<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>13</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Carlos Martín-Vide</style></author><author><style face="normal" font="default" size="100%">Gheorghe Paun</style></author><author><style face="normal" font="default" size="100%">Grzegorz Rozenberg</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Membrane systems with carriers</style></title><secondary-title><style face="normal" font="default" size="100%">Theoretical Computer Science</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Membrane computing</style></keyword><keyword><style  face="normal" font="default" size="100%">molecular computing</style></keyword><keyword><style  face="normal" font="default" size="100%">Natural computing</style></keyword><keyword><style  face="normal" font="default" size="100%">P systems</style></keyword><keyword><style  face="normal" font="default" size="100%">Turing computability</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2002</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://portal.acm.org/citation.cfm?id=566256</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Elsevier</style></publisher><pub-location><style face="normal" font="default" size="100%">Amsterdam (The Netherlands)</style></pub-location><volume><style face="normal" font="default" size="100%">270</style></volume><pages><style face="normal" font="default" size="100%">779-796</style></pages><abstract><style face="normal" font="default" size="100%">A membrane system is a model of computation which is inspired by some basic features of biological membranes. In this paper we consider another biologically inspired notion, viz., the notion of a carrier (or vehicle), as, e.g., used in gene cloning. We investigate the power of membrane systems where the rules for the evolving of objects are replaced by the rules that carry objects (by vehicles) through membranes. It turns out that these systems (even with a small number of membranes, a small number of carriers, and a small number of passengers taken by carriers) are computationally universal. 

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