100 billion neurons

classic Classic list List threaded Threaded
15 messages Options
Reply | Threaded
Open this post in threaded view
|

100 billion neurons

Jochen Fromm-3

A typical human brain has about 100 billion (10^11=100.000.000.000) neurons,

but each neuron follows only very simple integrate-and-fire rules. If we
distribute a comparatively simple program on 1.000.000 machines (which is
only a small fraction of the Internet, Google alone has between 50.000 and
100.000 machines, and SETI at home has over five million volunteers), and each
is responsible for the simulation of 100.000 neurons, then we come close
to the capacity of the human brain. How long will it take until we can
build such a system and connect it successfully to the real world
(through a robot) or a realistic virtual world (through an agent) ?
I guess it won't be long. As Greg Egan describes in his novel
"Permutation City", at first the simulation may be much slower than
reality, but enough computers are already there. What do you think ?

-J.





Reply | Threaded
Open this post in threaded view
|

100 billion neurons

doug carmichael
"A typical human brain has about 100 billion (10^11=100.000.000.000)
neurons,

but each neuron follows only very simple integrate-and-fire rules.'

Comment: this implies a discrete ensemble of discrete events. But isn't each
neuron's likelihood of firing dependent on the solution in which it sits,
the gradients of ions, and proximities to tier multiple firing neurons?

In which case the brain is an infinite ensemble of an infinity of analog
events.

doug





============================================================
FRIAM Applied Complexity Group listserv
Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives,
unsubscribe, maps at http://www.friam.org



Reply | Threaded
Open this post in threaded view
|

100 billion neurons

Jochen Fromm-3

Interesting remark, but I don't think it really works this way.
It is not an infinite ensemble of an infinite number of analog events.
A neuron fires or not - a boolean event - and spikes are certainly
discrete events. The ion channels, the gradients of ions, and all
the chemical substances are only the "hardware" of the brain. One
could compare it to transistors, wires, etc. If the genes could
produce transistors instead of proteins, they would perhaps use
digital circuits. However, the interesting part seems to be the
software, esp. the code which is used (if there is any). There
are of course at least four different levels of modelling,
from boolean networks and sigmoid networks to spiking networks,
see Fig. 3 in http://www.vs.uni-kassel.de/~fromm/Articles/LI.pdf

-J.
 

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf
Of doug
Sent: Sunday, July 09, 2006 2:24 AM
To: 'The Friday Morning Applied Complexity Coffee Group'
Subject: Re: [FRIAM] 100 billion neurons

Comment: this implies a discrete ensemble of discrete events. But isn't each
neuron's likelihood of firing dependent on the solution in which it sits,
the gradients of ions, and proximities to tier multiple firing neurons?

In which case the brain is an infinite ensemble of an infinity of analog
events.

doug





Reply | Threaded
Open this post in threaded view
|

100 billion neurons

Martin C. Martin-2
In reply to this post by Jochen Fromm-3
I suspect you'd like Hans Moravec's books:

http://www.amazon.com/gp/product/0674576187
http://www.amazon.com/gp/product/0195136306

He uses Moore's law and estimates of the brain's computing power to
calculate when we'll have human equivalence in "a computer."  I forget
the date, but it's not far.  He also talks about a number of very
interesting consequences of this.

- Martin


Reply | Threaded
Open this post in threaded view
|

100 billion neurons

Robert J. Cordingley
I recollect that some years ago the AI community (at a AAAI conference I
attended) claimed that each of the 10^11 neurons also had on average
10^4 connections resulting in a 10^15 computational 'size' for the
brain.  They also predicted we'd have a computer of similar power by
2015.  Furrthermore it also stuck in my mind that 40% of the brain was
claimed to be involved in vision (including reading).  So  these
estimates lead one to think that it's going to be quite close to 2015
before we have a system with just the power of human vision.  Being able
to program such a machine was not part of the discussion at the time,
which is a big question to me.

Thanks
Robert Cordingley
www.cirrillian.com

Martin C. Martin wrote:

>I suspect you'd like Hans Moravec's books:
>
>http://www.amazon.com/gp/product/0674576187
>http://www.amazon.com/gp/product/0195136306
>
>He uses Moore's law and estimates of the brain's computing power to
>calculate when we'll have human equivalence in "a computer."  I forget
>the date, but it's not far.  He also talks about a number of very
>interesting consequences of this.
>
>- Martin
>
>============================================================
>FRIAM Applied Complexity Group listserv
>Meets Fridays 9a-11:30 at cafe at St. John's College
>lectures, archives, unsubscribe, maps at http://www.friam.org
>
>
>  
>


Reply | Threaded
Open this post in threaded view
|

100 billion neurons

Steve Smith
In reply to this post by Martin C. Martin-2

On Jul 8, 2006, at 7:15 PM, Martin C. Martin wrote:

> I suspect you'd like Hans Moravec's books:
>
> http://www.amazon.com/gp/product/0674576187
> http://www.amazon.com/gp/product/0195136306
>

I was in Ames, IA at their VR symposium in April and Ray Kurzweil was
the capstone speaker and was promoting his recent book, The Singularity
is Near...  I don't agree with most of what he concludes but I do
believe most of his facts are right on...  I scored a signed copy...
read about 2/3 of it before I got tired of thinking about how everyone
probably wants to live forever...  at least Kurzweil does, even
(especially) if as a disembodied digital version...



- Steve



Reply | Threaded
Open this post in threaded view
|

100 billion neurons

Frank Wimberly
In reply to this post by Martin C. Martin-2
Back in the 1980's Hans and I had offices next to each other in the
Robotics Institute at Carnegie Mellon.  Over a period of a couple of
years we had numerous arguments about whether machines could realize
consciousness; whether a human mind could be transferred to a machine,
etc.  I remember saying that if somehow my "mind" were transferred from
my body to some robot--which I felt was impossible--it might be that
everyone else would agree that it was a remarkable likeness but that I
would be gone.  Hans replied that I undervalued myself--that I am
software not hardware.  After many arguments along these lines I said,
"Hans, I now understand why you don't understand what I am saying about
consciousness--you don't have it."  This was all in good humor and later
when I was teaching a course in AI to MBA students I invited Hans to
continue our debate in class.  A good time was had by all, I hope.

Frank

---
Frank C. Wimberly
140 Calle Ojo Feliz              (505) 995-8715 or (505) 670-9918 (cell)
Santa Fe, NM 87505           wimberly3 at earthlink.net

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On
Behalf Of Martin C. Martin
Sent: Saturday, July 08, 2006 7:16 PM
To: The Friday Morning Applied Complexity Coffee Group
Subject: Re: [FRIAM] 100 billion neurons

I suspect you'd like Hans Moravec's books:

http://www.amazon.com/gp/product/0674576187
http://www.amazon.com/gp/product/0195136306

He uses Moore's law and estimates of the brain's computing power to
calculate when we'll have human equivalence in "a computer."  I forget
the date, but it's not far.  He also talks about a number of very
interesting consequences of this.

- Martin

============================================================
FRIAM Applied Complexity Group listserv
Meets Fridays 9a-11:30 at cafe at St. John's College
lectures, archives, unsubscribe, maps at http://www.friam.org



Reply | Threaded
Open this post in threaded view
|

100 billion neurons

Douglas Roberts-2
I hesitate to point this out... Wait a minute, that 's not correct.  I
*rush* to point this out:  The conversation has become a bit neurotic by
now, wouldn't you all agree?

--Doug (Still on vacation, somewhere in Utah's canyon country today).


On 7/10/06, Frank Wimberly <wimberly3 at earthlink.net> wrote:

>
> Back in the 1980's Hans and I had offices next to each other in the
> Robotics Institute at Carnegie Mellon.  Over a period of a couple of
> years we had numerous arguments about whether machines could realize
> consciousness; whether a human mind could be transferred to a machine,
> etc.  I remember saying that if somehow my "mind" were transferred from
> my body to some robot--which I felt was impossible--it might be that
> everyone else would agree that it was a remarkable likeness but that I
> would be gone.  Hans replied that I undervalued myself--that I am
> software not hardware.  After many arguments along these lines I said,
> "Hans, I now understand why you don't understand what I am saying about
> consciousness--you don't have it."  This was all in good humor and later
> when I was teaching a course in AI to MBA students I invited Hans to
> continue our debate in class.  A good time was had by all, I hope.
>
> Frank
>
> ---
> Frank C. Wimberly
> 140 Calle Ojo Feliz              (505) 995-8715 or (505) 670-9918 (cell)
> Santa Fe, NM 87505           wimberly3 at earthlink.net
>
> -----Original Message-----
> From: friam-bounces at redfish.com [mailto:friam-bounces at redfish.com] On
> Behalf Of Martin C. Martin
> Sent: Saturday, July 08, 2006 7:16 PM
> To: The Friday Morning Applied Complexity Coffee Group
> Subject: Re: [FRIAM] 100 billion neurons
>
> I suspect you'd like Hans Moravec's books:
>
> http://www.amazon.com/gp/product/0674576187
> http://www.amazon.com/gp/product/0195136306
>
> He uses Moore's law and estimates of the brain's computing power to
> calculate when we'll have human equivalence in "a computer."  I forget
> the date, but it's not far.  He also talks about a number of very
> interesting consequences of this.
>
> - Martin
>
> ============================================================
> FRIAM Applied Complexity Group listserv
> Meets Fridays 9a-11:30 at cafe at St. John's College
> lectures, archives, unsubscribe, maps at http://www.friam.org
>
>
> ============================================================
> FRIAM Applied Complexity Group listserv
> Meets Fridays 9a-11:30 at cafe at St. John's College
> lectures, archives, unsubscribe, maps at http://www.friam.org
>



--
Doug Roberts, RTI International
droberts at rti.org
doug at parrot-farm.net
505-455-7333 - Office
505-670-8195 - Cell
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/friam_redfish.com/attachments/20060710/c94aa8e3/attachment.html

Reply | Threaded
Open this post in threaded view
|

100 billion neurons

Steve Smith

On Jul 10, 2006, at 4:13 PM, Douglas Roberts wrote:

> I hesitate to point this out... Wait a minute, that 's not correct.? I
> *rush* to point this out:? The conversation has become a bit neurotic
> by now, wouldn't you all agree?
> ?
> --Doug (Still on vacation, somewhere in Utah's canyon country today).
Wait, wait, the canyon country *I* know of in Utah doesn't have *any*
wireless access.   Doug's AI back in NM is speaking on his behalf!  
Let's add Paranoid (me) to Neurotic while we are at it.

>
> ?
> On 7/10/06, Frank Wimberly <wimberly3 at earthlink.net> wrote: Back in
> the 1980's Hans and I had offices next to each other in the
>> Robotics Institute at Carnegie Mellon.??Over a period of a couple of
>> years we had numerous arguments about whether machines could realize
>> consciousness; whether a human mind could be transferred to a machine,
>> etc.??I remember saying that if somehow my "mind" were transferred
>> from
>> my body to some robot--which I felt was impossible--it might be that
>> everyone else would agree that it was a remarkable likeness but that I
>> would be gone.??Hans replied that I undervalued myself--that I am
>> software not hardware.??After many arguments along these lines I said,
>> "Hans, I now understand why you don't understand what I am saying
>> about
>> consciousness--you don't have it."??This was all in good humor and
>> later
>> when I was teaching a course in AI to MBA students I invited Hans to
>> continue our debate in class.??A good time was had by all, I hope.
>>
>> Frank
>>
>> ---
>> Frank C. Wimberly
>> 140 Calle Ojo Feliz??????????????(505) 995-8715 or (505) 670-9918
>> (cell)
>> Santa Fe, NM 87505?????????? wimberly3 at earthlink.net
>>
>> -----Original Message-----
>> From: friam-bounces at redfish.com [mailto: friam-bounces at redfish.com] On
>> Behalf Of Martin C. Martin
>> Sent: Saturday, July 08, 2006 7:16 PM
>> To: The Friday Morning Applied Complexity Coffee Group
>> Subject: Re: [FRIAM] 100 billion neurons
>>
>> I suspect you'd like Hans Moravec's books:
>>
>> http://www.amazon.com/gp/product/0674576187
>> http://www.amazon.com/gp/product/0195136306
>>
>>  He uses Moore's law and estimates of the brain's computing power to
>> calculate when we'll have human equivalence in "a computer."??I forget
>> the date, but it's not far.??He also talks about a number of very
>>  interesting consequences of this.
>>
>> - Martin
>>
>> ============================================================
>> FRIAM Applied Complexity Group listserv
>> Meets Fridays 9a-11:30 at cafe at St. John's College
>> lectures, archives, unsubscribe, maps at http://www.friam.org
>>
>>
>> ============================================================
>> FRIAM Applied Complexity Group listserv
>> Meets Fridays 9a-11:30 at cafe at St. John's College
>> lectures, archives, unsubscribe, maps at http://www.friam.org
>
>
>
> --
> Doug Roberts, RTI International
>  droberts at rti.org
> doug at parrot-farm.net
> 505-455-7333 - Office
> 505-670-8195 -
> Cell============================================================
> FRIAM Applied Complexity Group listserv
> Meets Fridays 9a-11:30 at cafe at St. John's College
> lectures, archives, unsubscribe, maps at http://www.friam.org
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: text/enriched
Size: 3608 bytes
Desc: not available
Url : /pipermail/friam_redfish.com/attachments/20060713/99c1d33e/attachment.bin

Reply | Threaded
Open this post in threaded view
|

100 billion neurons

Giles Bowkett
In reply to this post by Frank Wimberly
I'm inclined to agree. The model I use is nonlinear fluid dynamics.
Say you've got a thought which you began thinking when you were young.
That thought is a fluid in motion. Over the course of your life you
revisit certain ideas and revise certain opinions. The motion
continues for decades. The way you think is like an information
processing system which evolves over the course of your life, and it's
true enough to call that software, not hardware, but the flow of data
through that system is entirely organic, and creating an exact copy of
a given flow in nonlinear fluid dynamics is impossible. The structure
of your mode of thinking -- your "software" -- is shaped tremendously
by the things that you think about; therefore replicating the
processor without replicating the data can only be of partial
usefulness, if the processor is shaped by and for the data. It's like
copying a river by duplicating exactly every last rock and pebble, but
leaving out the water.

On 7/10/06, Frank Wimberly <wimberly3 at earthlink.net> wrote:

> Back in the 1980's Hans and I had offices next to each other in the
> Robotics Institute at Carnegie Mellon.  Over a period of a couple of
> years we had numerous arguments about whether machines could realize
> consciousness; whether a human mind could be transferred to a machine,
> etc.  I remember saying that if somehow my "mind" were transferred from
> my body to some robot--which I felt was impossible--it might be that
> everyone else would agree that it was a remarkable likeness but that I
> would be gone.  Hans replied that I undervalued myself--that I am
> software not hardware.  After many arguments along these lines I said,
> "Hans, I now understand why you don't understand what I am saying about
> consciousness--you don't have it."  This was all in good humor and later
> when I was teaching a course in AI to MBA students I invited Hans to
> continue our debate in class.  A good time was had by all, I hope.
>
> Frank
>
> ---
> Frank C. Wimberly
> 140 Calle Ojo Feliz              (505) 995-8715 or (505) 670-9918 (cell)
> Santa Fe, NM 87505           wimberly3 at earthlink.net
>
> -----Original Message-----
> From: friam-bounces at redfish.com [mailto:friam-bounces at redfish.com] On
> Behalf Of Martin C. Martin
> Sent: Saturday, July 08, 2006 7:16 PM
> To: The Friday Morning Applied Complexity Coffee Group
> Subject: Re: [FRIAM] 100 billion neurons
>
> I suspect you'd like Hans Moravec's books:
>
> http://www.amazon.com/gp/product/0674576187
> http://www.amazon.com/gp/product/0195136306
>
> He uses Moore's law and estimates of the brain's computing power to
> calculate when we'll have human equivalence in "a computer."  I forget
> the date, but it's not far.  He also talks about a number of very
> interesting consequences of this.
>
> - Martin
>
> ============================================================
> FRIAM Applied Complexity Group listserv
> Meets Fridays 9a-11:30 at cafe at St. John's College
> lectures, archives, unsubscribe, maps at http://www.friam.org
>
>
> ============================================================
> FRIAM Applied Complexity Group listserv
> Meets Fridays 9a-11:30 at cafe at St. John's College
> lectures, archives, unsubscribe, maps at http://www.friam.org
>


--
Giles Bowkett
http://www.gilesgoatboy.org


Reply | Threaded
Open this post in threaded view
|

100 billion neurons

George Duncan
Shall this conversation be neuronic rather than neurotic?

Or try this
http://www.technologyreview.com/read_article.aspx?id=17164&ch=infotech


On 7/13/06, Giles Bowkett <gilesb at gmail.com> wrote:

>
> I'm inclined to agree. The model I use is nonlinear fluid dynamics.
> Say you've got a thought which you began thinking when you were young.
> That thought is a fluid in motion. Over the course of your life you
> revisit certain ideas and revise certain opinions. The motion
> continues for decades. The way you think is like an information
> processing system which evolves over the course of your life, and it's
> true enough to call that software, not hardware, but the flow of data
> through that system is entirely organic, and creating an exact copy of
> a given flow in nonlinear fluid dynamics is impossible. The structure
> of your mode of thinking -- your "software" -- is shaped tremendously
> by the things that you think about; therefore replicating the
> processor without replicating the data can only be of partial
> usefulness, if the processor is shaped by and for the data. It's like
> copying a river by duplicating exactly every last rock and pebble, but
> leaving out the water.
>
> On 7/10/06, Frank Wimberly <wimberly3 at earthlink.net> wrote:
> > Back in the 1980's Hans and I had offices next to each other in the
> > Robotics Institute at Carnegie Mellon.  Over a period of a couple of
> > years we had numerous arguments about whether machines could realize
> > consciousness; whether a human mind could be transferred to a machine,
> > etc.  I remember saying that if somehow my "mind" were transferred from
> > my body to some robot--which I felt was impossible--it might be that
> > everyone else would agree that it was a remarkable likeness but that I
> > would be gone.  Hans replied that I undervalued myself--that I am
> > software not hardware.  After many arguments along these lines I said,
> > "Hans, I now understand why you don't understand what I am saying about
> > consciousness--you don't have it."  This was all in good humor and later
> > when I was teaching a course in AI to MBA students I invited Hans to
> > continue our debate in class.  A good time was had by all, I hope.
> >
> > Frank
> >
> > ---
> > Frank C. Wimberly
> > 140 Calle Ojo Feliz              (505) 995-8715 or (505) 670-9918 (cell)
> > Santa Fe, NM 87505           wimberly3 at earthlink.net
> >
> > -----Original Message-----
> > From: friam-bounces at redfish.com [mailto:friam-bounces at redfish.com] On
> > Behalf Of Martin C. Martin
> > Sent: Saturday, July 08, 2006 7:16 PM
> > To: The Friday Morning Applied Complexity Coffee Group
> > Subject: Re: [FRIAM] 100 billion neurons
> >
> > I suspect you'd like Hans Moravec's books:
> >
> > http://www.amazon.com/gp/product/0674576187
> > http://www.amazon.com/gp/product/0195136306
> >
> > He uses Moore's law and estimates of the brain's computing power to
> > calculate when we'll have human equivalence in "a computer."  I forget
> > the date, but it's not far.  He also talks about a number of very
> > interesting consequences of this.
> >
> > - Martin
> >
> > ============================================================
> > FRIAM Applied Complexity Group listserv
> > Meets Fridays 9a-11:30 at cafe at St. John's College
> > lectures, archives, unsubscribe, maps at http://www.friam.org
> >
> >
> > ============================================================
> > FRIAM Applied Complexity Group listserv
> > Meets Fridays 9a-11:30 at cafe at St. John's College
> > lectures, archives, unsubscribe, maps at http://www.friam.org
> >
>
>
> --
> Giles Bowkett
> http://www.gilesgoatboy.org
>
> ============================================================
> FRIAM Applied Complexity Group listserv
> Meets Fridays 9a-11:30 at cafe at St. John's College
> lectures, archives, unsubscribe, maps at http://www.friam.org
>



--
George T. Duncan
Professor of Statistics
Heinz School of Public Policy and Management
Carnegie Mellon University
Pittsburgh, PA 15213
(412) 268-2172
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/friam_redfish.com/attachments/20060713/bcb8105c/attachment.html

Reply | Threaded
Open this post in threaded view
|

100 billion neurons

Jim Rutt
In reply to this post by Frank Wimberly
as an interesting argument that the old hardware/software argument about
consciousness is often malformed, take a look see at:



Damasio, Antonio: _The Feeling of What Happens: Body and Emotion in the
Making of
Consciousness_




At 07:30 AM 7/10/2006, you wrote:

>Back in the 1980's Hans and I had offices next to each other in the
>Robotics Institute at Carnegie Mellon.  Over a period of a couple of
>years we had numerous arguments about whether machines could realize
>consciousness; whether a human mind could be transferred to a machine,
>etc.  I remember saying that if somehow my "mind" were transferred from
>my body to some robot--which I felt was impossible--it might be that
>everyone else would agree that it was a remarkable likeness but that I
>would be gone.  Hans replied that I undervalued myself--that I am
>software not hardware.  After many arguments along these lines I said,
>"Hans, I now understand why you don't understand what I am saying about
>consciousness--you don't have it."  This was all in good humor and later
>when I was teaching a course in AI to MBA students I invited Hans to
>continue our debate in class.  A good time was had by all, I hope.
>
>Frank
>
>---
>Frank C. Wimberly
>140 Calle Ojo Feliz              (505) 995-8715 or (505) 670-9918 (cell)
>Santa Fe, NM 87505           wimberly3 at earthlink.net
>
>-----Original Message-----
>From: friam-bounces at redfish.com [mailto:friam-bounces at redfish.com] On
>Behalf Of Martin C. Martin
>Sent: Saturday, July 08, 2006 7:16 PM
>To: The Friday Morning Applied Complexity Coffee Group
>Subject: Re: [FRIAM] 100 billion neurons
>
>I suspect you'd like Hans Moravec's books:
>
>http://www.amazon.com/gp/product/0674576187
>http://www.amazon.com/gp/product/0195136306
>
>He uses Moore's law and estimates of the brain's computing power to
>calculate when we'll have human equivalence in "a computer."  I forget
>the date, but it's not far.  He also talks about a number of very
>interesting consequences of this.
>
>- Martin
>
>============================================================
>FRIAM Applied Complexity Group listserv
>Meets Fridays 9a-11:30 at cafe at St. John's College
>lectures, archives, unsubscribe, maps at http://www.friam.org
>
>
>============================================================
>FRIAM Applied Complexity Group listserv
>Meets Fridays 9a-11:30 at cafe at St. John's College
>lectures, archives, unsubscribe, maps at http://www.friam.org

===================================
Jim Rutt
voice:  505-989-1115

-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/friam_redfish.com/attachments/20060713/3f05e21d/attachment.html

Reply | Threaded
Open this post in threaded view
|

100 billion neurons

Frank Wimberly
At the risk of being neurotic, here is link to a review of Damasio's
book:

http://dir.salon.com/story/books/review/1999/09/21/damasio/index.html


Frank

---
Frank C. Wimberly
140 Calle Ojo Feliz??????????????(505) 995-8715 or (505) 670-9918 (cell)
Santa Fe, NM 87505???????????wimberly3 at earthlink.net
-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On
Behalf Of Jim Rutt
Sent: Thursday, July 13, 2006 4:58 PM
To: The Friday Morning Applied Complexity Coffee Group
Subject: Re: [FRIAM] 100 billion neurons

as an interesting argument that the old hardware/software argument about
consciousness is often malformed, take a look see at:



Damasio, Antonio: _The Feeling of What Happens: Body and Emotion in the
Making of
Consciousness_

?


At 07:30 AM 7/10/2006, you wrote:

Back in the 1980's Hans and I had offices next to each other in the
Robotics Institute at Carnegie Mellon.? Over a period of a couple of
years we had numerous arguments about whether machines could realize
consciousness; whether a human mind could be transferred to a machine,
etc.? I remember saying that if somehow my "mind" were transferred from
my body to some robot--which I felt was impossible--it might be that
everyone else would agree that it was a remarkable likeness but that I
would be gone.? Hans replied that I undervalued myself--that I am
software not hardware.? After many arguments along these lines I said,
"Hans, I now understand why you don't understand what I am saying about
consciousness--you don't have it."? This was all in good humor and later
when I was teaching a course in AI to MBA students I invited Hans to
continue our debate in class.? A good time was had by all, I hope.

Frank

---
Frank C. Wimberly
140 Calle Ojo Feliz????????????? (505) 995-8715 or (505) 670-9918 (cell)
Santa Fe, NM 87505?????????? wimberly3 at earthlink.net

-----Original Message-----
From: [hidden email] [ mailto:[hidden email]] On
Behalf Of Martin C. Martin
Sent: Saturday, July 08, 2006 7:16 PM
To: The Friday Morning Applied Complexity Coffee Group
Subject: Re: [FRIAM] 100 billion neurons

I suspect you'd like Hans Moravec's books:

http://www.amazon.com/gp/product/0674576187
http://www.amazon.com/gp/product/0195136306

He uses Moore's law and estimates of the brain's computing power to
calculate when we'll have human equivalence in "a computer."? I forget
the date, but it's not far.? He also talks about a number of very
interesting consequences of this.

- Martin

============================================================
FRIAM Applied Complexity Group listserv
Meets Fridays 9a-11:30 at cafe at St. John's College
lectures, archives, unsubscribe, maps at http://www.friam.org 


============================================================
FRIAM Applied Complexity Group listserv
Meets Fridays 9a-11:30 at cafe at St. John's College
lectures, archives, unsubscribe, maps at http://www.friam.org 
===================================
Jim Rutt
voice:? 505-989-1115??



Reply | Threaded
Open this post in threaded view
|

100 billion neurons

Carlos Gershenson
Hi all,

About modelling the brain.
OK, suppose you have enough CPU's to model a human brain. The  
question remains: how do you train that brain? I mean, it takes us a  
few years just to start speaking. Moreover, you need a body and an  
environment to develop cognition... even if this virtual brain would  
be controlling a real robot, you really need to have real time  
interaction to be able to deal with OUR environment... so I see this  
still VEEEEERY far...

Best regards,

     Carlos Gershenson...
     Centrum Leo Apostel, Vrije Universiteit Brussel
     Krijgskundestraat 33. B-1160 Brussels, Belgium
     http://homepages.vub.ac.be/~cgershen/

   ?Tendencies tend to change...?




Reply | Threaded
Open this post in threaded view
|

100 billion neurons

habib-2
Hi,
I am looking with doubt at some of assumptions made here:

'Neuron follows only very simple integrate-and-fire rules.'

The complexity theory tells us that small changes in agents behaviors can
shows itself by an global vast change. The dynamics in neuron is much more
complex. There are lots of details that maybe important. Integrate and fire
is a level of abstraction. Your abstraction model is completely dependent to
your aim.  If you want to model a real brain i think you should not use the
simplest level of abstraction.


'had on average 10^4 connections resulting in a 10^15 computational 'size'
for the brain.'
I think we does merely not confronted with a set of 10^4 numbers. There are
papers suggesting the spacial  structure of brain have some computational
significance. The connections also have their own dynamics. There are papers
emphasizing these dynamics rule in whole system output.

I think the problem of modeling the brain is not a matter of computational
power. It is a matter of lack of knowledge about the brain. We can not
simulate brain simply because we do not know how exactly it is working. we
can make assumptions about Brain and simulate our model and compare its
output with real model, but we can not model real brain, at least now.

Best regards,
Habib Talavaty.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/friam_redfish.com/attachments/20060717/83d5f1c9/attachment.html