{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,26]],"date-time":"2026-06-26T23:34:40Z","timestamp":1782516880468,"version":"3.54.5"},"reference-count":0,"publisher":"SAGE Publications","issue":"1-4","license":[{"start":{"date-parts":[[2013,1,1]],"date-time":"2013-01-01T00:00:00Z","timestamp":1356998400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Fundamenta Informaticae"],"published-print":{"date-parts":[[2013,9]]},"abstract":"<jats:p>This paper continues an investigation into bridging two research areas concerned with natural computing: membrane computing and reaction systems. More specifically, the paper considers a transfer of two assumptions\/axioms of reaction systems, non-permanency and the threshold assumption, into the framework of membrane computing. It is proved that: (1) spiking neural P systems with non-permanency of spikes assumption characterize the semilinear sets of numbers, and (2) symport\/antiport P systems with threshold assumption (translated as \u03c9 multiplicity of objects) can solve SAT in polynomial time. Also, several open research problems are stated.<\/jats:p>","DOI":"10.3233\/fi-2013-898","type":"journal-article","created":{"date-parts":[[2019,12,3]],"date-time":"2019-12-03T00:33:56Z","timestamp":1575333236000},"page":"99-114","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":4,"title":["Bridging Membrane and Reaction Systems \u2013 Further Results and Research Topics"],"prefix":"10.1177","volume":"127","author":[{"given":"Gheorghe","family":"P\u0103un","sequence":"first","affiliation":[{"name":"Institute of Mathematics of the Romanian Academy, PO Box 1-764, 014700 Bucharest, Romania. george.paun@imar.ro, gpaun@us.es"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mario J.","family":"P\u00e9rez-Jim\u00e9nez","sequence":"additional","affiliation":[{"name":"Research Group on Natural Computing, Department of Computer Science and AI, University of Sevilla, Avda Reina Mercedes s\/n, 41012 Sevilla, Spain. marper@us.es"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Grzegorz","family":"Rozenberg","sequence":"additional","affiliation":[{"name":"Leiden Institute for Advanced Computer Science - LIACS, Leiden University, Niels Bohrweg 1, 2333 CA Leiden, The Netherlands. rozenber@liacs.nl"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2013,1]]},"container-title":["Fundamenta Informaticae"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.3233\/FI-2013-898","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.3233\/FI-2013-898","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T06:30:45Z","timestamp":1777444245000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.3233\/FI-2013-898"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2013,1]]},"references-count":0,"journal-issue":{"issue":"1-4","published-print":{"date-parts":[[2013,9]]}},"alternative-id":["10.3233\/FI-2013-898"],"URL":"https:\/\/doi.org\/10.3233\/fi-2013-898","relation":{},"ISSN":["0169-2968","1875-8681"],"issn-type":[{"value":"0169-2968","type":"print"},{"value":"1875-8681","type":"electronic"}],"subject":[],"published":{"date-parts":[[2013,1]]}}}