Link sausage
Apr. 21st, 2009 10:17 am![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
magidDisconcerting confluence today: Yom haShoah and Ben & Jerry's free cone day.
A real time World Wide Lightning Location Network.
Scary: coral reefs may dissolve if CO2 levels get high enough. And coral bleaching is already an issue.
Via Lifecollage, a TED talk on hyperbolic crochet coral reef, which also includes discussion on the ecology of coral reefs.
From a math paper on hyperbolic surfaces, directions for crocheting hyperbolic planes.
Via Cellio, the 15 strangest buildings (number 13 made me laugh).
Or another option, living in a treehouse.
And then there's buildings made of food.
And drink: now you (well, only those with tickets, which I assume doesn't happen to include anyone reading this, but hey) can breathe your G and T.
A real time World Wide Lightning Location Network.
Scary: coral reefs may dissolve if CO2 levels get high enough. And coral bleaching is already an issue.
Via Lifecollage, a TED talk on hyperbolic crochet coral reef, which also includes discussion on the ecology of coral reefs.
From a math paper on hyperbolic surfaces, directions for crocheting hyperbolic planes.
- Make your beginning chain stitches. (Topologists may recognize that as the stitches in the Fox-Artin wild arc!) About 20 chain stitches for the beginning will be enough.
- For the first stitch in each row insert the hook into the 2nd chain from the hook. Take yarn over and pull through chain, leaving 2 loops on hook. Take yarn over and pull through both loops. One single crochet stitch has been completed.
- For the next N stitches proceed exactly like the first stitch except insert the hook into the next chain (instead of the 2nd).
- For the (N+1)st stitch proceed as before except insert the hook into the same loop as the Nth stitch.
- Repeat Steps 3 and 4 until you reach the end of the row.
- At the end of the row before going to the next row do one extra chain stitch.
- When you have the model as big as you want, you can stop by just pulling the yarn through the last loop.
Be sure to crochet fairly tight and even. That's all you need from crochet basics. Now you can go ahead and make your own hyperbolic plane. You have to increase (by the above procedure) the number of stitches from one row to the next in a constant ratio, N to N+1 the ratio determines the radius (the r in the annular hyperbolic plane) of the hyperbolic plane. You can experiment with different ratios BUT not in the same model. You will get a hyperbolic plane ONLY if you will be increasing the number of stitches in the same ratio all the time.
Via Cellio, the 15 strangest buildings (number 13 made me laugh).
Or another option, living in a treehouse.
And then there's buildings made of food.
And drink: now you (well, only those with tickets, which I assume doesn't happen to include anyone reading this, but hey) can breathe your G and T.