you do know the reason why "hot air floats" do you? it's because it expands, and therefore has lower density. So in order to make a 'concrete balloon', your concrete sphere has to be elastic enough to expand when you heat it. concrete is not really that flexible.
or to translate this technobabble in something easier:
- "oh, like putting too much air in a balloon?"
- "indeed, but in this case the balloon is made of concrete"
well... actually it is relatively easy, and mathematically not extremely different from classcial physics. Basically you write a 'h' in some places where there used to be a '0', and that apparently has all this implications as wave/particle duality, uncertainty principle, observing = changing, etc...
A bit hard to imagine, and sometimes counterintuitive, and the calculations can be quite some work (although QED and Feynman diagrams etc has made a lot of the calculations a lot easier. Make the diagram, for every line and knot in that diagram substitute a term in your equation, et voila!). It's actually a very beautiful theory. While the superstring stuff still remains a bit vague and complicated.
a) Einstein didn't shun quantum mechanics, in fact he was one of the people who invented QM
b) it didn't take ages to make useful predictions, it made useful predictions starting from day 1
if string theory is disproven, then we also know something more: the GUT is not string theory, ergo we need to direct our energy towards finding another theory.
string theory is kinda unelegantly difficult, so a lot of people don't really want it to be true.
The mushroom institute of the State Academy of Sciences has achieved a lot of successes in scientific research, which are helpful towards the improvement of dietary life.
They make it possible to popularize and intensify the mushroom production without much effort to suit the natural and climate features of Korea and the raw-materials and cultivation conditions. The researchers there are striving to introduce the technologies on an expansion basis.
In particular, the agaric cultivation technology in a semi-vaulted greenhouse is popular, with which a large quantity of mushroom can be produced even in the temperature below zero.
They made quality supplementary nutrients and substrate ferment with deposit of sewage from pig farms, which considerably increase the mushroom yield.
The researchers have completed the method of cultivating agaric with waste matters after its cultivation as the main raw materials and proved successful in the research into introducing two-crop farming of mushroom.
This method, which doubles the utility rate of raw-materials, brings about a great huge profit upon its application.
Nope, doesn't affect this.
The speed at which a part of the universe expands depends on the distance from us. it's about 70 (km/s) / Mpc
(google Hubble's Law)
Which means that distant things fly faster away from us than closer things.
But the effect this article talks about, affects both photons in exactly the same way, so it would have no influence on the measurement of Hubble's constant.
it's actually kinda the same effect.
space is not empty, it's just "almost empty". The transition from atmosphere to (solar) space is a transition from "a lot of gas" to "not a lot of gas, but some atoms here and there".
The transition between solar medium and interstellar is also a transition to a region with a smaller amount of atoms and molecules per volume. Same effect, but a bit smaller.
It just means there's a small correction that has to be made if you need extremely precise measurements. For most data the difference would be orders of magnitude too small to notice.
And you don't need to redo the original measurements, just subtract the Evil of Axis once we know a bit more about how this Axis of Evil influences our data.
No, it just means there's an extra factor that influences the images Planck will make. We just need to find out what the influence is of this extra factor, and then delete that factor from the images Planck makes.
Planck can make the images now, and we can compensate for the Axis of Evil afterwards.
A nice plot of the number of cases / deaths made by swine flu.
http://www55.wolframalpha.com/input/?i=+swine+flu
Alpha could be useful for getting plots like these, that are hard to find in newspapers (where they usually only mention the current amount, not how it evolves)
your old brain scanner is probably an MRI, PET or SPECT scanner, which is a big and expensive machine. 1-2 million dollars.
the scanner they probably use in this article will be a couple of orders of magnitude cheaper.
Slashdot Mirror
you do know the reason why "hot air floats" do you? it's because it expands, and therefore has lower density. So in order to make a 'concrete balloon', your concrete sphere has to be elastic enough to expand when you heat it. concrete is not really that flexible.
or to translate this technobabble in something easier:
- "oh, like putting too much air in a balloon?"
- "indeed, but in this case the balloon is made of concrete"
A paper machete? Ever been to the jungle?
well... the article says it could be "extended up to low Earth orbit at 200 kilometres"...
so you suggest we inflate it with vacuum? ...
From The Article: "He calculates the tower could be extended up to low Earth orbit at 200 kilometres."
Actually, it would be kinda fun if you could just take the elevator to get up to the space station.
Apparently someone forgot to RTFS, because it clearly SAID it would be bigger dan 100m in diameter: "230 meters in diameter"
Because quantum mechanics is so elegantly easy?
well... actually it is relatively easy, and mathematically not extremely different from classcial physics. Basically you write a 'h' in some places where there used to be a '0', and that apparently has all this implications as wave/particle duality, uncertainty principle, observing = changing, etc...
A bit hard to imagine, and sometimes counterintuitive, and the calculations can be quite some work (although QED and Feynman diagrams etc has made a lot of the calculations a lot easier. Make the diagram, for every line and knot in that diagram substitute a term in your equation, et voila!). It's actually a very beautiful theory. While the superstring stuff still remains a bit vague and complicated.
a) Einstein didn't shun quantum mechanics, in fact he was one of the people who invented QM b) it didn't take ages to make useful predictions, it made useful predictions starting from day 1
if string theory is disproven, then we also know something more: the GUT is not string theory, ergo we need to direct our energy towards finding another theory. string theory is kinda unelegantly difficult, so a lot of people don't really want it to be true.
"Guo's laser unleashes as much power as the entire grid of North America... "
so to make a 100Watt lamp, you need a Gigawatt laser?
so? pilots and astronauts aren't really the most down-to-earth people...
I'm a bit confused (confuced?) now. tvlicenSing.co.uk talks about licenCes.
maybe you should stop visiting their blogs then...?
...but if N-Korea has nukes, it will not be invaded by the US, ergo no US troops next door to China.
*cough* North Korea is not part of the USA, ergo doesn't celebrate Memorial Day. *cough*
More information about this can be found on the official news website of North Korea:
http://www.kcckp.net/en/news/news_view.php?6+510
New Mushroom Cultivation Technologies Developed
The mushroom institute of the State Academy of Sciences has achieved a lot of successes in scientific research, which are helpful towards the improvement of dietary life.
They make it possible to popularize and intensify the mushroom production without much effort to suit the natural and climate features of Korea and the raw-materials and cultivation conditions. The researchers there are striving to introduce the technologies on an expansion basis.
In particular, the agaric cultivation technology in a semi-vaulted greenhouse is popular, with which a large quantity of mushroom can be produced even in the temperature below zero.
They made quality supplementary nutrients and substrate ferment with deposit of sewage from pig farms, which considerably increase the mushroom yield.
The researchers have completed the method of cultivating agaric with waste matters after its cultivation as the main raw materials and proved successful in the research into introducing two-crop farming of mushroom.
This method, which doubles the utility rate of raw-materials, brings about a great huge profit upon its application.
actually, before the big bang, "here" (space) didn't exist yet. "before the big bang" (time) also didn't exist.
Nope, doesn't affect this. The speed at which a part of the universe expands depends on the distance from us. it's about 70 (km/s) / Mpc (google Hubble's Law) Which means that distant things fly faster away from us than closer things. But the effect this article talks about, affects both photons in exactly the same way, so it would have no influence on the measurement of Hubble's constant.
it's actually kinda the same effect. space is not empty, it's just "almost empty". The transition from atmosphere to (solar) space is a transition from "a lot of gas" to "not a lot of gas, but some atoms here and there". The transition between solar medium and interstellar is also a transition to a region with a smaller amount of atoms and molecules per volume. Same effect, but a bit smaller.
And with 'Evil of Axis' i mean 'Axis of Evil' :-)
Of course not.
It just means there's a small correction that has to be made if you need extremely precise measurements. For most data the difference would be orders of magnitude too small to notice.
And you don't need to redo the original measurements, just subtract the Evil of Axis once we know a bit more about how this Axis of Evil influences our data.
No, it just means there's an extra factor that influences the images Planck will make. We just need to find out what the influence is of this extra factor, and then delete that factor from the images Planck makes.
Planck can make the images now, and we can compensate for the Axis of Evil afterwards.
A nice plot of the number of cases / deaths made by swine flu. http://www55.wolframalpha.com/input/?i=+swine+flu Alpha could be useful for getting plots like these, that are hard to find in newspapers (where they usually only mention the current amount, not how it evolves)
You mean like the 'Fighting Dukaki' in Futurama?
your old brain scanner is probably an MRI, PET or SPECT scanner, which is a big and expensive machine. 1-2 million dollars. the scanner they probably use in this article will be a couple of orders of magnitude cheaper.