Tweet Archive 2019 08
RT @KangarooPhysics:
Replying to @gregeganSF
https://youtu.be/noLJ_ktAxQE?t=9
RT @emiladiels: I just liked “10 years of BRG in 20 seconds” on #Vimeo: https://vimeo.com/352453133
I love this image so much. It makes me laugh every time. It’s in Saito et al. (2018) http://vgl.ict.usc.edu/Research/3dhairsynthesis/
Pets are people too.
RT @jonnorris12: It’s all very well using WW2 analogies to say we will get through Brexit, ‘spirit of the blitz’ and all that, but can you…
Like a 1D version of Langton’s Ant, that behaves chaotically until falling into a loop and making a highway. https://twitter.com/numberphile/status/1159427224468099073
Working with AR and VR and XR and MR, I suppose it is no wonder that reading work emails about HR sometimes causes confusion.
The phase diagram of manual car driving. It’s such a strange interface! The parameterisation is all wrong. The dials don’t tell you if you’re about to stall or if the engine is racing. You have to navigate the phase space by feeling the vibrations from the engine!
Replying to @tim_hutton
Above the balancing-on-the-hill line it doesn’t make any sense to have the handbrake off (because you’ll roll backwards). Below the line it doesn’t make any sense to have the handbrake on. But there’s nothing in the car that tells you whether you’re above the line or below it!
Replying to @tim_hutton
I appreciate this tweet is 120 years too late. Sorry about that.
RT @benorlin:
RT @ThomasHelzle: Organics: “Spin”
A multidimensional spider, when dancing, is leaving behind a cloud of intricate structures…
@sidefx…
Replying to @panlepan and @geogebra
It seems like an odd coincidence that the rays arrive at the same time. Is the same true for a lens? Is there a shape that reflects/refracts parallel light rays to a focal point where the rays don’t arrive at the same time?
Replying to @panlepan and @geogebra
To answer my second question, there are plenty of shapes that bring light to a focus but with a time delay - e.g. a split parabola with y=x^2 and y=0.5x^2-0.25, as shown. I’ve no idea why you’d want such a thing since mostly this would cause motion blur, as you point out.
Replying to @3Dmattias, @panlepan and @geogebra
I wonder if space telescope arrays account for this, with a different synchronisation depending on where they are pointing.
Replying to @panlepan and @geogebra
It does seem that with lenses the light arrives at the same time. See the discussion here: https://physics.stackexchange.com/questions/455847/why-do-lens-convex-not-introduce-any-path-difference-to-light-incident-on-it
Replying to @panlepan and @geogebra
Presumably this type of split reflector would eliminate one particular frequency of light, since you’d get destructive interference where the extra distance on one side was exactly half a wavelength.
Our kittens have found a spiky fren.
Replying to @dojo2007
made this:
“No one really knows what mattresses are meant to gain from their lives. They are large, friendly, pocket-sprung creatures that live quiet private lives in the marshes. Many of them get caught, slaughtered, dried out, shipped out and slept on. None of them seems to mind this.” https://twitter.com/RupertMyers/status/1163782026161459200
RT @MxdRealityDev: Check out some of the features you can use from the MRTK 2.0.0 release!
Note, the offset seen in the video is not what…
RT @divbyzero: Fascinating blog post by @cs_kaplan about a Nature paper that he contributed to about a molecule that is a polyhedral near-m…
RT @1ncognito___: I noticed African Architecture isn’t really showcased compared to Asian, European, Middle Eastern and Indian.
So here is…