Safety cut rope axe man In the first nuclear reactor, constructed by Enrico Fermi in 1942 under the bleachers of the University of Chicago football stadium, the control rods were held up by a manila rope. A man with an axe was told to cut the rope if the reactor got out of hand. This "safety cut rope axe man" is supposedly the origin of the term SCRAM for an emergency shutdown procedure. Brian Hayes, Infrastructure: A Guide to the Industrial Landscape wordsacronymsenergy
197. Thick Walls Problem Houses with smooth hard walls made of prefabricated panels, concrete, gypsum, steel, aluminum, or glass always stay impersonal and dead. Solution Open your mind to the possibility that the walls of your building can be thick, can occupy a substantial volume—even actual usable space—and need not be merely thin membranes which have no depth. Decide where these thick walls ought to be. Christopher Alexander, Murray Silverstein & Sara Ishikawa, A Pattern Language Zeniba's house