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#penrose

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Continued thread

@bookstodon

But perhaps the most interesting wrinkle in Shadows of the Mind is #Penrose's excursion into microbiology, where he examines cytoskeletons and microtubules, minute substructures lying deep within the brain's neurons. (He argues that #microtubules--not neurons--may indeed be the basic units of the brain, which, if nothing else, would dramatically increase the brain's computational power.)

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@bookstodon

#Penrose cuts a wide swathe through modern science, providing penetrating looks at everything from Turing machines (computers programmed from artificial intelligence) to the implications of Godel's theorem maintaining that conscious thinking must indeed involve ingredients that cannot adequately be stimulated by mere computation.

#KnowledgeBit: The #Penrose #Stairs are a two-dimensional optical illusion that depicts a staircase that forms a continuous loop. The stairs make four 90-degree turns as they ascend or descend.

When viewed from a specific angle, it gives the illusion that the stairs are continuously ascending or descending. However, the structure is physically impossible to exist in three-dimensional space.

knowledgezone.co.in/kbits/652a

Replied in thread

Das Ganze gibt es natürlich auch als Animation. Im Computer kann durchaus auf der Treppe im Kreis gegangen werden.
Betrachtet man die Szene aus einer anderen Perspektive, so kann man sehen, dass die Figürchen von der höchsten Stufe auf die niedrigste springen müssen und umgekehrt. Und das natürlich ohne Zeitverzug.

Continued thread

Die Konstruktion der Escher-Treppe: Links aus der "Escher-Perspektive" gesehen, rechts aus einer beliebigen anderen Richtung.
Die optische Täuschung ist ein Phänomen der Perspektive, die Treppe existiert in der Realität.

Für Besserwisser: Die Treppe muss natürlich oben ein wenig schmaler sein als unten, damit die Stufen in der Perspektive zusammenpassen