Tweet Archive 2019 01
RT @end_tt: ウィア・フェラン泡（ Wearie-Phelan Bubbles ） http://www.geocities.jp/ikuro_kotaro/koramu/7298_w7.htm http://www.steelpillow.com/polyhedra/wp/wp.htm 同じ体積の十二面体（黒）と十四面体（赤青緑）で空間が隙間なく埋めつくされる。（曲率を取り…
Interesting artificial chemistry experiment. Entities drift around and are more likely to replicate if a hash of entities nearby gives a higher value. A bit like in bitcoin mining - the hash function is an completely arbitrary mapping just used to give the space some complexity. https://twitter.com/HirokiSayama/status/1082091347807555592
Replying to @tim_hutton
(Assuming my summary is vaguely correct - @HirokiSayama ?)
Reminds me of Peter Bentley’s work on using the Mandelbrot set as a source of complexity for artificial life. http://discovery.ucl.ac.uk/171670/
It’s cute that kitty’s vision system is triggered by television but terrifying by analogy with our own cognitive system.
Recently we noticed that we have neither saucers nor wine glasses in our house and we miss neither of them. https://twitter.com/bronactitley/status/1080396019920240640
@OrdnanceSurvey What is the longest cycle ride I can do that is downhill all the way?
Replying to @OrdnanceSurvey
Thanks, but only 4.2km? :) There must be some continuous road route that is still downhill all the way but longer than that?
Replying to @OrdnanceSurvey
I only ask because I liked your recent post about the longest non-road straightline walk and I’m hoping you can write another database query for me. Thanks! https://twitter.com/geoviews/status/1083287144872009728
Replying to @johncarlosbaez, @hamish_todd, @roice713, @gregeganSF and @wtgowers
Are there tools available for exporting from G+ to e.g. separate html files?
A giant Galton Board for humans. https://twitter.com/Rainmaker1973/status/1085484352992133120
RT @memecrashes:
Replying to @wtgowers
She will love lakh and crore. There must be a culture that has a special word for 10,000?
[Before sending:] Oh! See the link, there is/are!. Myriad, reveva, man, meun, patinayiram… https://en.wikipedia.org/wiki/10,000
So much purring was captured in this image that your screen is now vibrating.
RT @jenterysayers: I teach a 60-student course on Technology and Society. This year, after some nudging, I decided to compose a list of tip…
Replying to @jenterysayers
How do I pin someone else’s tweet?
Replying to @CmonMattTHINK, @shapeways and @openscad
These are some beautiful polar zonohedra.
Replying to @robinhouston and @apgox
The same idea, made with Toblerones: https://www.reddit.com/r/mathpics/comments/9l1za6/toblerone_burr_by_gianni_sarcone/
Replying to @brianeubanks, @apgox and @robinhouston
Sounds like something we should implement in Ready! https://github.com/GollyGang/ready I think it’s the first CA I’ve heard of on an FCC system.
Replying to @brianeubanks, @apgox and @robinhouston
Does this look right? The Ready file is here: https://github.com/GollyGang/ready/tree/gh-pages/Patterns/CellularAutomata/FCC3333
There are lots of interesting blinkers that appear. I haven’t seen a glider yet. Is there a write-up of this CA somewhere?
Replying to @brianeubanks, @apgox and @robinhouston
Oo! A glider appeared. Here it is, emerging from the ash:
Replying to @brianeubanks, @apgox and @robinhouston
Thread for discussion on http://conwaylife.com: http://www.conwaylife.com/forums/viewtopic.php?f=11&t=3757
Ok this is great. Makes me want to map some mountains with only home-made instruments. https://twitter.com/fermatslibrary/status/1087747789415768068
Replying to @lisyarus
There’s a nice simple system in the links of the description of this video: https://www.youtube.com/watch?v=6zwqkFkLj2U
Replying to @lisyarus
Naoaki Ono’s PhD thesis used to live here: http://www.his.atr.co.jp/~nono/publications/dthesis.ps.gz But the link is now broken. Hopefully a version can still be found somewhere.
Failing that we can extract the parameters etc. from the code here: https://www.openprocessing.org/sketch/43168
RT @julleor: Damier
When I wrote some code to teach myself #WebAssembly I didn’t think it would end up in a book. I might have put more effort into the example, instead of just ‘moving blue square inside a red square’! https://github.com/timhutton/sdl-canvas-wasm
Replying to @KangarooPhysics, @fdecomite and @RobFathauerArt
I’ve never managed to understand this paper but I’d like to - is there an easier explanation somewhere?
Replying to @Mesh_Geometry, @KangarooPhysics, @fdecomite and @RobFathauerArt
Danzer tetrahedra? As in:
Danzer, L. (1989), “Three-Dimensional Analogs of the Planar Penrose Tilings and Quasicrystals”, Discrete Mathematics, 76 (1): 1–7. https://www.sciencedirect.com/science/article/pii/0012365X89902823?via%3Dihub ?
Replying to @KangarooPhysics, @fdecomite, @RobFathauerArt and @Mesh_Geometry
These links have helped me understand more: http://www.ams.org/publicoutreach/feature-column/fcarc-ribbons https://github.com/neozhaoliang/pywonderland/blob/master/src/aperiodic-tilings/debruijn.py
Replying to @kat_volk
No spoilers!
Replying to @BertChakovsky, @HirokiSayama, @thomasschmickl and @mrob_27
This system, by Naoaki Ono, is beautiful in its simplicity.
https://youtu.be/6zwqkFkLj2U
Replying to @productops, @jmugan, @DeepGrammar, @DataDayTexas and @alex_lamb
Insightful quote!
Also it’s sort of the plot of Ted Chiang’s story Understand, where super-intelligent humans get to the point where their delta is vanishingly small.
Was coding with my daughter and I didn’t bother to clear the background when working on this scrolling image thing, and it gave a creepy effect that you don’t notice at first, as if you have reached the end of the world. https://www.openprocessing.org/sketch/658709/
RT @cs_kaplan: Here’s one featuring hexagons dividing into three, based on a request by @RobFathauerArt. This one needs to be rendered in a…
@DanielZeichner Can you explain to me why MPs are ignoring the fact that the UK doesn’t want Brexit any more? Are they just caught up in some bizarre Westminster bubble? https://twitter.com/EuropeElects/status/1090964331779510274