Sleepers A Poem by Nick Trombley m o t i o n l e s s m o t i o n l s e s m o t i o n s l e s m o t i o s n l e s m o t i s o n l e s m o t s i o n l e s m o s t i o n l e s m s o t i o n l e s s m o t i o n l e s s o m t i o n l e s s o m t i n o l e s s o m t n i o l e s s o m n t i o l e s s o m n t o i l e s s o m n o t i l e s s o m n o t l i e s s o m n o l t i e s s o m n o l i t e s Concrete poetry sleepeuphony
Because we have to sleep Two nights later, as he was getting ready to bed down, the boy looked for the star they followed every night. He thought that the horizon was a bit lower than it had been, because he seemed to see stars on the desert itself. "It's the oasis," said the camel driver. "Well, why don't we go there right now?" the boy asked. "Because we have to sleep." Paulo Coelho, The Alchemist sleep
To carve a volume into the void of darkness The nocturnal sound is a reminder of human solitude and mortality, and it makes one conscious of the entire slumbering city. Anyone who has become entranced by the sound of dripping water in the darkness of a ruin can attest to the extraordinary capacity of the ear to carve a volume into the void of darkness. The space traced by the ear in the darkness becomes a cavity sculpted directly in the interior of the mind. Juhani Pallasmaa, The Eyes of the Skin: Architecture and the Senses sounddarknesssleepsolitude
Traced in the summer skies Yes, it was the hour when, a long time ago, I was perfectly content. What awaited me back then was always a night of easy, dreamless sleep. And yet something had changed, since it was back to my cell that I went to wait for the next day…as if familiar paths traced in summer skies could lead as easily to prison as to the sleep of the innocent. Albert Camus, The Stranger sleepcrime
Wang tiles Wang tiles (Hao Wang, 1961) are a class of formal systems. They are modelled visually by square tiles with a color on each side. A set of such tiles is selected, and copies of the tiles are arranged side by side with matching colors, without rotating or reflecting them. The basic question about a set of Wang tiles is whether it can tile the plane or not, i.e., whether an entire infinite plane can be filled this way. The next question is whether this can be done in a periodic pattern. In 1966, Wang's student Robert Berger solved the problem in the negative. He proved that no algorithm for the problem can exist, by showing how to translate any Turing machine into a set of Wang tiles that tiles the plane if and only if the Turing machine does not halt. The undecidability of the halting problem then implies the undecidability of Wang's tiling problem. Wikipedia en.wikipedia.org Truchet TilesThe Tiling Patterns of Sebastien Truchet and the Topology of Structural Hierarchy mathalgorithms