sixfold

cross-posted from: https://lemmy.sdf.org/post/3732588

A nice trip up and down the scale of things. I especially like the ones from 10^1 to 10^14, inhumane numbers attempting to be brought to a human scale.

Source: CRC Standard Mathematical Tables and Formulas (Zwillinger, Daniel) (Z-Library)

cross-posted from: https://lemmy.sdf.org/post/3152363

Figs and fig wasps have a tightly coordinated reproductive cycle, and have been cospeciating for 70 to 90 million years. The pollination of figs is accomplished in an internal cavity only accessible to a specific species of wasp. The wasp enters through an opening that is only just large enough for it to get through, loosing it's wings and antenna in the process. Pollen on the wasp pollinate the fig's internal flowers, and the wasp lays it's eggs in some of the flowers before dying there. When the male wasps hatch, they fertilize the unhatched females, and burrow tunnels out of the fig before also dying inside it. When the females hatch, they exit the fig through the tunnels, taking pollen with them to search for a fig within which to lay their eggs.

https://en.wikipedia.org/wiki/Syconium https://en.wikipedia.org/wiki/Fig_wasp

This is a jar full of only water (liquid and vapor). It boils at any temperature when you apply something cold enough to the top, like ice.

cross-posted from: https://lemmy.sdf.org/post/2697716

I put water in a jar and sealed it while it was boiling, and now it boils at any temperature. Super fun demo to try.

Now a set of useful mutations are implemented, and balanced so that the number of nodes or edges doesn't explode.

The mutations I've implemented (node are genes are nodes):

add random gene
delete node
delete group of nodes (range of indexes)
split edge    create new node in place of an edge (insertNode)
flip edge
duplicate node
duplicated group of nodes (range of indexes)
change node index (regrouping/separating functional groups)
change group of nodes index (transposable elements)
create random edge
delete random existing edge
scale existing edge weight
negate weight
redirect existing edge to random node
scale parameter (k1, b, k2)
negate bias

This is the next installment from the Gene Regulatory Network saga.

previously: https://lemmy.sdf.org/post/1967056######

I'm working on a program to edit and simulate gene regulatory networks using recurrent neural networks as a model. Here's a demo.

cross-posted from: https://lemmy.sdf.org/post/1775532

A model of gene regulatory networks using the mathematical model for recurrent neural nets from computer science. It's such a great way to describe how a cell 'knows' things. every single celled organism or cell in a body contains within a complex information processing chemical network of gene-regulating proteins. One way to think of it is that every individual cell integrates information like a neural network. Good read, there are newer papers on this subject, but I'm not sure if there are better ones.

Based on Neural Model of the Genetic Network Vohradsky 2001 I'm working on a project to make reaction diffusion and evolutionary algorithms more interesting. I want to simulate development of artificial multicellular organisms.

https://en.wikipedia.org/wiki/Embrace,_extend,_and_extinguish

These seem pretty common, still don't know what they might be though. Showed up the same day as the last mushrooms I posted. It's fun to see so many different kinds.

Can you say what theses are?

I'm not really sure what they are (I've never ID'd a mushroom before) but they looked cool. We've had some extra rain this spring, and these guys sprouted out of nowhere.