Month: January 2006

links for 2006-01-27

shetkaSTONE – Products made from recycled paper. fully recycled building material made from paper- created right down the road from my house. (tags: paper recycling building construction ethicalreuse) Unicorn Precinct XIII Hacker / Social Activist B&B. things to do in san francisco. (tags: SF sanfrancisco hacker house upxiii)

Star spring, standing

Star spring, standing Originally uploaded by Melisande*. Mélisande folded one of Fujimoto’s designs after some long hard work looking for the crease pattern. Here’s her flickr text: ————- Creator : Shuzo Fujimoto CP in book : Origami El Mundo Nuevo, by Kasahara, published 1989 by Sanrio(Japan), ISBN 4387892544. This is a baby star spring : original model starts from square paper and has 10 stars. I was intimidated by the idea of collapsing points by rows of 10, so I reduced the thing to a rectangle 12/22. Here you see 5 stars and 2 half-stars instead of the 6 I’ve planned, I probably made a wrong valley/mountain assignement during collapse, cannot read japanese instructions. Nevertheless, I’m glad how it turned out. It is a wonderfull model, another side of Fujimoto’s genius. I don’t know if it should be called a tessellation ? Maybe it is closer to box-pleating ? Infinite-origami made last year a ridged triangle tessellation that shares some similarities with the above. I’ve seen this before, in the photos of Dribalz (Dr Eyeballs?), …

Voronoi tessellation, test 1 (twisted)

random polygon tessellation, test 1 (twisted) Originally uploaded by Ori-gomi. a test piece from a new working theory of pleating. polygons are defined by the same methodology used to make Voronoi tessellations; borders are then used as a reference crease along with the central point of the polygon to create the appropriate “fold flat” crease pattern. in this case, you can see the original 1/2 pleat creasings, which were further divided into 1/4 width pleats. This was a test using random polygons; other methods of more usefulness (applications for use with regular polygonal shapes) are in development. much fruit on this tree, I think. I hope I am able to refine my ideas enough to make them usable. if you find this idea interesting at all, please drop me a line at origomi [ at ] I’d be happy to talk to you about it. the untwisted version, below.

links for 2006-01-25

The Ascent Wooden Gear Clock, available as a kit or plans. thanks jbum @ flickr! great gift idea for my dad. (tags: giftideas woodenclock clock gears DIY) The Regular Pentagon interesting page on pentagonal geometry, various methods of folding one from paper, and other ways to generate the proper angles/measurements. (tags: origami pentagon goldenrectangle phi geometry)

Geometry without language

The always fascinating Future Feeder points out a story in the January 20th issue of Science, about a tribe in Brazil’s Amazon jungle which has no language for geometry but still understands it, in some cases as well as American adults. (Although as an American adult, I’m not really sure that’s actually saying much. -Eric) There’s something a little satisfying in knowing that the human mind is capable of intuitive leaps with or without a huge societal support structure in place to coddle it. link is here; NY Times article is here.