The Nothing itself nothings. Bret Victor, beast of burden. Djambi. Un article de Wikipédia, l'encyclopédie libre. Djambi (L'échiquier de Machiavel) est un jeu de société basé sur la négociation. Initialement prévu pour 4 joueurs, il est possible d'y jouer à 3. Des adaptations non officielles pour 5 et 6 joueurs ont été proposées. La case centrale : un tremplin, pas un abri[modifier | modifier le code] Seul un chef de parti peut l’occuper en permanence : c’est le siège du pouvoir légal, tremplin traditionnel vers le pouvoir absolu.
Marche des pièces[modifier | modifier le code] Toutes les pièces se déplacent comme les dames aux échecs, à l’exception des militants, qui ont un rayon d'action limité à deux cases. La prise des pièces[modifier | modifier le code] N’importe quelle pièce est prenable – elle est alors retournée et replacée sur le terrain. Le rôle des pièces[modifier | modifier le code] Celles qui ne tuent pas: les déplaceurs[modifier | modifier le code] Heron's fountain. Heron's fountain is a hydraulic machine invented by the 1st century AD inventor, mathematician, and physicist Heron, also known as Hero of Alexandria.
Heron studied the pressure of air and steam, described the first steam engine, and built toys that would spurt water, one of them known as Heron's fountain. Various versions of Heron's fountain are used today in physics classes as a demonstration of principles of hydraulics and pneumatics. Construction[edit] Heron's fountain is built as follows: Start with a basin, open to the air.
Motion[edit] Heron's fountain is not a perpetual motion machine.[1] If the nozzle of the spout is narrow, it may play for several minutes, but it eventually comes to a stop. Its action may seem less paradoxical if it considered as a siphon, but with the upper arch of the tube removed, and the air pressure between the two lower containers providing the positive pressure to lift the water over the arch. Geological phenomena[edit] In popular culture[edit] Notes[edit]
Pythagorean cup. Cross section Cross section of a Pythagorean cup.
A Pythagorean cup (also known as a Pythagoras cup, a Greedy Cup or a Tantalus cup) is a form of drinking cup that forces its user to imbibe only in moderation. Credited to Pythagoras of Samos, it allows the user to fill the cup with wine up to a certain level. If he fills the cup only to that level, the imbiber may enjoy a drink in peace. If he exhibits gluttony, however, the cup spills its entire contents out of the bottom (onto the lap of the immodest drinker).[1] Form and function[edit] Kill Your Darlings.
There is nothing like the moment when you suddenly come upon the answer to a design problem.
Whether it is a particular interaction or the perfect design element, it is a moment of pure elation. However, in that moment, there is a always a risk of an emotional attachment being formed. Essentially, we have the potential to surrender our ability to see beyond the “perfect solution” we have just created. Arthur Quiller-Couch, a British journalist, critic, and novelist once said,"Murder your darlings. " While this quote was aimed at aspiring writers, I believe that it is equally relevant to designers. Essentially, the elements of your design that you really love cause you to have what I call “design blindness.” So should we automatically abandon any design that we become personally attached to? Yes. Yes, because of the lack of objectivity and the potential for that to erode your better judgement for the remainder of the project.
"Kill your darlings.
Think Quarterly by Google. Mathematica Graphics Gallery. Working out the Left-right-left combination to a lock. Conventionally, a combination lock is opened by turning the dial two turns to the right, then to the first number, one turn left, and left to the second number, and then right again to the last number.
This series of turns causes the rotors of the locks to have their notches aligned with each other (see wooden combination lock model) However, there's nothing that prevents you from starting the combination counterclockwise instead of clockwise, and conventional combination locks can indeed be opened this way. Because the tabs on the rotors have non-zero thickness, slightly less than a full turn is needed to catch subsequent rotors. Submarine Cable Map.
TheRSAorg. Solar System Scope. No Tricks: Risk, Security, Math, Crypto. Inventions and Ideas from Science Fiction Books and Movies at Technovelgy.com.