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Nobili Cellular Automaton
Nobili cellular automata (NCA) are a variation of von Neumann cellular automata (vNCA), in which additional states provide means of memory and the interference-free crossing of signal. Nobili cellular automata are the invention of Renato Nobili, a professor of physics at the University of Padova in Padova, Italy. Von Neumann specifically excluded the use of states dedicated to the crossing of signal. The confluent state is altered, so that it acts as a signal crossing organ if exactly two signal paths are incident (they enter and leave the confluent state), or acts as a memory organ if only inputs exist. The benefit of these alterations to the state set of von Neumann cellular automata is that signal crossing is greatly eased, configurations are slightly smaller than the corresponding configuration of von Neumann cellular automata, and the computational throughput is increased. Signal crossing in vNCA In von Neumann's original cellular automaton, the crossing of signals is muc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Von Neumann Cellular Automata
Von Neumann cellular automata are the original expression of cellular automata, the development of which was prompted by suggestions made to John von Neumann by his close friend and fellow mathematician Stanislaw Ulam. Their original purpose was to provide insight into the logical requirements for machine self-replication, and they were used in von Neumann's universal constructor. Nobili's cellular automaton is a variation of von Neumann's cellular automaton, augmented with the ability for confluent cells to cross signals and store information. The former requires an extra three states, hence Nobili's cellular automaton has 32 states, rather than 29. Hutton's cellular automaton is yet another variation, which allows a loop of data, analogous to Langton's loops, to replicate. Definition Configuration In general, cellular automata (CA) constitute an arrangement of finite state automata (FSA) that sit in positional relationships between one another, each FSA exchanging inf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Renato Nobili
Renatus is a first name of Latin origin which means "born again" (natus = born). In Italian, Portuguese and Spanish it exists in masculine and feminine forms: Renato and Renata. In French they have been translated to René and Renée. Renata is a common female name in the Czech Republic, Croatia, Lithuania, Poland and Slovakia. The feminine Renate is common in German, Dutch and Norwegian. In Russia the names Renat (russian: Ренат, links=no) (usually as Rinat) and Renata (russian: Рената, links=no) are widespread among the Tatar population. The name has a spiritual meaning, i.e., to be born again with baptism, i.e., from water and the Holy Spirit. It was extensively adopted by early Christians in ancient Rome, due to the importance of baptism. The onomastic is Saint Renatus, a martyr, Bishop of Sorrento in the 5th century, which is celebrated on 6 October. In Persian Mithraism, which spread widely in the West as a religion of the soldiers and officials ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Padova
The University of Padua ( it, Università degli Studi di Padova, UNIPD) is an Italian university located in the city of Padua, region of Veneto, northern Italy. The University of Padua was founded in 1222 by a group of students and teachers from Bologna. Padua is the second-oldest university in Italy and the world's fifth-oldest surviving university. In 2010, the university had approximately 65,000 students. In 2021, it was ranked second "best university" among Italian institutions of higher education with more than 40,000 students according to Censis institute, and among the best 200 universities in the world according to ARWU. History The university is conventionally said to have been founded in 1222 when a large group of students and professors left the University of Bologna in search of more academic freedom ('Libertas scholastica'). The first subjects to be taught were law and theology. The curriculum expanded rapidly, and by 1399 the institution had divided in two: a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
XOR Gate
XOR gate (sometimes EOR, or EXOR and pronounced as Exclusive OR) is a digital logic gate that gives a true (1 or HIGH) output when the number of true inputs is odd. An XOR gate implements an exclusive or (\nleftrightarrow) from mathematical logic; that is, a true output results if one, and only one, of the inputs to the gate is true. If both inputs are false (0/LOW) or both are true, a false output results. XOR represents the inequality function, i.e., the output is true if the inputs are not alike otherwise the output is false. A way to remember XOR is "must have one or the other but not both". An XOR gate may serve as a "programmable inverter" in which one input determines whether to invert the other input, or to simply pass it along with no change. Hence it functions as a inverter (a NOT gate) which may be activated or deactivated by a switch. XOR can also be viewed as addition modulo 2. As a result, XOR gates are used to implement binary addition in computers. A half add ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
