<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>From yesterday's issue of Science: <a href="https://science.sciencemag.org/content/372/6540/eabc6868">https://science.sciencemag.org/content/372/6540/eabc6868</a>, <span style="color:rgb(51,51,51);font-family:"Roboto Condensed","Helvetica Neue",Helvetica,Arial,sans-serif">Fluctuations shape plants through proprioception</span></div><div><span style="color:rgb(51,51,51);font-family:"Roboto Condensed","Helvetica Neue",Helvetica,Arial,sans-serif"><br></span></div><div><span style="color:rgb(51,51,51);font-family:Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:16px;background-color:rgb(230,230,230)">Plants constantly experience fluctuating internal and external mechanical cues, ranging from nanoscale deformation of wall components, cell growth variability, nutating stems, and fluttering leaves to stem flexion under tree weight and wind drag. Developing plants use such fluctuations to monitor and channel their own shape and growth through a form of proprioception. Fluctuations in mechanical cues may also be actively enhanced, producing oscillating behaviors in tissues. For example, proprioception through leaf nastic movements may promote organ flattening. We propose that fluctuation-enhanced proprioception allows plant organs to sense their own shapes and behave like active materials with adaptable outputs to face variable environments, whether internal or external. Because certain shapes are more amenable to fluctuations, proprioception may also help plant shapes to reach self-organized criticality to support such adaptability.</span><span style="color:rgb(51,51,51);font-family:"Roboto Condensed","Helvetica Neue",Helvetica,Arial,sans-serif"><br></span></div><div><br></div><div>This review is against the view that plant morphology is simply a deterministic developmental program with environmental noise imposed on it.</div><div><br></div><div>-- rec --</div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Apr 23, 2021 at 2:29 PM Steve Smith <<a href="mailto:sasmyth@swcp.com">sasmyth@swcp.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>programming/problem domain aside, what a "blast from the past"
with (mostly?) deprecated toolkits/chains/standards:</p>
<blockquote>
<p><i>SunOS vs Solaris, VGA output, TCL, PERL, C vs C++, and OMG
Forth!</i></p>
</blockquote>
<p>Steampunk or maybe Dieselpunk era hardware/software! A
Clackers' delight!<br>
</p>
<div>On 4/23/21 11:44 AM, Marcus Daniels
wrote:<br>
</div>
<blockquote type="cite">
<pre>Possibly of interest
<a href="https://qiskit.org/events/physics-of-computation/" target="_blank">https://qiskit.org/events/physics-of-computation/</a>
There was one of these at SFI for a while, if memory serves. I never used it.
<a href="http://www.ai.mit.edu/projects/im/cam8/" target="_blank">http://www.ai.mit.edu/projects/im/cam8/</a>
<a href="https://people.csail.mit.edu/nhm/cam8.pdf" target="_blank">https://people.csail.mit.edu/nhm/cam8.pdf</a>
-----Original Message-----
From: Friam <a href="mailto:friam-bounces@redfish.com" target="_blank"><friam-bounces@redfish.com></a> On Behalf Of Steve Smith
Sent: Friday, April 23, 2021 8:26 AM
To: <a href="mailto:friam@redfish.com" target="_blank">friam@redfish.com</a>
Subject: Re: [FRIAM] thermodynamics of gambling demons
On 4/23/21 7:20 AM, Roger Critchlow wrote:
</pre>
<blockquote type="cite">
<pre><a href="https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.080603" target="_blank">https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.080603</a>
<a href="https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.080603" target="_blank"><https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.080603></a>
If the demon "decides" to quit while it's ahead, it "wins", and the
entropy of the universe decreases.
-- rec --
via
<a href="https://www.quantamagazine.org/how-maxwells-demon-continues-to-startle" target="_blank">https://www.quantamagazine.org/how-maxwells-demon-continues-to-startle</a>
-scientists-20210422/
<a href="https://www.quantamagazine.org/how-maxwells-demon-continues-to-startle-scientists-20210422/" target="_blank"><https://www.quantamagazine.org/how-maxwells-demon-continues-to-startl
e-scientists-20210422/></a>
</pre>
</blockquote>
<pre>I was totally captivated by the Reversible Computing work presented by Margolus, Fredkin, Toffoli in the 1983 Cellular Automata conference at Los Alamos. I was brand new and easily impressed by some measures but the breadth of work presented during that week was amazing. Even though I stayed "in" the orbit of all that work on through the first decade of the ALife movement, I always felt I was pursuing a mirage "just over the horizon". My day job never aligned with this work so the available time/horsepower I had to pursue it was limited.
I am not surprised to see that Quantum Computing/Information has added it's own twist, I'd be curious if Marcus (or anyone else) has some first-hand perspective) on this.
<a href="https://arxiv.org/abs/quant-ph/9503016" target="_blank">https://arxiv.org/abs/quant-ph/9503016</a>
<a href="http://people.csail.mit.edu/nhm/thesis.pdf" target="_blank">http://people.csail.mit.edu/nhm/thesis.pdf</a>
<a href="https://en.wikipedia.org/wiki/Billiard-ball_computer" target="_blank">https://en.wikipedia.org/wiki/Billiard-ball_computer</a>
<a href="https://en.wikipedia.org/wiki/Digital_philosophy" target="_blank">https://en.wikipedia.org/wiki/Digital_philosophy</a>
<a href="https://en.wikipedia.org/wiki/Digital_physics#Pancomputationalism" target="_blank">https://en.wikipedia.org/wiki/Digital_physics#Pancomputationalism</a>
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