How Long Have You Been on TBBS?

[Jadzia]

Hey, that's neat! That reminds me of this CA Demonstration on fluid flows, combined with CAs on a more general network topology (like I've been investigating).

One could in fact think of the general mechanism of fluid flows taking place on a more complicated topology than just a regular lattice...I mean, you have currents, places where things eddy, boundaries, obstacles --- if you want I can get you a PDF of my paper. Just PM SPOCKED (I don't have PM abilities yet). I do something you might find really interesting in the last few pages, having to do with visualizing forest fires over a more general topology rather than just a square lattice.

Yes I'd to see that thanks. I'll send spocked my email address.


What made me think of this fluids problem was a documentary I watched about ants! The presenter was talking about his theories of nest design saying how the colony must regulate the flow of air through the nest, because the fungal gardens they grow underground produce a lot of heat and carbon dioxide that must be displaced by fresh air efficiently.

When you have a big nest with lots of small channels and not very many holes to the surface, there could very easily be stagnant areas where the carbon dioxide builds up to harmful levels. He proposed that an ants nest presents a subtle but complex air conditioning problem, and that the ants must address this problem in their nest construction.

 

[trekkiedane]

DANG!, this thread reads like a reunion taking place... I feel like throwing some jello in all sorts of directions

 

[Dukat's Major]

I'm sorry Trust me, I'm much better for the break...I really needed some time to figure some things out.

Glad you're all vacationed and figured. Sounds like a winning combination.

I guess that's how large messageboards tend to evolve --- in and out of tumultuous periods.

Thank goodness for that! Or we'd all have left, with the last one of us turning out the lights.

As to the trolls on your blog... those poor bastards - they messed with the wrong marine.

Yeah, I didn't just rip 'em one hole, I ripped about twenty....

 

[Dukat's Major]

Hey, that's neat! That reminds me of this CA Demonstration on fluid flows, combined with CAs on a more general network topology (like I've been investigating).

One could in fact think of the general mechanism of fluid flows taking place on a more complicated topology than just a regular lattice...I mean, you have currents, places where things eddy, boundaries, obstacles --- if you want I can get you a PDF of my paper. Just PM SPOCKED (I don't have PM abilities yet). I do something you might find really interesting in the last few pages, having to do with visualizing forest fires over a more general topology rather than just a square lattice.

Yes I'd to see that thanks. I'll send spocked my email address.


What made me think of this fluids problem was a documentary I watched about ants! The presenter was talking about his theories of nest design saying how the colony must regulate the flow of air through the nest, because the fungal gardens they grow underground produce a lot of heat and carbon dioxide that must be displaced by fresh air efficiently.

When you have a big nest with lots of small channels and not very many holes to the surface, there could very easily be stagnant areas where the carbon dioxide builds up to harmful levels. He proposed that an ants nest presents a subtle but complex air conditioning problem, and that the ants must address this problem in their nest construction.

Oh man, that's fascinating! That's just the kind of thing my group would love to model. It's both interesting when considering fluid flow and considering emergence of structure built by many tiny agents...really, really cool.

 

[Zulu Romeo]

I feel like throwing some jello in all sorts of directions

So do I, and I don't need a reunion to do so.

 

[Robert Maxwell]

Hey, that's neat! That reminds me of this CA Demonstration on fluid flows, combined with CAs on a more general network topology (like I've been investigating).

One could in fact think of the general mechanism of fluid flows taking place on a more complicated topology than just a regular lattice...I mean, you have currents, places where things eddy, boundaries, obstacles --- if you want I can get you a PDF of my paper. Just PM SPOCKED (I don't have PM abilities yet). I do something you might find really interesting in the last few pages, having to do with visualizing forest fires over a more general topology rather than just a square lattice.

Yes I'd to see that thanks. I'll send spocked my email address.


What made me think of this fluids problem was a documentary I watched about ants! The presenter was talking about his theories of nest design saying how the colony must regulate the flow of air through the nest, because the fungal gardens they grow underground produce a lot of heat and carbon dioxide that must be displaced by fresh air efficiently.

When you have a big nest with lots of small channels and not very many holes to the surface, there could very easily be stagnant areas where the carbon dioxide builds up to harmful levels. He proposed that an ants nest presents a subtle but complex air conditioning problem, and that the ants must address this problem in their nest construction.

Oh man, that's fascinating! That's just the kind of thing my group would love to model. It's both interesting when considering fluid flow and considering emergence of structure built by many tiny agents...really, really cool.

You guys should start a fluid dynamics thread in SciTech! I'm very interested in simulation, especially cellular automata. I admit I know virtually squat about fluid dynamics, though.

 

[Dukat's Major]

I feel like throwing some jello in all sorts of directions

So do I, and I don't need a reunion to do so.

Ooo, let me stand in random places with my mouth open.

Okay.....THROW!

 

[trekkiedane]

I feel like throwing some jello in all sorts of directions

So do I, and I don't need a reunion to do so.

Ooo, let me stand in random places with my mouth open.

Okay.....THROW!

Watch out for the low flying pancakes

 

[Zulu Romeo]

It must truly be Friday night.

 

[Finn]

Nice to see some familiar faces who haven't been around for a while. I'm probably due for a disappearence. But I didn't disappear in the past year despite a heavy course load the whole academic year (Physics ). I have Teaching Practicum and Biochemistry, then finally Student Teaching this coming academic year and the wedding planning (53 weeks to go! ). But I'm not even sure all of that will be enough to keep me away from this place.

 

[blablover5]

DANG!, this thread reads like a reunion taking place... I feel like throwing some jello in all sorts of directions

Good thing I just invented this Jell-O Cannon!

 

[SPOCKED]

DANG!, this thread reads like a reunion taking place... I feel like throwing some jello in all sorts of directions

Good thing I just invented this Jell-O Cannon!

erm, it's spelt "jello canon"

 

[blablover5]

DANG!, this thread reads like a reunion taking place... I feel like throwing some jello in all sorts of directions

Good thing I just invented this Jell-O Cannon!

erm, it's spelt "jello canon"

Just for that. Load 'em up!

 

[SPOCKED]

^

 

[Robert Maxwell]

DANG!, this thread reads like a reunion taking place... I feel like throwing some jello in all sorts of directions

Good thing I just invented this Jell-O Cannon!

erm, it's spelt "jello canon"

The brand name is spelled "Jell-O." Or you were making a joke and I didn't get it.

 

[trekkiedane]

Oh no! -not again!

 

[Mr. Laser Beam]

I joined in 2002. I was Mr. Laser Beam for awhile, then changed to Babaganoosh, now I have my old name back (did that because people kept confusing me with TEH BABA ).

 

[Jadzia]

Oh man, that's fascinating! That's just the kind of thing my group would love to model. It's both interesting when considering fluid flow and considering emergence of structure built by many tiny agents...really, really cool.

Thanks for sending me your paper. I have read through it.

The first thing I noticed is that the automata you're setting up have a lot of overlap with ANNs imo.

But there are two main differences:
- In your CA network, every arc is bidirectional, and every node has a loop. This makes the network compatible with CA rules. ANNs generally don't use bidirectional edges, although this (and feedback) are not explicitly forbidden.

- In your CA network, the new state of a node is a function of the sum of the states of the nodes in its adjacency list. In ANN's, the same is true, although there is the addition of arc weights that make some arcs more important contributors to that sum than others.


Where you go on to talk about forest fires I remembered an automata program I made a few years ago... I wanted to model the burning of a christmas pudding, and I decided that a network flow/automata type approach was the way to do it. I had slow evaporation of alcohol turning each non-flammable node into a flammable one. Burning nodes become non-flammable as the alcohol vapour rapidly burns away. Burning nodes of course turn all adjacent flammable nodes into burning nodes.

Then set one node as burning, and watch the fire spread. It will sweep across the pudding, then then as the alcohol vapour gets used up the system develops complex dynamics with lots of little flaming "fronts" that sweep and twist around much like they do on a real pudding. I'll see if I can find it tomorrow to show you

 

[PlainSimpleJoel]

So do I, and I don't need a reunion to do so.

Ooo, let me stand in random places with my mouth open.

Okay.....THROW!

Watch out for the low flying pancakes

Hmmm ... pancakes. Tempted to make some later.

Welcome back to Dukat's Major and blab.

 

[blablover5]

Good thing I just invented this Jell-O Cannon!

erm, it's spelt "jello canon"

The brand name is spelled "Jell-O." Or you were making a joke and I didn't get it.

None of Spocked's jokes ever make sense. He's like a humor savant in that only idiot savants get them.