Pedagogium

La commission avait alors statué qu'il n'était pas possible de prédire une éventuelle secousse plus forte. Le 6 avril 2009, un séisme de 6,3 sur l'échelle de Richter ravagea la ville de L'Aquila, dans les Abruzzes. Plus de 300 personnes ont trouvé la mort à la suite du tremblement de terre.

La tenue d'un procès et la condamnation à la prison de ces scientifiques ont provoqué une onde de choc dans le milieu scientifique international, où on estime qu'il est impossible, même pour les experts le plus aguerris, de prévoir les tremblements de terre.

« Dans une décision qui provoque une onde de choc dans la communauté de géophysique aux États-Unis, un tribunal italien a condamné six scientifiques à six ans de prison pour ne pas avoir prédit un séisme, ce qui est absurde et dangereux »,

STL (file format)

STL (STereoLithography) is a file format native to the stereolithography CAD software created by 3D Systems. STL is also known as Standard Tessellation Language[1] This file format is supported by many other software packages; it is widely used for rapid prototyping and computer-aided manufacturing. STL files describe only the surface geometry of a three dimensional object without any representation of color, texture or other common CAD model attributes. The STL format specifies both ASCII and binary representations. Binary files are more common, since they are more compact

In everyday life and in classical physics, events are ordered in time: a cause can only influence an effect in its future not in its past. As a simple example, imagine a person, Alice, walking into a room and finding there a piece of paper. After reading what is written on the paper Alice erases the message and leaves her own message on the piece of paper. Another person, Bob, walks into the same room at some other time and does the same: he reads, erases and re-writes some message on the paper. If Bob enters the room after Alice, he will be able to read what she wrote; however Alice will not have a chance to know Bob's message. In this case, Alice's writing is the "cause" and what Bob reads the "effect". Each time the two repeat the procedure, only one will be able to read what the other wrote. Even if they don't have watches and don't know who enters the room first, they can deduce it by what they write and read on the paper. For example, Alice might write "Alice was here today", such that if Bob reads the message, he will know that he came to the room after her.