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  <front>
    <journal-meta>
      <journal-id journal-id-type="publisher-id">109</journal-id>
      <journal-id journal-id-type="index">urn:lsid:arphahub.com:pub:3dc5f44e-8666-58db-bc76-a455210e8891</journal-id>
      <journal-title-group>
        <journal-title xml:lang="en">JUCS - Journal of Universal Computer Science</journal-title>
        <abbrev-journal-title xml:lang="en">jucs</abbrev-journal-title>
      </journal-title-group>
      <issn pub-type="ppub">0948-695X</issn>
      <issn pub-type="epub">0948-6968</issn>
      <publisher>
        <publisher-name>Journal of Universal Computer Science</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="doi">10.3217/jucs-005-02-0033</article-id>
      <article-id pub-id-type="publisher-id">27534</article-id>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Research Article</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>On the Power of Membrane Computing</article-title>
      </title-group>
      <contrib-group content-type="authors">
        <contrib contrib-type="author" corresp="yes">
          <name name-style="western">
            <surname>Dassow</surname>
            <given-names>Jürgen</given-names>
          </name>
          <email xlink:type="simple">dassow@iws.cs.uni-magdeburg.de</email>
          <xref ref-type="aff" rid="A1">1</xref>
        </contrib>
        <contrib contrib-type="author" corresp="no">
          <name name-style="western">
            <surname>Paun</surname>
            <given-names>Gheorghe</given-names>
          </name>
          <xref ref-type="aff" rid="A2">2</xref>
        </contrib>
      </contrib-group>
      <aff id="A1">
        <label>1</label>
        <addr-line content-type="verbatim">Otto-von-Guericke-Universität Magdeburg, Fakultät für Informatik, Magdeburg, Germany</addr-line>
        <institution>Otto-von-Guericke-Universität Magdeburg, Fakultät für Informatik</institution>
        <addr-line content-type="city">Magdeburg</addr-line>
        <country>Germany</country>
      </aff>
      <aff id="A2">
        <label>2</label>
        <addr-line content-type="verbatim">Institute of Mathematics of the Romanian Academy, Bucharest, Romania</addr-line>
        <institution>Institute of Mathematics of the Romanian Academy</institution>
        <addr-line content-type="city">Bucharest</addr-line>
        <country>Romania</country>
      </aff>
      <author-notes>
        <fn fn-type="corresp">
          <p>Corresponding author: Jürgen Dassow (<email xlink:type="simple">dassow@iws.cs.uni-magdeburg.de</email>).</p>
        </fn>
        <fn fn-type="edited-by">
          <p>Academic editor: </p>
        </fn>
      </author-notes>
      <pub-date pub-type="collection">
        <year>1999</year>
      </pub-date>
      <pub-date pub-type="epub">
        <day>28</day>
        <month>02</month>
        <year>1999</year>
      </pub-date>
      <volume>5</volume>
      <issue>2</issue>
      <fpage>33</fpage>
      <lpage>49</lpage>
      <uri content-type="arpha" xlink:href="http://openbiodiv.net/296E8E0A-5D7F-5362-9F87-A60CEFB288C3">296E8E0A-5D7F-5362-9F87-A60CEFB288C3</uri>
      <uri content-type="zenodo_dep_id" xlink:href="https://zenodo.org/record/6995642">6995642</uri>
      <permissions>
        <copyright-statement>Jürgen Dassow, Gheorghe Paun</copyright-statement>
        <license license-type="creative-commons-attribution" xlink:href="" xlink:type="simple">
          <license-p>This article is freely available under the J.UCS Open Content License.</license-p>
        </license>
      </permissions>
      <abstract>
        <label>Abstract</label>
        <p>We continue the investigation of the power of the computability models introduced in [12] under the name of transition super-cell systems. We compare these systems with classic mechanisms in formal language theory, context-free and matrix grammars, E0L and ET0L systems, interpreted as generating mechanisms of number relations (we take the Parikh image of the usual language generated by these mecha- nisms rather than the language). Several open problems are also formulated.</p>
      </abstract>
    </article-meta>
  </front>
</article>
