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      Computing Using Signals: From Cells to P Systems 

      Ardelean, Ioan I.; Cavaliere, Matteo; Sburlan, Dragos (Fénix Editora, 2004)
      In cell biology one of the fundamental topic is the study of how biological signals are managed by cells. Signals can ...
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      Simulation of Mobile Ambients by P Systems. Part 2 

      Rogozhin, Vladimir; Boian, Elena (Fénix Editora, 2004)
      Ambient calculus is a theory which deals with mobile computing and computation and encompasses such notions as mobile ...
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      P Systems with Symport/Antiport of Rules 

      Cavaliere, Matteo; Genova, Daniela (Fénix Editora, 2004)
      Moving \instructions" instead of \data", using transport mecha- nisms inspired by biology { this could represent, shortly, ...
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      P Systems with Active Membranes and Two Polarizations 

      Alhazov, Artiom; Freund, Rudolf; Paun, Gheorghe (Fénix Editora, 2004)
      P systems with active membranes using only two electrical charges and only rules of types (a) and (c) assigned to at most ...
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      A Tissue P System and a DNA Microfluidic Device for Solving the Shortest Common Superstring Problem 

      Ledesma, Lucas; Manrique, Daniel; Rodríguez Patón, Alfonso; Silva, Andrés (Fénix Editora, 2004)
      This paper describes a tissue P system for solving the Shortest Common Superstring Problem in linear time. This tissue P ...
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      Simulating the Fredkin Gate with Energy-Based P Systems 

      Leporati, Alberto; Zandron, Claudio; Mauri, Giancarlo (Fénix Editora, 2004)
      Reversibility plays a fundamental role when the possibility to per- form computations with minimal energy dissipation is ...
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      On the Power of Deterministic EC P Systems 

      Alhazov, Artiom (Fénix Editora, 2004)
      It is commonly believed that a signi¯cant part of the computational power of membrane systems comes from their inherent ...
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      Sequential P Systems with Unit Rules and Energy Assigned to Membranes 

      Freund, Rudolf; Leporati, Alberto; Oswald, Marion; Zandron, Claudio (Fénix Editora, 2004)
      We introduce a new variant of membrane systems where the rules are directly assigned to membranes (and not to the regions ...
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      Deductive Databases and P Systems 

      Gutiérrez Naranjo, Miguel Ángel; Rogozhin, Vladimir (Fénix Editora, 2004)
      In computational processes based on backwards chaining, a rule of the type A Ã B1; : : : ;Bn is seen as a procedure which ...
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      Size and Power of Extended Gemmating P Pystems 

      Besozzi, Daniela; Csuhaj Varjú, Erzsébet; Mauri, Giancarlo; Zandron, Claudio (Fénix Editora, 2004)
      In P systems with gemmation of mobile membranes were ex- amined. It was shown that (extended) systems with eight membranes ...
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      About P Systems with Symport/Antiport 

      Frisco, Pierluigi (Fénix Editora, 2004)
      It is proved that four membranes su±ce to P systems with minimal symport/antiport to generate all recursively enumerable ...
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      (Ultimately Confluent) Parallel Multiset-Rewriting Systems with Context 

      Alhazov, Artiom; Sburlan, Dragos (Fénix Editora, 2004)
      The aim of this paper is to study the power of parallel multiset- rewriting systems with permitting context (or P systems ...
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      On P Systems with Promoters/Inhibitors 

      Ionescu, Mihai; Sburlan, Dragos (Fénix Editora, 2004)
      This article shows how the computational universality can be reached by using P systems with object rewriting context-free ...
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      Membrane Kauffman Networks 

      Franco, Giuditta (Fénix Editora, 2004)
      A formalization of Kauffman Boolean Networks in terms of P systems is suggested along two lines: by means of register machines and directly by means of membranes with receptors.
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      Covering Rules in P Systems: Some Preliminary Ideas 

      Sempere, José M. (Fénix Editora, 2004)
      In this paper we propose a new kind of rules inside the regions of a P system. We have called them covering rules due to ...
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      A Java Simulator for Basic Transition P Systems 

      Nepomuceno Chamorro, Isabel de los Ángeles (Fénix Editora, 2004)
      In this paper, a software tool (called SimCM, from Spanish Sim- ulador de Computaci¶on con Membranas) for handling P ...
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      A Note on Complexity Measures for Probabilistic P Systems 

      Sancho Caparrini, Fernando (Fénix Editora, 2004)
      In this paper we present a first approach to the definition of different entropy measures for probabilistic P systems in ...
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      Tissue-like P Systems with Channel-States 

      Freund, Rudolf; Paun, Gheorghe; Pérez Jiménez, Mario de Jesús (Fénix Editora, 2004)
      We consider tissue-like P systems with states associated with the links (we call them synapses) between cells, controlling ...
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      Cell Communication in Tissue P Systems and Cell Division in Population P Systems 

      Bernardini, Francesco; Gheorgue, Marian (Fénix Editora, 2004)
      Two classes of tissue P systems based on evolution communication rules are introduced, some results are proved, but many ...
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      Simulating Shuffle-Exchange Networks with P Systems 

      Ceterchi, Rodica; Pérez Jiménez, Mario de Jesús (Fénix Editora, 2004)
      We present in this paper a simulation with P systems of the parallel architecture known as shuffle-exchange network. This ...