Rudolf Freund

Ao.Univ.Prof. Dipl.-Ing. Mag.rer.nat. Dr.techn.

Research Focus

Logic and Computation: 100%

Research Areas

Infinite Words, Array Grammars, Formal Languages, Graph Grammars, Neural Nets, Molecular Computing, Membrane Computing (P Systems)

Roles

Associate Professor
Theory and Logic, E192-05
Curriculum Coordinator
Bachelor Medical Informatics
Curriculum Coordinator
Master Medical Informatics
Faculty Council
Substitute Member
Curriculum Commission for Informatics
Principal Member
Curriculum Commission for Business Informatics
Substitute Member

Contact

Courses

2020W

Anatomy and Histology / 185.330 / VO
Bachelor Thesis for Informatics and Business Informatics / 185.A26 / PR
Evaluating courses with respect to learning outcomes / 192.113 / SE
Formal Language Theory / 185.A42 / VU
Introducrtion to Clinics / 185.329 / VO
Membrane Computing / 185.A70 / VU
Presentation and Moderation / 185.A62 / VU
Project in Computer Science 1 / 185.A36 / PR
Project in Computer Science 2 / 185.A37 / PR
Project in Medical Informatics / 185.A30 / PR
Project in Software Engineering & Internet Computing / 185.A38 / PR
Research Seminar for Master and PhD students / 185.A39 / SE
Seminar for Diplomands in Informatikdidaktik 2 / 192.096 / SE
Seminar for Master Students in Medical Informatics / 180.776 / SE
Seminar in Theoretical Computer Science / 192.074 / SE
Theoretical Computer Science and Logics / 185.278 / VU

2021S

Bachelor Thesis for Informatics and Business Informatics / 185.A26 / PR
Basics of physiology and pathology / 185.A47 / VO
Clinics / 185.334 / VO
Introduction to Theoretical Computer Science and Logics / 192.071 / VU
Legal Basics of Medical Health Care / 185.A57 / VO
Machine Learning for Health Informatics / 185.A83 / VU
Molecular Computing / 185.326 / VU
Principles for evaluating curricula / 192.117 / SE
Privatissimum on Didactics of Informatics / 192.100 / SE
Project in Computer Science 1 / 185.A36 / PR
Project in Computer Science 2 / 185.A37 / PR
Project in Medical Informatics / 185.A30 / PR
Research Seminar for Master and PhD students / 185.A39 / SE
Seminar for Master Students in Medical Informatics / 180.776 / SE

Publications

2020

Time-freeness and clock-freeness and related concepts in {P} systems / R. Freund, A. Alhazov et al. / Theoretical Computer Science, 805 (2020), 127 - 143
P systems with randomized right-hand sides of rules / R. Freund, A. Alhazov et al. / Theoretical Computer Science, 805 (2020), 805; 144 - 160

2019

Reversibility and Determinism in P Systems / R. Freund / Talk: Reversibility in Programming, Languages, and Automata (RPLA), Porto; 2019-10-07 - 2019-10-11
Tissue P Systems with Anti-Cells / R. Freund / Talk: 29. Theorietag Automaten und Formale Sprachen, Bremen; 2019-09-26
A Formal Framework for Spiking Neural P Systems / R. Freund, S. Verlan, A. Alhazov et al. / Talk: CMC20, Curtea de Arges, Romania; 2019-08-05 - 2019-08-08; in: "Proceedings of the 20th Intern. Conf. on Membrane Computing CMC20", Gh. Paun (ed.); Editura Bibliostar, Ramniciu Valcea (2019), ISBN: 978-606-8493-76-3; 523 - 536
Playing with Derivation Modes / R. Freund / Talk: CMC20, Curtea de Arges, Romania (invited); 2019-08-05 - 2019-08-08; in: "Proceedings of the 20th Intern. Conf. on Membrane Computing CMC20", Gh. Paun (ed.); (2019), ISBN: 978-606-8493-76-3; 109 - 123
P Systems with Anti-Membranes / R. Freund, A. Alhazov, S. Ivanov / Talk: CMC20, Curtea de Arges, Romania; 2019-08-05 - 2019-08-08; in: "Proceedings of the 20th Intern. Conf. on Membrane Computing CMC20", Gh. Paun (ed.); (2019), ISBN: 978-606-8493-76-3; 249 - 256
A General Framework for Sequential Grammars with Control Mechanisms / R. Freund / Talk: DCFS 2019, Kosice, Slovakia; 2019-07-17 - 2019-07-19; in: "Descriptional Complexity of Formal Systems - 21st IFIP WG 1.02 International Conference, DCFS2019 Proceedings", M. Hospodar et al. (ed.); LNCS 11612 (2019), ISBN: 978-3-030-23246-7; 1 - 34
Turing machines with activations of transitions / R. Freund, L. Staiger / Talk: NCMA 2019, Valencia; 2019-07-02 - 2019-07-03; in: "Eleventh Workshop on Non-Classical Models of Automata and Applications, NCMA", Österreichische Computer Gesellschaft, (2019), ISBN: 978-3-903035-25-6; 79 - 91
Register machines over groups / R. Freund, A. Alhazov, S. Ivanov / Talk: NCMA 2019, Valencia; 2019-07-02 - 2019-07-03; in: "Eleventh Workshop on Non-Classical Models of Automata and Applications, NCMA 2019", Österreichische Computer Gesellschaft, (2019), ISBN: 978-3-903035-25-6; 31 - 46
Blind and partially blind reister machines over groups / R. Freund, A. Alhazov et al. / Talk: NCMA 2019, Valencia; 2019-07-02 - 2019-07-03
Eleventh Workshop on Non-Classical Models of Automata and Applications, NCMA 2019, Valencia, Spain, July 2-3, 2019 / R. Freund, M Holzer et al. / OCG (Österreichische Computer Gesellschaft), Wien, 2019, ISBN: 978-3-903035-25-6; 204 pages
Variants of P systems with activation and blocking of rules / R. Freund, A. Alhazov, S. Ivanov / Natural Computing, 18 (2019), 3; 593 - 608
Variants of Networks of Evolutionary Processors with Polarizations and a Small Number of Processors / R. Freund, S. Verlan et al. / International Journal of Foundations of Computer Science, 30 (2019), 6-7; 1005 - 1027
Playing with Derivation Modes and Halting Conditions / R. Freund / in: "Proceedings of Seventeenth Brainstorming Week on Membrane Computing", Artes Gr a cas Moreno, S.L., Sevilla, 2019, 978-84-14347-4, 91 - 108
P Systems: from Anti-Matter to Anti-Rules / R. Freund / in: "Proceedings of Seventeenth Brainstorming Week on Membrane Computing", Artes Gr a cas Moreno, S.L., sevilla, 2019, 978-84-14347-4, 41 - 58
(Tissue) P Systems with Anti-Membranes / R. Freund et al. / in: "Proceedings of Seventeenth Brainstorming Week on Membrane Computing Sevilla, February 5-8, 2019", Artes Gr a cas Moreno, S.L., Sevilla, 2019, 978-84-14347-4, 29 - 40
Beyond Generalized Multiplicities: Register Machines over Groups / R. Freund, A. Alhazov, S. Ivanov / in: "Seventeenth Brainstorming Week on Membrane Computing Sevilla, February 5 - 8, 2019", Artes Gr a cas Moreno, S.L., 2019, 978-84-14347-4, 1 - 28
Tissue P Systems with Point Mutation Rules / R. Freund, A. Alhazov, S. Ivanov, S. Verlan / in: "Membrane Computing. 19th International Conference, CMC 2018", 11399; G. Rozenberg et al. (ed.); Springer International Publishing Switzerland, 2019, ISBN: 978-3-030-12796-1, 33 - 57

2018

Activation and Blocking of Rules / R. Freund, A. Alhazov, S. Ivanov / Talk: The 5th Annual Rogozhin Lectures on Foundations of Informatics and Unconventional Computing Systems, Chisinau, Moldavien; 2018-11-13 - 2018-11-14
Tissue P Systems with Point Mutation Rules / R. Freund et al. / Talk: CMC19, Dresden; 2018-09-04 - 2018-09-07; in: "Proceedings of the 19th International Conference on Membrane Computing", Friedrich Schiller University Jena, (2018), ISBN: 978-3-96409-030-0; 29 - 50
Sequential Grammars with Activation and Blocking of Rules / R. Freund et al. / Talk: MCU (International Conference Machines, Computations and Universality), Fontainebleau (invited); 2018-06-28 - 2018-06-30; in: "Machines, Computations, and Universality", S. Verlan et al. (ed.); Springer, LNCS 10881 (2018), ISBN: 978-3-319-92401-4; 51 - 68
Control Mechanisms for Array Grammars on Cayley Grids / R. Freund / Talk: MUC 2018, Fontainebleau (invited); 2018-06-28 - 2018-06-30; in: "Machines, Computations, and Universality", S. Verlan et al. (ed.); Springer, LNCS 10881 (2018), ISSN: 0302-9743; 1 - 33
P Systems with Activation and Blocking of Rules / R. Freund et al. / Talk: UCNC 2018, Fontainebleau; 2018-06-25 - 2018-06-29; in: "Unconventional Computation and Natural Computation", S. Verlan et al. (ed.); LNCS/Springer, LNCS 10867 (2018), ISBN: 978-3-319-92434-2; 1 - 15
Small Universal Reversible Counter Machines / R. Freund, A. Alhazov, S. Verlan / in: "Emergence, Complexity and Computation", 30; A. Adamatzky (ed.); Springer International Publishing, 2018, ISBN: 978-3-319-73216-9, 433 - 446
Chocolate P Automata / R. Freund, M. Oswald, A. Alhazov et al. / in: "Enjoying Natural Computing - Essays Dedicated to Mario de Jesus Perez-Jimenez on the Occasion of His 70th Birthday", 11270; Gh. Paun et al. (ed.); Springer International Publishing, LNCS, 2018, 1 - 20
Proceedings of the Workshop on Membrane Computing at UCNC 2018. / R. Freund, S. Ivanov / TU Wien, Wien, 2018, 71 pages
Proceedings of the Tenth Workshop on Non-Classical Models of Automata and Applications, (NCMA) / R. Freund / in series "Books@ocg.at", series editor: G Chroust et al.; OCG (Österreichische Computer Gesellschaft), Wien, 2018, ISBN: 978-3-903035-21-8, 215 pages
Tenth Workshop on Non-Classical Models of Automata and Applications - Short papers / R. Freund et al. / in series "Workshop on Non-Classical Models of Automata and Applications - Short papers", series editor: R. Freund et al.; TU Wien, Wien, 2018, 53 pages
Extended spiking neural P systems with white hole rules and their red-green variants / R. Freund, A. Alhazov, S. Ivanov, M. Oswald et al. / Natural Computing, 17 (2018), 2; 297 - 310
Hierarchical P systems with randomized right-hand sides of rules. / R. Freund, A. Alhazov et al. / in: "Membrane Computing: 18th International Conference, CMC 2017, Bradford, UK, July 25-28, 2017, Revised Selected Papers", 10725; M. Gheorghe et al. (ed.); Springer International Publishing, 2018, ISBN: 978-3-319-73358-6, 15 - 39
Introducing the Concept of Activation and Blocking of Rules in the General Framework for Regulated Rewriting in Sequential Grammars. / R. Freund, A. Alhazov, S. Ivanov / in: "Sixteenth Brainstorming Week on Membrane Computing", Gh. Paun et al. (ed.); Fénix Editora, Sevilla, 2018, 1 - 22
Input-Driven Tissue P Automata / R. Freund, M. Oswald, A. Alhazov et al. / in: "Sixteenth Brainstorming Week on Membrane Computing", Gh. Paun et al. (ed.); Fénix Editora, Sevilla, 2018, 39 - 58
One-Membrane P Systems with Activation and Blocking of Rules. / R. Freund, A. Alhazov, S. Ivanov / in: "Sixteenth Brainstorming Week on Membrane Computing", Gh. Paun et al. (ed.); Fénix Editora, Sevilla, 2018, 23 - 38
Unfair P Systems / R. Freund, A. Alhazov, S. Ivanov / in: "Proceedings of the Workshop on Membrane Computing at UCNC 2018. Fontainebleau, France June 25th, 2018", TU Wien, 2018, 63 - 71
Unfair P Systems / R. Freund, A. Alhazov, S. Ivanov / in: "Theorietage 2018, Wittenberg, Technical Report 18-1, Universität Halle-Wittenberg", K. Reinhardt (ed.); Universität Halle-Wittenberg, 2018, 87 - 90

2017

(Tissue) {P} Systems with Vesicles of Multisets / R. Freund et al. / Talk: Proceedings 15th International Conference on Automata and Formal Languages, {AFL} 2017, Debrecen, Hungary, Debrecen; 2017-09-04 - 2017-09-06; in: "Proceedings 15th International Conference on Automata and Formal Languages, {AFL} 2017, Debrecen, Hungary", corr, abs-1708-06226 (2017), 11 - 25
Computational Completeness of Networks of Evolutionary Processors with Elementary Polarizations and a Small Number of Processors / R. Freund et al. / Talk: Descriptional Complexity of Formal Systems - 19th {IFIP} {WG} 1.02 International Conference, {DCFS} 2017, Milano, Mailand; 2017-07-03 - 2017-07-05; in: "Descriptional Complexity of Formal Systems - 19th {IFIP} {WG} 1.02 International Conference, {DCFS} 2017, Milano, Italy, July 3-5, 2017, Proceedings}", Springer, 10316 (2017), ISBN: 978-3-319-60252-3; 140 - 151
Ninth Workshop on Non-Classical Models of Automata and Applications, {NCMA} 2017, Prague, Czech Republic / R. Freund et al. / in series "Workshop on Non-Classical Models of Automata and Applications", series editor: R. Freund; issued by: österreichische Computer Ges; Österreichische Computer Gesellschaft, 2017, ISBN: 978-3-903035-18-8
Contextual array grammars with matrix control, regular control languages, and tissue P systems control / R. Freund, A. Alhazov, S. Ivanov et al. / Theoretical Computer Science, 682 (2017), 5 - 21
Non-Isometric Contextual Array Grammars and the Role of Regular Control and Local Selectors / R. Freund, H. Fernau et al. / Fundamenta Informaticae, 155 (2017), 1-2; 209 - 232
Watson-Crick {T0L} Systems and Red-Green Register Machines / R. Freund et al. / Fundamenta Informaticae, 155 (2017), 1-2; 111 - 129
P Systems Working in Maximal Variants of the Set Derivation Mode / R. Freund, A. Alhazov, S. Verlan et al. / in: "International Conference on Membrane Computing 2016", 10105; G. Rozenberg et al. (ed.); issued by: Springer; Springer LNCS, 2017, ISBN: 978-3-319-54071-9, 83 - 102
Simulating R Systems by P Systems / R. Freund, S. Ivanov, A. Alhazov et al. / in: "International Conference on Membrane Computing 2016", 10105; Springer LNCS, 2017, ISBN: 978-3-319-54071-9, 51 - 66
Purely Catalytic P Systems over Integers and Their Generative Power / R. Freund, A. Alhazov, S. Ivanov et al. / in: "International Conference on Membrane Computing 2016", 10105; G. Rozenberg et al. (ed.); issued by: Springer; Springer LNCS, 2017, ISBN: 978-3-319-54071-9, 67 - 82
P Systems with Random RHS Exchange / R. Freund et al. / in: "Conference on Mathematical Foundations of Informatics, 2017, Chişinău: Proceedings MFOI, 2017", Acad. of Sciences of Moldova, 2017, 27 - 30
P Systems and the Concept of Fairness / R. Freund, A. Alhazov, S. Ivanov / in: "Conference on Mathematical Foundations of Informatics, 2017, Chişinău: Proceedings MFOI, 2017", Acad. of Sciences of Moldova, 2017, 978‐9975‐4237‐6‐2, 11 - 26
Sequential Polarized Tissue P Systems with Vesicles of Multisets / R. Freund, A. Alhazov, S. Verlan et al. / in: "Conference on Mathematical Foundations of Informatics, 2017, Chişinău: Proceedings MFOI, 2017", Acad. of Sciences of Moldova, 2017, 978‐9975‐4237‐6‐2, 7 - 10
Time-freeness and Clock-freeness and Related Concepts in P Systems. / R. Freund, A. Alhazov et al. / in: "Proceedings of BWMC 2017: 15th Brainstorming Week on Membrane Computing (2017), Sevilla", Gh. Paun et al. (ed.); Fénix Editora, 2017, ISBN: 978-84-946316-9-6, 43 - 70
P Systems with Randomized Right-hand Sides of Rules / R. Freund, A. Alhazov, S. Ivanov / in: "Proceedings of BWMC 2017: 15th Brainstorming Week on Membrane Computing (2017), Sevilla", Gh. Paun et al. (ed.); Fénix Editora, 2017, ISBN: 978-84-946316-9-6, 13 - 42
Unfair P Systems / R. Freund, A. Alhazov, S. Ivanov / in: "Proceedings of BWMC 2017: 15th Brainstorming Week on Membrane Computing (2017), Sevilla", Gh. Paun et al. (ed.); Fénix Editora, 2017, ISBN: 978-84-946316-9-6, 1 - 12
Transitional P Systems with Randomized Rule Right-hand Sides. / R. Freund, A. Alhazov, S. Ivanov / in: "Preproceedings of the 18th Conference on Membrane Computing, CMC18, Bradford", M. Gheorghe et al. (ed.); IMCS, Bradford, 2017, 23 - 47

2016

Variants of Energy-Controlled P Systems" Autoren / R. Freund et al. / Talk: Workshop "Unconventional Computing Systems" in commemoration of Yuri Rogozhin, Chisinau; 2016-11-11
Variants of Energy-Controlled P Systems / R. Freund / Talk: NIT 2016, Valencia; 2016-10-18 - 2016-10-21
Red-Green P Automata / R. Freund / Talk: 26.Theorietag Automata und Formale Sprachen, Tannenfelde; 2016-10-04 - 2016-10-07
Simulating R Systems by P Systems / R. Freund et al. / Talk: 17th International Conference on Membrane Computing (CMC17), Mailand; 2016-07-25 - 2016-07-29; in: "Proceedings of 17th International Conference on Membrane Computing (CMC17)", (2016), 13 - 26
Maximal Variants of the Set Derivation Mode / R. Freund et al. / Talk: 17th International Conference on Membrane Computing (CMC17), Mailand; 2016-07-25 - 2016-07-29; in: "Proceedings of 17th International Conference on Membrane Computing (CMC17)", (2016), 57 - 72
Semilinear Sets, Register Machines, and Integer Vector Addition (P) Systems / R. Freund et al. / Talk: 17th International Conference on Membrane Computing (CMC17), Mailand; 2016-07-25 - 2016-07-29; in: "Proceedings of 17th International Conference on Membrane Computing (CMC17)", (2016), 39 - 56
Purely Catalytic P Systems over Integers and Their Generative Power / R. Freund et al. / Talk: 17th International Conference on Membrane Computing (CMC17), Mailand; 2016-07-25 - 2016-07-29; in: "Proceccings of 17th International Conference on Membrane Computing (CMC17)", (2016), 27 - 38
Computations on a Moebius Rope / R. Freund / Talk: 17th International Conference on Membrane Computing (CMC17), Mailand; 2016-07-25 - 2016-07-29
P Systems Working in Set Modes / R. Freund / Talk: Unconventional Computation and Natural Computation UCNC 2016, Manchester (invited); 2016-07-11 - 2016-07-15; in: "Unconventional Computation and Natural Computation 15th International Conference, UCNC 2016, Manchester, UK, July 11-15, 2016, Proceedings", LNCS/Springer, 9726 (2016), ISBN: 978-3-319-41312-9; 4 - 15
Extended Spiking Neural P Systems with States / R. Freund, A. Alhazov, S. Ivanov / Talk: Unconventional Computation and Natural Computation UCNC 2016, Manchester; 2016-07-11 - 2016-07-15; in: "Unconventional Computation and Natural Computation", LNCS/Springer, 9726 (2016), ISBN: 978-3-319-41312-9; 42 - 54
Contextual Array Grammars with Matrix and Regular Control / R. Freund, H. Fernau et al. / Talk: DCFS 2016, Bucharest; 2016-07-05 - 2016-07-08; in: "Descriptional Complexity of Formal Systems - 18th {IFIP} {WG} 1.2 International Conference", (2016), ISBN: 978-3319411132; 98 - 110
Models of Grammars Inspired by Marcus Contextual Grammars / R. Freund / Talk: DCFS 2016, Bucharest; 2016-07-05 - 2016-07-08
Eighth Workshop on Non-Classical Models of Automata and Applications (NCMA 2016) / R. Freund, H. Bordihn et al. / OCG (Österreichische Computer Gesellschaft), Wien, 2016, ISBN: 978-3-903035-10-2; 300 pages
Preface / R. Freund et al. / Fundamenta Informaticae, 148 (2016), 3-4
Going Beyond Turing with {P} Automata: Regular Observer {\(\omega\)}-Languages and Partial Adult Halting / R. Freund, L. Staiger, S. Ivanov / International Journal of Unconventional Computing, 12 (2016), 1; 51 - 69
Computational completeness of complete, star-like, and linear hybrid networks of evolutionary processors with a small number of processors / R. Freund, A. Alhazov et al. / Natural Computing, 15 (2016), 1; 51 - 68
P Automata: New ideas and results / R. Freund / in: "Proceedings of Eighth Workshop on Non-Classical Models of Automata and Applications", 321; Austrian Computer Society, 2016, ISBN: 978-3-903035-10-2, 13 - 40

2015

Going Beyond Turing with Extended Spiking Neural P Systems with White Hole Rules / R. Freund, M. Oswald et al. / Talk: Ucnc2015 (wmc2015), Auckland, New Zealand; 2015-08-30 - 2015-09-03; in: "Proceedings of the Workshop on Membrane Computing 2015 (WMC2015)", M. Dinneen (ed.); (2015), 17 - 32
Solving SAT with Antimatter in Membrane Computing / R. Freund et al. / Talk: Ucnc2015 (wmc2015), Auckland, New Zealand; 2015-08-30 - 2015-09-03; in: "CDMTCS Research Report Series Proceedings of the Workshop on Membrane Computing 2015 (WMC2015)", M. Dinneen (ed.); (2015), 48 - 58
Small Catalytic P Systems / R. Freund et al. / Talk: Ucnc2015 (wmc2015), Auckland, New Zealand; 2015-08-30 - 2015-09-03; in: "Proceedings of the Workshop on Membrane Computing 2015 (WMC2015)", M. Dinneen (ed.); (2015), 1 - 16
Going Beyond Turing with P Automata: Partial Adult Halting and Regular Ovserver Languages / R. Freund, L. Staiger et al. / Talk: UCNC 2015, Auckland; 2015-08-30 - 2015-09-03; in: "Unconventional Computation and Natural Computation", C. Calude et al. (ed.); LNCS/Springer, 9252 (2015), ISBN: 978-3-319-21818-2; 169 - 181
Going Beyond Turing with Watson-Crick T0L Systems / R. Freund et al. / Poster: UCNC 2015, Auckland; 2015-08-30 - 2015-09-03
Computational Completeness and Universality in Membrane Computing / R. Freund / Keynote Lecture: CMC'16 Membrane Computing, Valencia; 2015-08-17 - 2015-08-21
Variants of P Systems with Toxic Objects / R. Freund et al. / Talk: CMC'16 Membrane Computing, Valencia; 2015-08-17 - 2015-08-21; in: "Proceedings of the 16th International Conference on Membrane Computing, {CMC} 2015", J. Sempere et al. (ed.); (2015), 23 - 49
P Systems with Generalized Multisets Over Totally Ordered Abelian Groups / R. Freund et al. / Talk: CMC'16 Membrane Computing, Valencia; 2015-08-17 - 2015-08-21; in: "Membrane Computing - 16th International Conference, {CMC} 2015, Valencia, Spain, August 17-21, 2015, Revised Selected Papers", J. Sempere et al. (ed.); (2015), 101 - 121
New Results for Small Universal P Systems Based on the Simulation of Generalized Register Machines and Generalized Counter Automata / R. Freund, A. Alhazov / Talk: CMC'16 Membrane Computing, Valencia; 2015-08-17 - 2015-08-21
The Set-Maximally Parallel Derivation Mode / R. Freund, S. Verlan / Talk: CMC'16 Membrane Computing, Valencia; 2015-08-17 - 2015-08-21
P Systems with Multiple Catalysts of the Same Name / R. Freund, S. Ivanov / Talk: CMC'16 Membrane Computing, Valencia; 2015-08-17 - 2015-08-21
How to Go Beyond Turing with P Automata: Time Travels, Regular Observer w-Languages, and Partial Adult Halting / R. Freund, S. Ivanov et al. / Talk: BWMC 2015, Sevilla; 2015-02-02 - 2015-02-06; in: "Proceedings of the Thirteenth Brainstorming Week on Membrane Computing", Gh. Paun et al. (ed.); Fenix Editora, (2015), 143 - 158
On The Semantics of Annihilation Rules in Membrane Computing / R. Freund et al. / Talk: BWMC 2015, Sevilla; 2015-02-02 - 2015-02-06; in: "Proceedings of the Thirteenth Brainstorming Week on Membrane Computing", Gh. Paun et al. (ed.); Fenix Editora, (2015), 131 - 142
Extended Spiking Neural P Systems with White Hole Rules / R. Freund, M. Oswald, A. Alhazov et al. / Talk: BWMC 2015, Sevilla; 2015-02-02 - 2015-02-06; in: "Proceedings of the Thirteenth Brainstorming Week on Membrane Computing", Gh. Paun et al. (ed.); Fenix Editora, (2015), 45 - 62
Variants of P Systems with Toxic Objects / R. Freund, A. Alhazov et al. / Talk: BWMC 2015, Sevilla; 2015-02-02 - 2015-02-06; in: "Proceedings of the Thirteenth Brainstorming Week on Membrane Computing", Gh. Paun et al. (ed.); Fenix Editora, (2015), 19 - 44
Polarizationless P Systems with One Active Membrane / R. Freund, A. Alhazov / Talk: BWMC 2015, Sevilla; 2015-02-02 - 2015-02-06; in: "Proceedings of the Thirteenth Brainstorming Week on Membrane Computing", Gh. Paun et al. (ed.); Fenix Editora, (2015), 9 - 18
Deterministic Non-cooperative P Systems with Strong Context Conditions / R. Freund, A. Alhazov / Talk: BWMC 2015, Sevilla; 2015-02-02 - 2015-02-06; in: "Proceedings of the Thirteenth Brainstorming Week on Membrane Computing", Gh. Paun et al. (ed.); Fenix Editora, (2015), 1 - 8
SUBRAMANIAN, Regulated Contextual Array Grammars / R. Freund et al. / in: "Annals of the University of Bucharest Informatics Series", 3; Editura Universitatii di Bucuresti, 2015, ISSN: 2067-9009, 63 - 79
Algebraic Representation of Regular Array Languages on Cayley Graphs / R. Freund, M. Oswald et al. / in: "Discrete Mathematics and Computer Science", Gh. Paun et al. (ed.); Editura Academiei Romane, 2015, 165 - 189
Small P Systems Defining Non-semilinear Sets / R. Freund, A. Alhazov / in: "Automata, Universality, Computation", A. Adamatzky (ed.); Springer International Publishing, Heidelberg, 2015, ISSN: 2194-7287, 183 - 219
Seventh Workshop on Non-Classical Models of Automata and Applications / R. Freund et al. / OCG (Österreichische Computer Gesellschaft), Wien, 2015, ISBN: 978-3-903035-07-2; 206 pages
The Finite Index Restriction Meets Hybrid Modes in Cooperating Distributed Grammar Systems / R. Freund, H. Fernau et al. / International Journal of Foundations of Computer Science, 26 (2015), 8; 1167 - 1188
Variants of Small Universal {P} Systems with Catalysts / R. Freund, A. Alhazov / Fundamenta Informaticae, 138 (2015), 1-2; 227 - 250
Catalytic and Purely Catalytic {P} Systems and {P} Automata: Control Mechanisms for Obtaining Computational Completeness / R. Freund, M. Oswald, Gh. Paun / Fundamenta Informaticae, 136 (2015), 1-2; 59 - 84
Contextual array grammars and array {P} systems / R. Freund, H. Fernau et al. / Annals of Mathematics and Artificial Intelligence, 75 (2015), 1-2; 5 - 26
A Connection Between Red-Green Turing Machines and Watson-Crick {T0L} Systems / R. Freund et al. / in: "Machines, Computations, and Universality - 7th International Conference", 9288; J. Durand-Lose et al. (ed.); issued by: LNCS; Springer International Publishing, 2015, ISBN: 9783319231105, 31 - 44
Non-isometric Contextual Array Grammars with Regular Control and Local Selectors / R. Freund et al. / in: "Machines, Computations, and Universality: 7th International Conference, MCU 2015, Famagusta, North Cyprus, September 9-11, 2015, Proceedings", 9288; J. Durand-Lose et al. (ed.); Springer LNCS, 2015, ISBN: 3319231103, 61 - 78

2014

P Systems with Anti-Matter / R. Freund, A. Alhazov et al. / Talk: Theorietag Automaten und Formale Sprachen, Caputh; 2014-09-23 - 2014-09-25; in: "24.Theorietag "Automaten und Formale Sprachen"", H. Bordihn et al. (ed.); Universität Potsdam, (2014), ISSN: 0946-7580; 19 - 23
Red-Green P Automata / R. Freund et al. / Talk: CMC-14, Prag; 2014-08-20 - 2014-08-22; in: "Membrane Computing - 15th International Conference, CMC 2014", M. Gheorghe et al. (ed.); 8961 (2014), ISSN: 0302-9743; 139 - 157
Promoters and Inhibitors in Purely Catalytic {P} Systems / R. Freund, S. Verlan, A. Alhazov / Talk: CMC15, Prag; 2014-08-20 - 2014-08-22; in: "Membrane Computing - 15th International Conference, CMC 2014", M. Gheorghe et al. (ed.); 8961 (2014), ISBN: 978-3-319-14370-5; 126 - 138
P Systems with Toxic Objects / R. Freund, A. Alhazov / Talk: CMC15, Prag; 2014-08-20 - 2014-08-22; in: "Membrane Computing - 15th International Conference, CMC 2014", M. Gheorghe et al. (ed.); 8961 (2014), ISBN: 978-3-319-14370-5; 99 - 125
Priorities, Promoters and Inhibitors in Deterministic Non-cooperative P Systems / R. Freund, A. Alhazov / Talk: CMC15, Prag; 2014-08-20 - 2014-08-22; in: "Membrane Computing - 15th International Conference, CMC 2014", M. Gheorghe et al. (ed.); 8961 (2014), ISBN: 978-3-319-14370-5; 86 - 98
P Systems with Anti-Matter / R. Freund, A. Alhazov et al. / Talk: CMC 14, Prag; 2014-08-20 - 2014-08-22; in: "Membrane Computing - 15th International Conference, CMC 2014", M. Gheorghe, G. Rozenberg et al. (ed.); (2014), ISBN: 978-3-319-14370-5; 66 - 85
Five Nodes Are Sufficient for Hybrid Networks of Evolutionary Processors to Be Computationally Complete / R. Freund, A. Alhazov, Y. Rogozhin / Talk: UCNC, London; 2014-07-14 - 2014-07-18; in: "Unconventional Computation and Natural Computation - 13th International Conference, UCNC 2014, London, ON, Canada, July 14-18, 2014, Proc", O.H. Ibarra et al. (ed.); LNCS/Springer, 8553 (2014), ISBN: 978-3-319-08122-9; 1 - 13
Variants of P Automata / R. Freund / Keynote Lecture: Tenth Conference on Computability in Europe, CiE 2014 New Computing Paradigms - Workshop, Budapest; 2014-06-23 - 2014-06-27; in: "New Computing Paradigms - Workshop", (2014), ISBN: 978-3-319-08019-2; 7 pages
P Systems with Matter and Anti-Matter / R. Freund, Gh. Paun, A. Alhazov et al. / Talk: Tenth Conference on Computability in Europe, CiE 2014 New Computing Paradigms - Workshop, Budapest; 2014-06-23 - 2014-06-27; in: "Tenth Conference on Computability in Europe, CiE 2014 Language, Life, Limits", A. Beckmann et al. (ed.); (2014), 1 pages
Cooperating Distributed Grammar Systems of Finite Index Working in Hybrid Modes / R. Freund, H. Fernau, M Holzer / Talk: 14th International Conference on Automata and Formal Languages, AFL 2014, Hungary, May 27-29, 2014., Szeged; 2014-05-27 - 2014-05-29; in: "Proceedings 14th International Conference on Automata and Formal Languages, AFL 2014, Szeged, Hungary, May 27-29, 2014.", Z. Esik et al. (ed.); EPTCS, 151 (2014), ISSN: 2075-2180; 246 - 260
P Systems with Anti-Matter / R. Freund, Gh. Paun / Talk: 12th Brainstorming Week on Membrane Computing, Sevilla; 2014-02-03 - 2014-02-07; in: "12th Brainstorming Week on membrane Computing - Proceedings", Gh. Paun et al. (ed.); Fenix Editora, (2014), ISBN: 978-84-940056-4-0; 169 - 183
Red-Green P Automata / R. Freund, E. Csuhaj-Varjú et al. / Talk: 12th Brainstorming Week on Membrane Computing, Sevilla; 2014-02-03 - 2014-02-07; in: "12th Brainstorming Week on membrane Computing - Proceedings", Fenix Editora, (2014), ISBN: 978-84-940056-4-0; 73 - 79
Length P Systems with a Lone Traveler / R. Freund, A. Alhazov et al. / Talk: 12th Brainstorming Week on Membrane Computing, Sevilla; 2014-02-03 - 2014-02-07; in: "12th Brainstorming Week on membrane Computing - Proceedings", Gh. Paun et al. (ed.); Fenix Editora, (2014), ISBN: 978-84-940056-4-0; 37 - 49
Priorities, Promoters and Inhibitors in Deterministic Non-Cooperative P Systems / R. Freund, A. Alhazov / Talk: 12th Brainstorming Week on Membrane Computing, Sevilla; 2014-02-03 - 2014-02-07; in: "12th Brainstorming Week on membrane Computing - Proceedings", Gh. Paun et al. (ed.); Fenix Editora, (2014), ISBN: 978-84-940056-4-0; 27 - 37
Matter and Anti-Matter in Membrane Systems / R. Freund et al. / Talk: 12th Brainstorming Week on Membrane Computing, Sevilla; 2014-02-03 - 2014-02-07; in: "12th Brainstorming Week on membrane Computing - Proceedings", Gh. Paun et al. (ed.); Fenix Editora, (2014), ISBN: 978-84-940056-4-0; 1 - 27
Small P Systems Defining Non-semilinear Sets / R. Freund, A. Alhazov / in: "Automata, Computation, Universality", A. Adamatzky (ed.); Springer International Publishing, Heidelberg, 2014, ISBN: 978-3-319-09039-9, 183 - 217
Generating and accepting P systems with minimal left and right insertion and deletion / R. Freund, Y. Rogozhin, S. Verlan / in: "Natural Computing - An international Journal", J. Ferrandez et al. (ed.); Springer, 2014, ISSN: 1567-7818, 257 - 268
Array Grammars and Automata on Cayley Grids / R. Freund, M. Oswald / Journal of Automata, Languages and Combinatorics, 19 (2014), 1-4; 67 - 80
Antimatter as a Frontier of Tractability in Membrane Computing / R. Freund, A. Alhazov et al. / Fundamenta Informaticae, 134 (2014), 1-2; 83 - 96
Length P Systems / R. Freund, A. Alhazov et al. / Fundamenta Informaticae, 134 (2014), 1-2; 17 - 37
Report on UCNC 2014 / R. Freund, T. Hava et al. / Bulletin of the EATCS, 114 (2014)

2013

Eine natürliche Membranhierachie / R. Freund, H. Fernau et al. / Talk: Theorietag Automaten und Formale Sprachen, Ilmenau; 2013-09-25 - 2013-09-27; in: "Automaten und Formale Sprachen", (2013), 49 - 52
Array insertion and deletion P systems / R. Freund, H. Fernau, M. Oswald et al. / Talk: Theorietag Automaten und Formale Sprachen, Ilmenau; 2013-09-25 - 2013-09-27; in: "Automaten und Formale Sprachen", (2013), 46 - 49
How to Obtain Computational Completeness in P Systems with One Catalyst / R. Freund, Gh. Paun / Talk: MCU 2013, Zürich; 2013-09-09 - 2013-09-12; in: "Proceedings Machines, Computations and Universality 2013, MCU 2013, Zuerich, Switzerland, September 9-11, 2013", T. Neary et al. (ed.); (2013), 15
Flattening in (tissue) P systems / R. Freund, S. Verlan et al. / Talk: CMC 14, Chisinau; 2013-08-20 - 2013-08-23; in: "Membrane Computing. 14th international conference, CMC 2013", A. Alhazov (ed.); LNCS/Springer, 8340 (2014), ISBN: 978-3-642-54239-8; 173 - 188
Computational Completeness withe Generationg and Accepting P Systems Using Minimal Left and Right Insertion and Deletion / R. Freund, S. Verlan et al. / Talk: CMC 14, Chisinau; 2013-08-20 - 2013-08-23; in: "The 14th International Conferense on Membrane Computing, CMC 14, Chisinau, Moldova", A. Alhazov et al. (ed.); Chisinau (2013), ISBN: 978-3-642-40536-5; 321 - 325
Control Mechnisms for Obtaining Comutational Completeness / R. Freund, M. Oswald, Gh. Paun / Talk: CMC 14, Chisinau; 2013-08-20 - 2013-08-23; in: "Proceedings of The 14th International Conferense on Membrane Computing, CMC 14, Chisinau, Moldova", Chisinau (2013), ISBN: 978-9975-4237-2-4; 317 - 321
Undecidability and Computational Completeness for P Systems with One- and Two- dimensional Array Insertion and Deletion Rules / R. Freund, H. Fernau, M. Oswald et al. / Talk: CMC 14, Chisinau; 2013-08-20 - 2013-08-23; in: "The 14th International Conferense on Membrane Computing, CMC 14, Chisinau, Moldova", A. Alhazov et al. (ed.); Chisinau (2013), ISBN: 978-9975-4237-2-4; 309 - 313
Two Catalysts Can Be Sufficent for Computational Completeness / R. Freund / Talk: CMC 14, Chisinau; 2013-08-20 - 2013-08-23; in: "The 14th International Conferense on Membrane Computing, CMC 14, Chisinau, Moldova", A. Alhazov et al. (ed.); Chisinau (2013), ISBN: 978-9975-4237-2-4; 153 - 167
Catalytic and purely catalytic P automata: control mechanisms for obtaining computational completeness / R. Freund, M. Oswald / Talk: 5th Workshop on Non-Classical Models of Automata and Applications (NCMA), Umea; 2013-08-13 - 2013-08-14; in: "Proceedings of the 5th Workshop on Non-Classical Models of Automata and Applications (NCMA)", S. Bensch, R. Freund et al. (ed.); Wien (2013), ISBN: 978-3-85403-294-6; 133 - 150
Array Insertion and Deletion P Systems / R. Freund, H. Fernau et al. / Talk: Unconventional Computation & Natural Computation 2013, Mailand; 2013-05-01 - 2013-05-05; in: "12th International Conference, UCNC 2013, Milan, Italy, July 1-5, 2013. Proceedings", G. Mauri, A. Dennunzio et al. (ed.); Heidelberg (2013), ISBN: 978-3-642-39073-9; 67 - 78
Universal P Systems: One Catalyst Can Be Sufficient / R. Freund, Gh. Paun / Keynote Lecture: Brainstorming Week on Membrane Computing, Sevilla; 2013-02-04 - 2013-02-08; in: "Proceedings of Eleventh Brainstorming Week on Membrane Computing", Gh. Paun, L. Valencia-Cabrera et al. (ed.); Fenix Editora, Sevilla (2013), ISBN: 978-84-940691-9-2; 81 - 97
Vermittlung informatischer Kompetenzen und Medienkompetenzen in allen Lehramtstudien aller Ausbildungsinstitute Österreichs / A. Bachinger, G. Brandhofer, K Fuchs, G. Futschek, R. Freund, S. Gabriel, R. Goebl, W. Grossmann, P. Micheuz, E. Neuwirth, C. Nosko, M. Schedler, P. Traxler, D. Wohlhart / in: "Digitale Schule Österreich", issued by: Peter Micheuz, Anton Reiter, Gerhard Brandhofer, Martin Ebner, Barbara Sabitzer; books@ocg.at, Österreichische Computer Gesellschaft, 2013, ISBN: 9783854032977, 67 - 70
A formalization of membrane szstems with dynamically evolving structures / R. Freund, S. Verlan et al. / International Journal of Computer Mathematics, 90 (2013), 4; 801 - 815
Asynchronous and maximally parallel deterministic controlled non-cooperative P systems characterize NFIN and coNFIN / R. Freund, A. Alhazov / in: "Membrane computing. 13th international conference, CMC 2012, Budapest, Hungary, August 28--31, 2012", M. Gheorghe et al. (ed.); Springer LNCS, Heidelberg, 2013, ISBN: 978-3-642-36750-2, 101 - 111
Sequential P systems with regular control / R. Freund, M. Oswald, A. Alhazov et al. / in: "Membrane computing. 13th international conference, CMC 2012, Budapest, Hungary, August 28--31, 2012.", M. Gheorghe et al. (ed.); Springer LNCS, Heidelberg, 2013, ISBN: 978-3-642-36750-2, 112 - 127

2012

(Tissue) P Systems with Decaying Objects / R. Freund / Keynote Lecture: CMC'2012, Budapest; 2012-08-28 - 2012-08-31; in: "Proceedings of 13th Int.Conference of Membrane Computing", E. Csuhaj-Varjú et al. (ed.); LNCS 7762 (2012), ISBN: 978-3-642-36750-2; 1 - 26
Language Operators for Multiset languages and Modal Logic / R. Freund, M. Kudlek, N. Flick / Talk: NCMA, Fribourg, Schweiz; 2012-08-23 - 2012-08-24
Rechnen mit Molekülen / R. Freund, M. Freund / Talk: Institutskolloquium des Instituts für Informatik, Halle an der Saale; 2012-07-06
Membrane Systems With Membrane Labels Changing in Time / R. Freund, A. Alhazov et al. / Talk: 10th Brainstoming Week on Membrane Computing, Sevilla; 2012-01-30 - 2012-02-03
Sequential and maximally parallel multiset rewriting: reversiblility and determinism / R. Freund, A. Alhazov, K. Morita / Natural Computing, 11 (2012), 1; 95 - 106
P Systems with Minimal Left and Right Insertion and Deletion / R. Freund, Y. Rogozhin, S. Verlan / in: "11th Int. Conference on Unconventional Computation and Natural Computation", J. Durand-Lose et al. (ed.); Springer LNCS, Heidelberg, 2012, ISBN: 978-3-642-32893-0, 82 - 93
P Systems with Minimal Left and Right Insertion and Deletion / R. Freund, S. Verlan et al. / in: "Tenth Brainstorming Week on Membrane Computing", M. Martinez et al. (ed.); Fénix Editora, Sevilla, 2012, ISBN: 978-84-940056-5-7, 123 - 136
A formal framework for P systems with Dynamic Structure / R. Freund, S. Verlan et al. / in: "13th International Conference on Membrane Computing", E. Csuhaj-Varjú et al. (ed.); MTA Sztaki, Budapest, 2012, ISBN: 978-963-311-372-1, 199 - 210
Time-varying sequential P systems / R. Freund, M. Oswald, S. Verlan et al. / in: "13th International Conference on Membrane Computing", E. Csuhaj-Varjú et al. (ed.); MTA Sztaki, Budapest, 2012, ISBN: 978-963-311-372-1, 99 - 114
Asynchronous and Maximally Parallel Deterministic Controlled Non-Cooperative P Systems Characterize NFIN / R. Freund, A. Alhazov / in: "13th International Conference on Membrane Computing", E. Csuhaj-Varjú et al. (ed.); MTA Sztaki, Budapest, 2012, ISBN: 978-963-311-372-1, 87 - 98
Asynchronous and Maximally Parallel Deterministic Controlled Non-Cooperative P Systems Characterize NFIN / R. Freund, A. Alhazov / in: "Tenth Brainstorming Week on Membrane Computing", M. Martinez, Gh. Paun et al. (ed.); Fénix Editora, Sevilla, 2012, ISBN: 978-84-940056-5-7, 25 - 34
A formal framework for P systems with Dynamic Structure / R. Freund, S. Verlan et al. / in: "Tenth Brainstorming Week on Membrane Computing", M. Martinez et al. (ed.); Fénix Editora, Sevilla, 2012, ISBN: 978-84-940056-5-7, 111 - 122
Self-Stabilization in Membrane Systems / R. Freund et al. / in: "Tenth Brainstorming Week on Membrane Computing", Gh. Paun, A. Paun et al. (ed.); Fénix Editora, Sevilla, 2012, ISBN: 978-84-940056-5-7, 1 - 10

2011

A General Framework for Regulated Rewriting Based on the Applicability of Rules / R. Freund, M. Kogler, M. Oswald / Talk: Workshop on Computation, Cooperation, and Life, Otava, Teschechien; 2011-04-26 - 2011-04-27
Bildung 2.0 / R. Freund, R. Taschner / in: "Best Spirit: Best Practice", Braumüller, Wien, 2011, (invited), ISBN: 978-3-7003-1805-7, 109 - 113
Third Workshop on Non-Classical Models for Automata and Applications - NCMA 2011 / R. Freund, M Holzer et al. / Austrian Computer Society, 2011, ISBN: 978-3-85403-282-3
International Journal of Foundations of Comuter Science / R. Freund, M. Gheorghe et al. / in series "Special Issue: Natural Computing: Theory and Applications", series editor: O. Ibarra; World Scientific Publishing Co. Pte. Ltd., New Jersey, 2011
(Tissue) P systems working in the k - restricted minimally or maximally parallel transition mode / R. Freund, S. Verlan / Natural Computing, 10 (2011), 2; 821 - 833
Preface / R. Freund, M. Gheorghe et al. / International Journal of Foundations of Computer Science, 22 (2011), 1; 1 - 6
A General Framework for Regulated Rewriting Based on the Applicability of Rules / R. Freund, M. Kogler, M. Oswald / in: "Computation, Cooperation, and Life - Essays Dedicated to Gheorghe Paun on the Occasion of His 60th Birthday", J Kelemen, A. Kelemenova (ed.); Springer LNCS, 2011, ISBN: 978-3-642-19999-8, 35 - 53
A General Framework for Regulated Rewriting / R. Freund / in: "21.Theorietag - Automaten und Formale Sprachen", J. Dassow, B. Truthe (ed.); Otto von Guericke Universität Magdeburg, Fakultät für Informatik, 2011, 37 - 41

2010

Catalytic P Systems / R. Freund, A. Paun et al. / in: "The Oxford Handbook of Membrane Computing", Gh. Paun, G. Rozenberg, A. Salomaa (ed.); Oxford University Press, 2010, ISBN: 978-0-19-955667-0, 83 - 118
Second Workshop on Non-Classical Models for Automata and Applications (NCMA 2010) / H. Bordihn, R. Freund et al. / in series "Books@ocg.at", series editor: G Chroust, G. Kotis et al.; Österreichische Computer Gesellschaft, 2010, ISBN: 978-3-85403-263-2
Computationally Complete Spiking Neural P Systems without Delay: Two Types of Neurons Are Enough / R. Freund, M. Kogler / in: "11th International Conference, CMC2010 - Membrane Computing", M. Gheorghe, Gh. Paun et al. (ed.); issued by: LNCS; Springer LNCS, Heidelberg, 2010, ISBN: 3-642-18122-8, 198 - 208
Computationally Complete Spiking Neural P Systems without Delay: Two Types of Neurons Are Enough / R. Freund, M. Kogler / in: "Proceedings of the Eleventh International Conference on Membrane Computing", Pro Business GmbH, 2010, ISBN: 978-3-86805-721-8, 193 - 205

2009

P Automata with controlled use of minimal Communication rules / R. Freund, M. Kogler, S. Verlan / Talk: NCMA, Wroclaw; 2009-08-31 - 2009-09-01; in: "Workshop on Non-Classical Models for Automata and Applications", H. Bordihn, R. Freund, M Holzer et al. (ed.); Österreichische Computer Ges., Wien (2009), ISBN: 978-3-85403-256-4; 107 - 121
Simulating the behaviour of cellular automata by extended spiking neural P systems. / A. Binder, R. Freund, M. Oswald / Talk: Intern. Symp. on Artificial Life and Robotics (AROB), Beppu, Japan; 2009-02-05 - 2009-02-07; in: "14th International Symposium on Artificial Life and Robotics", M. Sugisaka, H. Tanaka (ed.); (2009), ISBN: 978-4-9902880-3-7; 293 - 296
On the Power of P and DP Automata / R. Freund, M. Kogler et al. / Analele Univeritatii Bucuresti, LVIII (2009), ISSN: 1224-7170; 5 - 22
Partial Halting and Minimal Parallelism Based on Arbitrary Rule Partitions. / A. Alhazov, R. Freund, M. Oswald, S. Verlan / Fundamenta Informaticae, 91 (2009), 1; 17 - 34

2008

(Tissue) P Systems Working in the k-Restricted Minimally Parallel Mode / R. Freund, S. Verlan / Talk: Theorietag Automaten und Formale Sprachen, Wettenberg-Launsbach; 2008-09-30 - 2008-10-02; in: "18.Theorietag - Automaten und Formale Sprachen", M Holzer, M. Kutrib, A. Malcher (ed.); Justus-Liebig Verlag, (2008), ISBN: 978-3-00-025920-3; 49 - 55
(Tissue) P Systems Working in the k-Restricted Minimally Parallel Mode / R. Freund, S. Verlan / Talk: Internationaler Workshop on Computing with Biomolecules, Wien; 2008-08-27; in: "International Workshop on Computing with Biomolecules", R. Freund, M. Oswald, E. Csuhaj-Varjú, K. Salomaa (ed.); Oesterreichische Computer Gesellschaft, 244 (2008), ISBN: 978-3-85403-244-1; 43 - 53
(Tissue) P systems using non-cooperative rules without halting conditions / M. Beyreder, R. Freund / Talk: Workshop on Membrane Computing, WMC, Edinburgh; 2008-07-28 - 2008-07-31; in: "Proceedings of the Ninth Workshop on Membrane Computing", P. Frisco, D. W. Corne, Gh. Paun (ed.); (2008), 85 - 94
Bio-Inspired Computing: DNA Computing and Membrane Computing / R. Freund / Keynote Lecture: BIRD'08 2nd International Conference on Bioinformatics Research and Development, Wien (invited); 2008-07-07 - 2008-07-09
Membrane Systems / R. Freund / Keynote Lecture: The 12th World Multi-Conference on Systemics, Cybernetics and Informatics: WMSCI 2008, Orlando, Florida (invited); 2008-06-29 - 2008-07-02
P Systems Working in the 1-restricted Minimally Parallel Derivation Mode / R. Freund / Talk: Workshop on Language-Theoretic Models of Decentralized and Distributed Systems, Opava (invited); 2008-06-16 - 2008-06-17
An Integrating View on DNA Computing and Membrane Computing / R. Freund / Keynote Lecture: 10th WSEAS Int. Conf. on MATHEMATICAL METHODS AND COMPUTATIONAL TECHNIQUES IN ELECTRICAL ENGINEERING (MMACTEE '08), Sofia, Bulgaria (invited); 2008-05-02 - 2008-05-04
Extended Spiking neural P systems - variants for modeling the brain / A. Binder, R. Freund, M. Oswald / Talk: Intern. Symp. on Artificial Life and Robotics (AROB), Beppu, Oita, Japan; 2008-01-31 - 2008-02-02; in: "Proc.13th International Symposium on Artificial Life and Robotics AROB13th 2008", M. Sugisaka, H. Tanaka (ed.); (2008), ISBN: 978-4-9902880-2-0; 520 - 524
International Workshop on Computing with Biomolecules / E. Csuhaj-Varjú, R. Freund, M. Oswald, K. Salomaa / Österreichische Computer Gesellschaft, Wien, 2008, ISBN: 978-3-85403-244-1; 101 pages
Unconventional Computing - 7th International Conference, UC 2008 Vienna, Austria, August 25-28, 2008. Proceedings / C. Calude, J.F. Costa, R. Freund, M. Oswald, G. Rozenberg / Springer LNCS, Berlin / Heidelberg, 2008, ISBN: 978-3-540-85193-6; 259 pages
CD Grammar Systems with Regular Start Conditions / R. Freund, M. Oswald / International Journal of Foundations of Computer Science, 19 (2008), 4; 767 - 779
Extended Spiking Neural P Systems with Decaying Spikes and/or Total Spiking / R. Freund, M. Oswald, M. Ionescu / International Journal of Foundations of Computer Science, 19 (2008), 5; 1223 - 1234
Regular ω-Languages defined by Extended Spiking Neural P Systems / R. Freund, M. Oswald / Fundamenta Informaticae (invited), 83 (2008), 1-2; 65 - 73

2007

Modelling Logical Gates with ESNPA Systems / A. Binder, R. Freund, M. Oswald, L. Vock / Talk: Theorietag Automaten und Formale Sprachen, Leipzig; 2007-09-27 - 2007-09-29; in: "17.Theorietag Automaten und Formale Sprachen", M. Droste, M. Lohrey (ed.); (2007), 28 - 32
Symport/Antiport Systems with Partial Halting / R. Freund, M. Oswald / Talk: Theorietag Automaten und Formale Sprachen, Leipzig; 2007-09-27 - 2007-09-29; in: "17.Theorietag Automaten und Formale Sprachen", M. Droste, M. Lohrey (ed.); (2007), 50 - 54
Extended spiking neural P systems with spikes of limited lifetime / R. Freund, M. Ionescu, M. Oswald / Talk: Theorietag Automaten und Formale Sprachen, Leipzig; 2007-09-27 - 2007-09-29; in: "17.Theorietag Automaten und Formale Sprachen", M. Droste, M. Lohrey (ed.); (2007), 45 - 49
Partial Halting in P Systems Using Membrane Rules with Permitting Contexts / A. Alhazov, R. Freund, M. Oswald, S. Verlan / Talk: MCU (International Conference Machines, Computations and Universality), Orleans; 2007-09-10 - 2007-09-13; in: "Machines, Computations, and Universality", J. Durand-Lose, M. Margenstern (ed.); LNCS, Springer, 4664 (2007), ISSN: 0302-9743; 110 - 121
Extended spiking neural P systems with decaying spikes and/or total spiking / R. Freund, M. Ionescu, M. Oswald / Talk: International Workshop Automata for Cellular and Molecular Computing, Budapest; 2007-08-31; in: "Proceedings of the International Workshop Automata for Cellular and Molecular Computing", Gy. Vaszil (ed.); MTA Sztaki, (2007), 64 - 75
Polarizationless P Systems with Active Membranes Working in the Minimally Parallel Mode / R. Freund, Gh. Paun, M. Pérez-Jiménez / Talk: UC2007, Kingston; 2007-08-13 - 2007-08-17; in: "Unconventional Computation", S. Akl, C. Calude et al. (ed.); LNCS, Springer, 4618 (2007), ISBN: 3-540-73553-4; 62 - 76
CD Grammar Systems with Regular Start Conditions / R. Freund, M. Oswald / Talk: International Workshop on Descriptional Complexity of Formal Systems, High Tatras; 2007-07-20 - 2007-07-22; in: "Descriptional Complexity of Formal Systems", V. Geffert, G. Pighizzini (ed.); (2007), ISBN: 978-80-7097-688-3; 69 - 80
A formal framework for P systems / R. Freund, S. Verlan / Talk: Workshop on Membrane Computing, Thessaloniki; 2007-06-25 - 2007-06-28; in: "Eighth Workshop on Membane Computing (WMC8)", G. Eleftherakis, P. Kefalas, Gh. Paun (ed.); South-East European Research Centre, (2007), ISBN: 978-960-89629-2-7; 317 - 330
Spiking neural P systems with inhibitory axons / R. Freund, M. Oswald / Talk: Intern. Symp. on Artificial Life and Robotics (AROB), Beppu; 2007-01-25 - 2007-01-27; in: "Proceedings of the 12th Interantional Symbosium on Artificial Life and Robotics", M. Sugisaka, H. Tamaka (ed.); ISAROB 2007, (2007), ISBN: 978-4-9902880-1-3; 509 - 512
Refining the Nonterminal Complexity of Graph-controlled, Programmed and Matrix Grammars / H. Fernau, R. Freund, M. Oswald, K. Reinhardt / Journal of Automata, Languages and Combinatorics, 12 (2007), 1/2; 117 - 138
Cellular Automata and Parallel Array Systems / R. Freund, F. Tafill / Fundamenta Informaticae, 78 (2007), 3; 311 - 327
Tissue P Systems and (MEM) Brane Systems with Mate and Drip Operations Working on Strings / R. Freund, M. Oswald / Electronic Notes in Theoretical Computer Science (ENTCS), 171 (2007), 105 - 115
Multiset random context grammars, checkers, and transducers / M. Cavaliere, R. Freund, M. Oswald, D. Sburlan / Theoretical Computer Science, 372 (2007), 136 - 151
Partial Halting in P Systems / R. Freund, M. Oswald / International Journal of Foundations of Computer Science, 18 (2007), 6; 1215 - 1225
Modelling Grammar Systems by Tissue P Systems Working in the Sequential Mode / R. Freund, M. Oswald / Fundamenta Informaticae, 76 (2007), 3; 305 - 323

2006

(Tissue) P Systems with Mate and Drip Operations and Cut and Paste Operations / R. Freund, M. Oswald / Talk: ESF Workshop on Automata and formal languages for DNA computation and bioinformatics, Como, Italien; 2006-10-18 - 2006-10-20
Modelling Distributed Systems by P Systems / A. Binder, R. Freund, G. Lojka, M. Oswald / Talk: Theorietag Automaten und Formale Sprachen, Wien; 2006-09-27 - 2006-09-29; in: "Proceedings 16.Theorietag Automaten und Formale Sprachen", R. Freund, M. Oswald (ed.); (2006), 22 - 27
(Mem)Brane Systems and Tissue P Systems with Mate and Drip Operations / R. Freund, M. Oswald / Talk: Theorietag Automaten und Formale Sprachen, Wien; 2006-09-27 - 2006-09-29; in: "Proceedings 16.Theorietag Automaten und Formale Sprachen", R. Freund, M. Oswald (ed.); (2006), 51 - 56
P Systems for Modelling Biological Processes in Living Cells / R. Freund, T. Gschwandtner / Talk: Theorietag Automaten und Formale Sprachen, Wien; 2006-09-27 - 2006-09-29; in: "Proceedings 16.Theorietag Automaten und Formale Sprachen", R. Freund, M. Oswald (ed.); (2006), 46 - 50
Membrane Systems with Attributes for Modelling Business Transactions / R. Freund, M. Oswald, T. Schirk / Talk: Theorietag Automaten und Formale Sprachen, Wien; 2006-09-27 - 2006-09-29; in: "Proceedings 16.Theorietag Automaten und Formale Sprachen", R. Freund, M. Oswald (ed.); (2006), 57 - 62
Extended Spiking Neural P Systems as Generating Devices for Strings and Vectors of Non-Negative Integers / A. Alhazov, R. Freund, M. Oswald, M. Slavkovik / Talk: Theorietag Automaten und Formale Sprachen, Wien; 2006-09-27 - 2006-09-29; in: "Proceedings 16.Theorietag Automaten und Formale Sprachen", R. Freund, M. Oswald (ed.); (2006), 17 - 21
How a membrane agent buys goods in a membrane store / R. Freund, M. Oswald, T. Schirk / Talk: BIC-TA 2006, Wuhan, China; 2006-09-18 - 2006-09-22; in: "Pre-proc. of Int. Conf. on Bio-Inspired Computing - Theory and Applications, BIC-TA 2006, Membrane Computing Section", L. Pan, Gh. Paun (ed.); (2006), 93 - 102
Applications of membrane systems in distributed systems / A. Binder, R. Freund, G. Lojka, M. Oswald / Talk: BIC-TA 2006, Wuhan, China; 2006-09-18 - 2006-09-22; in: "Pre-proc. of Int. Conf. on Bio-Inspired Computing - Theory and Applications, BIC-TA 2006, Membrane Computing Section", L. Pan, Gh. Paun (ed.); (2006), 37 - 50
Modeling the Dynamical Parallelism of Bio-Systems / E. Csuhaj-Varjú, R. Freund, D. Sburlan / Talk: Workshop on Membrane Computing, WMC7, Leiden, Niederlande; 2006-07-17 - 2006-07-21; in: "pre-proceedings of the 7th Workshop on Membrane Computing WMC7", H. Hoogeboom, Gh. Paun, G. Rozenberg (ed.); (2006), 290 - 310
Tissue P Systems with Communication Modes / F. Bernardini, R. Freund / Talk: Workshop on Membrane Computing, WMC7, Leiden, Niederlande; 2006-07-17 - 2006-07-21; in: "pre-proceedings of the 7th Workshop on Membrane Computing WMC7", H. Hoogeboom, Gh. Paun, G. Rozenberg (ed.); (2006), 132 - 144
Extended Spiking Neural P Systems Generating Strings and Vectors of Non-Negative Integers / A. Alhazov, R. Freund, M. Oswald, M. Slavkovik / Talk: Workshop on Membrane Computing, WMC7, Leiden, Niederlande; 2006-07-17 - 2006-07-21; in: "pre-proceedings of the 7th Workshop on Membrane Computing WMC7", H. Hoogeboom, Gh. Paun, G. Rozenberg (ed.); (2006), 88 - 101
Tissue P systems with mate and drip operations / R. Freund, M. Oswald / Talk: MeCBIC2006 Workshop on Membrane Computing and Biologically Inspired Process Calculi, S. Servolo, Venice, Italy; 2006-07-09; in: "MeCBIC2006 Workshop on Membrane Computing and Biologically Inspired Process Calculi", N. Busi, C. Zandron (ed.); (2006), 1 - 12
Special variants of P systems with one catalyst in one membrane / R. Freund / Talk: DCFS (Descriptional Complexity of Formal Systems), Las Cruces, New Mexico, USA; 2006-06-21 - 2006-06-23
A small universal antiport P system with forbidden context / R. Freund, M. Oswald / Talk: DCFS (Descriptional Complexity of Formal Systems), Las Cruces, New Mexico, USA; 2006-06-21 - 2006-06-23
Algebraic representation of regular array languages / R. Freund / Talk: ESF Exploratory Workshop: Advances on Two-dimensional Language Theory, Salerno, Italien; 2006-05-03 - 2006-05-05
Syntactical pattern recognition with 2-dimensional array grammars and array automata / R. Freund / Talk: ESF Exploratory Workshop: Advances on Two-dimensional Language Theory, Salerno, Italien; 2006-05-03 - 2006-05-05
Contextual Array Grammars / R. Freund, Gh. Paun, G. Rozenberg / in: "Formal Models, Languages and Applications", K. Subramanian et al. (ed.); World Scientific, Singapore, 2006, ISBN: 981-256-889-1, 112 - 136
Proceedings 16.Theorietag Automaten und Formale Sprachen / R. Freund, M. Oswald / TU Wien, Wien, 2006
Membrane Computing · 6th International Workshop, WMC 2005, Vienna, Austria, July 18-21, 2005, Revised Selected and Invited Papers / R. Freund, Gh. Paun, G. Rozenberg, A. Salomaa / Springer LNCS 3850, Berlin, 2006, ISBN: 978-3-540-30948-2; 371 pages
P colonies and prescribed teams / R. Freund, M. Oswald / International Journal of Computer Mathematics, 83 (2006), 7; 569 - 592
Membrane division, restricted membrane creation and object complexity in P systems / A. Alhazov, R. Freund, A. Riscos-Núñez / International Journal of Computer Mathematics, 83 (2006), 7; 529 - 548
Routes and Products of Monoids / A. Mateescu, R. Freund / Fundamenta Informaticae, 73 (2006), 1-2; 205 - 211
Cell/symbol complexity of tissue P systems with symport/antiport rules / A. Alhazov, R. Freund, M. Oswald / International Journal of Foundations of Computer Science, 17 (2006), 1; 3 - 25
(Tissue) P Systems with Unit Rules and Energy Assigned to Membranes / A. Alhazov, R. Freund, A. Leporati, M. Oswald, C. Zandron / Fundamenta Informaticae, 74 (2006), 4; 391 - 408
Small Universal Antiport P Systems and Universal Multiset Grammars / R. Freund, M. Oswald / in: "Proceedings of the Fourth Brainstorming Week on Membrane Computing, Volume II", C. Graciani-Díaz, Gh. Paun, A. Romero-Jiménez, F. Sancho-Caparrini (ed.); Fénix Editora, Sevilla, 2006, 51 - 64
Particular Results for Variants of P Systems with One Catalyst in One Membrane / R. Freund / in: "Proceedings of the Fourth Brainstorming Week on Membrane Computing, Volume II", C. Graciani-Díaz, Gh. Paun, A. Romero-Jiménez, F. Sancho-Caparrini (ed.); Fénix Editora, Sevilla, 2006, 41 - 50
On String Languages Generated by Spiking Neural P Systems / H. Chen, R. Freund, M. Ionescu, Gh. Paun, M. Pérez-Jiménez / in: "Proceedings of the Fourth Brainstorming Week on Membrane Computing, Volume I", M.A. Gutiérrez-Naranjo, Gh. Paun, A. Riscos-Núñez, F.J. Romero-Campero (ed.); Fénix Editora, Sevilla, 2006, 169 - 194
Multiset Random Context Grammars, Checkers, and Transducers / M. Cavaliere, R. Freund, M. Oswald, D. Sburlan / in: "Proceedings of the Fourth Brainstorming Week on Membrane Computing, Volume I", M.A. Gutiérrez-Naranjo, Gh. Paun, A. Riscos-Núñez, F.J. Romero-Campero (ed.); Fénix Editora, Sevilla, 2006, 113 - 132
Two Universality Results for (Mem)Brane Systems / D. Besozzi, N. Busi, G. Franco, R. Freund, Gh. Paun / in: "Proceedings of the Fourth Brainstorming Week on Membrane Computing, Volume I", M.A. Gutiérrez-Naranjo, Gh. Paun, A. Riscos-Núñez, F.J. Romero-Campero (ed.); Fénix Editora, Sevilla, 2006, 49 - 62
Computational Power of Symport/Antiport: History, Advances, and Open Problems / A. Alhazov, R. Freund, Y. Rogozhin / in: "Membrane Computing · 6th International Workshop, WMC 2005, Vienna, Austria, July 18-21, 2005, Revised Selected and Invited Papers", R. Freund, Gh. Paun, G. Rozenberg, A. Salomaa (ed.); Springer LNCS 3850, Berlin, 2006, (invited), ISBN: 978-3-540-30948-2, 1 - 31
Symbol/Membrane Complexity of P Systems with Symport/Antiport Rules / A. Alhazov, R. Freund, M. Oswald / in: "Membrane Computing · 6th International Workshop, WMC 2005, Vienna, Austria, July 18-21, 2005, Revised Selected and Invited Papers", R. Freund, Gh. Paun, G. Rozenberg, A. Salomaa (ed.); Springer LNCS 3850, Berlin, 2006, ISBN: 978-3-540-30948-2, 97 - 114

2005

Optimal Nonterminal Complexity of Graph-controlled Grammars / H. Fernau, R. Freund, M. Oswald, K. Reinhardt / Talk: Theorietag Automaten und Formale Sprachen, Lauterbad bei Freudenstadt; 2005-09-28 - 2005-09-29; in: "15. Theorietag der GI Fachgruppe 0.1.5 Automaten und Formale Sprachen", H. Fernau (ed.); (2005), ISSN: 0946-3852; 13 - 17
Membrane Systems as a Model for Distributed Computing / A. Binder, R. Freund, G. Lojka, M. Oswald / Talk: Theorietag Automaten und Formale Sprachen, Lauterbad bei Freudenstadt; 2005-09-28 - 2005-09-29; in: "15. Theorietag der GI Fachgruppe 0.1.5 Automaten und Formale Sprachen", H. Fernau (ed.); (2005), ISSN: 0946-3852; 1 - 5
One and Two Polarizations, Membrane Creation and Objects Complexity in P Systems / A. Alhazov, R. Freund, A. Riscos-Núñez / Talk: International Workshop on Theory and Application of P Systems (TAPS), Timisoara, Romania; 2005-09-26 - 2005-09-27; in: "Proceedings of the 1st International Workshop on Theory and Application of P Systems", G. Ciobanu, Gh. Paun (ed.); ???, (2005), 9 - 18
P Colonies Working in the Maximally Parallel and in the Sequential Mode / R. Freund, M. Oswald / Talk: International Workshop on Theory and Application of P Systems (TAPS), Timisoara, Romania; 2005-09-26 - 2005-09-27; in: "Proceedings of the 1st International Workshop on Theory and Application of P Systems", G. Ciobanu, Gh. Paun (ed.); (2005), 49 - 56
Symbol/Membrane Complexity of P Systems with Symport/Antiport Rules / A. Alhazov, R. Freund, M. Oswald / Talk: Workshop on Membrane Computing, Wien; 2005-07-18 - 2005-07-21; in: "Preproceedings of the 6th International Workshop on Membrane Computing WMC6", F. Freund, G. Lojka, M. Oswald, Gh. Paun (ed.); (2005), 123 - 146
Computational Power of Symport/Antiport: History, Advances and Open Problems / A. Alhazov, R. Freund, Y. Rogozhin / Talk: Workshop on Membrane Computing, Wien (invited); 2005-07-18 - 2005-07-21; in: "Preproceedings of the 6th International Workshop on Membrane Computing WMC6", R. Freund, G. Lojka, M. Oswald, Gh. Paun (ed.); (2005), 44 - 78
Tissue P Systems with Antiport Rules and Small Numbers of Symbols and Cells / A. Alhazov, R. Freund, M. Oswald / Talk: International Conference on Developments in Language Theory (DLT), Palermo, Italy; 2005-07-04 - 2005-07-08; in: "Developments in Language Theory. 9th International Conference, DLT 2005", C. De Felice, A. Restivo (ed.); Springer, LNCS 3572 (2005), ISBN: 3-540-26546-5; 100 - 111
Refining the Nonterminal Complexity of Graph-controlled Grammars / H. Fernau, R. Freund, M. Oswald, K. Reinhardt / Talk: International Workshop on Descriptional Complexity of Formal Systems, Como, Italy; 2005-06-30 - 2005-07-02; in: "Seventh International Workshop on Descriptional Complexity of Formal Systems, Proceedings", C. Mereghetti, B. Palano, G. Pighizzini, D. Wotschke (ed.); (2005), 110 - 121
Membrane Computing / R. Freund / Keynote Lecture: 4th WSEAS International Conference on ARTIFICIAL INTELLIGENCE, KNOWLEDGE ENGINEERING and DATABASES (AIKED `05), Salzburg (invited); 2005-02-13 - 2005-02-15
P systems with active membranes and without polarizations / R. Freund, A. Paun / Soft Computing, 9 (2005), 9; 657 - 663
Representations of Recursively Enumerable Array Languages by Contextual Array Grammars / H. Fernau, R. Freund, M Holzer / Fundamenta Informaticae, 64 (2005), 1-4; 159 - 170
Tissue P Systems with Channel States / R. Freund, Gh. Paun, M. Pérez-Jiménez / Theoretical Computer Science, 330 (2005), 101 - 116
Modelling Artificial Life by Attributed Eco-array Grammars / A. Binder, R. Freund, M. Oswald / Artificial Life and Robotics, 9 (2005), 1; 63 - 66
P Systems Working in the Sequential Mode on Arrays and Strings / R. Freund / International Journal of Foundations of Computer Science, 16 (2005), 4; 663 - 682
Optimal Results for the Computational Completeness of Gemmating (Tissue) P Systems / R. Freund, M. Oswald, A. Paun / International Journal of Foundations of Computer Science, 16 (2005), 5; 929 - 942
Computationally Universal P Systems without Priorities: Two Catalysts are Sufficient / R. Freund, L. Kari, M. Oswald, P. Sosik / Theoretical Computer Science, 330 (2005), 251 - 266
Computational Completeness of P Systems with Active Membranes and Two Polarizations / A. Alhazov, R. Freund, Gh. Paun / in: "Machines, Computations, and Universality", M. Margenstern (ed.); Springer, LNCS, Berlin, 2005, ISBN: 3-540-25261-4, 82 - 92
Tissue P Systems with Symport/Antiport Rules of One Symbol are Computationally Universal / R. Freund, M. Oswald / in: "Cellular Computing (Complexity Aspects)", M.A. Gutiérrez-Naranjo, Gh. Paun, M. Pérez-Jiménez (ed.); Fénix Editora, Sevilla, 2005, 187 - 200
Some Optimal Results on Symport/Antiport P Systems with Minimal Cooperation / A. Alhazov, R. Freund, Y. Rogozhin / in: "Cellular Computing (Complexity Aspects)", M.A. Gutiérrez-Naranjo, Gh. Paun, M. Pérez-Jiménez (ed.); Fénix Editora, Sevilla, 2005, 23 - 36
Tissue P Systems with Antiport Rules and Small Numbers of Symbols and Cells / A. Alhazov, R. Freund, M. Oswald / in: "Cellular Computing (Complexity Aspects)", M.A. Gutiérrez-Naranjo, Gh. Paun, M. Pérez-Jiménez (ed.); Fénix Editora, Sevilla, 2005, 7 - 22
Matrix Languages, Register Machines, Vector Addition Systems / R. Freund, O.H. Ibarra, Gh. Paun, H.-C. Yen / in: "Third Brainstorming Week on Membrane Computing", M.A. Gutiérrez-Naranjo, A. Riscos-Núñez, F.J. Romero-Campero, D. Sburlan (ed.); issued by: Research Group on Natural Computing, Sevilla University; Fénix Editora, Sevilla, 2005, 155 - 168
Event-related Outputs of Computations in P Systems / M. Cavaliere, R. Freund, A. Leitsch, Gh. Paun / in: "Third Brainstorming Week on Membrane Computing", M.A. Gutiérrez-Naranjo, A. Riscos-Núñez, F.J. Romero-Campero, D. Sburlan (ed.); issued by: Research Group on Natural Computing, Sevilla University; Fénix Editora, Sevilla, 2005, 107 - 122
P Systems with One Membrane and Symport/Antiport Rules of Five Symbols are Coputationally Complete / A. Alhazov, R. Freund / in: "Third Brainstorming Week on Membrane Computing", M.A. Gutiérrez-Naranjo, A. Riscos-Núñez, F.J. Romero-Campero, D. Sburlan (ed.); issued by: Research Group on Natural Computing, Sevilla University; Fénix Editora, Sevilla, 2005, 19 - 28
P Systems Generating Trees / R. Freund, M. Oswald, A. Paun / in: "Membrane Computing. International Workshop, WMC 2004", G. Mauri, Gh. Paun, M. Pérez-Jiménez, G. Rozenberg, A. Salomaa (ed.); Springer, LNCS, Berlin, 2005, ISBN: 3-540-25080-8, 309 - 319
On the Efficiency of P Systems with Active Membranes and Two Polarizations / A. Alhazov, R. Freund / in: "Membrane Computing. International Workshop, WMC 2004", G. Mauri, Gh. Paun, M. Pérez-Jiménez, G. Rozenberg, A. Salomaa (ed.); Springer, LNCS, Berlin, 2005, ISBN: 3-540-25080-8, 146 - 160
Asynchronous P Systems and P Systems Working in the Sequential Mode / R. Freund / in: "Membrane Computing. International Workshop, WMC 2004", G. Mauri, Gh. Paun, M. Pérez-Jiménez, G. Rozenberg, A. Salomaa (ed.); Springer, LNCS, Berlin, 2005, (invited), ISBN: 3-540-25080-8, 36 - 62
Sequential P Systems with Unit Rules and Energy Assigned to Membranes / R. Freund, A. Leporati, M. Oswald, C. Zandron / in: "Machines, Computations, and Universality", M. Margenstern (ed.); Springer, LNCS, Berlin, 2005, ISBN: 3-540-25261-4, 200 - 210

2004

Asynchronous P Systems on Arrays and Strings / R. Freund / Talk: International Conference on Developments in Language Theory (DLT), Auckland, New Zealand; 2004-12-13 - 2004-12-17
Cellular Automata and Parallel Array Systems / R. Freund, F. Tafill / Talk: Workshop on Tilings and Cellular Automata (WTCA), Auckland, New Zealand; 2004-12-12; in: "Proceedings of the International Workshop on Tilings and Cellular Automata, 2004", M. Margenstern (ed.); CDMTCS Research Report Series, 253 (2004), 1 - 14
Tissue P Systems Simulating Grammar Systems / R. Freund, M. Oswald / Talk: Molecular Computing, Leiden, the Netherlands; 2004-11-22 - 2004-11-26
P Systems Working in the Asynchronous and the Sequential Mode / R. Freund / Talk: Molecular Computing, Leiden, the Netherlands; 2004-11-22 - 2004-11-26
Implementierung von katalytischen P-Systemen / A. Binder, R. Freund, G. Lojka, M. Oswald / Talk: Theorietag Automaten und Formale Sprachen, Caputh bei Potsdam, Germany; 2004-09-27 - 2004-09-30; in: "Workshop Formale Methoden der Linguistik und 14. Theorietag Automaten und Formale Sprachen. Preprint 2/2004, Institut für Informatik, Universität Potsdam, 2004.", S. Bensch, O. Boldt, H. Bordihn, H. Jürgensen (ed.); (2004), 49 - 53
Modellierung von Grammatiksystemen durch P-Systeme / R. Freund, M. Oswald / Talk: Theorietag Automaten und Formale Sprachen, Caputh bei Potsdam, Germany; 2004-09-27 - 2004-09-30; in: "Workshop Formale Methoden der Linguistik und 14. Theorietag Automaten und Formale Sprachen. Preprint 2/2004, Institut für Informatik, Universität Potsdam, 2004.", S. Bensch, O. Boldt, H. Bordihn, H. Jürgensen (ed.); (2004), 63 - 67
P-Systeme im sequentiellen Modus / R. Freund / Talk: Theorietag Automaten und Formale Sprachen, Caputh bei Potsdam, Germany; 2004-09-27 - 2004-09-30; in: "Workshop Formale Methoden der Linguistik und 14. Theorietag Automaten und Formale Sprachen. Preprint 2/2004, Institut für Informatik, Universität Potsdam, 2004", S. Bensch, O. Boldt, H. Bordihn, H. Jürgensen (ed.); (2004), 57 - 61
Sequential P Systems with Unit Rules and Energy Assigned to Membranes / R. Freund, A. Leporati, M. Oswald, C. Zandron / Talk: MCU (International Conference Machines, Computations and Universality), St. Petersburg, Russia; 2004-09-21 - 2004-09-26
Computational Completeness of P Systems with Active Membranes and Two Polarizations / A. Alhazov, R. Freund, Gh. Paun / Talk: MCU (International Conference Machines, Computations and Universality), St. Petersburg, Russia; 2004-09-21 - 2004-09-26
Extended Gemmating P Systems are Computationally Complete with Four Membranes / R. Freund, M. Oswald, A. Paun / Talk: DCFS (Descriptional Complexity of Formal Systems), London, Ontario, Canada; 2004-07-26 - 2004-07-28; in: "Pre-proceedings DCFS 2004, Western University, London, Ontario, Canada, 2004", L. Ilie, D. Wotschke (ed.); (2004), 24 - 33
Implementation of Catalytic P Systems / A. Binder, R. Freund, G. Lojka, M. Oswald / Talk: CIAA (Conference on Implementation and Application of Automata), Kingston, Ontario, Canada; 2004-07-22 - 2004-07-24; in: "Pre-proceedings CIAA 2004, Queen's University, Kingston, Ontario, Canada, 2004", M. Domaratzky, A. Okhotin, K. Salomaa, S. Yu (ed.); (2004), 24 - 33
Modelling Grammar Systems by Tissue P Systems / R. Freund, M. Oswald / Talk: Grammar Systems Week, International Workshop, Budapest; 2004-07-05 - 2004-07-09; in: "Prel. Proc. of Grammar Systems Week 2004, MTA Sztaki, Budapest 2004", E. Csuhaj-Varjú, Gy. Vaszil (ed.); (2004), 162 - 179
P Systems Generating Trees / R. Freund, M. Oswald, A. Paun / Talk: Workshop on Membrane Computing, Milano, Italy; 2004-06-14 - 2004-06-16; in: "Pre-proceedings of the Fifth Workshop on Membrane Computing, Milano - Italy, June 2004 (WMC5)", G. Mauri, Gh. Paun, C. Zandron (ed.); (2004), 221 - 232
On the Efficiency of P Systems with Active Membranes and Two Polarizations. / A. Alhazov, R. Freund / Talk: Workshop on Membrane Computing, Milano, Italy; 2004-06-14 - 2004-06-16; in: " Pre-proceedings of the Fifth Workshop on Membrane Computing, Milano - Italy, June 2004 (WMC5)", G. Mauri, Gh. Paun, C. Zandron (ed.); (2004), 81 - 94
Asynchronous P Systems / R. Freund / Talk: Workshop on Membrane Computing, Milano, Italy (invited); 2004-06-14 - 2004-06-16; in: " Pre-proceedings of the Fifth Workshop on Membrane Computing, Milano - Italy, June 2004 (WMC5)", G. Mauri, Gh. Paun, C. Zandron (ed.); (2004), 12 - 28
P Systems with Antiport Rules for Evolution Rules / R. Freund, M. Oswald / Talk: WSEAS Internation Conference on Evolutionary Computation, Udine, Italy; 2004-03-25 - 2004-03-27
Modelling Artificial Life by Attributed Eco-array Systems / A. Binder, R. Freund, M. Oswald / Talk: Intern. Symp. on Artificial Life and Robotics (AROB), Beppu, Oita, JAPAN; 2004-01-28 - 2004-01-30; in: "Proceedings of the ninth International Symposium on Artificial Life and Robotics (AROB 9th '04)", M. Sugisaka, H. Tanaka (ed.); (2004), ISBN: 4-9900462-4-2; 45 - 48
Splicing Test Tube Systems and Their Relation to Splicing Membrane Systems / F. Freund, R. Freund, M. Oswald / in: "Aspects of Molecular Computing. Essays Dedicated to Tom Head on the Occasion of His 70th Birthday", N. Jonoska, Gh. Paun, G. Rozenberg (ed.); Springer, Heidelberg, 2004, ISBN: 3-540-20781-3, 139 - 151
P Systems with Conditional Communication Rules Assigned to Membranes / R. Freund, M. Oswald / Journal of Automata, Languages and Combinatorics, 9 (2004), 4; 387 - 397
P Systems with Antiport Rules for Evolution Rules / R. Freund, M. Oswald / WSEAS Transactions on Systems, 2 (2004), 3; 866 - 873
P Automata with Membrane Channels / R. Freund, M. Oswald / Artificial Life and Robotics, 8 (2004), 2; 186 - 189
P Systems with Local Graph Productions / R. Freund, M. Oswald / New Generation Computing, 22 (2004), 365 - 375
From Regulated Rewriting to Computing with Membranes: collapsing Hierarchies / R. Freund, C. Martin-Vide, Gh. Paun / Theoretical Computer Science, 312 (2004), 143 - 188
P Systems Working in the Sequential Mode on Arrays and Strings / R. Freund / in: "Developments in Language Theory, 8th International Conference, DLT 2004, Auckland, New Zealand, December 13-17, Proceedings", C. Calude, E. Calude, M. Dinneen (ed.); Springer LNCS 3340, Heidelberg, 2004, ISBN: 3-540-24014-4, 188 - 199
P Systems with Active Membranes and without Polarizations / R. Freund, A. Paun / in: "Second Brainstorming Week on Membrane Computing", Gh. Paun, A. Riscos-Núñez, A. Romero-Jiménez, F. Sancho-Caparrini (ed.); Universidad de Sevilla, Sevilla, 2004, 193 - 205
Tissue-like P Systems with Channel-States / R. Freund, Gh. Paun, M. Pérez-Jiménez / in: "Second Brainstorming Week on Membrane Computing", Gh. Paun, A. Riscos-Núñez, A. Romero-Jiménez, F. Sancho-Caparrini (ed.); Universidad de Sevilla, Sevilla, 2004, 206 - 223
P Systems with Antiport Rules for Evolution Rules / R. Freund, M. Oswald / in: "Second Brainstorming Week on Membrane Computing", Gh. Paun, A. Riscos-Núñez, A. Romero-Jiménez, F. Sancho-Caparrini (ed.); Universidad de Sevilla, Sevilla, 2004, 183 - 192
Sequential P Systems with Unit Rules and Energy Assigned to Membranes / R. Freund, A. Leporati, M. Oswald, C. Zandron / in: "Second Brainstorming Week on Membrane Computing", Gh. Paun, A. Riscos-Núñez, A. Romero-Jiménez, F. Sancho-Caparrini (ed.); Universidad de Sevilla, Sevilla, 2004, 168 - 182
P Systems with Active Membranes and Two Polarizations / A. Alhazov, R. Freund, Gh. Paun / in: "Second Brainstorming Week on Membrane Computing", Gh. Paun, A. Riscos-Núñez, A. Romero-Jiménez, F. Sancho-Caparrini (ed.); Universidad de Sevilla, Sevilla, 2004, 20 - 37
P Systems with Cutting/Recombination Rules Assigned to Membranes / F. Freund, R. Freund, M. Oswald, M. Margenstern, Y. Rogozhin, S. Verlan / in: "Membrane Computing. International Workshop, WMC 2003, Tarragona, Spain, July 17-22, 2003", C. Martin-Vide, G. Mauri, Gh. Paun, G. Rozenberg, A. Salomaa (ed.); Springer, Heidelberg, 2004, ISBN: 3-540-20895-x, 191 - 202
ω-P automata with Communication Rules / R. Freund, M. Oswald, L. Staiger / in: "Membrane Computing. International Workshop WMC 2003, Tarragona, Spain, July 17-22, 2003 ", C. Martin-Vide, G. Mauri, Gh. Paun, G. Rozenberg, A. Salomaa (ed.); Springer, Heidelberg, 2004, ISBN: 3-540-20895-x, 203 - 217
Modelling Grammar Systems by Tissue P Systems Working in the Sequential Mode / R. Freund, M. Oswald / in: "Proceedings of Grammar Systems Week 2004, Budapest, Hungary, July 5-9, 2004", E. Csuhaj-Varjú, Gy. Vaszil (ed.); MTA Sztaki, 2004, 179 - 199

2003

Complexity of P Automata with Catalysts / R. Freund, M. Oswald / Talk: Annual Meeting of Project MolCoNet, Vienna, Austria; 2003-11-27 - 2003-11-29
P Automaten und ω-P Automaten / R. Freund, M. Oswald, L. Staiger / Talk: Theorietag Automaten und Formale Sprachen, Herrsching bei München, Deutschland; 2003-09-29 - 2003-10-02; in: "Proc. 13. Theorietag "Automaten und Formale Sprachen" ", (2003), 35 - 47
ω-P automata with Communication Rules / R. Freund, M. Oswald, L. Staiger / Talk: Workshop on Membrane Computing, Tarragona, Spain; 2003-07-17 - 2003-07-22; in: "Preproceedings of the Workshop on Membrane Computing", (2003), 252 - 265
P systems with cutting/recombination rules assigned to membranes / F. Freund, R. Freund, M. Margenstern, M. Oswald / Talk: Workshop on Membrane Computing, Tarragona, Spain; 2003-07-17 - 2003-07-23; in: "Preproceedings of the Workshop on Membrane Computing", (2003), 241 - 251
P systems with Conditional Communication Rules Assigned to Membranes / R. Freund, M. Oswald / Talk: Workshop on Membrane Computing, Tarragona; 2003-07-17 - 2003-07-22; in: "Preproceedings of the Workshop on Membrane Computing", (2003), 231 - 240
Reducing the Number of Catalysts Needed in Computationally Universal Systems without Priorities / R. Freund, M. Oswald, P. Sosik / Talk: International Workshop on Descriptional Complexity of Formal Systems, Budapest, Hungary; 2003-07-12 - 2003-07-14; in: "5th International Workshop on Descriptional Complexity of Formal Systems", (2003), 102 - 113
On Three Classes Automata-like P Systems / R. Freund, C. Martin-Vide, A. Obtulowicz, Gh. Paun / Talk: International Conference on Developments in Language Theory (DLT), Szeged, Hungary; 2003-07-07 - 2003-07-11; in: "Developments in Language Theory", Springer, LNCS 2710 (2003), ISBN: 3-540-40434-1; 292 - 303
P Systems with Elementary Graph Productions / R. Freund, M. Oswald / Talk: EMCC Spring Meeting, Turku, Finland; 2003-05-15 - 2003-05-17
P Automata with Membrane Channels / M. Oswald, R. Freund / Talk: Intern. Symp. on Artificial Life and Robotics (AROB), Beppu, Oita, Japan; 2003-01-24 - 2003-01-26; in: "Proc of the Eigth Intl. Symp. on Artificial Life and Robotics (AROB 8th '03)", (2003), ISBN: 4-9900462-3-4; 275 - 278
A Note on Emergence in Multi-Agent String Processing Systems / R. Freund, J Kelemen, Gh. Paun / Computing and Informatics, 22 (2003), 623 - 637
Hybrid Modes in Cooperating Distributed Grammar Systems: Combining the t-mode with the Modes <=k and =k / H. Fernau, M Holzer, R. Freund / Theoretical Computer Science, 299 (2003), 633 - 662
P Systems Without Priorities are Computationally Universal / P. Sosik, R. Freund / in: "Membrane Computing. International Workshop, WMC-CdeA 2002, Curtea de Arges, Romania", R. Freund (ed.); Springer, 2003, ISBN: 3-540-00611-7, 400 - 409
Membrane Systems with Symport/Antiport: Universality Results / R. Freund, Gh. Paun / in: "Membrane Computing. International Workshop, WMC-CdeA 2002, Curtea de Arges, Romania", Gh. Paun et al. (ed.); Springer, 2003, ISBN: 3-540-00611-7, 270 - 287
P Systems with Activated/Prohibited Membrane Channels / R. Freund, M. Oswald / in: "Membrane Computing. International Workshop, WMC-CdeA 2002, Curtea de Arges, Romania", Gh. Paun et al. (ed.); Springer, 2003, ISBN: 3-540-00611-7, 261 - 268
Energy-controlled P systems / R. Freund / in: "Membrane Computing. International Workshop, WMC-CdeA 2002, Curtea de Arges, Romania", Gh. Paun et al. (ed.); issued by: Workshop on Membrane Computing; Springer, LNCS 2597, 2003, ISBN: 3-540-00611-7, 247 - 260

2002

P automata on finite and infinite words / R. Freund / Talk: Annual Meeting of Project MolCoNet, Budapest; 2002-11-29 - 2002-11-30
P-Systeme mit Energiekontrolle / R. Freund / Talk: Theorietag Automaten und Formale Sprachen, Wittenberg; 2002-09-23 - 2002-09-26; in: " Proceedings 12. Theorietag Automaten und Formale Sprachen", (2002), 27 - 28
Energy-controlled P systems / R. Freund / Talk: Workshop on Membrane Computing, Curtea de Arges, Romania; 2002-08-19 - 2002-08-23; in: "Workshop on Membrane Computing", MolCoNet, (2002), 221 - 236
Some comments on P systems with communication / R. Freund / Talk: Workshop on Membrane Computing, Curtea de Arges, Romania; 2002-08-19 - 2002-08-23
P systems versus register machines: two universality proofs / R. Freund / Talk: Workshop on Membrane Computing, Curtea de Arges, Romania; 2002-08-19 - 2002-08-23
A Short Note on Analysing P Systems with Antiport Rules / R. Freund, M. Oswald / EATCS Bulletin, 78 (2002), 231 - 236
GP Systems with Forbidding Context / R. Freund, M. Oswald / Fundamenta Informaticae, 49 (2002), 1-3; 81 - 102
On some operations on strings suggested by gene assembly in ciliates / R. Freund, C. Martin-Vide, V. Mitrana et al. / New Generation Computing, 20 (2002), 279 - 293
String Rewriting Sequential P-Systems and Regulated Rewriting / P. Sosik, R. Freund / in: "Developments in Language Theory", issued by: Werner Kuich, Grzegorz Rozenberg, Arto Salomaa; Springer, 2002, ISBN: 3-540-43453-4, 379 - 388