Tuesday, March 9, 2021

Geometry Links - March 9, 2021

 Snowflakes in reverse

https://youtu.be/AzQwVM2vr7E


More giant snow designs
https://www.bbc.com/news/world-europe-56024213

Morph - "486 stepper motors, 86,000 LEDs and a 5 channel granular synth engine"
https://twitter.com/nburdy/status/1360220925820604419
https://twitter.com/nburdy/status/1360221061594423297
https://twitter.com/nburdy/status/1360221185536098304

Chaldny Figures, Cymatics, and the visualization of sound
https://publicdomainreview.org/collection/chladni-figures-1787
https://youtu.be/Yw13EAX3cZk  - visualization starts about one minute in

Inflatable greenhouse structure
https://www.intelligentliving.co/inflatable-bamboo-structure-greenhouse/

2-D Nanomaterials “kinked” to become transistors or computer chips
https://scitechdaily.com/graphene-nano-origami-creates-tiniest-microchips-yet-could-make-computers-and-phones-thousands-of-times-faster/
https://pubs.acs.org/doi/10.1021/acsnano.0c06701

New crystalline form for ice:  Ice XIX
https://scitechdaily.com/exotic-ice-xix-new-crystalline-ice-form-decoded/
Editorial Comment:  A fictional Ice Nine appears in Kurt Vonnegut’s Cat’s Cradle.  Vonnegut’s brother, Bernard Vonnegut, was an atmospheric scientist who used silver iodide for cloud seeding.

Turing Patterns - a deep dive
https://www.dailykos.com/stories/2021/2/24/2017885/-Cool-weirdness-or-weird-coolness-a-deepish-dive-celebrating-basic-science-in-its-esoteric-glory

Rubbish Things
https://decodesign1031.wixsite.com/mysite/blank-3
https://pen-online.com/arts/takuto-ohta-creates-strange-moving-sculptures/
Editorial Comment:  Reminds me of Theo Jansen’s Strandbeests crossed with Miyazaki’s anime yokai (Japanese spirit creatures)

Murmurations - the shape of the flights of flocks of starlings avoided a hawk
https://vimeo.com/370007362
More at http://geometrylinks.blogspot.com/2017/05/
Ornitographies by Xavi Bou
http://timewheel.net/amazing-chronophotographs-capture-patterns-birds-flight/
http://www.xavibou.com

Unfolding “locked letters"
https://www.nature.com/articles/s41467-021-21326-w.epdf
https://www.nytimes.com/2021/03/02/science/locked-letters-unfolding.html
hat tip boingboing.net
https://boingboing.net/2021/03/02/opening-an-intricately-folded-locked-letter-from-c-1700.html

Dots rotating around nested set of polygons
https://i.imgur.com/tWq3D7l.gifv

Joe Clinton models the tetra in an octa and a chiral transformation of the octahedron
https://vimeo.com/516885063
Editorial Comment:  The tetra in octa model I published has inspired not only Joe Clinton but John Kostick and Tom Miller to do more work modelling and analyzing that structure.  That inspired me to correct and update my published nets for all
25 Interrelations of the Platonic Solids (Updated)
http://geometrylinks.blogspot.com/2017/11/the-25-interrelations-of-platonic-solids.html

I’m currently working on modelling the relations between the 5 Platonics and both rhombic dodecahedra.   If somebody knows of a model of the pentagonal dodeca and the regular icosa inscribed within either rhombic dodeca I would love to see it.  Modelling the the tetra, cube, and icosa within either rhombic dodeca is interesting but fairly easy but I haven’t figured out the icosa and pentagonal dodeca inside the rhombic dodeca yet.

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