The wall street journal estimates that for a 100 seat airliner, 30% of the cost of a flight is fuel. And another 14% is govt fees and taxes. Thus if batteries let you get cheaper fuel, don't know if thats true, then there's a large margin for cost savings. And if the gov't were willing to kick back taxes for not polluting the upper atmosphere. Then there's an even greater margin. So there's a powerful incentive to come up with electric power aviation if the total cost of ownership for electric power can be achieved.
Denver internation airport occupies over 10^8 sq meters. Solar cells have peak efficiencies around 15% but lets derate that. so if you could get 100 watts of power per meter then that's 10^10 watts. Obviously you can't use the whole airport area, and modulo all the other issues with solar power and battery round trip efficiency.
a flying 737 plane uses about 750 gallons per hour. thats 28 443 206.8 watts if you assume every BTU is converted to kinetic energy. Perhaps jets are wasteful and electric motor planes are less wasteful? I would guess so but don't know how to derate that.
Thus in raw numbers that 10^10 could power 350 aircraft. Since batteries have loses assume 75% of that is more practical. Still that's more than the number of aircraft taking off per hour.
So the numbers for the energy requirmements seem plausible. Thus perhaps it comes down to weight, safety and how fast you can charge the batteries. These are all technological issues which while formidable may not be insoluble.
jet fuel is about 42MJ/kg. the current best flow battery is about 5MJ/kg. But recent advances suggest this could rise 10 fold in the near future. Flow batteries have been made with >99% energy recovery if I read the literature correctly. Now not all of these charateristics are achieved in the same designs and scaling these can be an issue.
Thus technologically it seem plausible one could store electric energy at the same weight density as jet fuel
Here's my biggest anxiety. Its kinda overwhelming because it constantly is reminding me of it self.
I just switched to google chrome from safari and firefox after those two kept giving me the spinning wheel of eternal delay. But now all of a sudden everything I google is showing up as a freaking ad. the exact parts for my bike every where I go. I feel like I'm being followed. I try logging out of my google account but no matter. And when I log into my computer at work-- a totally separate machine-- wham there they are again.
this is what is freaking me out. Gonna try opera I think. they have intrinsic ad blocking. But I figure this just means every url I go to is stored on some chinese military server.
How can I get a browser that can still do auto-suggest but has a less creepy mothership policy? if I point my search engine to duck-duck go will the auto-suggest go there too? or does it have a different home? Is there a privacy conscious DNS?
Help I'm freaking out! I actually think this is a better fear than ISIS
Let's get back to the 50's and 60's when alien abduction and the dreaded anal probe were the things to fear. That an nuclear annihilation and communist dominos.
Sorry, I tried to make this the first post but my raspberry pi too so long to load the page I had to switch over to my $39 kindle and it took me a while to tap in these words.
Apple should start selling Xintong brand anal leakage plugs and Tiandi penis perforators. I doubt that company has trademarked their name for those products in china.
If you change bits in the past you just erased information.
Another way of saying this is to imagine the limit case. Imagine you were to "write down" the quantum state of the entire universe in the past and try to store that information in the present. The size of your "note" pad would be exactly equal to the size of the universe. That is to store that in the present your would literally have to bit erase the present and over write it with the past's state.
it's equivalent to saying you can't store 2Terrabytes on a 1 gigabyte drive.
therefore to store the past in space smaller than the universe you need to compress the data in a lossy way.
Bitcoin, in it's raw form, is the most traceable currency in existence. Thus if one is planning to engage in clandestine activity it might be unwise to set up a link between pirate bay's public key and your private key. Such a link would exist for all time. So if at any time your key get's linked to a real identity because for example you order a pizza ten years from now or the credit card you used to buy the bit coins from Mt Gox is in Mt. Gox's records under control of the Japanese police, then you are linked to Pirate Bay.
The saving grace I supposed it that in itself is not a crime. But that's not what on your mind if you were hoping nobody finds out.
You could of course use some tumbler to launder the transaction but then you are trusting the tumbler company.
Someday we'll all be able to buy a disposable bitcoin gift card in the super market with cash but until then there's always possible way to trace it back to you (in most cases).
I'm just typing this before I crawl into my Primer tube at the storage depot to take a peak if FTL works in the future.
Actually there's an interesting proof by David Wolpert that this sort of thing can't work the way you think it can. It sort of goes like like this in rough outline. There's only so much information that the state of the universe can encode. If you import information from another time frame to the current time frame you have to lose some information. He goes on to argue that information transport from the past, which is immutable, to the future must be lossy. So you can't send information outside the light cone faster with perfect fidelity. This is not the same as a lossy channel-- which can use error correction to encode perfect transport.
150 people? How do 150 people even work on one person. You can't even get them all in the same room. But if you are liberally counting then getting your appendix out probably involves 150 people when you count the pharmacy staff, the guy that keeps the computer network running, and the people who sterilize the operating room...
Perhaps it would be simpler to graft the head on some other mammal. You could genetically engineer a humanized immunosuppressed animal, say a horse or a sheep. Humanized mice have been created to grow human compatible tissue so this isnt far fetched. By using clones and carefully raising them under highly identical conditions in a artifiial womb you could create more reproducible neural patterns in the bodies making it easier to learn which neuron controls what activitiy. Perhaps you could even train those neurons ahead of time to be adapted to the neural spiking patterns of the human head.
Then you graft the human head onto it and poof you are a centaur with a horse sized dick.
It seems like a better idea, that would have to work if the current plan will work, would be to graft the head onto a healthy fully functional human. That is you get a human with two heads. One head is already fully integrated to the body. That's important because your body depends on an autonomic nervous system to regulate it. Even if it is true that the new head could learn to control the body's mucles-- eventually-- its not going to work out of the gate. SO the body is going to die or be on life support while things rewire. And I would wonder how a body on life support even gets the feedback it needs to engage in some neural plasticity.
On the other hand if you just graft the head and don't bother with the whole spinal cord thing then you have a lot more possibilities. The new head gets fed by a healthy working body. You might need to step up glucose production to handle two heads but I think that's within our current dynamic range.
Thus you could carry your mom or dad's head around on your shoulder.
You could then try to connect their spine to some other neural interface, either indirectly through say some strips of chest muscle that then control some electrical interface or directly to an electrical interface. Either way, you have the means to control some mechanical arms so the head at least has something it can do besides go for a ride.
Things like speech might be a problem till you figure out how to get an airway, throat, and the anchor points for jaw and tongue working right, but in the mean time you could steven hawking it with some eyebrow muscles or eye twitches.
Sees a lot more plausible and they already have done this with dogs.
I've never fully understood how the thermodynamics works out when you run the heat pump in the counterituidive direction.
Normally one uses a heat pump to take heat from a hot object and transport it to a cold object. this is intuitively obvious. the heat pump is, logically, just like a fan accelerating the transport of what was going to happen eventually anyhow.
I also can see how these can work past that logical point when you are using it as an airconditioner. It creates a cold object in the room, colder than the room, and puts a hot oject outside that is hotter than the outside air. Here one is going past the point of "what was going to happen anyhow" and actually pumping heat from the room to a hotter object outside.
the key take home point here however is this takes energy. The total heat you are dumping outside is MORE than the heat you extracted inside. This is the sum of the inside heat plus the heat of the work you used.
Okay so far so good. Now when it comes to heating the house how does this become more efficienct than just using the electricity you would have powered the pump with to heat the house directly (resistive heating)? This I cant see. is there an easy way to see how one gains efficiency by pumping heat out of a cold object to the hot side, over the direct resistive heating?
Bell's theorem only outlaws local hidden variables. Bell himself is a proponent of global hidden variables. In a simulation hidden variables can easily be global.
If you are living in a simulation then somewhere the is also a set of player avatars. And guess what, they are not playing code monkey's. They are people like Steve Jobs or Prince. Gliteratti. Your highest purpose in life is to be a groupie to some rock star. Seriously. Anything else and you are a Orc in Warcraft.
The laws of physics make sense in a simulation. Pixelation for example is the same as the law of diffraction. quantumness is the fact that textures are calculated from hidden variables and only instantiated when you actually look.
The question is, does the real world have the same laws of physics as ours?
I thought it said it translates text "into" a photo. Like I could ram text form some book description into it and get a visual image. Which would be awesome--- or maybe it would be.
And them if you had the reverse, something converting photos to text you could lock the two in a loop and see what happened.
You'd probable converge to a picture of a banana or maybe goatse if it tried to learn from the internet.
Slashdot Mirror
how does it even apply here? What make it a unicorn?
https://en.wikipedia.org/wiki/...
Obviously I ignored that takeoffs use a lot of fuel. But that's factors of 2 and I was just roughing it out to orders of magnitude.
The wall street journal estimates that for a 100 seat airliner, 30% of the cost of a flight is fuel. And another 14% is govt fees and taxes. Thus if batteries let you get cheaper fuel, don't know if thats true, then there's a large margin for cost savings. And if the gov't were willing to kick back taxes for not polluting the upper atmosphere. Then there's an even greater margin. So there's a powerful incentive to come up with electric power aviation if the total cost of ownership for electric power can be achieved.
Denver internation airport occupies over 10^8 sq meters. Solar cells have peak efficiencies around 15% but lets derate that. so if you could get 100 watts of power per meter then that's 10^10 watts. Obviously you can't use the whole airport area, and modulo all the other issues with solar power and battery round trip efficiency.
a flying 737 plane uses about 750 gallons per hour. thats 28 443 206.8 watts if you assume every BTU is converted to kinetic energy. Perhaps jets are wasteful and electric motor planes are less wasteful? I would guess so but don't know how to derate that.
Thus in raw numbers that 10^10 could power 350 aircraft. Since batteries have loses assume 75% of that is more practical. Still that's more than the number of aircraft taking off per hour.
So the numbers for the energy requirmements seem plausible. Thus perhaps it comes down to weight, safety and how fast you can charge the batteries. These are all technological issues which while formidable may not be insoluble.
jet fuel is about 42MJ/kg. the current best flow battery is about 5MJ/kg. But recent advances suggest this could rise 10 fold in the near future. Flow batteries have been made with >99% energy recovery if I read the literature correctly. Now not all of these charateristics are achieved in the same designs and scaling these can be an issue.
Thus technologically it seem plausible one could store electric energy at the same weight density as jet fuel
Here's my biggest anxiety. Its kinda overwhelming because it constantly is reminding me of it self.
I just switched to google chrome from safari and firefox after those two kept giving me the spinning wheel of eternal delay. But now all of a sudden everything I google is showing up as a freaking ad. the exact parts for my bike every where I go. I feel like I'm being followed. I try logging out of my google account but no matter. And when I log into my computer at work-- a totally separate machine-- wham there they are again.
this is what is freaking me out. Gonna try opera I think. they have intrinsic ad blocking. But I figure this just means every url I go to is stored on some chinese military server.
How can I get a browser that can still do auto-suggest but has a less creepy mothership policy? if I point my search engine to duck-duck go will the auto-suggest go there too? or does it have a different home? Is there a privacy conscious DNS?
Help I'm freaking out! I actually think this is a better fear than ISIS
Let's get back to the 50's and 60's when alien abduction and the dreaded anal probe were the things to fear. That an nuclear annihilation and communist dominos.
Sorry, I tried to make this the first post but my raspberry pi too so long to load the page I had to switch over to my $39 kindle and it took me a while to tap in these words.
what does a program look like
He's not dead yet.
Apple should start selling Xintong brand anal leakage plugs and Tiandi penis perforators. I doubt that company has trademarked their name for those products in china.
If you change bits in the past you just erased information.
Another way of saying this is to imagine the limit case. Imagine you were to "write down" the quantum state of the entire universe in the past and try to store that information in the present. The size of your "note" pad would be exactly equal to the size of the universe. That is to store that in the present your would literally have to bit erase the present and over write it with the past's state.
it's equivalent to saying you can't store 2Terrabytes on a 1 gigabyte drive.
therefore to store the past in space smaller than the universe you need to compress the data in a lossy way.
bada boom. I'll be here all week. Try the meat loaf
They should ask people to donate to their favorite charity instead of them. No links.
Bitcoin, in it's raw form, is the most traceable currency in existence. Thus if one is planning to engage in clandestine activity it might be unwise to set up a link between pirate bay's public key and your private key. Such a link would exist for all time. So if at any time your key get's linked to a real identity because for example you order a pizza ten years from now or the credit card you used to buy the bit coins from Mt Gox is in Mt. Gox's records under control of the Japanese police, then you are linked to Pirate Bay.
The saving grace I supposed it that in itself is not a crime. But that's not what on your mind if you were hoping nobody finds out.
You could of course use some tumbler to launder the transaction but then you are trusting the tumbler company.
Someday we'll all be able to buy a disposable bitcoin gift card in the super market with cash but until then there's always possible way to trace it back to you (in most cases).
I'm just typing this before I crawl into my Primer tube at the storage depot to take a peak if FTL works in the future.
Actually there's an interesting proof by David Wolpert that this sort of thing can't work the way you think it can. It sort of goes like like this in rough outline. There's only so much information that the state of the universe can encode. If you import information from another time frame to the current time frame you have to lose some information. He goes on to argue that information transport from the past, which is immutable, to the future must be lossy. So you can't send information outside the light cone faster with perfect fidelity. This is not the same as a lossy channel-- which can use error correction to encode perfect transport.
150 people? How do 150 people even work on one person. You can't even get them all in the same room. But if you are liberally counting then getting your appendix out probably involves 150 people when you count the pharmacy staff, the guy that keeps the computer network running, and the people who sterilize the operating room...
Perhaps it would be simpler to graft the head on some other mammal. You could genetically engineer a humanized immunosuppressed animal, say a horse or a sheep. Humanized mice have been created to grow human compatible tissue so this isnt far fetched. By using clones and carefully raising them under highly identical conditions in a artifiial womb you could create more reproducible neural patterns in the bodies making it easier to learn which neuron controls what activitiy. Perhaps you could even train those neurons ahead of time to be adapted to the neural spiking patterns of the human head.
Then you graft the human head onto it and poof you are a centaur with a horse sized dick.
It seems like a better idea, that would have to work if the current plan will work, would be to graft the head onto a healthy fully functional human. That is you get a human with two heads. One head is already fully integrated to the body. That's important because your body depends on an autonomic nervous system to regulate it. Even if it is true that the new head could learn to control the body's mucles-- eventually-- its not going to work out of the gate. SO the body is going to die or be on life support while things rewire. And I would wonder how a body on life support even gets the feedback it needs to engage in some neural plasticity.
On the other hand if you just graft the head and don't bother with the whole spinal cord thing then you have a lot more possibilities. The new head gets fed by a healthy working body. You might need to step up glucose production to handle two heads but I think that's within our current dynamic range.
Thus you could carry your mom or dad's head around on your shoulder.
You could then try to connect their spine to some other neural interface, either indirectly through say some strips of chest muscle that then control some electrical interface or directly to an electrical interface. Either way, you have the means to control some mechanical arms so the head at least has something it can do besides go for a ride.
Things like speech might be a problem till you figure out how to get an airway, throat, and the anchor points for jaw and tongue working right, but in the mean time you could steven hawking it with some eyebrow muscles or eye twitches.
Sees a lot more plausible and they already have done this with dogs.
How do you spend 20 million on this? I'm skeptical. For 20 million I'd expect to get a head upgrade to go with the body upgrade.
I've never fully understood how the thermodynamics works out when you run the heat pump in the counterituidive direction.
Normally one uses a heat pump to take heat from a hot object and transport it to a cold object. this is intuitively obvious. the heat pump is, logically, just like a fan accelerating the transport of what was going to happen eventually anyhow.
I also can see how these can work past that logical point when you are using it as an airconditioner. It creates a cold object in the room, colder than the room, and puts a hot oject outside that is hotter than the outside air. Here one is going past the point of "what was going to happen anyhow" and actually pumping heat from the room to a hotter object outside.
the key take home point here however is this takes energy. The total heat you are dumping outside is MORE than the heat you extracted inside. This is the sum of the inside heat plus the heat of the work you used.
Okay so far so good. Now when it comes to heating the house how does this become more efficienct than just using the electricity you would have powered the pump with to heat the house directly (resistive heating)? This I cant see. is there an easy way to see how one gains efficiency by pumping heat out of a cold object to the hot side, over the direct resistive heating?
Bell's theorem only outlaws local hidden variables. Bell himself is a proponent of global hidden variables. In a simulation hidden variables can easily be global.
If you are living in a simulation then somewhere the is also a set of player avatars. And guess what, they are not playing code monkey's. They are people like Steve Jobs or Prince. Gliteratti. Your highest purpose in life is to be a groupie to some rock star. Seriously. Anything else and you are a Orc in Warcraft.
The laws of physics make sense in a simulation. Pixelation for example is the same as the law of diffraction. quantumness is the fact that textures are calculated from hidden variables and only instantiated when you actually look.
The question is, does the real world have the same laws of physics as ours?
what about rooftop gardens
When I try to translate the article it just reads
Malkovitch Malkovitch Malkovitch
I thought it said it translates text "into" a photo. Like I could ram text form some book description into it and get a visual image. Which would be awesome--- or maybe it would be.
And them if you had the reverse, something converting photos to text you could lock the two in a loop and see what happened.
You'd probable converge to a picture of a banana or maybe goatse if it tried to learn from the internet.