Curriculum Vitae and Research Interests of René Jorna (University of Groningen)

My research interests are the following:

1) Planning and scheduling

2) Semiotics

3) Decision support systems

4) Knowledge management, innovation and knowledge conversion

5) Curriculum Vitae

Ad 1) Planning and scheduling: Creating computer systems to perform a task that requires expert knowledge is complex. To a certain extent, the developer has to gain the task expertise himself in order to design adequate decision support. Several methods are available to capture knowledge of an expert and to implement this in a knowledge based system. However, these methods do not make adequate use of previous experiences encountered in development trajectories in the same problem domain. We were confronted with this problem in the domain of planning and scheduling. In building knowledge based systems for scheduling support (e.g., ZKR, for nurse scheduling) we realized that there could be possibilities for reuse. We saw several similarities in the domain as well as in the systems, but were unable to get grip on the issue at once. An adequate apparatus for modeling the scheduling domain, the task execution and the supporting systems was missing. The development process of computer systems for task support of planning and scheduling is no unique activity that must be performed from scratch each time. Reuse of previously created conceptual and technical products is possible and recommendable. We claim that adequate computer support starts with a (cognitive) task analysis. This analysis reveals general as well as unique aspects. The general aspects can be reused. However, a generic conceptual framework is necessary that separates general from unique aspects in the task domain and task performance. We propose the Scheduling Expertise Concept (SEC) as such a framework for planning and scheduling. The framework is domain independent and takes into account organizational and task performance characteristics. This generic framework is implemented in a computer system, the SEC-system. The SEC-models and SEC-system enable faster development processes in the planning and scheduling domain.

Ad 2) Semiotics: From the point of view of Artificial Intelligence (A.I.) the time has come to establish a scientific field or discipline related to communication and interaction based on signs, that is to say symbols, signals, icons, etc. However, such a field already exists, it is called semiotics, but it is not as well known as it should be. This situation has to be regretted for two reasons. In the first place because several elements of this field can easily be applied to A.I. research, e.g., theory fragments from the works of Leibniz, Peirce, Morris, Hjelmslev, Goodman and Eco. In the second place there remains an explicit need for a theory of communication and interaction between natural and artificial intelligent systems. The communication between humans and between humans and computers is often realized with the help of highly sophisticated signs and other communication structures.

Posner has demarcated the field of semiotics in the very first issue of the Zeitschrift fĂŒr Semiotik (1979), as follows:

•    Semiotics studies all sorts of sign processes in the communication and the exchange of information between humans, between humans and other organisms and inside organisms in general.

In this definition there is no reference to the concepts and latest results of the study of human cognition and computer systems. Moreover, there is no mention of the fact that the processing of information is considered to involve symbol systems, symbol manipulation, computation and (mental) representations. For that reason I proposed a slightly adjusted definition (Jorna, 1990).

•    Semiotics is the study of all sorts of sign or symbol process in the communication and the exchange of knowledge, in the sense of data, between and inside information processing systems, such as humans, other organisms and machines.

Definition (2) has the advantage that it takes into account the conception of sophisticated modern computers as well as humans as symbol manipulating devices. The forthcoming Handbook of Semiotics by Posner, Sebeok & Robering (1999), includes the latest research efforts on semiotics and classifies the study of signs in relation to such areas as endosemiosis, zoosemiosis, phytosemiosis, anthroposemiosis and machinesemiosis. Semiosis is equivalent with sign (or symbol) processing and represents the object level. Semiotics represents the meta level and studies signs, sign structures and sign processing. Nöth (1985) provides an extensive overview of all sorts of interpretations of semiotics and confronts the broad definitions (1) and (2) with a narrow definition, in which semiotics is restricted to the field of anthroposemiotics. Within this field, criteria such as cultural determination (which opposes nature and culture), systematicity of signs (which focuses on the structure of sign systems) and intentionality (which means that only signs produced with the intention to communicate are relevant to study) are formulated. These criteria further restrict the applicability of semiotics.

Ad 3) Decision support systems: From a classical point of view decision support software mostly consists in sophisticated assistance for mathematical and arithmetic procedures. Decision making, however, often consists of questions related to information gathering, sense making and interpretation. Conceptualizations for this kind of support can be found in cognitive psychology and semiotics. The first deals with mental representations and cognitive architecture, the second with sign and symbol interpretation. These perspectives were directing the development of the decision support program STUDAS (STUDy Assistance System). Studas supports students facing the problem whether and how to continue their studies. Studas helps students in constructing an internal knowledge space. The program is based on questions like "Who am I?", "What do I want?", "What is (out) there?"and "How?"

Ad 4) Knowledge management, innovation and knowledge conversion: For this I refer to: http://www.bdk.rug.nl/onderzoek/castor/

CURRICULUM VITAE René Jorna

Date of birth: January 23, 1953

Bachelor Philosophy: July 1975 (University of Groningen)

Bachelor Psychology: April 1977 (University of Groningen)

Masters Philosophy: February 1981 (Major: Analytic Philosophy; Minor: History of Philosophy)

Masters Psychology: August 1982 (Experimental Psychology)

Dissertation (Ph. D.): February 16, 1989 University of Groningen.

Title Dissertation: Knowledge representation and symbols in the mind

Positions:

(1980 - 1982) Teacher in philosophy on senior high school, V.W.O. in Holten

(1981 - 1983) Researcher "theories in cognitive psychology" at the Philosophy Department of the University of Brabant, Tilburg.

(1980 - 1987) Teacher in higher vocational education in statistics, methodology, philosophy, psychology and informatics at the Noordelijke Leergangen in Leeuwarden.

(1984 - 1988) Researcher (grant of the National Science Foundation) at the department of Experimental Psychology (Groningen) on the subject of knowledge (and mental) representations.

(1987 - 1990) Assistant professor Management Informatics at the Faculty of Management & Organization, University of Groningen

(1990 - 1999) Associate Professor Decision Support Systems and Knowledge Systems, Faculty of Management & Organization, University of Groningen.

(1999 - present) Professor in Management Science and Cognition at the Faculty of Management & Organization, University of Groningen

Research:

•     Study and travel grant of the National Science Foundation for a visit to Canada (Alberta) and USA (Carnegie-Mellon, Pittsburgh), May, 1987.

•    Grant for participation in the Summerschool of the European Society for Cognitive Psychology on Cognitive Aspects of Human Memory (MĂŒnchen), July, 1987.

•     Grant of the National Science Foundation for a translation of an adjusted and extended version of the dissertation, May 1990.

•     Project leader of the DISKUS-project (Dynamic Interactive Scheduling and Knowledge Utilization System), coordination of 10 researchers; responsible for a) nurse scheduling and b) a generic model for planning and scheduling applications; Diskus was a research group consisting of members of 3 universities and 7 companies that was involved in the development of computer support for planning and scheduling (1989-1994).

•    Full member of the European Society of Cognitive Psychology.

•    Full member and member of the board of the International Society for Theoretical Psychology (ISTP); Chairman ISTP 1997-2001.

•     Member International Association for Semiotic Studies.

•     Member of the Beirat of the Deutsche Gesellschaft fĂŒr Semiotik. (1994- present)

•     Organization of International Congress on "Expert Systems, Culture and Semiotics" in Groningen December 12-15, 1990.

•     Visiting researcher University of Buenos Aires, Faculty of Economics, November 1995.

•     Visiting researcher University of Indonesia, Jakarta, Inter University Center Social Sciences (September 1996 - July 1997).

•     Research Fellow of the SOM, the research school of the faculties of a) Economics, b) Management and Organization and c) Spatial Sciences of the University of Groningen (1996 - present).

•     Theme Supervisor of the SOM A-program: "Primary Processes" (1998-2001).

•     Research coordinator of the CASTOR-research project in the Faculty of Management & Organization (1999-2001).

•     Invited Cluster Chair on "Semiotics and Knowledge Systems" at the 7^th Conference of the International Association of Semiotic Studies (IASS), October 1999 Dresden, Germany.

•     Invited Cluster Chair on "Planning and Scheduling" at the INFORMS Fall 1999 Conference, November 1999, Philadelphia, USA.

•     Invited member of the Summerschool “Semantics and Meaning”, TU Dresden, September 2001.

•     Best paper award on CASYS’01 (Computing Anticipatory Systems 2001) in Luik (Liege), Belgium, together with Wout van Wezel

•     Member of the Scientific Board of the University of Groningen 2000-2001

•     Invited paper for the SEE-2001 conference on Information Systems at the University of Toronto, October 6-8, 2001

•     More than 250 lectures in the Netherlands and other countries for scientific communities, organizations, companies and institutions.

Dissertation supervision (promotor):

•     Dieta Mietus (RuG): Understanding planning for effective decision support. October 27, 1994 (Promotor J. Simons; Co-promotor: R. Jorna)

•     Pim Haselager (V.U. Amsterdam): The right frame of mind. June 20, 1995 (cum laude; Promotor H. van Rappard; Co-promotor R. Jorna).

•     Han Numan (RuG): Knowledge Systems as Companions: Trust, Human Computer Interaction and Complex Systems. May 14, 1998. (Promotor W. van Rossum; Co-promotor: R. Jorna).

•     Tomas Klos (RuG): Agent-Based Computational Transaction Cost Economic. July 6, 2000 (Promotores B.Nooteboom & R.J. Jorna).

•     Hans van den Broek: On Agent Cooperation: The relevance of cognitive plausibility for multi-agent simulation models of organizations. Januari 8, 2001 (promotores J.L. Simons, H. Gazendam and R.J. Jorna).

•     Wout van Wezel: Tasks, hierarchies and flexibility: Planning in food processing industries. November 22, 2001 (promotores G.J.C. Gaalman and R.J. Jorna).

•     Andreas Budihardjo: Planner’s Job Decision Latitude and Responsiveness: An empirical study on planning effectiveness in road transport companies: January 24, 2001 (promotores R.J. Jorna, A. van der Zwaan and J.Wijngaard).

•     Henrico Wanders: A scheduling support system in the cardboard industry: a marriage between Operations Research and Cognitive Science (supervision together with G. Gaalman and G. Sierksma; dissertation expected: April 2002).

•     Petra Bosch: Virtual Organizations and Knowledge Management (Supervision together with A. Sorge; dissertation expected in September 2002)

•     Constantijn Heesen: Knowledge Systems for Multiple Planning in Patient Admission in Hospitals (supervision together with J. Simons; dissertation expected: December 2002).Š    Larissa Sjarbaini: Innovation, Knowledge Conversion and Representations: The Planning Case (started: September 1998; supervision together with B. Nooteboom)

•     Xander van der Voort: Innovation, Knowledge Conversion and Representations: The ITIL Case (started September 1998; supervision together with B. Nooteboom).

•     Sonja Rispens: The implementation and validation of the SEC-system (started September 1999; supervision together with J. Boersma).

•     Martin Helmhout: Cognition-based Multi-agent systems (started May 2001; supervision together with H. Gazendam)

•     Ruben Cijsouw: Knowledge and Innovation: Knowledge management and project control for innovative medical product design (started November 2001; supervision together with G. Rakhorst)

Teaching experience:

•     Courses on Experimental Psychology, Cognitive Psychology, Cognitive Task Analysis, Philosophy and Psychology, Developmental Psychology (1978-1988).

•     Courses on Analytic Philosophy, Epistemology, History of Philosophy, especially Greek philosophy, the 16/17 century Philosophy, the 18/19 century Philosophy and Social Philosophy (1978-1989)

•     Courses on Statistics and Methodology (1980-1985).

•     Courses on Databases, Knowledge Systems, Decision Making under Uncertainty, Management Information Systems, Planning and Scheduling and Management & Philosophy (1987-1999).

Publications:

Jorna, R.J. (1979). Conditionelen, en hoe zit het dan met de contexten? Heymans Bulletin, 79-448-SW. (Conditionals, and what about the contexts?)

Jorna, R.J. (1981). Het behaviorisme terug naar af of alleen maar uit de mode? Gedrag, 8, 171-175. (Behaviorism back to its beginning or just out of fashion)

Jorna, R.J. (1981). Associatie, van copula naar functie. Doctoraal scriptie filosofie, R.U. Groningen. (Association, from copula to function)

Jorna, R.J. (1982). Naar een diagnose van brokken met breuken. In P.R.J. Simons & H. Lodewijks (red.). Strategieën in leren en ontwikkeling. Lisse: Swets & Zeitlinger. (Towards a diagnosis of mistakes with fraction assignments)

Jorna, R.J. (1982). Autonomie in de psychologie: bepaling door het zelf of verklaringsmodel? Paper on symposium "Autonomie in de sociale wetenschappen" te Leusden. (Autonomy in psychology: determination by the self or model of explanation)

Been, P.H., Jorna, R.J. & Sijtsma, K. (1984). Over kijken, meten en modellen bij breukrekentaken. In P. Vos e.a. (red.). Rekenen, theorieën en modellen achter experimenteel onderzoek. Lisse: Swets & Zeitlinger. (About observing, measuring and modeling in fraction assigments)

Jorna, R.J. (1984). Een socioloog kijkt naar de psychologie. Kennis & Methode, VIII, 1. (A sociologist looks at psychology)

Jorna, R.J. (1984). Frege en interne representaties. In Proceedings Filosofiedag 1984. T.H. Twente. (Frege and internal representations)

Bax, A. & Jorna, R.J. (1986). Locke's "idee" en Yoltons "claim": een bijdrage tot de discussie over representatie en directe perceptie. Tijdschrift voor Filosofie, 48, 3, 469-479. (Locke's Idea and Yolton's Claim: a contribution to the discussion on representation and direct perception)

Jorna, R.J. (1986). Schijngestalten der menselijke waardigheid. Wijsgerig Perspectief, 26, 5, 143-151. (Appearances of human dignity)

Jorna. R.J. (1986). Husserl en de cognitieve psychologie. In F. van Raalten. Antropologie in Hoofdzinnen. Baarn: Ambo. (Husserl and cognitive psychology)

Jorna, R.J. (1987). Symbols in the mind; what are we talking about? In Wm.J. Baker, M.E. Hyland, H. Van Rappard & A.W. Staats (eds.). Current Issues in Theoretical Psychology. Amsterdam: North Holland.

Jorna, R.J. (1988). A comparison of presentation and representation: linguistic and pictorial. In G.C. v.d. Veer & G. Mulder (eds.). Human-Computer Interaction - Psychonomic Aspects. Berlin: Springer Verlag.

Van der Beek, D., van Maanen, L., Ossebaard, C., Been, P.H., Jorna, R.J. & Mulder, G. (1988). Breukrekenen, wat een opgave!: een onderzoek naar onderwijseffecten gedifferentieerd naar een opgavetaxonomie. In E. Harskamp & W. Hoeben (red.). Prestaties en leermethoden in het onderwijs. Lisse: Swets & Zeitlinger. (Fractions: what an assignment: a study in educational effects differentiated by assignment taxonomy)

Van der Beek, D., van Maanen, L., Ossebaard, C., Been, P.H., Jorna, R.J. & Mulder, G. (1988). Fractions, pupils and their instruction in arithmetics. Cognitive Systems. 2, 1.

Jorna, R. J. (1988). Category mistakes in ACT* and GAPS: remarks on Anderson's Adaptive Control of Thought and Tulving's General Abstract Processing System, In Wm.J. Baker, L.P. Mos, H. Van Rappard & H.J. Stam (eds.), Recent Trends in Theoretical Psychology. Berlin: Springer Verlag.

Jorna, R.J. (1988). Bericht ĂŒber die Sommerakademie der European Society for Cognitive Psychology, Zeitschrift fĂŒr Semiotik, 10, 1-2, 149-151.

Jorna, R.J. (1989). Kennisrepresentaties en symbolen in de geest; een analyse van het representatiebegrip en het symboolbegrip in de cognitieve psychologie. Academisch Proefschrift. Haarlem: Thesis.

Jorna, R.J, Mietus, D.M., Oei, H. & Simons, J.L. (1989). Verpleegdienstroostering (Vedir); een onderzoek naar computer ondersteuning bij het maken van roosters voor verpleegkundigen in het Academisch Ziekenhuis Groningen. Intern Rapport. Bestuurlijke Informatiekunde, Bedrijfskunde, RijksUniversiteit Groningen. (Nurse Scheduling: A study in computer support)

Michon., J.A. & Jorna, R.J. (1989). Cognitieve modules: verscheidenheid in eenheid?, in: C. Brown, P. Hagenoort & T. Meijering (red.). Vensters op de geest. Utrecht: Grafiet. (Cognitive modules: diversity in unity)

Jorna, R.J. (1989). Wiskunde kan men leren! Tijdschrift voor Onderwijswetenschappen, 20. (It is possible to learn mathematics)

Jorna, R.J. (1990). Knowledge Representation and Symbols in the Mind. TĂŒbingen: Stauffenburg Verlag.

Jorna, R.J. (1990). Guest editor of a special issue of the Zeitschrift fĂŒr Semiotik: Zeichen im Gehirn? Semiotik und KĂŒnstliche Intelligenz, with contributions of Goschke, Smythe, van Leeuwen, Visser en Mainzer. In this issue:

Jorna. R.J. (1990). Vorwort: Zur Erforschung natĂŒrlicher und kĂŒnstlicher Intelligenz, Zeitschrift fĂŒr Semiotik, 12, 3-8.

Jorna. R.J. (1990). WissenreprĂ€sentation in kĂŒnstlichen Intelligenzen. Zeichentheorie und Kognitionsforschung. Zeitschrift fĂŒr Semiotik, 12, 9-23.

Jorna, R.J. & van Heusden, B. (1990). Kennismanagement: expertsystemen en organisaties vanuit semiotisch perspectief. Filosofie in Bedrijf, 2, 1. (Knowledge management: expert systems and organizations in semiotic perspective)

Jorna, R.J. (1990). An analysis of approaches to mental representation(s). Semiotica, 40, 115-126.

Jorna, R.J. (1990). The Computational Theory of Mind and Constraints on the Notions of Symbol and Mental Representation. In Wm. J. Baker, M.E. Hyland, R. van Hezewijk & S. Terwee (eds.). Recent Trends in Theoretical Psychology, Volume II. Berlin: Springer Verlag.

Jorna, R.J. & van Heusden, B. (1990). Semiotics of the User-Interface. Paper presented at the 6th International Conference of the Deutsche Gesellschaft fĂŒr Semiotik Passau (Germany) October 8-11, 1990.

Gazendam, H. & Jorna, R.J. (1991). The mind metaphor for decision support systems. In A.A. Verrijn-Stuart, H.G. Sol & P. Hammersly (Eds.). Support Functionality in the Office Environment. Amsterdam: Elsevier, North Holland.

Jorna, R.J. & Simons, J.L. (1991). Kennissystemen en de weerbarstige praktijk. In Proceedings NOBO 1991. Twente. (Knowledge systems and stubborn reality)

Jorna, R.J. (1992). Cognitive Science, connectionism and the concept of association; a critical examination. Paper on the 5th congress of the European Society for Cognitive Psychology, Paris, September 12 -16, 1992 (internal rapport)

Jorna, R.J. The coming on of the icons: a cognitive and semiotic analysis. Paper on the 38th congress of the Deutsche Gesellschaft fĂŒr Psychologie, Trier, September 28 - October 1, 1992. (internal rapport)

Jorna, R.J. (1992). Het Ziekenhuis Roostersysteem: Plannen met zijn tweëen. Presentation on the symposium for Prof.Dr. J.A.Michon, July 1, 1992. (internal rapport) (The hospital scheduling system: a pas de deux)

Jorna, R.J. & Simons, J.L. (red.) (1992). Kennis in organisaties: theorie en toepassingen van kennissystemen. Muiderberg: Coutinho. (Knowledge in Organizations: Theory and applications of knowledge systems)

Jorna, R.J. (1992). Filosofische achtergronden van kennissystemen. (Philosophical Backgrounds of Knowledge Systems). In: R.J. Jorna & J.L. Simons (red.)

Jorna, R.J. (1992). Het representeren van kennis en kennisrepresentaties. (Representing Knowledge and Knowledge Representations) In: R.J. Jorna & J.L. Simons (red.)

Visser, H. & Jorna, R.J. (1992). Zoeken en redeneren: strategieën en mechanismen. (Searching and reasoning: strategies and mechanisms) In: R.J. Jorna & J.L. Simons (red.).

Jorna, R.J. en de Diskus-groep (1992). DISKUS-ZKR: van cognitieve taakanalyse naar kennissysteem. Eindrapport Diskus project: Intern rapport. Bestuurlijke Informatiekunde, Bedrijfskunde, RijksUniversiteit Groningen. (Diskus-ZKR from cognitive task analysis to knowledge system)

Jorna, R.J., Huisman, E.J. & Sibum, S. (1992). Het Scheduling Expertise Centrum (SEC): Algemene aanpak, model, vragenlijst en kennissysteem. Diskus-C project: Intern rapport: Bestuurlijke Informatiekunde, Bedrijfskunde, RijksUniversiteit Groningen. (The Scheduling Expertise Center: General Approach, Model, Questionnaire and Knowledge System)

Jorna, R.J. (1992). The relevance and meaning of symbols in cognitive science. In M. Balat & J. Deledalle-Rhodes (eds.). Signs of humanity. Berlin: Mouton de Gruyter.

Jorna, R.J. (1992). Mens-computer-interactie in semiotisch perspectief. SEIN, Informatieblad van de Nederlandse Vereniging van Semiotiek. (Man-machine-interaction in semiotic perspective)

Jorna, R.J., van Heusden, B. & Posner, R. (Eds.) (1993). Signs, Search and Communication; Semiotic Aspects of Artificial Intelligence. Berlin: Walter de Gruyter.

Jorna, R.J. & van Heusden, B. (1993). Signs, search and communication: Towards an empirical future for semiotics. In: R.J. Jorna, B. van Heusden & R. Posner (Eds.)

Slikkerveer, L.J., van Heusden, B. Jorna, R.J. & Broek, G. van den (Eds.) (1993). The Expert Sign: Semiotics of Culture and Organization. Leiden: DSWO Press.

Jorna, R.J. (1993). Cognitive science and connectionism: friend and enemy or move and counter-move, an application of empirical logic. In R.J. Dalitz, E.C.W. Krabbe & P.A. Smit. (eds.). Empirical Logic and Public Debate. Poznan Studies in the philosophy of science, 35. Amsterdam: Rodopi Press.

Boersma, S.K.Th., Jorna, R.J. & Simons, J.L. (1993). Kennissystemen, een nieuwe organisatie van taken, Bedrijfskunde, 25, 4. (Knowledge systems: a new organization of tasks)

Sibum, S., Jorna, R.J., Wezel, W. van & Huisman, E.J. (1993). Het SEC-systeem: een systeem voor hergebruik bij het ontwikkelen van schedulingstoepassingen. In Proceedings Ned. A.I. Conferentie 1993. T.H. Twente.

Huisman, E.J, Oldenkamp, J.H., Jorna, R.J. & Sibum, S. (1993). Het Ontologisch Ontwerpen van Schedulingsapplicaties: Kennissystemen en het Scheduling Expertise Centrum. In R. van der Spek. (red.). Kennistechnologie 1993. Rijswijk: Stam. (The ontological design of scheduling applications)

Jorna, R.J. & Gazendam, H. (1993). Theories about architecture and performance of multi-agent systems. 3rd European Congress of Psychology, Tampere, Finland, July 4, 1993. (internal rapport)

Jorna, R.J. (1994). Een nieuwe inhoud voor bedrijfskunde of waarom de bedrijfskunde geen technische wetenschap is. Bedrijfskunde, 16, 1. (A new content for management science or why management science is not a technological science)

Jorna, R.J. (1994). Roosteren met kennis: verpleegdienstroostering in nieuw perspectief, Tijdschrift voor Medische Informatica, 94, 3, 145-152. (Scheduling with knowledge: nurse scheduling in a new perspective)

Jorna, R.J. (1994). The semiotic (sign-oriented) aspects of connectionism. In I. LĂŒbeck, R. van Hezewijk, G. Pheterson & Ch. Tolman. (Eds.). Recent Trends in Theoretical Psychology IV. New York: Springer.

Jorna, R.J. (1994). The Gap between Cognitive Science and Organizational Theory, Knowledge and Policy, 7, 4.

Jorna, R.J. (1994). Symbolen en iconen: syntaxis en semantiek. In J. van der Lubbe & A. van Zoest (red.). Proceedings van de Peirce Toogdag. T.U. Delft. (Symbols and icons: syntax and semantics)

Numan, J.H., Jorna, R.J. & Arion, M. (1994). Designing knowledge-based systems with the aid of HCI. In: Tauber, M.J. et al. (Eds.). Proceedings of the SchÀrding Workshop: Interdisciplinary design of computer systems. SchÀrding, Austria.

Arion, M., Numan, J.H. & Jorna, R.J. Placing trust in Human-Computer-Interaction. In R. Opperman et al. (Eds.) Proceedings of ECCE 7, European Conference on Cognitive Ergonomics: Human Computer Interaction. Bonn.

Jorna, R.J. & Haselager, W.F.G. (1994). Associationism: not the cliff over which to push connectionism. International Journal of Intelligent Systems, 4, 3-4, 2, p 279-307.

Jorna, R.J. & A. Blaauw. (1994). Scheduling in SEC-perspectief. Final report Diskus-C. Internal Report Bedrijfskunde. Rijksuniversiteit Groningen. (Scheduling in SEC-perspective)

Jorna, R.J. & W. van Wezel (1994). Taakondersteuning bij planning: hergebruik van informatie verkregen uit taakanalyse. In: Noordman, L.G.M. & Vroomen, W.A.M. (red.) Informatiewetenschap 1994. Tilburg: Stinfon, p. 69-84. (Task support for planning: reuse of information obtained from task analysis)

Jorna, R.J. & Mietus, D.M. (1994). Cognitive task analysis in nurse scheduling; a case study and lessons to be learned for other scheduling situations. First European Congress of Cognitive Science in Industry, Luxembourg, September 28-30, 1994. (internal rapport)

Jorna, R.J. (1994). Semiotic engineering: modelling information systems by signs. Fifth Congress of the International Association for Semiotic Studies, Berkeley, USA, June, 12-18, 1994. (internal rapport)

Jorna, R.J. & D.M. Mietus. (1994). The decomposition of planning and scheduling: a cognitive task analysis. 8th Congress of the European Society of Cognitive Psychology, Lissabon, September 10 -14, 1994. (internal rapport)

Jorna, R.J. (1994). A general model for planning and scheduling: a semiotic perspective. NASA, Washington, USA, June 1994. (internal rapport)

Figge, U., Jorna, R.J. & van Heusden, B. (Eds.) (1995). The Semiotics of Time and Computer. Kodikas/Code Ars Semeiotica; An International Journal of Semiotics, 18, 4, 201-312.

Jorna, R.J. & Heusden, B. van ( 1995). The discovery of time: sign and semiosis. Kodikas/Code Ars Semeiotica; An International Journal of Semiotics, 18, 4, 205-218.

Hospers, J. & Jorna, R.J. (red.)(1995). Plannen met kennis. Kennistechnologie voor plannings- en schedulingsproblemen. Lansa: Leidschendam. (Planning with the help of knowledge: knowledge technology for planning and scheduling problems)

Jorna, R.J., Broek, H. van den & Klos, T. (1995). Simulatiemodellen van hoog naar laag. NVKI-nieuwsbrief 12, 3, 64-67. (Simulation models from top to bottom)

Jorna, R.J. & W. van Wezel (1995). Worldmaking with Objects: a Case in Semiotic Engineering. SOM Research Report 95A12. Groningen: University of Groningen.

van Wezel, W., D. Mietus & R.J. Jorna (1995). A generic view on supporting the scheduling task. In: Steel, S. (Ed). Papers of the 14th Workshop of the UK Planning and Scheduling Special Interest Group. Technical Report 255, Colchester, UK: University of Essex.

Heesen, H.C. & Jorna R.J. (1995). A user oriented scheduling systems development method. In: S. Steel (ed). Papers of the 14th Workshop of the UK Planning and Scheduling Special Interest Group. Technical Report 255, Colchester, UK: University of Essex.

Jorna, R.J. (1995). Semio-psychology, or why semiotics is of relevance for psychology, In: Larsen, S.E. (Ed.). The Emergence of Codes and Intentions as a Basis of Sign Processes. Humanities Research Center, Odense University, Odense.

Jorna, R.J. & Heusden, B. van (1996). Semiotics of the User-Interface. Semiotica, 109, 3/4, p.237-250.

Jorna, R.J., Gazendam, H., Heesen H.C.& Wezel W. van (1996). Plannen en Roosteren: Taakgericht analyseren, ontwerpen en ondersteunen. Lansa: Leidschendam. (Planning and Scheduling: task oriented analysis, design and support)

Jorna, R.J. (1996). Upgrading psychology: a new role for semiotics. In: Tolman, Ch., LĂŒbeck, I. & Hezewijk, R. van (Eds.). Recent Trends in Theoretical Psychology V. New York: Springer.

van Wezel, W., R.J. Jorna & D. Mietus (1996). Scheduling in a Generic Perspective. Knowledge -Based Decision Support by Domain Analysis and Cognitive Task Analysis. International Journal of Expert Systems, 9, 3, pp. 357-381.

Jorna, R.J. & W. van Wezel (1997). Objects and the World Metaphor: a Semiotic Engineering Approach. In: Nöth, W. (Ed.). Semiotics of the Media: State of the Art, Projects, and Perspectives. New York: Springer-Verlag.

van Wezel, W. & R.J. Jorna (1997). The SEC-system: Reuse Support for Scheduling System Development. Research Report University of Groningen, SOM 97A11, pp. 1-33.

Jorna, R.J. & W. van Wezel (1997). Tasks, Cognitive Agents, and KB-DSS in Workflow and Process Management. Research Report University of Groningen, SOM 97A23, pp. 1-35.

Jorna, R.J. (1997). Dienstroosters, In BĂŒthker, W.F., Husmann, A.W. & Zeilstra, H.J. (red.). Handboek Administratie: van theorie naar praktijk. Alphen a/d Rijn: Samson. (blz. B 4050-1 t/m 17). (Shift schedules)

Jorna, R.J. (1997). Semiotiek en psychologie: tekens, bewustzijn en gedrag, in: J.C.A. van der Lubbe & A.J.A. van Zoest (red.). Denken in tekens. Gottmer & Becht; Bloemendaal. (Semiotics and psychology: signs, consciousness and behavior)

Jorna, R.J. (1997). The Subject of Psychological Research Reconsidered. Theory & Psychology, 7,4. Pp. 565-67.

Jorna, R.J. & van Wezel, W. (1997). Knowledge Technology and Scheduling and Planning. Journal of Management and Economics, 1.1, pp. 35-51.

Jorna, R.J. (1998). Knowledge Management really is about Representations. The Semiotic Review of Books, Vol 9.2 , pp. 5-8.

Jorna, R.J. (1998). Het Scheduling Expertise Concept (SEC): Een conceptueel raamwerk voor plannen en roosteren. Bedrijfskunde 70,1, p 52-63. (SEC: A conceptual framework for planning and scheduling).

Jorna, R.J. (1998). Kennismanagement gaat (eigenlijk) over representaties. Bedrijfskunde, 70, 2, pp.90-98.

Jorna, R.J. & W.E. Smythe (1998). Editors special issue: Semiotics and Psychology: The Signs We Live By. Theory & Psychology, Vol. 8.6, pp.723-730.

Jorna, R.J. & van Heusden, B. (1998). Semiotics and information-psychology: a case for semio-psychology. Theory & Psychology, Vol 8.3, pp 755-782.

Gazendam, H.W.M. & Jorna, R.J. (1998). Semiotics, multi-agent systems and organizations. Proceedings of the NIST '98. Nat. Institute for Standards and Technology: Washington.

Jorna, R.J. & Heesen, C. (1998). A Semiotic Interpretation of Coordination in Multiple Planning. Proceedings of the NIST '98. Nat. Institute for Standards and Technology: Washington.

Gazendam, H.W.M. & Jorna, R.J. (1998). Theories about Architecture and Performance of Multi-agent Systems. University of Groningen: SOM Research Report 98 A02.

Van Wezel, W. & Jorna, R.J. (1999). The SEC-system: Reuse Support for Scheduling System Development.Decision Support Systems: The International Journal 26, p.67-87.

Jorna, R.J. (1999). New opportunities for psychology: signs and information. In: Mayers, W. and others (Eds.). Challenges to Theoretical Psychology (pp. 120-128). Toronto; Captus Press.

Mayers, W., Delgado, B., Bayer, B., Jorna, R.J.& Schraube, E (Eds.) (1999). Challenges to Theoretical Psychology. Toronto: Captus Press.

Jorna, R.J. (1999). Kennismanagement en de conversie van kennis als organisatievraagstuk. Filosofie in Bedrijf, 9, 3, p. 32-45.

Wanders, L.T. Gaalman, G.C., Jorna, R.J. & Sierksma, G. (1999). Integrating cognitive science and operations research techniques for building a better planning support system for a solid board factory. In: Lenco, P. (ed.). Human Centered Processes: HCP 1999. Centre Universitaire Brest.

Van Heusden, B & Jorna, R.J.(1999). Organizational semiotics or: (how) do organizations know? The Semiotic Review of Books, Vol. 10-1, pp.2-5.

Jorna, R.J. & B. van Heusden (1999). Kennismanagement en de cognitieve dynamiek in organisaties. In: Kennismanagement. VROM, internal publication , p. 24-39. (Knowledge management and cognitive dynamics in organization)

Jorna, R.J. & B. Van Heusden (2000). Cognitive Dynamics:A Framework to Handle Types of Knowledge. In: J. Schreinemakers (Eds.) Knowledge Management: The 7th ISMICK Conference Rotterdam University Press, p. 128- 145.

Jorna, R.J. (2000). De ‘zwarte doos’ in de bedrijfskunde: cognitie in actie. (Inaugural lecture; June 2000; University of Groningen; Faculty of Management & Organization. (The “black box” in management science: cognition in action).

Heusden, B. van & Jorna, R.J.(2001). Toward a Semiotic Theory of Cognitive Dynamics in Organizations. In: K. Liu, R.J. Clarke, P.B. Andersen & R.K. Stamper (Eds.). Information, Organisation and Technology: Studies in Organisational Semiotics. Boston: Kluwer. pp.83-113.

Jorna, R.J. (2001). Semiotics, Signific Concept Analysis and the Heritage of A.D. de Groot. In; Schmitz, W & Sebeok, T.A (Eds.). The European Semiotic Heritage. Dresden: Dresden University Press, pp 215-237.

Jorna, R.J. (2001). Decision Making, Semiosis and the Knowledge Space: The Case for Studas. Semiotica, 130 -1/4. pp 97-119.

Jorna, R.J. & Van Heusden. B. (2001). Why Representation(s) Will Not Go Away: Crisis of Concept or Crisis of Theory? In: W. Nöth & Ljuneberg, C. (Eds.) Crisis of Representation. TĂŒbingen: Stauffenburg Verlag. pp 150-175.

Jorna, R.J. (2001). De ‘zwarte doos’ in de bedrijfskunde: cognitie in actie. Nederlands Tijdschrift voor de Psychologie, 55, 6, pp 287-295. (The black box in management science: cognition in action)

Budihardjo, A, Jorna, R.J. & Koster, C. (2001) Identification of the Dutch and Indonesian managers’ national values, styles and decision making process. Journal Management Prasetiya Mulya, Volume 6, 11, pp 17-22.

Wezel, W. van & R.J. Jorna (2001). Paradoxes in Planning. Engineering Applications of Artificial Intelligence, 14, pp 269-286.

Nooteboom, B., Klos, T. & Jorna, R.J. (2001). Adaptive trust and co-operation: An agent-based simulation approach. In R. Falcone, M. Singh & Y.H. Tan (Eds.). Trust in Cyber-society: Integrating Human and Machine Perspective. Springer Verlag: New York. pp

Jorna, R.J. (2001). Decision making, semiosis, and the knowledge space: the case for Studas. In: P.Perron, M.Danesi, J. Umiker-Sebeok & A. Watanabe (Eds.). Semiotics and the Information sciences. Legas: New York, pp.97-120.

Jorna, R.J. (2001). Organizational forms, coordination and knowledge types. Proceedings of the International Society for Knowledge Organziation (ISKO); March 2001, Berlin

Jorna, R.J. (2001). De cognitieve kant van kennismanagement: over representaties, kennis-typen, organisatievormen en innovatie. In: A. Witteveen & P. van Baalen (Eds.). Kennis en Management. Scriptum (The cognitive approach to knowledge management: about representation, knowledge types, organizational forms and innovation. In: Knowledge and Management)

Jorna, R.J. (2001). Knowledge types and organizational forms in knowledge management. In: S. Tsuchiya & J.P. Barthes (Eds.) Proceedings of the Eight Intern. Symp. on the Management of Corporate and Industrial Knowledge (ISMICK’01), October 22-24, 2001 Compiegne. University Press of Compiegne.

Van Heusden, B. & R.J. Jorna (2002). Reconsidering the Standard: A Semiotic Model of Organisation(s). In: Kechen Liu (Ed.) Semiotics in Organizational Theory. Amsterdam: Kluwer (In press)

Jorna, R.J., (2002). Planning behavior in different domains: Lessons for software support. Submitted for publication.

Michon, J.A., Jackson, J.L. & Jorna, R.J. (2002). Semiotic Aspects of Psychology. In: R.Posner, K. Robbering and T.A. Sebeok (Ed.). Semiotics: A Handbook on the Sign-Theoretic Foundations of Nature and Culture. Berlin: de Gruyter. (In press)

Groningen: Last updated: November 1, 2001