13th International Conference on Membrane Computing - MTA Sztaki

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A. Alhazov, Yu. Rogozhin – one extra object is also sufficient for computational completeness (and what symport weight bound is enough), or – two extra objects are also necessary for computational completeness. Another problem is to bridge or further (see (3)) decrease the gap between 6 and 1 extra objects for symport of weight at most 3. Acknowledgments The first author acknowledges the project RetroNet by the Lombardy Region of Italy under the ASTIL Program (regional decree 6119, 20100618). References 1. A. Alhazov, R. Freund, Yu. Rogozhin: Computational Power of Symport/Antiport: History, Advances and Open Problems. In: R. Freund, Gh. Păun, G. Rozenberg, A. Salomaa: Membrane Computing, 6th <strong>International</strong> Workshop, WMC 2005, Vienna, Revised Selected and Invited Papers. Lecture Notes in Computer Science 3850, Springer, 2006, 1–30. 2. A. Alhazov, Yu. Rogozhin: Minimal Cooperation in Symport/Antiport P Systems with One Membrane. In: M.A. Gutiérrez-Naranjo, A. Riscos-Núñez, F.J. Romero- Campero, D. Sburlan: RGNC report 01/2005, University of Seville, Third Brainstorming Week on Membrane Computing, Fénix Editora, Sevilla, 2005, 29–34. 3. A. Alhazov, Yu. Rogozhin: The Power of Symport-3 with Few Extra Symbols. Tenth Brainstorming Week on Membrane Computing (M.A. Martínez-del-Amor, Gh. Păun, I. Pérez-Hurtado, F.J. Romero-Campero, Eds.), vol. 1, RGNC TR 1/2012, Fénix Editora, Sevilla, 2012, 61–68. 4. A. Alhazov, Yu. Rogozhin: One-Membrane Symport with Few Extra Symbols. <strong>International</strong> Journal of Computer Mathematics, 2012, submitted. 5. R. Freund, A. Alhazov, Yu. Rogozhin, S. Verlan: Communication P Systems. Chapter 5 in: Gh. Păun, G. Rozenberg, A. Salomaa: The Oxford Handbook of Membrane Computing, 2010, 118–143. 6. P. Frisco, H.J. Hoogeboom: P Systems with Symport/Antiport Simulating Counter Automata. Acta Informatica 41, 2004, 145-170. 7. A. Păun, Gh. Păun: The Power of Communication: P Systems with Symport/Antiport. New Generation Computing 20, 2002, 295-305. 124
<strong>13th</strong> <strong>International</strong> <strong>Conference</strong> on Membrane Computing, CMC13, Budapest, Hungary, August 28 - 31, 2012. Proceedings, pages 125 - 141. Mobile Membranes with Objects on Surface as Colored Petri Nets Bogdan Aman 1,2 and Gabriel Ciobanu 1,2 1 “A.I.Cuza” University of Iaşi 2 Romanian Academy, Institute of Computer Science Blvd. Carol I no.8, 700505 Iaşi, Romania bogdan.aman@gmail.com, gabriel@info.uaic.ro Abstract. Mobile membranes with objects on surface represent a rulebased formalism involving parallelism and mobility. We use this class of mobile membranes to model the low-density lipoprotein degradation. A translation of this formalism into colored Petri nets is provided in order to analyze, using CPN Tools, some important properties of mobile membranes: reachability, boundedness, liveness, fairness. In order to show how this translation works, we translate the model of the low-density lipoprotein degradation using mobile membranes into colored Petri nets. 1 Introduction Formal models are used for many purposes, and each purpose influences the degree of abstraction and detail. If we provide a greater detail, the number of systems to which our model applies will decrease. A formal model should have three properties, and each of these properties trades off against the other two [12]: generality: the number of systems and situations to which the model correctly applies, realism: the degree to which the model mimics the real world, power and precision: collection of revealed properties, and the accuracy of the model predictions. In this paper we use two formalisms: mobile membranes (realism, being inspired by cell biology) and colored Petri nets (power and precision provided by complex software tools). A relation can be established between these two formalisms by providing an encoding of mobile membranes into colored Petri nets. By considering the endocytic pathway for low-density lipoprotein degradation, we show how mobile membranes can be used to model such a biological phenomenon, while colored Petri nets can be used to analyze and verify automatically some behavioral properties of this pathway. The endocytic pathway for low-density lipoprotein (LDL) degradation has been modeled before using other formalisms (e.g., bioambients [15]). However, none of the previous descriptions of the pathway is not translated into a formalism having software tools able to check automatically some complex behavioral properties. The first connections between membrane systems and Petri nets are presented in [6] and [16]. In [10], a direct structural relationship between these two 125
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Erzsébet Csuhaj-Varjú Marian Gheo
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Editors Erzsébet Csuhaj-Varjú Dep
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Preface In addition to the texts or
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Contents M.A. Martínez-del-Amor, I
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(Tissue) P systems with decaying ob
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Sorin Istrail, Solomon Marcus of pr
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Sorin Istrail, Solomon Marcus 4.
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Sorin Istrail, Solomon Marcus his f
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Turing’s three pioneering initiat
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Turing’s three pioneering initiat
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MP systems for systems biology tere
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Yu. Rogozhin this obstacle and to g
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Yu. Rogozhin 10. J. Cocke, M. Minsk
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M. Stannett The question arises, wh
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Regular Contributions
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T. Ahmed, G. DeLancy, A. Paun almos
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H. ElGindy, R. Nicolescu, H. Wu ter
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A formal framework for P systems wi
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A new approach for solving SAT by P
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Maintenance of chronobiological inf
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4 3.5 3 2.5 2 1.5 1 0.5 0 0 50 100
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Using a kernel P system to solve th
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Spiking neural P systems with funct
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L.F. Macías-Ramos, M.J. Pérez-Jim
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Membranes with local environments A
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Membranes with local environments T
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Membranes with local environments -
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Membranes with local environments -
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Membranes with local environments I
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On efficient algorithms for SAT dis
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On efficient algorithms for SAT 2.4
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On efficient algorithms for SAT 32.
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P. Sosík [9, 10], several research
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P. Sosík The rules of a system lik
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S. Verlan, J. Quiros more relevance
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Simplifying Event-B models of P sys
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Author Index Adorna H., 143 Agrigor
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13th International Conference on Membrane Computing - MTA Sztaki

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