext><p>Having recently attended a small satellite conference, I learned that when it comes to satellites, micro- refers to satellites under 100 kg, nano- refers to satellites under 10 kg, and pico- refers to satellites under 1 kg.  Since the nominal mass of a 1-unit CubeSat is 1 kg, they are typically called picosatellites.</p></htmltext>
<tokenext>Having recently attended a small satellite conference , I learned that when it comes to satellites , micro- refers to satellites under 100 kg , nano- refers to satellites under 10 kg , and pico- refers to satellites under 1 kg .
Since the nominal mass of a 1-unit CubeSat is 1 kg , they are typically called picosatellites .</tokentext>
<sentencetext>Having recently attended a small satellite conference, I learned that when it comes to satellites, micro- refers to satellites under 100 kg, nano- refers to satellites under 10 kg, and pico- refers to satellites under 1 kg.
Since the nominal mass of a 1-unit CubeSat is 1 kg, they are typically called picosatellites.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016774</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31019110</id>
	<title>Re:Pico</title>
	<author>vonux</author>
	<datestamp>1264961640000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><div class="quote"><p>Actually, it's a typo.</p></div><p>Typosats? I guess you're talking about the <a href="http://en.wikipedia.org/wiki/Mars\_Climate\_Orbiter#The\_metric.2Fimperial\_mix-up" title="wikipedia.org" rel="nofollow">Mars Climate Orbiter</a> [wikipedia.org]<nobr> <wbr></nobr>;)</p></div>
	</htmltext>
<tokenext>Actually , it 's a typo.Typosats ?
I guess you 're talking about the Mars Climate Orbiter [ wikipedia.org ] ; )</tokentext>
<sentencetext>Actually, it's a typo.Typosats?
I guess you're talking about the Mars Climate Orbiter [wikipedia.org] ;)
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016894</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31019876</id>
	<title>Re:Pico</title>
	<author>Random Destruction</author>
	<datestamp>1265275620000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>As sibling posts said, pico is under 1kg.  You'll be disappointed to hear that I'm part of a team working on a femtosatellite.  That is, a satellite under 100grams.  Buzzword that!</htmltext>
<tokenext>As sibling posts said , pico is under 1kg .
You 'll be disappointed to hear that I 'm part of a team working on a femtosatellite .
That is , a satellite under 100grams .
Buzzword that !</tokentext>
<sentencetext>As sibling posts said, pico is under 1kg.
You'll be disappointed to hear that I'm part of a team working on a femtosatellite.
That is, a satellite under 100grams.
Buzzword that!</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016774</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016894</id>
	<title>Re:Pico</title>
	<author>Anonymous</author>
	<datestamp>1264942200000</datestamp>
	<modclass>Funny</modclass>
	<modscore>4</modscore>
	<htmltext>Actually, it's a typo. It should have read pikasatellites, from Pikachu. They fit in your hand, send out bursts of highly charged particles...it makes sense, no?</htmltext>
<tokenext>Actually , it 's a typo .
It should have read pikasatellites , from Pikachu .
They fit in your hand , send out bursts of highly charged particles...it makes sense , no ?</tokentext>
<sentencetext>Actually, it's a typo.
It should have read pikasatellites, from Pikachu.
They fit in your hand, send out bursts of highly charged particles...it makes sense, no?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016774</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017348</id>
	<title>Re:CubeSats are a revolution</title>
	<author>xquercus</author>
	<datestamp>1264945080000</datestamp>
	<modclass>Informativ</modclass>
	<modscore>2</modscore>
	<htmltext>The <a href="http://www.amsat.org/amsat-new/satellites/cubesats.php" title="amsat.org" rel="nofollow">cubesat platform</a> [amsat.org] has provided a means for quite a few <a href="http://www.amsat.org/amsat-new/satellites/status.php" title="amsat.org" rel="nofollow">orbiting radio amateur experiments</a> [amsat.org].</htmltext>
<tokenext>The cubesat platform [ amsat.org ] has provided a means for quite a few orbiting radio amateur experiments [ amsat.org ] .</tokentext>
<sentencetext>The cubesat platform [amsat.org] has provided a means for quite a few orbiting radio amateur experiments [amsat.org].</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016772</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31019132</id>
	<title>Another Star Trek story line</title>
	<author>ALeader71</author>
	<datestamp>1264961940000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext>"It's ion power Captain."</htmltext>
<tokenext>" It 's ion power Captain .
"</tokentext>
<sentencetext>"It's ion power Captain.
"</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31019768</id>
	<title>Re:CubeSats are a revolution</title>
	<author>Anonymous</author>
	<datestamp>1265317140000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>This idea is not original...(I've been around cubesats for many a year, I'm working on one right now)  Electric propulsion drives have been around for a long time, most use some kind of pulse to zap material, anything that wont re-condense on your satellite... congrats to mit for reinventing a scaled up wheel and sticking it on a cubesat...</p></htmltext>
<tokenext>This idea is not original... ( I 've been around cubesats for many a year , I 'm working on one right now ) Electric propulsion drives have been around for a long time , most use some kind of pulse to zap material , anything that wont re-condense on your satellite... congrats to mit for reinventing a scaled up wheel and sticking it on a cubesat.. .</tokentext>
<sentencetext>This idea is not original...(I've been around cubesats for many a year, I'm working on one right now)  Electric propulsion drives have been around for a long time, most use some kind of pulse to zap material, anything that wont re-condense on your satellite... congrats to mit for reinventing a scaled up wheel and sticking it on a cubesat...</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016772</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31019930</id>
	<title>Re:MIT</title>
	<author>Anonymous</author>
	<datestamp>1265276160000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext>Otherwise.</htmltext>
<tokenext>Otherwise .</tokentext>
<sentencetext>Otherwise.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017600</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31018554</id>
	<title>Cubesat</title>
	<author>Anonymous</author>
	<datestamp>1264955280000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>I am actually working with several of these in my time at Uni. They really are tiny and only occupy a very small percentage of space (still more than 99\% of LEO is unoccupied). Plus one of my personal objectives for the mission we are carrying out for the Air Force is to have them de-orbit themselves once the mission is complete. All of a spacecraft of that size would burn up upon re-entry, except if there was any titanium involved, which would survive to the surface (special regulation exists to prevent accidents with stuff like that) But getting back to the propulsion, this sounds like an interesting idea, it sadly wouldn't fit in our mission, but I'm sure it would be a nice solution for other cubesats (provided its cheap) all those parts get expensive quick.</p></htmltext>
<tokenext>I am actually working with several of these in my time at Uni .
They really are tiny and only occupy a very small percentage of space ( still more than 99 \ % of LEO is unoccupied ) .
Plus one of my personal objectives for the mission we are carrying out for the Air Force is to have them de-orbit themselves once the mission is complete .
All of a spacecraft of that size would burn up upon re-entry , except if there was any titanium involved , which would survive to the surface ( special regulation exists to prevent accidents with stuff like that ) But getting back to the propulsion , this sounds like an interesting idea , it sadly would n't fit in our mission , but I 'm sure it would be a nice solution for other cubesats ( provided its cheap ) all those parts get expensive quick .</tokentext>
<sentencetext>I am actually working with several of these in my time at Uni.
They really are tiny and only occupy a very small percentage of space (still more than 99\% of LEO is unoccupied).
Plus one of my personal objectives for the mission we are carrying out for the Air Force is to have them de-orbit themselves once the mission is complete.
All of a spacecraft of that size would burn up upon re-entry, except if there was any titanium involved, which would survive to the surface (special regulation exists to prevent accidents with stuff like that) But getting back to the propulsion, this sounds like an interesting idea, it sadly wouldn't fit in our mission, but I'm sure it would be a nice solution for other cubesats (provided its cheap) all those parts get expensive quick.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31028296</id>
	<title>Re:Cool, sounds like it holds water</title>
	<author>uncle slacky</author>
	<datestamp>1265284740000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>If it's in LEO, there should be enough free atmospheric molecules (and hydrogen) to run an EHD-based "lifter" type of propulsion (aka Biefeld-Brown or Serrano effect), given an electrical supply (solar cells?):<br><a href="http://en.wikipedia.org/wiki/Ionocraft" title="wikipedia.org" rel="nofollow">http://en.wikipedia.org/wiki/Ionocraft</a> [wikipedia.org]</p><p>So, no need to store fuel, either.</p></htmltext>
<tokenext>If it 's in LEO , there should be enough free atmospheric molecules ( and hydrogen ) to run an EHD-based " lifter " type of propulsion ( aka Biefeld-Brown or Serrano effect ) , given an electrical supply ( solar cells ?
) : http : //en.wikipedia.org/wiki/Ionocraft [ wikipedia.org ] So , no need to store fuel , either .</tokentext>
<sentencetext>If it's in LEO, there should be enough free atmospheric molecules (and hydrogen) to run an EHD-based "lifter" type of propulsion (aka Biefeld-Brown or Serrano effect), given an electrical supply (solar cells?
):http://en.wikipedia.org/wiki/Ionocraft [wikipedia.org]So, no need to store fuel, either.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31018252</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31016618</id>
	<title>Niggers</title>
	<author>Anonymous</author>
	<datestamp>1264940760000</datestamp>
	<modclass>Troll</modclass>
	<modscore>-1</modscore>
	<htmltext>Please, send the niggers and the dune coons to outer space.  Esp the dune coons, the niggers are mostly just self-destructive, its the fucking islamic dune coons that are a danger to both themselves and others.  yeah the peaceful serene religion of islam, thats why some of the worlds worst criminals believe in it wholeheartedly.  somehow that makes sense to you PC fucks eh</htmltext>
<tokenext>Please , send the niggers and the dune coons to outer space .
Esp the dune coons , the niggers are mostly just self-destructive , its the fucking islamic dune coons that are a danger to both themselves and others .
yeah the peaceful serene religion of islam , thats why some of the worlds worst criminals believe in it wholeheartedly .
somehow that makes sense to you PC fucks eh</tokentext>
<sentencetext>Please, send the niggers and the dune coons to outer space.
Esp the dune coons, the niggers are mostly just self-destructive, its the fucking islamic dune coons that are a danger to both themselves and others.
yeah the peaceful serene religion of islam, thats why some of the worlds worst criminals believe in it wholeheartedly.
somehow that makes sense to you PC fucks eh</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017158</id>
	<title>A physics process?</title>
	<author>Hurricane78</author>
	<datestamp>1264943820000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>3</modscore>
	<htmltext><p><div class="quote"><p>Lozano's design relies on electrospraying, <strong>a physics process</strong>...</p></div><p>No way! I thought it would be a magic fairy magic process! (So magic, they used the word twice!) With glitter and unicorns!</p><p>&lt;/sarcasm&gt;</p></div>
	</htmltext>
<tokenext>Lozano 's design relies on electrospraying , a physics process...No way !
I thought it would be a magic fairy magic process !
( So magic , they used the word twice !
) With glitter and unicorns !</tokentext>
<sentencetext>Lozano's design relies on electrospraying, a physics process...No way!
I thought it would be a magic fairy magic process!
(So magic, they used the word twice!
) With glitter and unicorns!
	</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017944</id>
	<title>As the technology increases</title>
	<author>Ace905</author>
	<datestamp>1264949580000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>You know what's funny about this, is we're going to end up with a situation where increases in the propulsion systems end up sending newer satellites past ones launched earlier before they complete their missions.  We'll end up with a cloud of ever decreasing technological junk arriving at distant civilizations....</p></htmltext>
<tokenext>You know what 's funny about this , is we 're going to end up with a situation where increases in the propulsion systems end up sending newer satellites past ones launched earlier before they complete their missions .
We 'll end up with a cloud of ever decreasing technological junk arriving at distant civilizations... .</tokentext>
<sentencetext>You know what's funny about this, is we're going to end up with a situation where increases in the propulsion systems end up sending newer satellites past ones launched earlier before they complete their missions.
We'll end up with a cloud of ever decreasing technological junk arriving at distant civilizations....</sentencetext>
</comment>
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-http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31017056
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	<commentlist>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31018252
-http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31030862
-http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_02_03_2253214.31028296
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