Introduction To Automata Theory, Languages, And Computation
Introduction To Automata Theory, Languages, And Computation
Regulated Rewriting in Formal Language Theory
Regulated Rewriting in Formal Language Theory
Membrane Computing: An Introduction
Membrane Computing: An Introduction
The power of communication: P systems with symport/antiport
New Generation Computing
Computation: finite and infinite machines
Computation: finite and infinite machines
WMC'04 Proceedings of the 5th international conference on Membrane Computing
P systems with adjoining controlled communication rules
FCT'07 Proceedings of the 16th international conference on Fundamentals of Computation Theory
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Membrane systems are parallel computational devices inspired from the cell functioning. Since the original definition, a standard feature of membrane systems is the fact that each rule of the system is executed in exactly one time-unit. However, this hypothesis seems not to have a counterpart in real world. In fact, in cells, chemical reactions might take different times to be exe-cuted. Therefore, a natural step is to associate to each rule of a membrane system a certain time of execution. We are interested in membrane systems, called time-free, working independently from the assigned execution time of the rules. A basic and interesting problem in time-free membrane systems consists in the synchronization of different rules, running in parallel, and having unknown execution times. Here, we present different ways to approach this problem within the framework of membrane systems. Several research proposals are also suggested.