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PCM Progress Report No 4: Brains

7/22/2011 06:32 PM EDT
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JanineLove
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re: PCM Progress Report No 4: Brains
JanineLove   7/22/2011 6:53:14 PM
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I asked Ron Neale to take a look at some of the current work being done in PCM and he took the time to analyze some work being done by Stanford University. Look for more on PCM, with a new progress report coming in a week or two.

e.a.
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re: PCM Progress Report No 4: Brains
e.a.   7/22/2011 11:02:20 PM
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Volatile Memory, are you OK?

resistion
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re: PCM Progress Report No 4: Brains
resistion   7/23/2011 1:10:02 AM
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I think the desired outcome will be foiled by resistance drift. I also wonder if something similar could be accomplished by Flash? If not, the reason(s) would also be important.

R G.Neale
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re: PCM Progress Report No 4: Brains
R G.Neale   7/23/2011 10:38:38 AM
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Resistion-You could be right, I guess it's up to someone to prove the point experimentally, arm waving solutions and claims of brain functions or any other aspect of PCM developments are no longer acceptable. The 100 level resolution (1%)for Flash might result in some drift. In a modern scaled Flash how many electrons does that involve for each step? It is even possible if all devices in an emulated synapse network drift together the relative learned experience of the neural network is the same, others will have to answer that question. Drift tolerance is the feature that IBM use in their MLC-PCM. Both IBM-MLC and PCM-Onyx were originally part of this Progress Report I understand that material will now appear in the next PCM Progress Report, #5 in the near future.

JanineLove
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re: PCM Progress Report No 4: Brains
JanineLove   7/23/2011 8:44:17 PM
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I have hidden some of the comments on this article because of their unproductive nature. My thanks to those readers who pointed them out. I understand and am glad that we are passionate about our work, but let's keep it professional. Thanks.

resistion
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re: PCM Progress Report No 4: Brains
resistion   7/24/2011 4:02:10 AM
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The drift can be compensated with a reference, but each new data input needs a new reference, so things (costs, power, delays) add up that way. 100 levels in flash I think is not doable, even 8 levels or 3 bits is borderline. Too few random electrons to tell the difference.

rbtbob
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re: PCM Progress Report No 4: Brains
rbtbob   7/25/2011 4:44:11 AM
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Some of the readers that are not current on the research being done on phase change materials and devices in the last few years might like to read some of the papers presented at the European Phase Change and Ovonics Science Symposium. Regarding the subject of Mr. Neale's analysis, I recommend the paper presented by Stan Ovshinsky at the 2004 Symposium. http://www.epcos.org/library/library2010.htm

R G.Neale
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re: PCM Progress Report No 4: Brains
R G.Neale   7/25/2011 9:23:51 AM
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rbtbob-I was careful to put the precedence claim in quotes in case I had missed a paper. My brief was to explore what the Stanford team had been able to get the PCM to do based on their real experimental data, not to research the whole field of bio-science for claims and counter claims. The word "promising" in the title of the paper you recommend gives cause for concern. I think to date the whole field of phase change memory has been beset and damaged by too many unfulfilled promises.

Volatile Memory
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re: PCM Progress Report No 4: Brains
Volatile Memory   7/25/2011 2:58:32 PM
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Dear RF/Memory Editor: Yes, let's keep it professional! When pseudo-research is touted as some kind of breakthrough in a respected publication, the duty of the editor is to notice, not to silence the whistleblower. The fact is, Mr. Neale dropped the ball on this one. He knew or should have known that Mr. Ovshinsky has claimed similar "results" for at least 25 years. Those claims and results turned out to be fraudulent. As will the latest "results" from the "researchers" at Stanford University.

Volatile Memory
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re: PCM Progress Report No 4: Brains
Volatile Memory   7/25/2011 3:10:14 PM
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Here is the 10x Microsofts quote, accompanied with the "results:" http://goo.gl/WCxQm The document was created in December of 2004 (and published in early 2005) when Mr. Ovshinsky was still at the helm of Ovonic Cognitive Computer and its parent.

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