You've made you're position fairly clear on whether the current recent warming trend in global temperature is anthropogenic. My question is: do you think a mere reduction in (or cessation of) anthropic CO2 emissions will significantly reduce this trend, and whether larger scale geoengineering is an inevitable requirement to maintain the abnormally long stable warm period that humanity has thrived in for the last few millennia?
Radial and Angular velocity are two ways of writing THE SAME THING, just in two different coordinate systems (polar and Cartesian respectively).
You seem to think that four small burns will take up more fuel than two large burns (to move in and out of the ellipsoid you're proposing would take LARGE burns). The reason I keep going on about 'transitions to a different orbit' is because every time you thrust, you're transitioning to a different orbit. The orbit may or may not be circular or stable, but it is an orbit. There is no 'just changing locations in an orbit', orbital motion does not work like that. Moving about efficiently is all about picking the orbits with the lest amount of energy needed to move between them. It takes LESS energy to move from GEO, via a Hohmann orbit, to a sub-GEO orbit, via a Hohmann orbit, and back to GEO, than it does to thrust into an elliptical and than back to GEO in one go. The reason is simple: the elliptical will have a large difference in eccentricity, so circularising would take a lot of propellant. Hohmann transfers are, by definition, the orbit with the smallest difference in eccentricity between two orbits.
But you don't need to take my word for it: look up every satellite launch ever performed within Earth orbit: all move around via Hohmann transfers. NASA, JAXA, the ESA, Roscosmos, and everyone else, don't do that for shits and giggles; they do it because it's the most efficient way of moving about using chemical propellants.
This sounds less like requiring a TPM for access to, say, the jobcentreplus website (i.e. requiring TPM for the general public) and more an attempt to stem the tide of embarrassing governmental data breaches, i.e. requiring new government and MOD hardware to be a bit less rubbish in terms of data security. Requiring new hardware to access government services for eh general public won't happen, simply because there'd need to be a way to grandfather in all the non-protected devices in public libraries, distributed through government programs, etc.
It doesn't matter how many dimensions space has, transferring to a lower orbit and waiting will be the most energy efficient approach to move around. If you want to move around in the same orbit, you'd need to thrust continuously, and use up large amounts of propellant for no good reason.
Things can move at angles as well and there are elliptical orbits.
What else do you think a Hohmann transfer is?! An elliptic orbit that lets you move from one circular to another. If you're suggesting altering the plane of the orbit though, that'd take a massive amount of propellant and completely pointless.
RepRap, the design the Makerbot was based on, can and has printed with ABS, PLA, Polycarbonate, PET, and Nylon (though vague worries about fumes have meant it's rarely used). As long as you can feed it into the extruder and set the correct temperature, you can print any thermoplastic.
Yep, iincredible pain-in-the-ass throwback. Of all the digital encoding tricks that can be used to keep down the filesize for a negligible drop in quality, interlacing is the last one I'd pick. It causes a whole host of problems, and the gains aren't nearly as big as with analog video (certainly far from a 50% reduction).
To get from one point in an orbit to another, you make two transfers. One to a lower faster orbit, then one back to the higher slower (original) orbit. As the lower orbit is faster, you track forwards relative to the original orbital position. The transfers are Hohmann transfers, which are pretty much the most efficient way of getting around when gravity slingshots or low-thrust-high-ISP sustained burn motors are unavailable.
What you appear to be describing is to thrust semiballaistically 'above' the orbit, which is a really odd thing to do (you're not on a surface, you're in microgravity!), and a massive waste of fuel.
Good luck once the PAL (or NTSC) analog broadcast spectrum no longer exists, which is in the next couple of years. And good riddance to it! Colour interlaced broadcast video was a pair of ugly (though incredibly ingenious) hacks to very old B&W broadcast systems that is an incredible pain to work with in anything other than a fully analog toolchain (what, you thought you could just sample a few hundred times each scanline and stack the result? HAH!). And even then there was little guarantee of the end product wouldn't look like ass because one component was slightly out of calibration.
Getting from one end of geostationary orbit to the other end and then slowing down to match geostationary orbit again is not trivial in terms of fuel costs.
Orbits have ends now?
Seriously though, the energy costs are trivial, and pretty much proportional to how fast you want to move around. Move into a slightly lower orbit (maybe a few m/sec delta-v for a Hohmann transfer), then wait for a while, then move back out. The shift around the orbit is dependant on how long you wait, not on how much fuel you expend. Drop down to an orbit around 1000km lower, and you can move around the whole of the GEO track in less than a month.
Unless their goal is simply to sell Android-based readers to their existing customers, this doesn't seem like a recipe for success. Why would anyone pick this over the Kindle Fire?
Because you can install the Kindle app onto it, and thus it does everything the Kindle Fire does and more? And for those outside the US, there's the chance you might even be able to buy it!
Additionally, any equipment sensitive enough to detect the trace amounts of radiation above background in a reliable manner is a) going to be rather expensive and b) need regular calibration (in the correct manner) to produce reliable and accurate results. The latter is the main reason why the whole 'citizen radiation map' thing differs wildly from the IAEA figures: buying a cheap GM tube off ebay is not the path to accurate measurements upon which health decisions should be based.
No. And it doesn't matter anyway. The Kyoto Protocol is a nice start, but even stopping every source of CO2 emission right this very second would still live the billions of tons of CO2 that have been released already to account for. Curbing emissions is a Good Idea, but I'd be very surprised if larger scale geoengineering won't prove necessary to a) prevent further warming and b) prevent overdue cooling.
No, it's more about arguing terminology. Tesla claim that the car did not 'run out of power', meaning the batteries did not go flat. Top gear claim it did run out of power, because it hit the 20% battery charge limit and throttled down to a speed that was unusable for track testing. Tesla claim the brakes did not fail. Top Gear claim that the power assist shutting down and requiring the driver to step HARD on the pedal was a failure (especially during track testing).
Exactly. I'm perfectly happy using my real name of Google+, and communicating with a few friends that way. If I want to communicate anonymously the last fucking place I'd do so would be any sort of 'social networking' site. To do so would be, not to put too fine a point on it, really fucking stupid. If you want anonymous communication, you do not do so on a website designed entirely to form and record a network between you and other people.
Re:So what if your standing IN FRONT of the wall?
on
Seeing Through Walls
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· Score: 2
Microwaves are not made of magic. They do not cook things from the 'inside out', as advertisements would have you believe. Standing in front of a high-power radar antenna will heat your from the nearside to the farside, with the power and wavelength determining the heat gradient.
GIOVE-A was built by SSTL. Lots of the components for the actual satellites are built by SSTL. ESA orders the project around, but private companies do the actual manufacturing and assembly.
Not the same thing. A Voxel is a volumetric pixel: it says that this volume of space is this colour (or whatever). A Hogel is more like a big pile of sprites: it says what this point looks like from these angles.
The "Second Renaissance" shorts make it very clear that the humans are a bunch of blithering idiots without even a basic grasp of the laws of thermodynamics.
government backing allows people to go to college, which means more educated people and more higher paying jobs. Of course this leaves a lull in the service industry
In the UK, we have the opposite problem. We have scores of university graduates (the majority with 'proper' degrees, not just dross like 'hairdressing' and the like), and almost no white collar jobs outside the banking sector. When there are multiple university graduates competing for a part-time job at the local supermarket, something is horribly wrong.
Slashdot Mirror
Paprika reference.
Dr Chiba was a therapist, so it's relevant too!
You've made you're position fairly clear on whether the current recent warming trend in global temperature is anthropogenic. My question is: do you think a mere reduction in (or cessation of) anthropic CO2 emissions will significantly reduce this trend, and whether larger scale geoengineering is an inevitable requirement to maintain the abnormally long stable warm period that humanity has thrived in for the last few millennia?
Radial and Angular velocity are two ways of writing THE SAME THING, just in two different coordinate systems (polar and Cartesian respectively).
You seem to think that four small burns will take up more fuel than two large burns (to move in and out of the ellipsoid you're proposing would take LARGE burns). The reason I keep going on about 'transitions to a different orbit' is because every time you thrust, you're transitioning to a different orbit. The orbit may or may not be circular or stable, but it is an orbit. There is no 'just changing locations in an orbit', orbital motion does not work like that. Moving about efficiently is all about picking the orbits with the lest amount of energy needed to move between them. It takes LESS energy to move from GEO, via a Hohmann orbit, to a sub-GEO orbit, via a Hohmann orbit, and back to GEO, than it does to thrust into an elliptical and than back to GEO in one go. The reason is simple: the elliptical will have a large difference in eccentricity, so circularising would take a lot of propellant. Hohmann transfers are, by definition, the orbit with the smallest difference in eccentricity between two orbits.
But you don't need to take my word for it: look up every satellite launch ever performed within Earth orbit: all move around via Hohmann transfers. NASA, JAXA, the ESA, Roscosmos, and everyone else, don't do that for shits and giggles; they do it because it's the most efficient way of moving about using chemical propellants.
Add to that list Morgan Freeman and Stephen Fry.
And for emergency alerts, Brian Blessed.
This sounds less like requiring a TPM for access to, say, the jobcentreplus website (i.e. requiring TPM for the general public) and more an attempt to stem the tide of embarrassing governmental data breaches, i.e. requiring new government and MOD hardware to be a bit less rubbish in terms of data security. Requiring new hardware to access government services for eh general public won't happen, simply because there'd need to be a way to grandfather in all the non-protected devices in public libraries, distributed through government programs, etc.
Things can move at angles as well and there are elliptical orbits.
What else do you think a Hohmann transfer is?! An elliptic orbit that lets you move from one circular to another.
If you're suggesting altering the plane of the orbit though, that'd take a massive amount of propellant and completely pointless.
RepRap, the design the Makerbot was based on, can and has printed with ABS, PLA, Polycarbonate, PET, and Nylon (though vague worries about fumes have meant it's rarely used). As long as you can feed it into the extruder and set the correct temperature, you can print any thermoplastic.
Don't forget what the i in 1080i stands for
Yep, iincredible pain-in-the-ass throwback. Of all the digital encoding tricks that can be used to keep down the filesize for a negligible drop in quality, interlacing is the last one I'd pick. It causes a whole host of problems, and the gains aren't nearly as big as with analog video (certainly far from a 50% reduction).
To get from one point in an orbit to another, you make two transfers. One to a lower faster orbit, then one back to the higher slower (original) orbit. As the lower orbit is faster, you track forwards relative to the original orbital position. The transfers are Hohmann transfers, which are pretty much the most efficient way of getting around when gravity slingshots or low-thrust-high-ISP sustained burn motors are unavailable.
What you appear to be describing is to thrust semiballaistically 'above' the orbit, which is a really odd thing to do (you're not on a surface, you're in microgravity!), and a massive waste of fuel.
Good luck once the PAL (or NTSC) analog broadcast spectrum no longer exists, which is in the next couple of years.
And good riddance to it! Colour interlaced broadcast video was a pair of ugly (though incredibly ingenious) hacks to very old B&W broadcast systems that is an incredible pain to work with in anything other than a fully analog toolchain (what, you thought you could just sample a few hundred times each scanline and stack the result? HAH!). And even then there was little guarantee of the end product wouldn't look like ass because one component was slightly out of calibration.
Getting from one end of geostationary orbit to the other end and then slowing down to match geostationary orbit again is not trivial in terms of fuel costs.
Orbits have ends now?
Seriously though, the energy costs are trivial, and pretty much proportional to how fast you want to move around. Move into a slightly lower orbit (maybe a few m/sec delta-v for a Hohmann transfer), then wait for a while, then move back out. The shift around the orbit is dependant on how long you wait, not on how much fuel you expend. Drop down to an orbit around 1000km lower, and you can move around the whole of the GEO track in less than a month.
Unless their goal is simply to sell Android-based readers to their existing customers, this doesn't seem like a recipe for success. Why would anyone pick this over the Kindle Fire?
Because you can install the Kindle app onto it, and thus it does everything the Kindle Fire does and more? And for those outside the US, there's the chance you might even be able to buy it!
Except that moving the birds from their widely differing orbits is a major expense.
Not really. A lot of the valuable satellites will be in GEO or the geostationary graveyard orbits. Moving them around takes very little energy.
Additionally, any equipment sensitive enough to detect the trace amounts of radiation above background in a reliable manner is a) going to be rather expensive and b) need regular calibration (in the correct manner) to produce reliable and accurate results. The latter is the main reason why the whole 'citizen radiation map' thing differs wildly from the IAEA figures: buying a cheap GM tube off ebay is not the path to accurate measurements upon which health decisions should be based.
Based on regular car standards (here in the UK, anyway) 20mpg is absolutely abysmal.
Did it "confirm" it was caused by man?
No. And it doesn't matter anyway. The Kyoto Protocol is a nice start, but even stopping every source of CO2 emission right this very second would still live the billions of tons of CO2 that have been released already to account for. Curbing emissions is a Good Idea, but I'd be very surprised if larger scale geoengineering won't prove necessary to a) prevent further warming and b) prevent overdue cooling.
Only if the companies do not wish to develop said features on their own.
No, it's more about arguing terminology. Tesla claim that the car did not 'run out of power', meaning the batteries did not go flat. Top gear claim it did run out of power, because it hit the 20% battery charge limit and throttled down to a speed that was unusable for track testing. Tesla claim the brakes did not fail. Top Gear claim that the power assist shutting down and requiring the driver to step HARD on the pedal was a failure (especially during track testing).
Exactly. I'm perfectly happy using my real name of Google+, and communicating with a few friends that way. If I want to communicate anonymously the last fucking place I'd do so would be any sort of 'social networking' site. To do so would be, not to put too fine a point on it, really fucking stupid. If you want anonymous communication, you do not do so on a website designed entirely to form and record a network between you and other people.
Microwaves are not made of magic. They do not cook things from the 'inside out', as advertisements would have you believe. Standing in front of a high-power radar antenna will heat your from the nearside to the farside, with the power and wavelength determining the heat gradient.
GIOVE-A was built by SSTL. Lots of the components for the actual satellites are built by SSTL. ESA orders the project around, but private companies do the actual manufacturing and assembly.
as proposed by every single anthropogenic climate change theory
And non-anthropogenic theories. It doesn't matter the hypothesised cause, the temperature rise is clear from the evidence.
Not the same thing. A Voxel is a volumetric pixel: it says that this volume of space is this colour (or whatever). A Hogel is more like a big pile of sprites: it says what this point looks like from these angles.
The "Second Renaissance" shorts make it very clear that the humans are a bunch of blithering idiots without even a basic grasp of the laws of thermodynamics.
government backing allows people to go to college, which means more educated people and more higher paying jobs. Of course this leaves a lull in the service industry
In the UK, we have the opposite problem. We have scores of university graduates (the majority with 'proper' degrees, not just dross like 'hairdressing' and the like), and almost no white collar jobs outside the banking sector. When there are multiple university graduates competing for a part-time job at the local supermarket, something is horribly wrong.