One of the earlier search engines had something like this - there was a live view of (all?) the searches being conducted at the time scrolling by at the bottom of the screen. It was called something like "search voyeur", and it was very interesting.
i just got a D300 - which has a detector very similar to the D90 that you mention. its low light performance is far less satisfactory than the ISO3200 film i used to use. while film does get grainy at high speeds, as you mention, the noise that these detectors (CCD and CMOS) is far uglier. in my experience, film is still superior at low light
the problem with this is that you are assuming that the laser is 100% efficient - which i'm sure it's not. So the power needed would be three to four orders higher than the power delivered by the laser.
One of the advantages of maglev, apart from its high speed, is its high acceleration. So, even over a short course, it can save quite a bit of time, because it can spend more time at high speed. I believe that maglev acceleration is limited more by human frailty/nausea rather than mechanics/power etc.
"Tell me, after being skeptic of an experiment, then trying it time and time again, coming up with the same results...doesn't that eliminate the skepticism?"
If you are a good scientist, repeated experimentation should not eliminate scepticism. It could be that you are confident enough in a theory at a certain level of precision, but that does not mean that the whole "edifice" of a theory is 100% certain.
Just because an experiment yields a certain result consitently, this does not mean that a slightly different experiment (or the same experiment at a different time/place) will give you the same result. (in my lab certain chemical recepies would yield entirely different results in the winter and in the summer - the humidity in the air made a huge difference..)
As far as I see it, there are two huge problems, and the FA did not touch on these at all.
First, as you mention it, is the isotopes. Not all Si atoms have the same mass, and different natural samples have different distributions of the different isotopes. So even if you can count the number of Si atoms, you can't be sure of the mass. I know that the semiconductor industry working on single isotope chips, http://www.scienceblog.com/community/older/2000/C/ 200002512.html, but how "single" is that?
Second, defects, in particular voids. If you have a perfect sphere, there is one configurational state. A SINGLE exlusion defect for a ~28 g sphere will have an Avagadro's number (~10^23) of possible configurations. So the question is, how easy is it to form defects? (very easy, because of the second Law of thermodynamics) So the question becomes, how many defects do you expect to have in a 1 kg sample of Si? Unfortunately, i've forgotten stat mech that lets me calculate that...
what is the definition of slave? is it not a person who is owned by another? i'm not saying that this is good - in fact, this is what makes slavery repugnant. this, however, does not change slaves' (potential) role in an economy.
very nicely put - but in terms of what "traged" actually (or used to) means, and in terms of how Feynman had to submit a "dissenting" voice paper after the inquiry, when he found out the engineers knew that the seals had a real chance of letting go at that temperature...
Slashdot Mirror
If you have no electricity to start with, even a little is a huge improvement. This is not meant for industrialized places.
"Outside of such radical solutions as living in walkable neighborhoods, bicycling, and using mass transit for daily trips"
"radical solutions"? how about, "sensible solutions"?
if the end results are the same, i see no difference
I know at least 10 people who play the banjo...
One of the earlier search engines had something like this - there was a live view of (all?) the searches being conducted at the time scrolling by at the bottom of the screen. It was called something like "search voyeur", and it was very interesting.
you are an idiot
i just got a D300 - which has a detector very similar to the D90 that you mention. its low light performance is far less satisfactory than the ISO3200 film i used to use. while film does get grainy at high speeds, as you mention, the noise that these detectors (CCD and CMOS) is far uglier. in my experience, film is still superior at low light
YAG is yttrium aluminum garnet...
Spoken like a true coward.
furthermore, 'k' is the SI prefix for kilo. K, in SI means kelvin.
spoken like a true coward. fuck you
the problem with this is that you are assuming that the laser is 100% efficient - which i'm sure it's not. So the power needed would be three to four orders higher than the power delivered by the laser.
Well, there was the time that Apple allowed third parties to sell Mac clones, and then totally screwed them when they started outselling Apple...
Quantum dots (and other quan`tum 2D and 3D structures) allow for highly tuned and tuneable electrical and (as you noted) optical properties.
So the big deal is that they are potentially super useful in ANY field that is "electrical" or "optical", which is a lot of fields.
also, gold can easily form amalgams, like with mercury. so it might be a route of entry for other toxins
One of the advantages of maglev, apart from its high speed, is its high acceleration. So, even over a short course, it can save quite a bit of time, because it can spend more time at high speed. I believe that maglev acceleration is limited more by human frailty/nausea rather than mechanics/power etc.
"Tell me, after being skeptic of an experiment, then trying it time and time again, coming up with the same results...doesn't that eliminate the skepticism?"
If you are a good scientist, repeated experimentation should not eliminate scepticism. It could be that you are confident enough in a theory at a certain level of precision, but that does not mean that the whole "edifice" of a theory is 100% certain.
Just because an experiment yields a certain result consitently, this does not mean that a slightly different experiment (or the same experiment at a different time/place) will give you the same result. (in my lab certain chemical recepies would yield entirely different results in the winter and in the summer - the humidity in the air made a huge difference..)
As far as I see it, there are two huge problems, and the FA did not touch on these at all.
/ 200002512.html, but how "single" is that?
First, as you mention it, is the isotopes. Not all Si atoms have the same mass, and different natural samples have different distributions of the different isotopes. So even if you can count the number of Si atoms, you can't be sure of the mass. I know that the semiconductor industry working on single isotope chips, http://www.scienceblog.com/community/older/2000/C
Second, defects, in particular voids. If you have a perfect sphere, there is one configurational state. A SINGLE exlusion defect for a ~28 g sphere will have an Avagadro's number (~10^23) of possible configurations. So the question is, how easy is it to form defects? (very easy, because of the second Law of thermodynamics) So the question becomes, how many defects do you expect to have in a 1 kg sample of Si? Unfortunately, i've forgotten stat mech that lets me calculate that...
i think some of the Saturn stages had internal insulation...
l (the s4b stage)
m
http://www.geocities.com/launchreport/satstg5.htm
http://history.nasa.gov/ap08fj/01launch_ascent.ht
(sorry, not the best links, and i don't know why this was chosen, and apparently forgotten....)
excellent post. thanks very much. tell us more about the bonsai...
"It's competition because they want to sell you the physical DVD and then sell you a digital copy for your ipod."
the irony is that the DVD presumably contains a digital copy to begin with...
actually, microwave energy corresponds to molecular rotations, not vibrations. vibrations happen at higher energies, in the infrared region...
you might also say that the problem with cameras on phones is the LENS.
what is the definition of slave? is it not a person who is owned by another? i'm not saying that this is good - in fact, this is what makes slavery repugnant. this, however, does not change slaves' (potential) role in an economy.
very nicely put - but in terms of what "traged" actually (or used to) means, and in terms of how Feynman had to submit a "dissenting" voice paper after the inquiry, when he found out the engineers knew that the seals had a real chance of letting go at that temperature...