Lets see how the stock market and banks respond to this tomorrow. I wonder if I should pull all my savings.
Jokes apart, this is interesting that they can predict with reasonable accuracy at such large time and distance scales. Do classical newtonian theories work ?
You hear about IBM being involved with the PS3 because of the cell processor, but most people would be surprised to hear that IBM did a lot of the work for the XBOX360 as well.
I wonder if they can sequence the protein segments too (I hope there are some) and we should be able to find more of the links with birds. And most importantly can they isolate DNAs as well ? It has been a while (yeah long time).
Even the electrical wiring has been twisted to reduce electro-magnetic interference.
This is done in all the high precision instruments and the facility in which they are installed. TEMs and electron beam lithography tools often have a separate foundation isolated from the rest of the building to minimize vibration issues.
Probably they should mention about the tight control over temperature, humidity and airflow as well.
I RTFA and it employs two quantum dots to distinguish the direction of the flow. As the article mentions: scientists already know how count single electrons travelling through an individual quantum dot
My question is if I want to measure current (assume an ideal current source) then I will hook it up to this new invention. The mechanism of current in this new measuring device is quantum tunneling. Is there any reason that the current source in question employs the same mechanism. It may still be conventional drift-diffusion with very very low fields (and probably very low mobility). Now when I interface it with this double-quantum device, does the change in mechanism ensures current quantity ? If answer yes, what is the intutive answer. I can understand current continuity when it is drift and diffusion.
I don't think you have done enough homework before posting here
(1) Nanowires are not made the same way as conventional transistors. You have to understand that part carefully because it also illustrates why, despite more than 15 yrs old, there are no carbon nanotube electronics. You have to put them precisely where one wants. A random spaghetti on a wafer is not useful. Thus methods that employ CVD process produce nanowires in all directions. There are some ideas to make them directional, but none of them has been feasible to make 1 billion aligned nanowires. Note the keyword - 1 billion. In university research, making 1 device is more than enough to graduate few students and publish dozen of papers. In industry, cost is the only thing which drives the technology.
(2) Variation: The article does mention that they still don't have any proper method of sorting out uniform nanowires. One of the biggest problem with conventional scaling (Along with power dissipation) is the variability. The 6 sigma variance in parameters can lead to incorrect operation. For Static RAMS (SRAMs, which is used in cache) this is a big problem. I would encourage you to look up papers on nanowires and see the variability. You will be surprised to see that many researchers conveniently ignore it.
(3) Nanowires doesn't necessarily solve the power problem. Yes they are faster, but their volume is smaller too. Do a back of envlope calculation and see the numbers for power densities and explain why would nanowires have less heat dissipation problems.
I am not demeaning this work and the article does mention where this will be useful. It is NOT going to replace silicon electronics but rather augment it. Silicon electronics is not good for flexibile substrates. And most of the flexible 'electronics' is done using amorphous silicon. There it makes perfect sense to use it. Also they mentioned about making sensors. Again in sensors only the sensing part will be based on nanowires and rest of the data processing will be done with conventional CMOS circuits (because it is efficient).
Does anyone have any idea why the small pores have higher flow rate through them ? My classical fluid dynamics class beats me here. Should be something to do with quantum effects at that scale, but can't guess it. Quantization in electronic states makes sense to me, but don't know what it is doing to 'flow dynamics'.
Cool work nevertheless. I wish they could do something with silicon nanowires as silicon is the second most abundant element on earth.
It is not true that they aren't working on 3D technology. It is just that they haven't figured out a mature manufacturable process. In the end, Intel is not there to push Moore's law if it doesn't have economic benefits.
In real estate business there are 3 important factors: Location, Location , Location
In semiconductor industry (which is becoming a commodity), there are 3 factors as well: Cost, Cost, Cost
You mentioned about the heat issue. Yes it is important. But no one said you can't solve it. You can have structures which can distribute heat out (e.g. heat pipes). You can also have circuit techniques which are by default more process tolerant as well as low power (eg. asynchronous circuits). Both solutions wouldn't solve the problem completely, but yes it will be a step ahead. Then why don't do it. Industry still hasn't figured out if the cost to develop these techniques will harness them enough profit as compared to pushing the conventional techniques.
Also know one said that you can't extract 1000 W/cm^2 in ICs. It will just cost quite a bit.
So yes your point is well taken, but don't undermine the industrial goals. Profit comes first.
Being an amature scientist (engineer by profession) I always wonder why the laws in physics be constant as well ? Never got any satisfactory (and comprehensible) answer yet. To certain extent, it is equally important as 'changing' constants as well.
Also I would like to know little more about the error analysis here. A claim like 0.002% should be carefully checked to make sure about the measurement limitations etc.
Readers are directed to another good article (not flooded with scientific jargon).
For those who didn't RTFA, the next paragraph says it all
Given these moves, we're reminded of the scene from Spaceballs when Lord Helemt orders an underling to thrust his ship from light speed to ludicrous speed. "Prepare ship, prepare ship for ludicrous speed. Fasten all seat belts, seal all entrances and exits, close all shops in the mall, cancel the 3-ring circus, secure all animals in the zoo..." shouts the underling.
Does anyone know how you keep all the cores busy ? What kind of ulta-high-bandwidth memory architecture do they use (not clear from architecture) ? What kind of cores are these ? In-order, simple 6-10 state pipleline or more complex ones ? And more importantly, what is the power consumption ?
The reason we are excited because the third number in the sequence of the moments of the Riemann zeta function is 42. It was calculated only few years ago.
Sometimes I just browse through iTunes podcast library for certain keywords (eg literature english) and then sort it by popularity. Many times you will get the better ones (eg from BBC or stanford radio etc) and not some random dude ranting in his basement.
And sometimes I just lurk for questions like these where other users tell about their favorite podcasts and then I go and check them out..
Very cool indeed. I have worked on glass substrates for TFT related applications in my grad studies. I tell you one thing, it is very hard to tell which side is up and which side is down. Many times in the beginning I had put the wafer upside down just to find out it didn't deposit certain thing or etch on the right side. Finally I managed to put a visible mark which would only read correct from one side and got around. Now if you make transparent ICs, how do you go about aligning one layer to another in lithography (common step in IC fabrication). I hope they don't make transparent ICs on transparent substrates - that would be quite a fun.
Running in quantum computers is doing "unitary transformations" and doing measurements on them. So as the article claimed, it is not that you are not doing anything. The only way not to run "it" is by putting it in eigenstate of the system (as well completely isolate it from any external perturbations). If you put it in a mixed state - yes it will evolve with time and then when you do the measurement it will give you "a" eigen state with certain probability. So yes in the end you are still doing measurement which is equally important and consitutes "running" the computer.
From the article I couldn't guess the size of the 8GB microdrive. Anyone has any idea ? One from Lacie is rather big to be tagged along with a cellphone.
Slashdot Mirror
Lets see how the stock market and banks respond to this tomorrow. I wonder if I should pull all my savings. Jokes apart, this is interesting that they can predict with reasonable accuracy at such large time and distance scales. Do classical newtonian theories work ?
Is it me or there are way many too many stories about Flickr recently (including the censorship)? Can I have my Google stories back please. Thanks.
http://www.research.ibm.com/journal/rd/504/topol.h tml
http://domino.watson.ibm.com/comm/pr.nsf/pages/new s.20021111_3d_ic.html
True, but are they quality patents ?
http://www.spectrum.ieee.org/nov06/4699
You hear about IBM being involved with the PS3 because of the cell processor, but most people would be surprised to hear that IBM did a lot of the work for the XBOX360 as well.
IBM did a lot of work for Nintendo WII too.
Office Space
I wonder if they can sequence the protein segments too (I hope there are some) and we should be able to find more of the links with birds. And most importantly can they isolate DNAs as well ? It has been a while (yeah long time).
This is done in all the high precision instruments and the facility in which they are installed. TEMs and electron beam lithography tools often have a separate foundation isolated from the rest of the building to minimize vibration issues.
Probably they should mention about the tight control over temperature, humidity and airflow as well.
My question is if I want to measure current (assume an ideal current source) then I will hook it up to this new invention. The mechanism of current in this new measuring device is quantum tunneling. Is there any reason that the current source in question employs the same mechanism. It may still be conventional drift-diffusion with very very low fields (and probably very low mobility). Now when I interface it with this double-quantum device, does the change in mechanism ensures current quantity ? If answer yes, what is the intutive answer. I can understand current continuity when it is drift and diffusion.
(1) Nanowires are not made the same way as conventional transistors. You have to understand that part carefully because it also illustrates why, despite more than 15 yrs old, there are no carbon nanotube electronics. You have to put them precisely where one wants. A random spaghetti on a wafer is not useful. Thus methods that employ CVD process produce nanowires in all directions. There are some ideas to make them directional, but none of them has been feasible to make 1 billion aligned nanowires. Note the keyword - 1 billion. In university research, making 1 device is more than enough to graduate few students and publish dozen of papers. In industry, cost is the only thing which drives the technology.
(2) Variation: The article does mention that they still don't have any proper method of sorting out uniform nanowires. One of the biggest problem with conventional scaling (Along with power dissipation) is the variability. The 6 sigma variance in parameters can lead to incorrect operation. For Static RAMS (SRAMs, which is used in cache) this is a big problem. I would encourage you to look up papers on nanowires and see the variability. You will be surprised to see that many researchers conveniently ignore it.
(3) Nanowires doesn't necessarily solve the power problem. Yes they are faster, but their volume is smaller too. Do a back of envlope calculation and see the numbers for power densities and explain why would nanowires have less heat dissipation problems.
I am not demeaning this work and the article does mention where this will be useful. It is NOT going to replace silicon electronics but rather augment it. Silicon electronics is not good for flexibile substrates. And most of the flexible 'electronics' is done using amorphous silicon. There it makes perfect sense to use it. Also they mentioned about making sensors. Again in sensors only the sensing part will be based on nanowires and rest of the data processing will be done with conventional CMOS circuits (because it is efficient).
Cool work nevertheless. I wish they could do something with silicon nanowires as silicon is the second most abundant element on earth.
In real estate business there are 3 important factors: Location, Location , Location
In semiconductor industry (which is becoming a commodity), there are 3 factors as well: Cost, Cost, Cost
You mentioned about the heat issue. Yes it is important. But no one said you can't solve it. You can have structures which can distribute heat out (e.g. heat pipes). You can also have circuit techniques which are by default more process tolerant as well as low power (eg. asynchronous circuits). Both solutions wouldn't solve the problem completely, but yes it will be a step ahead. Then why don't do it. Industry still hasn't figured out if the cost to develop these techniques will harness them enough profit as compared to pushing the conventional techniques.
Also know one said that you can't extract 1000 W/cm^2 in ICs. It will just cost quite a bit.
So yes your point is well taken, but don't undermine the industrial goals. Profit comes first.
Also I would like to know little more about the error analysis here. A claim like 0.002% should be carefully checked to make sure about the measurement limitations etc.
Readers are directed to another good article (not flooded with scientific jargon).
How is it too different from a blog thingee ?
A good survey paper listing other efforts (pdf warning).
And more details of the Manchester Amulet processors. Note that Amulet has ARM core.
Given these moves, we're reminded of the scene from Spaceballs when Lord Helemt orders an underling to thrust his ship from light speed to ludicrous speed. "Prepare ship, prepare ship for ludicrous speed. Fasten all seat belts, seal all entrances and exits, close all shops in the mall, cancel the 3-ring circus, secure all animals in the zoo..." shouts the underling.
Does anyone know how you keep all the cores busy ? What kind of ulta-high-bandwidth memory architecture do they use (not clear from architecture) ? What kind of cores are these ? In-order, simple 6-10 state pipleline or more complex ones ? And more importantly, what is the power consumption ?
The reason we are excited because the third number in the sequence of the moments of the Riemann zeta function is 42. It was calculated only few years ago.
Sometimes I just browse through iTunes podcast library for certain keywords (eg literature english) and then sort it by popularity. Many times you will get the better ones (eg from BBC or stanford radio etc) and not some random dude ranting in his basement.
And sometimes I just lurk for questions like these where other users tell about their favorite podcasts and then I go and check them out ..
Very cool indeed. I have worked on glass substrates for TFT related applications in my grad studies. I tell you one thing, it is very hard to tell which side is up and which side is down. Many times in the beginning I had put the wafer upside down just to find out it didn't deposit certain thing or etch on the right side. Finally I managed to put a visible mark which would only read correct from one side and got around. Now if you make transparent ICs, how do you go about aligning one layer to another in lithography (common step in IC fabrication). I hope they don't make transparent ICs on transparent substrates - that would be quite a fun.
Torvalds Explains Dislike For GPLv3
Linus Says No GPLv3 for the Linux Kernel
Wait till MIT hears about it !! :P
You mean this. None of the links seems to be working now :(
Does anyone know what is new here ?
From the article I couldn't guess the size of the 8GB microdrive. Anyone has any idea ? One from Lacie is rather big to be tagged along with a cellphone.