Going to college has intangible benefits, and that means you are less likely to do stupid stuff like crack cocaine, unplanned parenthood, etc. After going to college, you have a better clue of how the world works and that may, or may not, help you survive and succeed in it. You can go to college and still do stupid stuff, so this argument of "self improvement" isn't always good.
The tangible benefit of going to college is that you are better in a certain trade. If you went to a good college, you are not simply trained, you have an actual deeper understanding of the trade. To cite an example that I'm familiar with, anyone that works with compressed gases knows that when a compressed gas discharges to the atmosphere, it gets colder. If you studied fluid dynamics and thermodynamics, you know why that happens and you can even predict how much colder it will get. The guy that worked with compressed CO2 for 5 years will have just a "feeling" for it, and that kind of "feeling" won't get us to the stars.
Now, if that deeper understanding of the trade will translate to economic benefit, that depends on the society you are in. Sadly for my american friends, your society doesn't value that sort of knowledge as it used to. Maybe you need another USSR and terrorism isn't cutting to it, maybe the american dream succumbed to greed, idk. Here in Brazil, the trend for economic value of knowledge is certainly up.
PS.: there are 3 ways to explain why gases get colder when decompressed to an open environment: thermal energy is transformed into kinetic energy; or the gas suffers an adiabatic decompression, and it cools because it exerts work on the surrounding air; or if you consider temperature as random movement of the atoms, when you align that movement to a certain direction, the random movement of the particles must decrease to keep the energy of each particle constant. Number 3 is just a fancy way of saying number 1, though.
If this goes off, Germany won't have much trouble shutting down their nuclear plants. Solar has the potential to power the entire world, even with current efficiencies. Direct conversion of solar to eletricity is good for small devices only, if you want to generate MWs with low cost and environmental impact you want to boil water and use the good ol turbines.
What we need is good transmission lines (those guys want to do it with DC lines, but a hot superconductor would be ideal), political stability, and people willing to work in desertic areas. As for the night time, there are ways of storing the thermal energy generated during the day.
Renewables are more expensive and pesky than oil, and it is not the magic bullet of fusion power, but yes, we can stop burning oil and coal and live just fine.
"To know and not to know, to be conscious of complete truthfulness while telling carefully constructed lies, to hold simultaneously two opinions which cancelled out, knowing them to be contradictory and believing in both of them, to use logic against logic, to repudiate morality while laying claim to it, to believe that democracy was impossible and that the Party was the guardian of democracy, to forget, whatever it was necessary to forget, then to draw it back into memory again at the moment when it was needed, and then promptly to forget it again, and above all, to apply the same process to the process itself -- that was the ultimate subtlety; consciously to induce unconsciousness, and then, once again, to become unconscious of the act of hypnosis you had just performed. Even to understand the word 'doublethink' involved the use of doublethink."
If you boil water at 4 MPa, with a intial temperature of 33C for the liquid and 250C for the steam, the enthalpy change is around 2,662 MJ/Kg. So that's 1,052 ton of water per SECOND. In a day that is 90983 cubic meters of water, or 36 olympic pools
That's why steam turbines are always near rivers or the sea, a heat sink is necessary. But normally the sea water just cools the steam of the process, for many reasons the water from the sea is inappropriate to boil. One of the reasons is the salt in it.
If the steam doesn't carry any salt with it, the 90983 cubic meters of water that boiled will leave 3,181 tons of salt every day.
I hope that salt isn't depositing over the fuel rods. I don't know what could happen if the fuel rods are under, let's say, 5 meters of salt.
Maybe after wikileaks the USA government will think twice before opening up another concentration camp (guantanamo) or invading a country for oil (http://anz.theoildrum.com/node/4675). Or at least be more discrete about it. That might help with the terrorism thing.
And when it comes to data security, anyone inside an organization should have easy access only to the data one *needs*. Access to unusual information, but to which one is entitled to know, should be easily granted, but monitored.
Otherwise, please explain to me why a soldier in Afghanistan should have automatic access to Venezuelan cables from the 80s.
1-Get a cell registered to someone who doesn't know you (bonus points if it is registered to someone who knows the victims, extra bonus points if it is registered to the person being framed). If you're a cop, that should be cake.
2-Drive to the house of the person you want to frame, and call victim number two a few times with a voice synthesizer. Use the anonymous function, which is really only anonymous to the person receiving the call.
3-Do something nasty to victim number two, carrying the phone to the crime scene. (killing would be ideal)
4-Put a password to block the cell phone. Go to the framed guy's house and drop the cell in his mail box, so he gets his fingerprints on it.
5-Drop the synthesizer in his trash can during the night.
6-Tip the police before his trash is collected.
The framed guy and victim number two would have to have some previous grievance between them, but that would be all.
If your employees aren't extroverts, chances are they won't change. Maybe the wrong guy was chosen for the job, maybe you just have to learn to work with people you don't identify with.
It is in the best interest of your employees to have a good relationship with everyone, but forced socialization is shallow, to say it kindly.
If somebody doesn't fit into a work environment, that's a good indication that he/she should really change jobs.
That's the case when the energy of building a new one is more than the double of the energy consumed by the total lifespan of the laptop. (remember that 70% is used to manufacture, 30% to operate it). Even if a newer one consumes zero energy, the manufacturing process will offset that.
As a mechanical engineer, I can tell you that bending, cutting or melting metal requires a LOT of energy. Try manufacturing a screw from a piece of metal using just simple tools and you will understand it.
If you want precision, like in a processor chip, the process becomes much less energy efficient.
Plastics are much cheaper to handle; I have no idea about sylicon though.
You can "see" black holes by the bending light suffers when passing by. It's called gravitational lensing.
And I'm sorry to inform you, there are no permanent stuff in the universe. If you can observe it (interact with it), you can mess with it (increase its entropy).
Solar can be a base load power generator. The weather in desertic areas is reliable enough, and the heat absorbed during the day can be stored in molten salt for the night time.
Tidal energy, though with a much smaller potential, also is reliable enough for base load power generation. The energy generated during the tides could be stored by pumping water up some sort of container (just a walled portion of the sea).
I'm not a nuclear engineer, but why can't they remove the fuel rods instead of trying to cool them on site? That would not be a bad idea for the reactors with compromised containment. A meltdown without containment would be a near Chernobyl disaster (what an awful metric).
The reactor must have some sort of rod extraction device, since they have to change the rods ocasionally. Maybe that device wasn't damaged by the quake. Grab a lead box with a reliable cooling system, put it on top of a truck and use robots to drop the rod inside the box. Of course actually doing it would not be so simple, so feel free to add your knowledge/insight.
The dome does reflect light in the video. The question is that the reflection is completely diffuse and not specular. A gold dome should have at least some specular reflection; this is sign of video tampering.
This information could be used by the customers themselves. Worried parents tracking their children, employers tracking company phones (everyone that works outdoors could be tracked, for coordination and evaluation purposes).
It sucks, I know. But this is doable, and why would a customer be forbidden to track his own propriety?
It is possible to use mud as a drilling fluid; it has a higher density and builds a higher pressure down the hole. That is how oil wells are drilled. Another possible strategy is to pump the drilling fluid with a very high pressure directly on the well head. This will lead to higher pressures downward as well. Naturally, it would be necessary to contain that high pressure on the surface, which may be far too dangerous to be feasible.
Lava is quite dense, so it would lose a lot of pressure as it climbed up the hole, so maybe it wouldnt come up that fast. Human drilled holes are also narrow enough that heat transfer is an issue, so lava would solidify along the walls.
In oil wells, what really messes up is when you hit a pocket of gas trapped down there. But that gas is located with the oil and there shouldnt be any gas in the mantle, so a lava blow out should be easier to contain.
I guess the real challenge will be how to drill a hole with a temperature so high. A high flow of drilling fluid will be necessary to cool the drill, and maybe a water jet cutter would be better suited. Also, the mantle temperature is higher than mentioned in the article.
"In one famous experiment, researchers had subjects watch a movie featuring authentic scenes of live monkeys having their brains scooped out and of children — I kid you not — having their facial skin peeled away in preparation for surgery." Link?
In about 50-80 years, we will stop burning fossil for energy. It will be cheaper to generate that energy through other means, ie nuclear or renewable, so as the demand for oil decreases, it will stabilize a little above the cost of nuclear/renewable. Of course, for certain things we may still be burning fossil, like aviation or in remote areas, but that will just inflate the price a bit.
We will, however, still use oil as a source material for fabrication. We can sustain a very high price for oil if it is used only for plastics/lubricants.
100-150 years from now, our grandsons will be cursing us for burning oil. It will seem just as stupid as using whale blubber as fuel.
You have little faith on Science, my friend. Luckily governments have better faith, or perhaps they remember best what Science has done to them.
Two hundred years ago, eletricity was a parlor trick. One hundred years later, it changed the world.
One hundred years ago, nuclear research was a futile, cancer inducing mambojambo. Fifty years later, it changed how the leading nations did War.
It's hard to know where the next Deus Ex Machina device will come from, but whoever is pouring more money on Science has a better chance of getting it first.
Slashdot Mirror
In some fields, it's not so easy for specialized workers to find another job. It may even require the worker to move to another country.
How many companies hire aerospace engineers, for example? Or wheat geneticists?
But in this case, yeah, the guy shouldn't have trouble finding another job if he is minimally competent.
Going to college has intangible benefits, and that means you are less likely to do stupid stuff like crack cocaine, unplanned parenthood, etc. After going to college, you have a better clue of how the world works and that may, or may not, help you survive and succeed in it.
You can go to college and still do stupid stuff, so this argument of "self improvement" isn't always good.
The tangible benefit of going to college is that you are better in a certain trade. If you went to a good college, you are not simply trained, you have an actual deeper understanding of the trade.
To cite an example that I'm familiar with, anyone that works with compressed gases knows that when a compressed gas discharges to the atmosphere, it gets colder. If you studied fluid dynamics and thermodynamics, you know why that happens and you can even predict how much colder it will get. The guy that worked with compressed CO2 for 5 years will have just a "feeling" for it, and that kind of "feeling" won't get us to the stars.
Now, if that deeper understanding of the trade will translate to economic benefit, that depends on the society you are in. Sadly for my american friends, your society doesn't value that sort of knowledge as it used to. Maybe you need another USSR and terrorism isn't cutting to it, maybe the american dream succumbed to greed, idk. Here in Brazil, the trend for economic value of knowledge is certainly up.
PS.: there are 3 ways to explain why gases get colder when decompressed to an open environment: thermal energy is transformed into kinetic energy; or the gas suffers an adiabatic decompression, and it cools because it exerts work on the surrounding air; or if you consider temperature as random movement of the atoms, when you align that movement to a certain direction, the random movement of the particles must decrease to keep the energy of each particle constant. Number 3 is just a fancy way of saying number 1, though.
If this goes off, Germany won't have much trouble shutting down their nuclear plants.
Solar has the potential to power the entire world, even with current efficiencies. Direct conversion of solar to eletricity is good for small devices only, if you want to generate MWs with low cost and environmental impact you want to boil water and use the good ol turbines.
What we need is good transmission lines (those guys want to do it with DC lines, but a hot superconductor would be ideal), political stability, and people willing to work in desertic areas.
As for the night time, there are ways of storing the thermal energy generated during the day.
Renewables are more expensive and pesky than oil, and it is not the magic bullet of fusion power, but yes, we can stop burning oil and coal and live just fine.
"To know and not to know, to be conscious of complete truthfulness while telling carefully constructed lies, to hold simultaneously two opinions which cancelled out, knowing them to be contradictory and believing in both of them, to use logic against logic, to repudiate morality while laying claim to it, to believe that democracy was impossible and that the Party was the guardian of democracy, to forget, whatever it was necessary to forget, then to draw it back into memory again at the moment when it was needed, and then promptly to forget it again, and above all, to apply the same process to the process itself -- that was the ultimate subtlety; consciously to induce unconsciousness, and then, once again, to become unconscious of the act of hypnosis you had just performed. Even to understand the word 'doublethink' involved the use of doublethink."
Now I'm changing my e-mail provider to something outside of US. Any suggestions?
Would you have to cross link atoms if you wanted only traction resistance? A graphene cable would be awesome.
Why would they use inferior technology? Until the Wachowskis created the bullet time, phasers looked cooler on video.
It is pretty much the same reason why every children cartoon hero has a glaring uniform.
An animated hologram is actually a 4D communication. One could argue that color also adds dimensions, but that would humiliate dolphins too much.
If you boil water at 4 MPa, with a intial temperature of 33C for the liquid and 250C for the steam, the enthalpy change is around 2,662 MJ/Kg. So that's 1,052 ton of water per SECOND. In a day that is 90983 cubic meters of water, or 36 olympic pools
That's why steam turbines are always near rivers or the sea, a heat sink is necessary. But normally the sea water just cools the steam of the process, for many reasons the water from the sea is inappropriate to boil. One of the reasons is the salt in it.
If the steam doesn't carry any salt with it, the 90983 cubic meters of water that boiled will leave 3,181 tons of salt every day.
I hope that salt isn't depositing over the fuel rods. I don't know what could happen if the fuel rods are under, let's say, 5 meters of salt.
There are four very distinct things: the lie, the omission, the truth and ALL the truth. :D
Despite spinning an anti-Apple reportage, everything sounds true to me. But is it everything that should be said about Foxconn? Nope.
Maybe after wikileaks the USA government will think twice before opening up another concentration camp (guantanamo) or invading a country for oil (http://anz.theoildrum.com/node/4675). Or at least be more discrete about it. That might help with the terrorism thing.
And when it comes to data security, anyone inside an organization should have easy access only to the data one *needs*. Access to unusual information, but to which one is entitled to know, should be easily granted, but monitored.
Otherwise, please explain to me why a soldier in Afghanistan should have automatic access to Venezuelan cables from the 80s.
1-Get a cell registered to someone who doesn't know you (bonus points if it is registered to someone who knows the victims, extra bonus points if it is registered to the person being framed). If you're a cop, that should be cake.
2-Drive to the house of the person you want to frame, and call victim number two a few times with a voice synthesizer. Use the anonymous function, which is really only anonymous to the person receiving the call.
3-Do something nasty to victim number two, carrying the phone to the crime scene. (killing would be ideal)
4-Put a password to block the cell phone. Go to the framed guy's house and drop the cell in his mail box, so he gets his fingerprints on it.
5-Drop the synthesizer in his trash can during the night.
6-Tip the police before his trash is collected.
The framed guy and victim number two would have to have some previous grievance between them, but that would be all.
If your employees aren't extroverts, chances are they won't change. Maybe the wrong guy was chosen for the job, maybe you just have to learn to work with people you don't identify with.
It is in the best interest of your employees to have a good relationship with everyone, but forced socialization is shallow, to say it kindly.
If somebody doesn't fit into a work environment, that's a good indication that he/she should really change jobs.
If my ISP kindly offered me a good and *free* connection, I wouldn't complain if it was traffic shaped.
That's the case when the energy of building a new one is more than the double of the energy consumed by the total lifespan of the laptop. (remember that 70% is used to manufacture, 30% to operate it). Even if a newer one consumes zero energy, the manufacturing process will offset that.
As a mechanical engineer, I can tell you that bending, cutting or melting metal requires a LOT of energy. Try manufacturing a screw from a piece of metal using just simple tools and you will understand it.
If you want precision, like in a processor chip, the process becomes much less energy efficient.
Plastics are much cheaper to handle; I have no idea about sylicon though.
You can "see" black holes by the bending light suffers when passing by. It's called gravitational lensing.
And I'm sorry to inform you, there are no permanent stuff in the universe. If you can observe it (interact with it), you can mess with it (increase its entropy).
Solar can be a base load power generator. The weather in desertic areas is reliable enough, and the heat absorbed during the day can be stored in molten salt for the night time.
http://www.desertec.org/
Tidal energy, though with a much smaller potential, also is reliable enough for base load power generation. The energy generated during the tides could be stored by pumping water up some sort of container (just a walled portion of the sea).
I'm not a nuclear engineer, but why can't they remove the fuel rods instead of trying to cool them on site? That would not be a bad idea for the reactors with compromised containment. A meltdown without containment would be a near Chernobyl disaster (what an awful metric).
The reactor must have some sort of rod extraction device, since they have to change the rods ocasionally. Maybe that device wasn't damaged by the quake.
Grab a lead box with a reliable cooling system, put it on top of a truck and use robots to drop the rod inside the box. Of course actually doing it would not be so simple, so feel free to add your knowledge/insight.
The dome does reflect light in the video. The question is that the reflection is completely diffuse and not specular. A gold dome should have at least some specular reflection; this is sign of video tampering.
Check one of the videos in your link:
http://www.youtube.com/watch?v=uKR1OIQFsFg
It shows how to add diffuse reflections in a picture.
I gotta say this is a nice hoax video; I didn't know it was so easy to add stuff in a video so convincingly
This information could be used by the customers themselves. Worried parents tracking their children, employers tracking company phones (everyone that works outdoors could be tracked, for coordination and evaluation purposes).
It sucks, I know. But this is doable, and why would a customer be forbidden to track his own propriety?
It is possible to use mud as a drilling fluid; it has a higher density and builds a higher pressure down the hole. That is how oil wells are drilled.
Another possible strategy is to pump the drilling fluid with a very high pressure directly on the well head. This will lead to higher pressures downward as well. Naturally, it would be necessary to contain that high pressure on the surface, which may be far too dangerous to be feasible.
Lava is quite dense, so it would lose a lot of pressure as it climbed up the hole, so maybe it wouldnt come up that fast. Human drilled holes are also narrow enough that heat transfer is an issue, so lava would solidify along the walls.
In oil wells, what really messes up is when you hit a pocket of gas trapped down there. But that gas is located with the oil and there shouldnt be any gas in the mantle, so a lava blow out should be easier to contain.
I guess the real challenge will be how to drill a hole with a temperature so high. A high flow of drilling fluid will be necessary to cool the drill, and maybe a water jet cutter would be better suited. Also, the mantle temperature is higher than mentioned in the article.
http://en.wikipedia.org/wiki/Water_jet_cutter
http://en.wikipedia.org/wiki/Mantle_(geology)#Temperature
"In one famous experiment, researchers had subjects watch a movie featuring authentic scenes of live monkeys having their brains scooped out and of children — I kid you not — having their facial skin peeled away in preparation for surgery."
Link?
In about 50-80 years, we will stop burning fossil for energy. It will be cheaper to generate that energy through other means, ie nuclear or renewable, so as the demand for oil decreases, it will stabilize a little above the cost of nuclear/renewable. Of course, for certain things we may still be burning fossil, like aviation or in remote areas, but that will just inflate the price a bit.
We will, however, still use oil as a source material for fabrication. We can sustain a very high price for oil if it is used only for plastics/lubricants.
100-150 years from now, our grandsons will be cursing us for burning oil. It will seem just as stupid as using whale blubber as fuel.
You have little faith on Science, my friend. Luckily governments have better faith, or perhaps they remember best what Science has done to them.
Two hundred years ago, eletricity was a parlor trick. One hundred years later, it changed the world.
One hundred years ago, nuclear research was a futile, cancer inducing mambojambo. Fifty years later, it changed how the leading nations did War.
It's hard to know where the next Deus Ex Machina device will come from, but whoever is pouring more money on Science has a better chance of getting it first.
What about a train moved by cables?
http://en.wikipedia.org/wiki/San_Francisco_cable_car_system