Kitz Forum
Chat => Jokes n Stuff => Topic started by: broadstairs on July 03, 2016, 09:34:49 AM
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Just take a look at https://youtu.be/oWfFco7K9v8 (https://youtu.be/oWfFco7K9v8) and enjoy....
Stuart
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Clever stuff.
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Very interesting. :)
I wasn't completely sure of the exact shape of the object(s) but had a feeling for what they would be.
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No.... My brain is trying to compute that... and failed. :D
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Here is my illusion 40/10 to 80/20 amazing what you can do with a slight of hand on a text editor now that's magic ;D
Mode VDSL2
Traffic Type PTM
Status Up
Link Power State L0
Downstream Upstream
Line Coding (Trellis) On On
SNR Margin (dB) 6.3 6.1
Attenuation (dB) 25.1 0.0
Output Power (dBm) 11.2 3.2
Attainable Rate (Kbps) 138554 26511
Rate (Kbps) 79989 19998
B (# of bytes in Mux Data Frame) 227 191
M (# of Mux Data Frames in an RS codeword) 1 1
T (# of Mux Data Frames in an OH sub-frame) 0 42
R (# of redundancy bytes in the RS codeword) 10 8
S (# of data symbols over which the RS code word spans) 0.1903 0.9362
L (# of bits transmitted in each data symbol) 10003 1709
D (interleaver depth) 8 4
I (interleaver block size in bytes) 238 100
N (RS codeword size) 138 105
Delay (msec) 0 0
INP (DMT symbol) 51.00 48.00
OH Frames 0 0
OH Frame Errors 1069 192
RS Words 36 29
RS Correctable Errors 858 242
RS Uncorrectable Errors 0 0
HEC Errors 0 0
OCD Errors 0 0
LCD Errors 0 0
Total Cells 418 0
Data Cells 149 0
Bit Errors 0 0
Total ES 0 0
Total SES 0 0
Total UAS 0 0
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http://www.gizmodo.co.uk/2016/07/how-that-crazy-cylinder-illusion-works/ (http://www.gizmodo.co.uk/2016/07/how-that-crazy-cylinder-illusion-works/)
How it was done
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Brilliant. So much hard work has gone into making those shapes and getting the angles right.
Well at least we know that it was real even though it only works with specific lighting and angles. It would have been so much easier to do it digitally. :D
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Yes I wondered if someone would post the how to do it version.... I suppose in some ways it was done digitally in that a 3-D printer was used ;)
Stuart
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I wonder how a basic 3D-printer will cope with, say, Penrose stairs (https://en.wikipedia.org/wiki/Penrose_stairs), the Penrose triangle (https://en.wikipedia.org/wiki/Penrose_triangle) or a Möbius strip (https://en.wikipedia.org/wiki/M%C3%B6bius_strip)? :D
(https://upload.wikimedia.org/wikipedia/commons/thumb/3/34/Impossible_staircase.svg/200px-Impossible_staircase.svg.png) (https://upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Penrose-dreieck.svg/200px-Penrose-dreieck.svg.png) (https://upload.wikimedia.org/wikipedia/commons/thumb/d/d9/M%C3%B6bius_strip.jpg/320px-M%C3%B6bius_strip.jpg)
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It would be fun to try :)
On reflection, the Penrose stairs can be made very easily. All you have to do is slope each step down towards the back so that overall the stairs don't rise at all.
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Here's one of my favourites.
Watch this one first...
https://m.youtube.com/watch?v=l01eiXpM_20
Then this one shows how it's done.
https://m.youtube.com/watch?v=plQFXts2qlk
I actually made a copy out of some old timber. Nowhere near as good as the original, and propped up on long pegs rather than ropes, but it was suprisingly effective for just a couple of hours' work. Pity I can't find my own photos. :)
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I wonder how a basic 3D-printer will cope with, say, Penrose stairs (https://en.wikipedia.org/wiki/Penrose_stairs), the Penrose triangle (https://en.wikipedia.org/wiki/Penrose_triangle) or a Möbius strip (https://en.wikipedia.org/wiki/M%C3%B6bius_strip)? :D
(https://upload.wikimedia.org/wikipedia/commons/thumb/3/34/Impossible_staircase.svg/200px-Impossible_staircase.svg.png) (https://upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Penrose-dreieck.svg/200px-Penrose-dreieck.svg.png) (https://upload.wikimedia.org/wikipedia/commons/thumb/d/d9/M%C3%B6bius_strip.jpg/320px-M%C3%B6bius_strip.jpg)
I can't see a problem printing Penrose stairs.
I'm pretty sure Möbius strips should be printable too, after all they can be made out of cardboard, with a little glue. Or am I missing something?
Impossible triangles... I'd say No. They do 'exist' and are on display in various places, but all depend upon a perfect viewpoint to create the illusion, as per the impossible crate I posted.
Happy, as always, to be proven wrong. In fact this time, happier than ever to be proven wrong, these things do fascinate me. :D
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Love a good optical illusion, I remember loving magic eye books when i was young