Alt-BEAM Archive

Message #10157



To: "'beam@sgiblab.sgi.com'" beam@sgiblab.sgi.com
From: Wilf Rigter Wilf.Rigter@powertech.bc.ca
Date: Sun, 13 Feb 2000 10:14:19 -0800
Subject: [alt-beam] Re: Bicores don't have rollercoaster points, do they?


As in "one rollercoaster crashing into the next" maybe?
Pulses or wavefronts? It all depends on your perspective:

In a _saturated_ core or open ended array of 100 Nvs, the
earliest transition (wavefront), for example at the input of the
first Nv, will propagate through all Nv stages to the output
of the last Nv in about 3 microsecond (100x30ns). Now
that is what I call a wavefront! No wonder all outputs change
in lockstep. Under those particular conditions, the Nvs
with the longer time constants simply act as inverters not
as staggered pulse generators.

Anyway it's time I read Living Machines again, since it's most
likely that Mark has already "been there, done that"!

regards

wilf

> -----Original Message-----
> From: Dennison Bertram [SMTP:dibst11+@pitt.edu]
> Sent: Sunday, February 13, 2000 8:24 AM
> To: beam@sgiblab.sgi.com
> Subject: RE: Bicores don't have rollercoaster points, do they?
>
> I think the term is used in Living Machines, it refers to when a
> Micorocore
> is in a saturated state. In the saturated state the speed that the net
> propoages the pulse's is equal to the time constraints of the shortest
> neuron. That neuron is considered the rollercoaster point, as it's timing
> is
> shorter than all the neurons it forces all pulses to speed up.
>
> dennison
>
>
> I'm not familiar with the term "rollercoaster points" so I can't wait to
> hear someone explain this. However grounded or suspended bicores always
> operate in the saturated mode. The processes in both Nv are closely
> coupled
> and a wavefront (output transition) always travels around the (rather
> short)
> loop and is inhibited at the input of the initiating Nv.
> However the grounded bicore has truly independent Nv timeconstants but the
> suspended bicore does not. For example, try using .1uf for one Nv and
> .33uf
> for the second Nv. Resistors are all equal value of 2M or something. Now
> check the positive pulsewidths at each output. The grounded bicore outputs
> are different by a ratio of 1/3 so far so good! But the suspended bicore
> outputs are all over the place from 1/1 to 1/3 depending almost entirely
> on
> the ratio of the threshold voltage to the supply voltage. huh?
>
> regards
>
> wilf
>
> ----------
> From: Dennison Bertram
> To: beam@sgiblab.sgi.com
> Sent: 2/11/00 9:34:27 AM
> Subject: Bicores don't have rollercoaster points, do they?
>
>
> heres a quick question I thought of while, writting a paper about BEAM.
> Bicores don't have rollercoaster points like microcores, do they? Because
> there is only one process there isn't really any one neuron whom in the
> saturated state acts as the rollercoaster point. For a rollsecoaster point
> you need a saturated, multiproces loop. Am I right?
>
> dennison
>



10158 Sun, 13 Feb 2000 18:19:31 GMT [alt-beam] Re: Cool Idea, or so i think! beam@sgiblab.sgi.com "Mike Kulesza"

Kind off like biped walker?
______________________________________________________



10159 Sun, 13 Feb 2000 12:35:19 -0500 Beams and robotics net Robocom Technologies
Hi there,

This message will be, probably, interesting for the robotic fans around the
world and I hope this will help you, the only thing I need is your feedback.
So what I want to do, is to give you the tools to express yourself, to give
ideas to the others ...with everything you need on the net:

a dedicated server for the robotic world...

So for the ones who are interested in that project, they will receive an
unlimited space on this server, Emails, Ftp account, chat, forums... for
nothing !

I don't know if it's a good idea or not but I need your feedback on this and
I hope you will help me to create, design this project for the fans as you.

Best regards,

Olivier


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